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WO2011145369A1 - Dispositif de réception de radiodiffusion numérique et procédé de réception de radiodiffusion numérique - Google Patents

Dispositif de réception de radiodiffusion numérique et procédé de réception de radiodiffusion numérique Download PDF

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Publication number
WO2011145369A1
WO2011145369A1 PCT/JP2011/053197 JP2011053197W WO2011145369A1 WO 2011145369 A1 WO2011145369 A1 WO 2011145369A1 JP 2011053197 W JP2011053197 W JP 2011053197W WO 2011145369 A1 WO2011145369 A1 WO 2011145369A1
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WIPO (PCT)
Prior art keywords
information
signal
motion warning
unit
earthquake
Prior art date
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Ceased
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PCT/JP2011/053197
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English (en)
Japanese (ja)
Inventor
真愉子 田中
孝敏 城杉
真一 村上
琢夫 小口
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Hitachi Consumer Electronics Co Ltd
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Hitachi Consumer Electronics Co Ltd
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Priority claimed from JP2010114884A external-priority patent/JP2011244229A/ja
Priority claimed from JP2010114883A external-priority patent/JP2011244228A/ja
Application filed by Hitachi Consumer Electronics Co Ltd filed Critical Hitachi Consumer Electronics Co Ltd
Publication of WO2011145369A1 publication Critical patent/WO2011145369A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/8126—Monomedia components thereof involving additional data, e.g. news, sports, stocks, weather forecasts
    • H04N21/814—Monomedia components thereof involving additional data, e.g. news, sports, stocks, weather forecasts comprising emergency warnings

Definitions

  • the present invention relates to a technique for transmitting and receiving emergency information transmitted by digital broadcasting.
  • the emergency warning broadcast activation flag included in the digital broadcast transmission signal is monitored, and if the emergency warning broadcast activation flag is “1”, forced service switching or normal energization from the standby state It is possible to provide emergency warning broadcasts to viewers quickly by shifting to. (See Patent Document 1)
  • Patent Document 1 discloses a reduction in power consumption in a so-called standby state where emergency warning broadcasting is monitored.
  • the emergency alert broadcast activated by the emergency alert broadcast activation flag has the emergency alert broadcast signal compressed and encoded on the transmission side, and it has been necessary to perform decompression decoding processing on the receiver side for reproduction. . For this reason, a delay time for compression / decompression has occurred before the emergency warning broadcast is reproduced.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide detailed operations of a transmission device and a reception device capable of reproducing emergency earthquake warnings transmitted by digital broadcasting without delay as much as possible. There is.
  • a transmission method and a reception device having a transmission method and a reception method capable of reproducing the emergency earthquake early warning on the receiver side without delay as much as possible. Can be provided.
  • FIG. 1 is a block diagram showing a configuration of a digital broadcast receiving apparatus that receives earthquake motion warning information transmitted using an AC signal included in segment number # 0 in Embodiment 1 according to the present invention.
  • FIG. 2 shows a block diagram of an embodiment of a digital broadcast transmitting apparatus that transmits a digital broadcast received by the digital broadcast receiving apparatus of the present invention.
  • a plurality of MPEG-2 transport streams (hereinafter referred to as TS) are re-multiplexed into one TS, subjected to transmission path coding processing, and then subjected to IFFT (Inverse Fast).
  • the signal is converted into an OFDM (Orthogonal Frequency Division Multiplexing) transmission signal composed of a plurality of subcarriers by Fourier Transform and transmitted as a broadcast wave.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the OFDM transmission signal in this digital broadcasting system has a configuration in which 13 OFDM segments obtained by dividing a transmission bandwidth of 6 MHz into 14 parts are connected, and hierarchical transmission of up to three layers is possible in units of OFDM segments. It has become.
  • the central segment (segment number # 0) can be set as a partial reception layer assuming reception by a mobile receiver such as a mobile phone.
  • FIG. 31 shows the segment structure.
  • a receiver that can receive all 13 segments of the OFDM transmission signal is called a 13-segment receiver, and a receiver that can receive one central segment of the OFDM transmission signal is called a one-segment receiver.
  • TMCC Transmission Multiplexing Configuration
  • SC Access Multiplexing Configuration
  • This frame configuration is shown in FIG. 32, the carrier positions and the number of carriers of TMCC signals and AC signals added as OFDM subcarriers differ depending on transmission parameters. Details will be described later.
  • emergency warning broadcasting activated by an emergency warning broadcast activation flag transmitted by TMCC is a system that provides emergency information to viewers when a tsunami warning is issued due to the occurrence of an earthquake. It is used to inform more quickly.
  • the broadcast station sets the emergency alert broadcast activation flag included in the TMCC signal to “ON” and broadcasts the content with the content that can be recognized as the emergency alert broadcast.
  • the Earthquake Early Warning is a method for immediately estimating the magnitude of an epicenter or earthquake by analyzing initial microtremors (so-called P waves) and main motions (so-called S waves) captured by a seismometer near the epicenter immediately after the occurrence of an earthquake. This is information that estimates the seismic intensity of major motions in each location based on the information and informs it as quickly as possible.
  • the Earthquake Early Warning is intended to ensure the safety of the viewer without panicking according to the surrounding situation by notifying the viewer before a strong shake arrives. This earthquake early warning is transmitted using an AC signal included in segment number # 0.
  • Earthquake motion warning information refers to information related to earthquake motion warning performed in accordance with the provisions of Article 13, Paragraph 1 of the Meteorological Business Law (Act No. 165 of 1974).
  • 201 is an information source encoding unit
  • 202 is an MPEG2 multiplexing unit
  • 203 is a TS remultiplexing unit
  • 204 is an RS (Reed-Solomon) encoding unit
  • 205 is a layer division unit.
  • Reference numeral 206 denotes a parallel processing unit, which includes three systems a, b, and c.
  • 207 is a layer synthesis unit
  • 208 is a time interleave unit
  • 209 is a frequency interleave unit
  • 210 is an OFDM frame configuration unit
  • 211 is an inverse fast Fourier transform (hereinafter IFFT) unit
  • 212 is a guard interval addition unit
  • 213 is a transmission unit
  • 214 is a pilot signal component
  • 215 is a TMCC signal component
  • 216 is an AC signal component.
  • a transport stream (TS) defined in MPEG2 Systems is converted into one TS by re-multiplexing one or a plurality of inputs, and after a plurality of transmission path encodings are performed according to the service intention, Finally, it is transmitted as one OFDM signal.
  • the transmission spectrum of television broadcasting is formed by connecting 13 OFDM blocks (hereinafter referred to as OFDM segments) obtained by dividing the channel bandwidth of television broadcasting into 14 equal parts. By structuring the carrier configuration of the OFDM segment so that a plurality of segments can be connected, a transmission bandwidth suitable for media can be realized in segment width units.
  • channel coding is performed in units of OFDM segments, a part of one television channel can be a fixed reception service and the rest can be a mobile reception service.
  • Such transmission is defined as hierarchical transmission.
  • Each layer includes one or a plurality of OFDM segments, and parameters such as a carrier modulation scheme, an inner code coding rate, and a time interleave length can be set for each layer.
  • the number of possible layers is up to 3 levels, and partial reception is also counted as one layer.
  • the number of segments and transmission path coding parameters in each layer are determined according to the organization information, and are transmitted by the TMCC signal as control information for assisting the operation of the receiver.
  • this digital broadcasting system has three different OFDM carrier intervals. These are identified as system modes.
  • the carrier interval is about 4 kHz in mode 1, about 2 kHz in mode 2, and about 1 kHz in mode 3. Although the number of carriers varies depending on the mode, the information bit rate that can be transmitted in any mode is the same.
  • the information source encoding unit 201 encodes the video signal, the audio signal, and the data, and the MPEG2 multiplexing unit 202 generates one TS.
  • the plurality of TSs output from the plurality of MPEG2 multiplexing units are input to the TS remultiplexing unit 203 so as to have an arrangement suitable for signal processing in units of data segments.
  • the TS re-multiplexing unit 203 it is converted into a burst signal format of 188 bytes by a clock that is four times the IFFT sample clock, and a Reed-Solomon outer code is added and converted into a single TS by the RS encoding unit 204.
  • the hierarchical division unit 205 divides the hierarchy according to the designation of the hierarchical information, and inputs it to a maximum of three parallel processing units 206a, 206b, and 206c.
  • Each of the parallel processing units 206a, 206b, 206c mainly performs error correction coding, digital data processing such as interleaving, and carrier modulation.
  • a delay correction is performed in advance for a delay time difference between hierarchies caused by the time axis operation of the byte interleave and the bit interleave to adjust the timing. Error correction, interleave length, and carrier modulation scheme are set independently in each layer.
  • the signal layered by the layer combining unit 207 effectively demonstrates error correction coding capability against electric field fluctuations and multipath interference in mobile reception.
  • the data is input to the time interval unit 208 and the frequency interval unit 209.
  • the time interleave method is a convolution interleave in order to shorten the combined delay time and suppress the memory capacity of the receiver.
  • the frequency interrib portion is configured by combining inter-segments and inter-interleaves so that a sufficient inter-rib effect can be exhibited while ensuring a segment structure.
  • TMMP Transmission and Multiplexing Configuration and Control
  • AC Alternative Channel
  • the information data from the frequency interleave unit 209, the pilot signal for synchronous reproduction from the pilot signal configuration unit 214, the TMCC signal from the TMCC configuration unit 215, and the AC signal from the AC signal configuration unit 216 are used.
  • An OFDM frame is constructed. This frame configuration is shown in FIG. Si, j represents a carrier symbol in the data segment after interleaving.
  • SP Spcattered Pilot
  • SP is a reference pilot symbol for the receiver to perform quasi-synchronous detection. As shown in FIG. 32, it is inserted once in 12 carriers in the carrier direction and once in 4 symbols in the symbol direction. If SP is interpolated in the symbol direction on the receiving side, SP of 3 (12/4) carrier interval can be obtained.
  • the guard interval length is 1/4 of the effective symbol length
  • multipath up to the maximum delay time that does not cause intersymbol interference is achieved by interpolation processing (transmission path characteristics estimation) by SP of 3 carrier intervals.
  • the guard interval ratio is 1/4
  • an SP of 4 carrier intervals may be used in principle, but it is inserted once in 4 symbols in the symbol direction in consideration of the characteristics of the interpolation filter.
  • the example of FIG. 32 is mode 1, but the carrier number in mode 1 is from 0 to 107, whereas in mode 2 and mode 3, it is from 0 to 215 and from 0 to 431, respectively.
  • the AC signal is arranged as shown in FIG. 32 and has a data amount of 204 bits per carrier. In addition, two AC signals are arranged for each segment in mode 1, four in mode 2, and eight in mode 3.
  • TMCC signals are arranged as shown in FIG. 32 and have a data amount of 204 bits per carrier. Further, one TMCC signal is arranged for each segment in mode 1, two in mode 2, and four in mode 3.
  • All signals after the frame configuration are converted into OFDM signals by IFFT operation of IFFT section 211, guard intervals are added by guard interval adding section 212 and converted to OFDM transmission signals, and digital broadcasting at a frequency determined by transmitting section 213 Converted to a signal.
  • 101 is an antenna
  • 102 is a channel selection unit
  • 103 is an orthogonal demodulation unit
  • 104 is a fast Fourier transform (hereinafter referred to as FFT) unit
  • 105 is a demodulation and decoding operation that performs demodulation and decoding operations of the present digital broadcasting system from the FFT unit 104 to the TS output.
  • FFT fast Fourier transform
  • 106 is a descrambling unit
  • 107 is a demux unit
  • 108 is a compressed broadcast video signal
  • 114 and 115 are switching units
  • 109 is decoded via the switching unit 114
  • 110 is an audio output unit for outputting a broadcast audio signal decoded via the switching unit 115, and these are mainstream blocks for reproducing the broadcast video signal and the broadcast audio signal. It is.
  • Reference numeral 111 denotes a synchronous reproduction unit
  • 112 denotes a frame extraction unit
  • 113 denotes a TMCC decoding unit, which performs synchronous signal reproduction for performing the operation of the demodulation decoding unit 105 and obtains information such as transmission parameters.
  • the channel selection unit 102, the TMCC decoding unit 113, and the switching units 114 and 115 constitute a broadcast receiving unit 119.
  • 116 is an AC decoding part
  • 117 is a discrimination part, and these constitute the earthquake motion warning information receiving part 120.
  • the switching units 114 and 115 perform switching between the video signal and the audio signal of the decoding unit 108 and the determination unit 117, respectively.
  • 118 is a control unit that performs operation control and power control of the broadcast receiving unit 119 and the earthquake motion warning information receiving unit 120.
  • Control unit 118, broadcast receiving unit 119, and earthquake motion warning information receiving unit 120 constitute digital broadcast receiving apparatus 121.
  • the channel frequency band to be received by the channel selection unit 102 is extracted from the digital broadcast received by the antenna 101, the UHF television broadcast channel is designated, and the signal selected by the orthogonal demodulation unit 103 is orthogonally demodulated into a baseband signal.
  • the FFT unit 104 converts the frequency axis processing, and FFT is performed for a period corresponding to an effective symbol among the OFDM symbols. At that time, the multipath situation of the received signal is taken into consideration, and the FFT processing is performed in an appropriate period.
  • the demodulation / decoding unit 105 performs demodulation processing on each carrier on the frequency axis (for example, synchronous demodulation using a scattered pilot (SP: see FIG.
  • TS transport stream
  • the descramble unit 106 scrambles the TS signal that has been scrambled for copyright protection, and outputs the descrambled signal to the demax unit 107.
  • a desired compressed broadcast video signal and a compressed digital signal of the broadcast audio signal are extracted and output to the decoding unit 108.
  • the decoding unit 108 decodes the compressed broadcast video signal and the compressed broadcast audio signal, the decoded broadcast video signal is sent to the video output unit 109 via the switching unit 114, and the decoded broadcast audio signal is the switching unit 115. Is output to the audio output unit 110.
  • the synchronization reproduction unit 111 receives the baseband signal from the orthogonal demodulation unit 103 and reproduces the OFDM symbol synchronization signal and the FFT sample frequency according to the mode and the guard interval length.
  • the mode and guard interval length can also be determined based on the correlation of the guard period of the OFDM signal.
  • the frequency position of the TMCC signal is detected from the output signal of the FFT unit 104.
  • the frame extraction unit 112 demodulates the TMCC signal at the detected frequency position and extracts a frame synchronization signal from the TMCC signal.
  • the frame synchronization signal is output to the synchronization reproduction unit 111, and phase adjustment with the symbol synchronization signal is performed.
  • the TMCC decoding unit 113 performs error correction of the differential cyclic code on the demodulated TMCC signal, and extracts TMCC information such as a hierarchical structure and transmission parameters.
  • the TMCC information is output to the demodulation / decoding unit 105 and used as various control information for the demodulation / decoding process.
  • the earthquake motion warning information receiving unit 120 includes an AC decoding unit 116 and a discrimination unit 117.
  • the AC decoding unit 116 extracts the seismic motion warning information when the configuration identification of the AC signal of the segment No. 0 of the FFT output indicates that the seismic motion warning information is transmitted (“001”, “110”: described later). . If the configuration identification is other than that, the AC signal is not decoded.
  • the extracted seismic motion warning information is discriminated by the discriminating unit 117, and when the seismic motion warning is to be issued, the information is converted into a video signal or an audio signal.
  • the video signal is sent to the video output unit 109 via the switching unit 114.
  • the audio signal is output to the audio output unit 110 via the switching unit 115.
  • the control unit 118 controls the switching units 114 and 115 when the emergency warning broadcast activation flag information from the TMCC decoding unit 113 and the seismic motion warning information from the seismic motion warning information receiving unit 120 are input and the seismic motion warning should be issued. Then, the video signal for the earthquake motion warning is output to the video output unit 109, and the audio signal for the earthquake motion warning is output to the audio output unit 110.
  • AC signal is an additional information signal related to broadcasting. Additional information related to broadcasting refers to additional information related to transmission control of modulated waves or earthquake motion warning information. Earthquake motion warning information is transmitted using the segment No. 0 AC carrier.
  • the AC signal is arranged as shown in FIG. 32 and has a data amount of 204 bits per carrier.
  • Fig. 3 shows the bit assignment of 204 bits B0 to B203 of the AC signal arranged in segment No.0.
  • One bit of B0 is used as a reference for differential demodulation.
  • the 3 bits from B1 to B3 are used as configuration identification to distinguish whether it is additional information or earthquake motion warning information.
  • Additional information or seismic motion warning information is sent out by 200 bits from B4 to B203.
  • earthquake motion warning information the same ground motion warning information is transmitted on all AC carriers in segment No. 0.
  • seismic motion warning information transmitted on different AC carriers can be analog-added on the receiver side, so that even smaller CN ratios can be received. .
  • Fig. 4 shows the standard for differential demodulation of B0.
  • the modulation method of the AC carrier is DBPSK, and the amplitude and phase reference for differential demodulation are given by Wi in FIG.
  • Fig. 5 shows the bit allocation when the seismic motion warning information is transmitted by the AC signal of segment No.0.
  • the AC is used for broadcasters as usual and transmits additional information related to transmission control of modulated waves.
  • ‘001’ and ‘110’ representing the transmission of the earthquake motion warning information have the same code as the first 3 bits (B1 to B3) of the TMCC synchronization signal, and are alternately transmitted for each frame at the same timing as the TMCC signal.
  • ⁇ 13 bits of B4 to B16 are used as synchronization signals.
  • the code obtained by concatenating the configuration identification and the synchronization signal is the same code as the TMCC synchronization signal and is composed of a 16-bit word.
  • the same bits as the TMCC synchronization signals (B1 to B16) are allocated, and w0 and w1 are alternately transmitted for each frame at the same timing to transmit the same code as TMCC. Since analog addition can be performed between the TMCC and the AC signal, the reception sensitivity of frame synchronization in the receiver can be improved.
  • 2 bits B17 to B18 are the start / end flags of earthquake motion warning information.
  • FIG. 6 shows the meaning of the start / end flag of the earthquake motion warning information.
  • 2 bits are assigned as the start / end flag of the seismic motion warning information in order to indicate that the receiver is automatically activated and that the seismic motion warning information is transmitted by an AC signal.
  • the start / end flag when representing the seismic motion warning detailed information or its test signal is set to ‘00’.
  • 2 bits are used for the start / end flag, and the inverted signal has the maximum intersymbol distance. Also, “10” and “01” are not used in order to ensure the reliability of the start / end flag.
  • Fig. 7 shows the meaning of the earthquake motion warning information update flag.
  • the update flag is incremented by 1 each time a change occurs in the details of the series of seismic motion warning details transmitted when the start / end flag is '00', '00' is the start value, and '11' Next to, it shall return to '00'.
  • the update flag is set to “11”.
  • Figure 8 shows an example of sending update flags.
  • the first report, the second report,... Show the state where the signal identification shown in FIG. 9 (described later) or the contents of the earthquake motion information shown in FIG. Even if the current time or page type shown in FIG. 10 (described later) changes, the value of the update flag does not change.
  • Fig. 9 shows the meaning of signal identification.
  • the signal identification of earthquake motion warning information is a signal used to identify the type of earthquake motion warning detailed information.
  • signal identification '000' / '001' / '010' / '011' is transmitted, and when the start / end flag is '11', signal identification '111' Is sent out.
  • the seismic motion warning detailed test signal (with / without corresponding area) and the seismic motion warning detailed information (with / without corresponding area) are not sent simultaneously.
  • the total number of earthquake motion information can be sent up to two, but the test signal and this signal are not sent simultaneously.
  • the 88 bits from B24 to B111 are detailed information on earthquake motion warning.
  • Fig. 10 shows the details. Bit allocation of detailed information on earthquake motion warning is specified for each signal identification.
  • a receiver that supports automatic startup with time adjustment using TOT (Time Offset Table) or a communication line, etc., receives the data by comparing the receiver time with the transmitted time information. The reliability of the seismic motion warning information can be confirmed.
  • TOT Time Offset Table
  • the allocation of information to be transmitted differs depending on the page type code.
  • the receiver can know which information is transmitted by checking the page type. When the page type is “0”, as shown in FIG. 11 (described later), information indicating the target area of the earthquake motion warning is transmitted. When the page type is ‘1’, information on the earthquake motion alarm source is transmitted as shown in FIG. 12. However, the seismic motion information of both page types “0” and “1” is not necessarily transmitted.
  • the page type is set to ‘0’ and all the earthquake motion information is set to ‘1’.
  • Broadcaster identification 11 bit is uniquely assigned to broadcasters nationwide. Broadcasters can be identified only by AC signals.
  • Fig. 11 shows earthquake motion information when the page type is '0'.
  • the information indicates the target area of the earthquake motion warning
  • FIG. 11 shows the bit allocation of the target area.
  • the bit assigned to the area including the target area of the earthquake motion warning is “0”, and the bit allocated to the area not including the target area of the earthquake motion warning is “1”. If earthquake information is not sent, set all to '1'.
  • the earthquake motion information (regional information) of page type '0' may be sent as the first and second, respectively.
  • the update flag is not updated when the transmission of alarm information (regional information) changes from the first to the second, or from the second to the first.
  • FIG. 12 shows earthquake motion information when the page type is “1”.
  • “Earthquake motion warning identification” assigns 9 bits to identify earthquake motion warning information when multiple earthquake motion warnings occur. If it is determined based on the time (in seconds) to distinguish multiple earthquake motion warning information, it is possible to identify the earthquake motion warning information for the past 8 minutes and 32 seconds with 9-bit earthquake motion warning identification. . By comparing the current time of B24 to B54 with the occurrence time of B101 to B110, the number of seconds that have elapsed since the occurrence of the earthquake motion can be known.
  • the B57 seismic motion information identification is “0” when the transmitted seismic motion information is the first information, and “1” when the second information is the second information.
  • the occurrence time is based on the same standard year / month / day / hour / hour / minute / second as the current time indicated by B24 to B54, the number of seconds elapsed from the reference time is expressed in binary, and the lower 10 bits are assigned MSB first.
  • the 10 bits of B112 to B121 shall be CRC-10.
  • the parity bits generated by using the shortened code (187,105) of the differential cyclic code (273,191) are set in the 82 bits of B122 to B203, similarly to the error correction code of TMCC.
  • the configuration identifications B1 to B3 and the synchronization signals B4 to B16 are not subject to error correction.
  • the information of B17 to B121 is error-correction coded with the shortened code (187,105) of the difference set cyclic code (273,191).
  • the configuration identification is set to the value shown in FIG.
  • the start / end flag is set to “With seismic motion warning detailed information: '00” ”, and at the same time, an update flag, signal identification, seismic motion warning detailed information, and a parity bit are set.
  • the start / end flag is set to “No earthquake motion warning detailed information: '11'”.
  • FIG. 13 shows a TMCC signal configuration (TMCC carrier bit allocation).
  • the TMCC signal is used to transmit information related to the demodulation operation of the receiver, such as a hierarchical configuration and transmission parameters of each OFDM segment.
  • the synchronization signal consists of a 16-bit word.
  • the synchronization signal is used to establish synchronization of the TMCC signal and OFDM frame synchronization.
  • the polarity of the synchronization signal is inverted for each frame. Since the TMCC information is not inverted every frame, pseudo synchronization pull-in can be avoided by inversion every frame.
  • the segment format identification is a signal for identifying whether the segment is a differential modulation unit or a synchronous modulation unit. It is composed of 3 -bit words, and is assigned “111” in the case of the differential modulation unit and “000” in the case of the synchronous modulation unit.
  • the number of TMCC carriers varies depending on the segment format. When the partial reception segment belongs to the synchronous modulation unit, there is only one TMCC carrier. Even in this case, 3 bits are assigned to the identification signal so that reliable decoding is possible, and the inverted signal has the maximum intersymbol distance.
  • TMCC information is information that assists the demodulation and decoding operations of the receiver, such as system identification, transmission parameter switching index, emergency warning broadcast activation flag, current information, and next information.
  • the current information indicates the current layer configuration and transmission parameters, and the next information indicates the transmission parameters after switching.
  • the transmission parameter switching index is counted down to notify the receiver of the switching and take timing.
  • This index usually takes a value of ‘1111’, but when the transmission parameter is switched, 1 is subtracted for each frame from 15 frames before the switching. It should be noted that after “0000”, it returns to “1111”.
  • the switching timing is the next frame synchronization for sending '0000'. That is, the new transmission parameter is applied from the frame returned to ‘1111’.
  • the next information can be set or changed at any time before the switching countdown, but cannot be changed during the countdown.
  • FIG. 15 shows transmission parameter information included in the current / next information. If there is no unused layer or next information in the transmission parameter information, those bits are set to ‘1’.
  • Fig. 16 shows the allocation of emergency warning broadcast activation flags.
  • the activation flag is set to '1' when activation control for the receiver is performed, and the activation flag is set to '0' when activation control is not performed.
  • the partial reception flag is set to “1” when the segment at the center of the transmission band is set for partial reception, and is set to “0” otherwise.
  • segment No. 0 is set for partial reception
  • the hierarchy is defined as the A hierarchy in FIG. If there is no next information, the flag is set to ‘1’.
  • the concatenated transmission phase correction amount is control information used in the terrestrial digital audio broadcasting system with a common transmission system.
  • TMCC information Of the 102 bits of TMCC information, 90 bits are currently defined, but the remaining 12 bits are reserved for future expansion. In operation, all the reserved bits are stuffed with '1'.
  • TMCC information B20 to B121 is error-correction-encoded with a shortened code (184,102) of the difference set cyclic code (273,191).
  • TMCC information requires transmission reliability higher than that of a data signal in order to specify transmission parameters and control a receiver.
  • the error correction code of TMCC is a shortened code of the difference set cyclic code (273,191) ( 184,102). Further, since the TMCC signal is transmitted by a plurality of carriers, it is possible to reduce the required C / N and improve the reception performance by analog addition of the signals.
  • the TMCC signal can be received with a smaller C / N than the data signal.
  • the synchronization signal and the segment format identification information are excluded from the error correction target, and all bits of a plurality of TMCC carriers are made the same to enable majority determination for each bit including parity bits.
  • EWS emergency alert broadcasting
  • the TMCC emergency warning broadcast activation flag is always set to '1' during the period in which emergency warning broadcasting is performed by any service in the TS (network), regardless of the sending layer. .
  • a receiver that supports automatic activation periodically monitors the activation flag for TMCC emergency warning broadcasting.
  • the emergency information descriptor is described in the descriptor area 1 of the PMT of the service that performs the emergency alert broadcast. In order to clearly indicate that an emergency warning broadcast is being performed to an EWS-compatible receiver, the descriptor is always described in the PMT of the emergency warning broadcast service itself.
  • the flag can be set to “1”.
  • the period from when the emergency alert activation flag is set to “0” to “1” is set to 1 second or more and 4 OFDM Frames or more.
  • the operator since the receiver continues the EWS process for 90 seconds after the emergency warning activation flag becomes '0', the operator must change the target area for 90 seconds without changing the EWS.
  • the emergency alarm activation flag must be set to '1'.
  • the emergency information descriptor in the descriptor area 1 in the PMT of the reception TS is monitored.
  • start_end_flag 1 of the emergency information descriptor and area_code corresponds to the area code set in the receiver, the service described in the emergency information descriptor is selected and received.
  • the monitoring of the PMT is continued while the emergency warning broadcast activation flag of TMCC is “1”.
  • the emergency alert broadcast ends when the TMCC emergency alert broadcast activation flag becomes 0 or when the PMT emergency information descriptor is deleted. However, emergency warning broadcasts may be resumed due to the operation of “Changes in description of emergency information descriptor”.
  • the area code set in the receiver may differ from the actual location. Therefore, start operation should be performed regardless of area_code in the above fixed receiver operation (2). However, this does not apply when the receiving area can be specified by other means.
  • Other operations are basically the same as the above fixed receiver operation, but it is also effective to perform a warning operation to the viewer such as blinking the portable receiver as an alternative means of the EWS reception process.
  • FIG. 17 shows the above emergency information descriptor change and receiver operation.
  • the start_end_flag value of the emergency information descriptor is used as the end signal side '0' from the beginning.
  • the descriptor will continue to be described in the PMT.
  • the emergency information descriptor is deleted from the PMT when the TMCC emergency warning broadcast activation flag becomes “0”.
  • the AC carrier in the segment No. 0 is extracted and demodulated, and the transmission of the earthquake motion warning information is confirmed by the configuration identification shown in FIG. 5, and further synchronization is established.
  • the analog motion addition of all AC carriers in segment NO. Demodulation becomes possible. For example, if there are N AC carriers, the amplitude of the seismic motion warning information is N times, whereas the noise is uncorrelated in each AC carrier and therefore does not become N times (in terms of power, the seismic motion warning information Is only N times the square of N).
  • the AC decoding unit 116 checks the configuration identification portion shown in FIG. 5 and confirms that the earthquake motion warning information has been sent to the AC, as described in FIG. Is the same as the TMCC sync signal, so that the analog identification of the code identifying the configuration identification and the sync signal and the TMCC sync signal is added to the TMCC for the above reason. Can also reproduce the synchronization signal with low noise.
  • the 3-bit portion from the beginning of the TMCC synchronization signal and the configuration identification portion shown in FIG. 5 of the AC carrier in the segment No. 0 It is possible to determine that the earthquake motion warning information has been sent to the AC when all three bits are correlated.
  • the channel selection unit 102, the quadrature demodulation unit 103, the FFT unit 104, the synchronous reproduction unit 111, the frame extraction unit 112, and the AC decoding unit 116 are always operating. .
  • the operations of the channel selection unit 102, the quadrature demodulation unit 103, the FFT unit 104, the synchronous reproduction unit 111, and the frame extraction unit 112 perform only the segment No. 0, that is, the one-segment part, when receiving the earthquake motion warning information. Thereby, it can be set as a low power consumption operation
  • the control unit 118 is always operating.
  • the AC carrier in the segment No. 0 is extracted and demodulated by the AC decoding unit 116, and the seismic motion warning information start / end flag shown in FIG. 5 is monitored in the sense shown in FIG. When not reported, the state of switching from “no earthquake motion warning information” to “with earthquake motion warning information” is monitored.
  • the discriminating unit 117 is in a stopped state at an initial stage, that is, a stage where the earthquake motion warning information is not issued (the earthquake motion warning information start / end flag is “no earthquake motion warning information”).
  • the demodulation / decoding unit 105, the descrambling unit 106, the demax unit 107, the decoding unit 108, the switching units 114 and 115, the video output unit 109, and the audio output unit 110 are stopped. It is in a state.
  • the TMCC decoding unit 113 is always operating when trying to receive an emergency alert broadcast, and monitors the emergency alert broadcast activation flag shown in FIG.
  • the channel selection unit 102, the quadrature demodulation unit 103, the FFT unit 104, the synchronous reproduction unit 111, and the frame extraction unit 112 are always operating.
  • the operations of the channel selection unit 102, the quadrature demodulation unit 103, the FFT unit 104, the synchronous reproduction unit 111, and the frame extraction unit 112 need only be performed for the segment No. 0, that is, only the one-segment part when receiving an emergency warning broadcast. . Thereby, it can be set as a low power consumption operation
  • the AC decoding unit 116 starts from “no seismic motion warning detailed information”. A state of switching to “with detailed earthquake motion warning information” is detected, and the control unit 118 is notified of “with detailed earthquake motion warning information”, that is, information with which earthquake motion warning information has been issued.
  • the control unit 118 sends a control signal that causes the determination unit 117 to be in a normal state and the broadcast reception unit 119 to be in a standby state.
  • the AC decoding unit 116 extracts and confirms the seismic motion warning information start / end flag, the seismic motion warning information update flag, the identification flag shown in FIG. 5 when the seismic motion warning information start / end flag becomes “earthquake motion warning detailed information available”.
  • the signal, details of earthquake motion warning information, CRC-10, and parity bit data are output to the determination unit 117.
  • the determination unit 117 that has entered the normal state receives the data from the AC decoding unit 116, performs error correction of the shortened code of the difference set cyclic code, performs CRC-10 error detection, and then performs signal identification shown in FIG. The meaning is confirmed and the meaning shown in FIG. 9 is determined. Then, predetermined processing is performed according to each meaning, and the discrimination information is sent to the control unit 118.
  • the control unit 118 Based on the discrimination information from the discrimination unit 117, the control unit 118 changes the broadcast reception unit 119 that has been in the standby state from the standby state to the normal state when the identification signal is “detailed information on earthquake motion warning (with applicable area)”.
  • the switching units 114 and 115 are controlled so as to select a signal from the determination unit 117.
  • the video signal and the audio signal indicating the detailed information on the seismic motion warning from the determination unit 117 are output to the video output unit 109 and the audio output unit 110, respectively, and the seismic motion warning is performed.
  • the broadcast receiving unit 119 is controlled to be in the standby state.
  • the switching units 114 and 115, the video output unit 109, and the audio output unit 110 may be controlled to be in the standby state.
  • the above shows an example in which the broadcast receiving unit 119 is controlled from the standby state to the normal state
  • the switching units 114 and 115, the video output unit 109, and the audio output unit 110 are normally changed from the broadcast receiving unit 119 in the standby state.
  • the standby state switching units 114 and 115, the video output unit 109, and the audio output unit 110 may be controlled to be in a normal state.
  • the normal state represents a state that is operating normally, the standby state is not operating, but the state can be immediately shifted to the normal state, and the stopped state is not operating.
  • the standby state of the broadcast receiving unit 119, the switching units 114 and 115, the video output unit 109, and the audio output unit 110 refers to energization so that video output or audio output can be performed quickly when the normal state is reached.
  • the discriminating unit 117 confirms the signal identification shown in FIG. 5 and discriminates the meaning shown in FIG. 9.
  • the identification signal is “Earthquake motion warning detailed information (with corresponding area)”
  • a buzzer sound or voice A warning by flashing light or a display is displayed.
  • the discriminating unit 117 outputs the earthquake detailed information and time information such as the prefecture information and the epicenter information where strong shaking is expected as shown in FIG. 10, FIG. 11 and FIG. Or count down to the time when the earthquake is expected to occur.
  • the control unit 118 controls the broadcast receiving unit 119 that has been in the standby state from the standby state to the normal state, and controls the switching units 114 and 115 to select the signal from the determination unit 117.
  • the video signal and the audio signal indicating the detailed information on the seismic motion warning from the determination unit 117 are output to the video output unit 109 and the audio output unit 110, respectively, and the seismic motion warning is performed.
  • the discriminating unit 117 discriminates “earthquake motion warning detailed information (no corresponding area)”, the video output unit 109 and the audio output unit 110 are not output. However, depending on the case, the same operation as “there is a corresponding area” is performed, and the video output unit 109 displays earthquake detailed information such as prefecture information and epicenter information expected to be strongly shaken, or the audio output unit 110. You may make it output by voice.
  • the discriminating unit 117 discriminates the “test signal for detailed earthquake motion warning information (with relevant area)” or “the test signal for detailed earthquake motion warning information (without relevant region)”, this is generally performed by the seismic motion warning information receiving unit 120. This is effective when the operation is confirmed in the test mode, ignored in the normal operation mode, and is not output to the video output unit 109 or the audio output unit 110. In the test mode, for example, video information or audio indicating that the mode is the test mode for each operation of “seismic motion warning detailed information (with corresponding area)” or “earthquake motion warning detailed information (without corresponding area)”. Multiplex information.
  • the discriminating unit 117 always needs to check the signal identification when the earthquake motion warning information start / end flag is “detailed information on earthquake motion warning”, but at least when the state of the earthquake motion warning information update flag changes, the signal identification is always performed. Confirm.
  • the AC decoding unit 116 monitors the state where the earthquake motion warning information start / end flag is switched from “with detailed earthquake motion warning information” to “without detailed earthquake motion warning information”, and the earthquake motion warning information start / end flag is “ In the case of “No detailed earthquake motion warning information”, information “No detailed earthquake motion warning information” is transmitted to the control unit 118.
  • the control unit 118 sends a signal that causes the determination unit 117 to stop.
  • the determination unit 117 receives this and enters a stop state.
  • the control unit 118 sends a control signal to the broadcast receiving unit 119.
  • the broadcast receiving unit 119 receives this signal, keeps the broadcast receiving unit 119 in a normal state for a certain period of time, and switches the switching units 114 and 115 to the decoding unit 108 side. At that time, the decoded broadcast video signal from the digital broadcast decoding unit 108 received by the channel selection unit 102 is output to the video output unit 109 and the decoded broadcast audio signal is output to the audio output unit 110 for a predetermined time. After the elapse, the broadcast receiving unit 119 is brought into a stopped state. On the other hand, the control unit 118 controls the AC decoding unit 116 to stop data output from the AC decoding unit 116 to the determination unit 117.
  • the stop state of the broadcast receiving unit 119 means that the channel selection unit 102, the orthogonal demodulation unit 103, the FFT unit 104, the synchronous reproduction unit 111, and the frame extraction unit 112 are in one-segment operation, and the demodulation / decoding unit 105, the descrambling unit 106, the demax unit 107, the decoding unit 108, the switching units 114 and 115, the video output unit 109, and the audio output unit 110 are not operating.
  • the standby state of the broadcast receiving unit 119 means that the channel selection unit 102, the quadrature demodulation unit 103, the FFT unit 104, the synchronous reproduction unit 111, and the frame extraction unit 112 operate in the 13-segment full band, and the demodulation / decoding unit 105, the descrambling unit 106, the demax unit 107, and the decoding unit 108 are operating, and the switching units 114 and 115, the video output unit 109, and the audio output unit 110 are not operating.
  • the normal state of the broadcast receiving unit 119 is that the channel selection unit 102, the quadrature demodulation unit 103, the FFT unit 104, the synchronous reproduction unit 111, and the frame extraction unit 112 operate in the 13-segment full band, and the demodulation / decoding unit 105, the descrambling unit 106, the demax unit 107, and the decoding unit 108 are operating, and the switching units 114 and 115, the video output unit 109, and the audio output unit 110 are operating.
  • TMCC decoding unit 113 is always operating.
  • the above description is based on the assumption that the digital broadcast receiving apparatus 121 is not operating. However, the digital broadcast receiving apparatus 121 is operating, that is, the broadcast receiving unit 119 was originally in a normal state. Sometimes, the following operations are performed.
  • the AC decoding unit 116 detects a state of switching from “earthquake motion warning detailed information” to “earthquake motion warning detailed information present”, By the control signal, “there is detailed earthquake motion warning information”, that is, information on which the earthquake motion warning information is issued is transmitted to the control unit 118.
  • the control unit 118 sends a control signal that causes the determination unit 117 to be in a normal state.
  • the control unit 118 sends a control signal to the broadcast receiving unit 119, and the broadcast receiving unit 119 receives the control signal.
  • the switching unit 114, 115 receives the signal from the decoded broadcast video signal from the decoding unit 108.
  • the AC decoding unit 116 detects and confirms the earthquake motion warning information start / end flag and the earthquake motion warning information update flag shown in FIG.
  • the identification signal, details of earthquake motion warning information, CRC-10, and parity bit data are output to the determination unit 117.
  • the discriminating unit 117 which is in the normal state by the control signal, receives the data from the AC decoding unit 116, performs error correction of the shortened code of the difference set cyclic code, performs CRC-10 error detection, and then shows the result shown in FIG. The signal identification is confirmed, and the meaning shown in FIG. 9 is determined. Then, predetermined processing is performed according to each meaning, and the discrimination information is sent to the control unit 118.
  • the control unit 118 controls the switching units 114 and 115 to select the signal from the discrimination unit 117 when the identification signal is “seismic motion warning detailed information (with applicable area)”. To do.
  • the video signal and the audio signal indicating the detailed information on the seismic motion warning from the determination unit 117 are output to the video output unit 109 and the audio output unit 110, respectively, and the seismic motion warning is performed.
  • the AC decoding unit 116 monitors the state of switching from the earthquake motion warning information start / end flag “with detailed earthquake motion warning information” to “no detailed earthquake motion warning information”, and the earthquake motion warning information start / end flag is set to “earthquake motion warning information”.
  • the control unit 118 is notified of “no detailed earthquake alarm information”.
  • the control unit 118 sends a signal that causes the determination unit 117 to stop.
  • the determination unit 117 receives this and enters a stop state.
  • control unit 118 sends a control signal to the broadcast receiving unit 119, and the broadcast receiving unit 119 receives this signal, and the switching unit 114 and 115 respectively decode the video signal from the determination unit 117 from the decoding unit 108. Switching to the broadcast video signal is performed from the audio signal from the determination unit 117 to the decoded broadcast audio signal from the decoding unit 108.
  • control unit 118 controls the AC decoding unit 116 to stop data output from the AC decoding unit 116 to the determination unit 117.
  • the switching units 114 and 115 are used to switch from the broadcast video signal or broadcast audio signal of normal television broadcasting to the video signal or audio signal of the earthquake motion warning information.
  • the switching units 114 and 115 are used to switch from the broadcast video signal or broadcast audio signal of normal television broadcasting to the video signal or audio signal of the earthquake motion warning information.
  • the control unit 118 receives the emergency warning broadcast activation flag information from the TMCC decoding unit 113 and the seismic motion warning information from the seismic motion warning information receiving unit 120, and controls the switching units 114 and 115 when the seismic motion warning should be issued. Then, the video signal for the earthquake motion warning is output to the video output unit 109, and the audio signal for the earthquake motion warning is output to the audio output unit 110.
  • FIG. 18 shows the transmission operation timing of the start / end flag of the earthquake motion warning information sent by the AC signal and the emergency warning broadcast start flag sent by the TMCC signal.
  • the start / end flag is “Earthquake alarm detailed information available: '00” ”, even if it is necessary to carry out emergency alarm broadcasting during the period of“ 00 ”, During the period of '00', the start flag is not set to “with start control: ON”, and the start / end flag is set to “no earthquake motion warning detailed information: '11” ”and the start flag is set to“ with start control: Set to "ON”.
  • the receiving operation of both the seismic motion warning and the emergency warning broadcast overlaps the digital broadcasting receiving device that supports both the seismic motion warning and the emergency warning broadcasting, and the receiving operation of the seismic motion warning and the emergency warning broadcast each other. It is possible to prevent a reception failure from occurring and an output of earthquake motion warning information from being hindered.
  • the receiver operation at this time will be described.
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the startup flag is “No startup control: OFF”
  • the receiver is in normal operation
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • the startup flag is “No startup control: OFF”
  • the receiver is in normal operation
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the startup flag is “No startup control: OFF”
  • the receiver is in normal operation (4)
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the startup flag is “Startup control available: ON” In case of, the receiver supports emergency alert broadcasting (5)
  • the start / end flag is "No detailed earthquake alarm information: '11'”
  • the startup flag is "No startup control: OFF” In the case of, the receiver returns to normal operation.
  • the emergency warning broadcast activation flag is“ with activation control: Since “ON” does not transmit due to overlapping, there is an effect that the receiver can respond to the seismic motion warning operation and the emergency warning broadcast without being hindered.
  • FIG. 19 shows the start / end flag of the earthquake motion warning information sent by the AC signal, the signal identification, and the transmission operation timing of the emergency warning broadcast start flag sent by the TMCC signal.
  • the start / end flag is “Earthquake motion warning detailed information: '00” ”and the signal identification is“ Earthquake motion warning detailed information (with applicable area): “000” ”. Even if it is necessary to carry out emergency warning broadcasting during the period of '00' and '000', the start flag is not set to "with start control: ON" during the period of '00' and '000'.
  • the start flag is activated. Controlled: Set to ON. In this way, the receiving operation of both the seismic motion warning and the emergency warning broadcast overlaps the digital broadcasting receiving device that supports both the seismic motion warning and the emergency warning broadcasting, and the receiving operation of the seismic motion warning and the emergency warning broadcast each other. It is possible to prevent a reception failure from occurring and an output of earthquake motion warning information from being hindered.
  • the receiver operation at this time will be described.
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag is “No startup control: OFF”
  • the receiver is in normal operation
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (with applicable area): '000” ”
  • the startup flag is “No startup control: OFF”
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is "No detailed earthquake alarm information: '111'”
  • the startup flag is "No startup control: OFF”
  • the receiver is in normal operation (4)
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag
  • the emergency alarm broadcast activation flag is“ Activated ”. Controlled: ON "is not transmitted because it overlaps, so there is an effect that the receiver can respond to the seismic motion warning operation and the emergency warning broadcast without being hindered.
  • FIG. 20 shows the start / end flag of earthquake motion warning information sent by an AC signal, signal identification, and transmission operation timing of an emergency warning broadcast start flag sent by a TMCC signal.
  • the start / end flag is “earthquake motion warning detailed information:“ 00 ”” and the signal identification is “earthquake motion warning detailed information (no corresponding area):“ 001 ”, then“ If it becomes necessary to carry out emergency warning broadcasting during the period of 00 ', 001', it will not prevent the activation flag from being "with startup control: ON" during the period of '00', '001'. . By doing in this way, there exists an effect which can broadcast emergency alert broadcast immediately. Even when the signal identification is “Earthquake motion warning detailed information test broadcast (no applicable area): '011” ”, the operation is performed with the signal identification“ Earthquake alarm detailed information (no applicable area):' 001 ””.
  • the signal identification is “Earthquake motion warning detailed information test broadcast (no applicable area
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag is "No startup control: OFF”
  • the receiver is in normal operation
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (no applicable area): '001” ”
  • the startup flag is "No startup control: OFF”
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (no applicable area): '001” ”
  • the startup flag is "Startup control available: ON”
  • the start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (no applicable area
  • the start / end flag is “earthquake motion warning detailed information: '00” ”and the signal identification is“ earthquake motion warning detailed information (no applicable area): “ In the case of 001 '", since it is not a corresponding area of the earthquake motion warning, there is an effect that the emergency warning broadcast can be performed with priority over the earthquake motion warning operation.
  • the receiver Since the receiver is a test broadcast, it will not respond in normal operation, but during maintenance such as in the receiver test mode, it will indicate that it is a test broadcast and the signal identification will be "Earthquake motion warning detailed information (with applicable areas): '000" In case of “”, follow the receiver operation when the signal identification is “Earthquake alarm detailed information (no applicable area):“ 001 ””.
  • the control unit 118 receives the emergency warning broadcast activation flag information from the TMCC decoding unit 113 and the seismic motion warning information from the seismic motion warning information receiving unit 120, and controls the switching units 114 and 115 when the seismic motion warning should be issued. Then, the video signal for the earthquake motion warning is output to the video output unit 109, and the audio signal for the earthquake motion warning is output to the audio output unit 110. The operation will be described below.
  • FIG. 21 shows the start / end flag and signal identification of the earthquake motion warning information sent by the AC signal, the transmission operation timing of the emergency warning broadcast start flag sent by the TMCC signal, and the receiving operation thereof.
  • the start / end flag is “Earthquake alarm detailed information:“ 11 ”” and the emergency warning broadcast starts and the activation flag is “with activation control: ON”, If it is necessary to issue a seismic motion warning during a period with start control, even if the start flag is "Start control: ON”, the start / end flag is set to "With detailed seismic alarm information: '00'" Start operation of earthquake alarm. The receiver operation at this time will be described.
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag is "No startup control: OFF”
  • the receiver is in normal operation
  • the start / end flag is "No detailed earthquake alarm information: '11'”
  • the signal identification is "No detailed earthquake alarm information: '111'”
  • the startup flag is "Startup control available: ON” In case of, the receiver supports emergency alert broadcasting (3)
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (with applicable area): '000” ”
  • the startup flag is “Startup control available: ON” In the case of, the receiver gives priority to seismic motion warning (4)
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag is “Star
  • the earthquake motion warning operation has priority over the emergency warning broadcast. Because it is implemented, the emergency warning broadcast has the effect of not preventing the earthquake motion warning.
  • the earthquake alarm is activated from the emergency alarm broadcast. Because it is prioritized, emergency alert broadcasting has the effect of not preventing information output in the area of the earthquake motion warning from being affected.
  • FIG. 22 shows the start / end flag and signal identification of the seismic motion warning information sent by the AC signal, the transmission operation timing of the emergency warning broadcast activation flag sent by the TMCC signal, and the receiving operation thereof.
  • the emergency warning broadcast starts and the activation flag is “with activation control: ON” during the period when the start / end flag is “No detailed earthquake motion warning information: '11” ”, If it is necessary to issue a seismic motion warning during a period with start control, even if the start flag is "Start control: ON”, the start / end flag is set to "With detailed seismic alarm information: '00'" Start operation of earthquake alarm.
  • the receiver operation when the signal identification is “detailed information on earthquake motion warning (no corresponding area): '001” ” will be described.
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is "No detailed earthquake alarm information: '111'”
  • the startup flag is "No startup control: OFF”
  • the receiver is in normal operation
  • the start / end flag is "No detailed earthquake alarm information: '11'”
  • the signal identification is "No detailed earthquake alarm information: '111'”
  • the startup flag is “Startup control available: ON”
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (no applicable area): '001” ”
  • the startup flag is “Startup control available: ON”
  • the receiver will continue to broadcast the emergency alert (4)
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the start / end flag is “earthquake motion warning detailed information: '00” ”and the signal identification is“ earthquake motion warning detailed information (no applicable area): “ In the case of 001 '", since it is not a corresponding area of the earthquake motion warning, there is an effect that the emergency warning broadcast can be performed with priority over the earthquake motion warning operation.
  • FIG. 23 shows the start / end flag and signal identification of the earthquake motion warning information sent by the AC signal, the transmission operation timing of the emergency warning broadcast activation flag sent by the TMCC signal, and the reception operation thereof.
  • the start flag is “No start control: OFF”
  • the seismic motion warning is issued and the start / end flag is “Earthquake motion warning detailed information: '00” ”.
  • the operation of the receiver when the emergency warning broadcast needs to be started during the period with the detailed earthquake motion warning information and the transmission operation with the activation flag “with activation control: ON” during that period is permitted will be described.
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag is "No startup control: OFF”
  • the receiver is in normal operation
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (with applicable area): '000” ”
  • the startup flag is “No startup control: OFF” In case of, the receiver supports the earthquake motion warning operation
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (with applicable area): '000” ”
  • the startup flag is “Startup control available: ON”
  • the receiver continues the seismic motion warning operation (4)
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the earthquake motion warning operation has priority over the emergency warning broadcast. Because it is implemented, the emergency warning broadcast has the effect of not preventing the earthquake motion warning.
  • the earthquake alarm is activated from the emergency alarm broadcast. Because it is prioritized, emergency alert broadcasting has the effect of not preventing information output in the area of the earthquake motion warning from being affected.
  • FIG. 24 shows the start / end flag and signal identification of the earthquake motion warning information sent by the AC signal, the transmission operation timing of the emergency warning broadcast start flag sent by the TMCC signal, and the reception operation thereof.
  • an earthquake motion warning is issued in the period when the activation flag is “no activation control: OFF”, and the start / end flag is “detailed information on earthquake motion alarm: '00” ”and the signal identification is“ earthquake motion alarm ”.
  • Detailed information no applicable area: When “001” is set, if it is necessary to start emergency alert broadcasting during that period, the operation flag for that period is “with start control: ON”. The operation of the receiver when permitted is described.
  • the start / end flag is “No detailed earthquake alarm information: '11” ”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag is "No startup control: OFF”
  • the receiver is in normal operation
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (no applicable area): '001” ”
  • the startup flag is "No startup control: OFF”
  • Start / end flag is “Earthquake alarm detailed information available: '00” ”
  • Signal identification is “Seismic motion warning detailed information (no applicable area): '001” ”
  • the startup flag is “Startup control available: ON”
  • the receiver supports emergency alert broadcasting (4)
  • the start / end flag is “No detailed earthquake alarm information: '11”
  • the signal identification is “No detailed earthquake alarm information: '111'”
  • the startup flag
  • the start / end flag is “earthquake motion warning detailed information: '00” ”and the signal identification is“ earthquake motion warning detailed information (no applicable area): “ In the case of 001 '", since it is not a corresponding area of the earthquake motion warning, there is an effect that the emergency warning broadcast can be performed with priority over the earthquake motion warning operation.
  • the receiver Since the receiver is a test broadcast, it will not respond in normal operation, but during maintenance such as in the receiver test mode, it will indicate that it is a test broadcast and the signal identification will be "Earthquake motion warning detailed information (with applicable areas): '000" In case of “”, follow the receiver operation when the signal identification is “Earthquake alarm detailed information (no applicable area):“ 001 ””.
  • 2501 is an input of data from the AC decoding unit 116
  • 2502 is an error correction detection unit
  • 2503 is an input of a control signal from the control unit 118
  • 2504 is a clock unit
  • 2505 is a current time setting unit
  • 2506 is a data judgment storage unit
  • 2508 is a buzzer sound generation unit
  • 2509 is a processing unit
  • 2510 is a video signal output
  • 2511 is an audio signal output
  • 2512 is an output of determination information to the control unit 118.
  • the clock unit 2504 always operates even when the discriminating unit 117 is stopped, and indicates an accurate time.
  • GPS Global Positioning System
  • use of a radio clock function that automatically corrects errors by receiving standard radio waves use of a function that automatically updates the correct time from the outside, such as the Internet, etc.
  • the current time setting unit 2505, the data determination storage unit 2506, the comparison determination unit 2507, the buzzer sound generation unit 2508, and the processing unit 2509 operate when the determination unit 117 is in the “standby state” and “normal state” and is in the “stop state”. It does not work when.
  • the current time setting unit 2505 always extracts and sets the current time from the clock unit 2504.
  • the AC decoding unit 116 determines that the earthquake motion warning information start / end flag “there is detailed earthquake motion warning information”
  • the AC decoding unit 116 sends the information “there is detailed earthquake motion warning information” to the control unit 118.
  • the control unit 118 sends a control signal for making the determination unit 117 from the stopped state to the normal state via the input 2503. Thereafter, the seismic motion warning information start / end flag and the seismic motion warning information update flag shown in FIG.
  • the error correction detection unit 2502 performs error correction of the shortened code of the differential cyclic code, and then performs CRC-10 error detection.
  • the data from the AC decoding unit 116 is confirmed by the data determination storage unit 2506 for the signal identification shown in FIG. 5 to determine the meaning shown in FIG. In the case of “There is a corresponding area”, the information shown in FIGS. 10, 11, and 12 is stored.
  • the time information is stored and simultaneously compared with the current time of the current time setting unit 2505 by the comparison determination unit 2507.
  • the sent time information in the data judgment storage unit 2506 is the current time information of the broadcasting station when the broadcasting station transmits, and has a predetermined accuracy.
  • the comparison determination unit 2507 controls the buzzer sound generation unit 2508 to generate a buzzer sound when it is determined that “the area is present” and “normal”. As a result, it is possible to accumulate broadcast waves when earthquake motion warning information has been issued in the past (hereinafter referred to as RF capture). Has time information at the time of RF capture, the current time of the current time setting unit 2505 exceeds the threshold value, and the comparison determination unit 2507 determines that it is “abnormal” and does not generate a buzzer sound. There is an effect that it is possible to prevent a malfunction in which a buzzer sound is generated by the buzzer sound generator 2508. Instead of the buzzer sound generating unit 2508, a warning may be generated by voice or a warning display by flashing light.
  • the judgment information of the comparison judgment unit 2507 is sent to the processing unit 2509 and also sent to the control unit 118 via the output 2512.
  • the processing unit 2509 stores time information, detailed earthquake information such as prefecture information and epicenter information in the data determination storage unit 2506, and at the same time, prepares output from the video signal output 2510 and prepares output from the audio signal output 2511. I do. For example, although not shown in FIG. 25, the time until the arrival of the earthquake is calculated from the installation location of the digital broadcast receiving apparatus stored in advance and the detailed earthquake information.
  • An output signal is output from the video signal output 2510 and the audio signal output 2511 only in the “normal state”.
  • the video signal output 2510 and the audio signal output 2511 receive the signal from the processing unit 2509 and output the video signal output and the audio signal output of the earthquake motion warning information, respectively.
  • To do. 11 and 12 are detailed earthquake information and time information such as prefectural information and epicenter information where strong shaking is expected, or countdown information until a time when an earthquake is expected to occur.
  • the AC decoding unit 116 monitors the state of switching from the earthquake motion warning information start / end flag “with detailed earthquake motion warning information” to “no detailed earthquake motion warning information”, and the earthquake motion warning information start / end flag is set to “detailed information about earthquake motion warning”.
  • the control unit 118 is notified of the information “No detailed seismic motion warning information”, the control unit 118 sends a signal for stopping the discriminating unit 117, and the discriminating unit 117 is connected via the input 2503. In response to this, it enters a stop state. That is, except for the clock unit 2504, all blocks stop operating.
  • Embodiment 2 according to the present invention will be described with reference to FIGS.
  • FIG. 26 is a block diagram showing a configuration of a digital broadcast receiving apparatus that receives earthquake motion warning information transmitted using an AC signal included in segment number # 0 transmitted by the digital broadcast transmitting apparatus of FIG.
  • Reference numerals 2601 and 2602 denote synthesizing units, and details thereof are shown in FIG.
  • FIG. 1 The difference between FIG. 1 and FIG. 26 is that the switching units 114 and 115 are replaced by combining units 2601 and 2602, respectively.
  • FIG. 27 also shows the decoding unit 108 in detail.
  • 2701 is an input of a compressed program video signal, a compressed program audio signal, and a digital signal of a data signal from the descrambling unit 106
  • 2703 is a moving picture and a still image for the compressed program video signal and the video data signal.
  • 2704 is an audio decoding unit that performs decoding on the compressed program audio signal and audio data signal
  • 2705 displays a moving image.
  • Character graphic plane display memory for displaying character graphic 2709 is a subtitle plane display memo for displaying subtitles 2710 is a switching unit that switches the moving image from the moving image plane display memory 2705 and the still image from the still image plane display memory 2706 for each pixel based on information in the moving image still image switching plane display memory 2707, and 2711 is an output of the switching unit 2710.
  • An adjustment unit that adjusts the synthesis ratio of the signal 2712 is an adjustment unit that adjusts the synthesis ratio of the output signal of the character / graphic plane display memory 2708, 2713 is an addition unit that synthesizes the output signals of the adjustment units 2711 and 2712, and 2714 is an addition unit.
  • 2713 is an adjusting unit that adjusts the combining ratio of the output signals 2713, 2715 is an adjusting unit that adjusts the combining ratio of the output signals of the subtitle plane display memory 2709, and 2716 is an adding unit that combines the output signals of the adjusting units 2714 and 2715.
  • the decoding unit 108 is configured as described above.
  • the adder 2716 outputs a broadcast video signal
  • the audio system decoder 2704 outputs a broadcast audio signal.
  • 2717 is data input from the AC decoding unit 116.
  • Reference numeral 2718 denotes an adjustment unit that adjusts the composite ratio of the broadcast video signal that is the output signal of the adder 2716
  • 2719 denotes an adjustment unit that adjusts the composite ratio of the video signal of the earthquake motion warning information that is the output signal of the determination unit 117
  • 2720 denotes an adjustment.
  • An adder that synthesizes the output signals of the units 2718 and 2719, and 2721 is an output of a synthesized video signal that is an output signal of the adder 2720, and constitutes a synthesizer 2601.
  • Reference numeral 2722 denotes an adjustment unit that adjusts the synthesis ratio of the broadcast audio signal that is an output signal of the audio system decoding unit 2704;
  • 2723 an adjustment unit that adjusts the synthesis ratio of the audio signal of the earthquake motion warning information that is the output signal of the determination unit 117;
  • Is an adding unit that synthesizes the output signals of the adjusting units 2722 and 2723, and 2725 is an output of a synthesized speech signal that is an output signal of the adding unit 2724, and constitutes the synthesizing unit 2602.
  • the TS signal scrambled for copyright protection is descrambled by the descrambling unit 106 and input from the input 2701 to the demax unit 107.
  • the demux unit 107 extracts a desired compressed program video signal, compressed program audio signal, and data signal, and outputs them to the decoding unit 108.
  • the desired compressed program video signal and video data signal are input to the video decoder 2703, and the desired compressed program audio signal and audio data signal are input to the audio decoder 2704. .
  • the desired compressed program video signal and video data signal and the desired compressed program audio signal and audio data signal are converted into character graphics, still images, and moving images by a data stream or a data carousel. Transmission is performed as monophonic audio media. These data are decoded and separated into individual encoded monomedia data.
  • Encoded monomedia data is decoded by each decoder.
  • Audio is decoded by audio system decoding
  • video signal is decoded by video
  • character / figure / still image is decoded by character / figure / still image decoding
  • subtitle / character super is decoded by subtitle / character super decoding.
  • the character graphic, still image, and moving image are displayed by the character graphic plane display memory 2708, the still image plane display memory 2706, and the moving image plane display memory 2705, respectively, and the moving image still image switching plane display memory 2707 is displayed.
  • the synthesis is performed under the control. Note that scaling may be performed when displaying on each plane.
  • presentation control of these mono media is controlled by a framework defined by multimedia coding. Further, the caption super is displayed on the caption plane display memory 2709 by the encoding method of caption and character super, and the presentation control is performed.
  • the switching unit 2710 switches the moving image from the moving image plane display memory 2705 and the still image from the still image plane display memory 2706 for each pixel based on information in the moving image still image switching plane display memory 2707.
  • the output signal of the switching unit 2710 is adjusted by the adjustment unit 2711 to be “1 ⁇ 1” times the composition ratio.
  • the character graphic that is an output signal from the character graphic plane display memory 2708 is adjusted by the adjustment unit 2712 to the composition ratio “ ⁇ 1” times.
  • ⁇ 1 represents opacity and takes a value from 0 to 1.
  • the adder 2713 combines the output signals of the adjusters 2711 and 2712. When ⁇ 1 is 0, only the output signal of the switching unit 2710 is obtained, and when ⁇ 1 is 1, only the character graphic that is an output signal from the character graphic plane display memory 2708 is obtained.
  • the output signal of the addition unit 2713 is adjusted by the adjustment unit 2714 to be “1 ⁇ 2” times the composition ratio.
  • the subtitle which is the output signal from the subtitle plane display memory 2709 is adjusted by the adjusting unit 2715 to the composition ratio “ ⁇ 2” times.
  • ⁇ 2 represents opacity and takes a value from 0 to 1.
  • An adder 2716 combines the output signals of the adjusters 2714 and 2715. When ⁇ 2 is 0, only the output signal of the adder 2713 is provided, and when ⁇ 2 is 1, only the caption that is an output signal from the caption plane display memory 2709 is provided.
  • subtitles, character figures, still images, and moving images are combined, and a broadcast video signal is output from the adder 2716.
  • the broadcast video signal from the adding unit 2716 is adjusted by the adjusting unit 2718 to the synthesis ratio “1 ⁇ 3” times, while the video signal of the earthquake motion warning information which is the output signal from the determining unit 117 is adjusted.
  • the combination ratio is adjusted to " ⁇ 3" times, the output signals of the adjustment units 2718 and 2719 are combined in the addition unit 2720, and the output signal of the addition unit 2720 is output to the output 2721 as a composite video signal.
  • ⁇ 3 represents opacity and takes a value from 0 to 1.
  • the combined video signal output from the output 2721 is only the broadcast video signal from the adder 2716, and ⁇ 3 is 1.
  • the combined video signal output from the output 2721 is only the video signal of the earthquake motion warning information that is the output signal from the determination unit 117.
  • the broadcast audio signal from the audio system decoding unit 2704 is adjusted by the adjustment unit 2722 to the synthesis ratio “1 ⁇ 4” times, while the audio signal of the earthquake motion warning information that is the output signal from the determination unit 117 is received.
  • the adjustment unit 2723 adjusts the combination ratio to “ ⁇ 4” times, the output signals of the adjustment units 2722 and 2723 are combined by the addition unit 2724, and the output signal of the addition unit 2724 is output to the output 2725 as a synthesized speech signal.
  • ⁇ 4 represents a synthesis rate, and takes a value from 0 to 1.
  • the synthesized audio signal output from the output 2725 is only the broadcast audio signal from the audio decoding unit 2704, and ⁇ 4 is In the case of 1, the synthesized voice signal output from the output 2725 is only the voice signal of the earthquake motion warning information that is the output signal from the determination unit 117.
  • the discriminating unit 117 uses the character font information and other display information of the decoding unit 108 when creating a video signal of earthquake motion warning information, or the decoding unit 108 when creating an audio signal of earthquake motion warning information.
  • the buzzer sound type information possessed by the digital broadcast receiver 121 it is possible to have a circuit configuration that does not require the digital broadcast receiving apparatus 121 to have duplicate information. In this case, the low-cost determination unit 117 is used. There is an effect that can be.
  • the control unit 118 in FIGS. 18, 19, 20, 21, 22, 23, and 24 also includes emergency warning broadcast activation flag information from the TMCC decoding unit 113,
  • the synthesis units 2601 and 2602 are controlled, and the seismic motion warning video signal is sent to the video output unit 109 and the seismic motion warning audio signal. Can be output to the audio output unit 110.
  • Embodiment 3 according to the present invention will be described with reference to FIG.
  • the subtitle plane display memory 2709 updates the video signal of the seismic motion warning information from the determination unit 117 after updating the decoded subtitle from the video system decoding unit 2703. Alternatively, the subtitle plane display memory 2709 does not write the decoded subtitle from the video system decoding unit 2703 at the place where the video signal of the earthquake motion warning information from the determination unit 117 is written. Also, ⁇ 2 is set to a value larger than 0.5.
  • the video signal of the earthquake motion warning information when a caption is displayed in the caption plane display memory 2709, it is possible to display the video signal of the earthquake motion warning information by avoiding the display portion.
  • the image signal of the earthquake motion warning information can be displayed by avoiding the display portion.
  • the discriminating unit 117 uses the character font information and other display information of the decoding unit 108 when creating a video signal of earthquake motion warning information, or the decoding unit 108 when creating an audio signal of earthquake motion warning information.
  • the buzzer sound type information possessed by the digital broadcast receiver 121 it is possible to have a circuit configuration that does not require the digital broadcast receiving apparatus 121 to have duplicate information. In this case, the low-cost determination unit 117 is used. There is an effect that can be.
  • Embodiment 4 according to the present invention will be described with reference to FIGS. 29 and 30.
  • FIG. 29 is a diagrammatic representation of Embodiment 4 according to the present invention.
  • FIG. 29 is a block diagram showing a configuration of a digital broadcast receiving apparatus that receives earthquake motion warning information transmitted using an AC signal included in segment number # 0 transmitted by the digital broadcast transmitting apparatus of FIG.
  • FIG. 2901 is an output unit for earthquake motion warning information
  • FIG. 30 shows a block diagram of the configuration.
  • FIG. 1 The difference between FIG. 1 and FIG. 29 is that the output 2901 of the earthquake motion warning information is separated from the video output unit 109 and the audio output unit 110 which are output parts of the broadcast receiving unit 119.
  • the video signal output from the video signal output 2510 of the earthquake motion warning information from the processing unit 2509 described in FIG. 25 and the audio signal output from the audio signal output 2511 are respectively output to the video output unit 3001.
  • the audio output unit 3002 is used for output.
  • the video output unit 3001 may be a video display such as a flash device that blinks light or a video display using a simple video display device such as a 7-segment display.
  • the video output unit 109 of the broadcast receiving unit 119 outputs the video signal and the audio signal indicating the detailed information on the earthquake motion warning from the discriminating unit 117 using the video output unit 3001 and the audio output unit 3002, respectively. Control is performed so that the output from the audio output unit 110 does not interfere with the video signal and audio signal indicating the earthquake motion warning detailed information output from the video output unit 3001 and the audio output unit 3002. Specifically, the video of the video output unit 109 is darkened, made into a still image, a message indicating that seismic motion warning detailed information has been issued, and the audio of the audio output unit 110 is muted (not output) ), Reduce the volume, etc.
  • the video signal and the audio signal of the earthquake motion warning information can be made more conspicuous than the broadcast video signal and the broadcast audio signal, respectively.
  • it since it has a video output unit and audio output unit independent of the broadcast receiving unit, even if the video output unit and audio output unit of the broadcast receiving unit are not outputting, it can be quickly started up and earthquake motion warning information can be displayed. There is an effect that can be output.
  • control unit 118 in FIGS. 18, 19, 20, 21, 21, 22, 23, and 24 also includes the emergency warning broadcast activation flag information from the TMCC decoding unit 113 and the like.
  • the output unit 2901 outputs the seismic motion warning and controls the broadcast receiving unit 119 so as not to disturb the output of the seismic motion warning. To do.
  • digital broadcast receivers in FIGS. 1, 26, and 29 may be either 13-segment receivers or one-segment receivers.
  • Embodiment 5 is a method for transmitting earthquake motion warning information transmitted using an AC signal included in segment number # 0 transmitted by the digital broadcast transmission device of FIG. It relates to the receiver operation of the receiver. In the following, description will be made with reference to FIG. 33 showing the seismic motion warning information sending operation and the receiver operation.
  • earthquake motion information is alternately transmitted in the order of “region information” and “seismic source information”.
  • the “region information” indicates earthquake motion information transmitted with “page type” “0” of the earthquake motion warning information and information indicating the target region of the earthquake motion warning.
  • the “seismic source information” indicates seismic motion information transmitted by “page type” “1” of the seismic motion warning information, and information on the seismic motion warning source.
  • the digital broadcast receiving device that receives the earthquake motion warning information is assumed to always perform the processing for acquiring the earthquake motion warning information and the device that performs the processing for acquiring the earthquake motion warning information only when the power is turned on.
  • the latter implementation is considered common.
  • there is a high possibility that the seismic motion warning being issued is processed from the middle.
  • the seismic motion warning is for notifying the arrival of a strong shaking after a few seconds and preparing for it, so it is desirable to notify the viewer as soon as possible.
  • region information and “seismic source information” are alternately sent once per OFDM frame in this order.
  • the digital broadcast receiving apparatus can acquire both “region information” and “seismic source information” within 3 OFDM frames, regardless of the timing at which the acquisition process is started.
  • sending “region information” first it is possible to first inform the receiver whether or not the installation location of the receiver is the target area of the earthquake motion warning.
  • FIG. 33 in FIG. 33 is an emergency earthquake warning transmitted from the earthquake motion warning distribution server of the Japan Meteorological Agency (not shown), and indicates the reception of the first report that is the first report after the occurrence of the earthquake.
  • the “start / end flag”, “update flag”, and “signal identification” continue to be set in 3302.
  • the earthquake motion information is set to “page type” “1”, and “seismic source information” is transmitted.
  • the earthquake motion warning information (3302) including “regional information” and the earthquake motion warning information (3303) including “seismic source information” are alternately and once per OFDM frame. Continue sending one by one.
  • the digital broadcast receiver can promptly provide both “regional information” and “seismic source information” regardless of the timing of earthquake motion warning information acquisition.
  • FIG. 1, FIG. 25, and FIG. 33 are used for the receiver operation when “region information” and “seismic source information” are alternately transmitted once in OFDM frame units in this order in the earthquake motion warning information. I will explain. About FIG. 1, FIG. 25, the description about the content described in Example 1 is omitted.
  • the earthquake motion warning information transmitted from the digital broadcast transmission device is alternately transmitted once for each OFDM frame in the order of “page type”, “0: area information”, and “1: seismic source information”. A transmission pattern is assumed.
  • the AC decoding unit 116 monitors the start / end flag of the earthquake motion warning information, and from the start / end flag “11: No detailed earthquake motion information” to “00: Detailed earthquake motion information”. The change to “Yes” is detected, and the control unit 118 (FIG. 1) is notified of the seismic motion warning information, and the control unit 118 uses this as a trigger to send a control signal to put the determination unit 117 (FIG. 1) in the normal state. Send and start processing for earthquake alarm.
  • the discriminating unit 117 (FIG. 25) that has entered the normal state performs the receiving process of the seismic motion information transmitted in the above-described transmission pattern when detecting a change in the value of the update flag.
  • FIG. 33 2 OFDM frame information is acquired from the time of detection, and seismic motion information reception processing is performed.
  • FIG. 33 an OFDM frame 330 and an OFDM frame 3303 are shown.
  • the received earthquake motion warning information is confirmed by the data discrimination storage unit 2506 (FIG. 25) for the signal identification value shown in FIG.
  • the value of the signal identification is “000: Detailed earthquake motion warning information (there is a corresponding area)” shown in FIG. 9, the earthquake motion warning detailed information shown in FIG. 5, FIG. 10, FIG.
  • the ground motion information “region information” having a page type value “0” and “seismic source information” having a page type value “1” are alternately transmitted.
  • the storage of “region information” is updated when the OFDM frame (3302) at the time of detection is received, and the storage of “seismic source information” is updated when the next OFDM frame (3303) is received.
  • Information on both “regional information” and “seismic source information” can be acquired in two OFDM frames. Since the update flag always changes from “11” to “00” at the timing of detecting the earthquake motion warning information, the determination unit 117 always acquires and updates the earthquake motion warning information. Since the processing unit 2509 generates warning information to be transmitted to the viewer as a video signal or an audio signal every time the storage in the data discrimination storage unit 2506 is updated, the latest information can always be provided to the viewer. .
  • the digital broadcast receiving apparatus obtains the earthquake motion warning information of the transmission pattern in which “region information” and “seismic source information” are alternately sent one by one in this order, so that the configuration of the receiver can be simplified. can do.
  • regional information and “seismic source information” are sent alternately, it is possible to acquire both information in 2 OFDM frames from the detection of the earthquake motion warning information, and promptly notify the viewer of the information on the earthquake motion warning. be able to.
  • the latest updated information can be immediately transmitted to the viewer.
  • the seismic motion warning information acquisition process is performed only when an update is detected, the seismic motion warning information reception processing is not performed when new seismic motion warning information is not received, and the processing load on the receiver can be reduced.
  • the receiver can immediately notify the viewer whether or not the installation location of the receiver is the target region of the earthquake motion warning information.
  • FIGS. 33 and 3320 show the reception processing operation of the digital broadcast receiving apparatus that performs the seismic motion warning information acquisition processing only when the power is turned on.
  • the AC decoder 116 When the AC decoder 116 is turned on (3330), it starts monitoring the start / end flag of the earthquake motion warning information. When the power is turned on, the earthquake motion warning information may have already been issued. First, the value of the start / end flag is confirmed. If “00: Detailed earthquake motion information exists”, the control unit 118 is notified of the earthquake motion warning. Communicate that information is being reported. In response to this, the control unit 118 sends a control signal for bringing the determination unit 117 into a normal state, and starts a process corresponding to the earthquake motion warning.
  • the discriminating unit 117 (FIG. 25) that has entered the normal state assumes that the seismic motion information is transmitted in the transmission pattern described above, even if it does not detect a change in the value of the update flag, information on 2 OFDM frames after power-on.
  • To acquire seismic motion information. 33 correspond to 2OFDM frames that are received after the power is turned on and that perform seismic motion information acquisition processing.
  • the signal identification value shown in FIG. 5 is confirmed in the data discrimination storage unit 2506 (FIG. 25) in the same manner as in FIGS.
  • the value of the signal identification is “000: Detailed earthquake motion warning information (there is a corresponding area)” shown in FIG. 9, the earthquake motion warning detailed information shown in FIG. 5, FIG. 10, FIG. To remember.
  • region information having a page type value “0” and “seismic source information” having a page type value “1” are alternately transmitted.
  • the order of receiving “Regional information” and “Earthquake information” may be reversed, but within three OFDM frames from the start of receiving the first earthquake motion warning detailed information when the power is turned on, Both “seismic source information” and ground motion information can be acquired. Further, even if the order of receiving “region information” and “seismic source information” is reversed, it can be discriminated by the value of the page type, so that no problem occurs in the reception processing.
  • the same effects as those of the digital broadcast receiving apparatus of FIGS. 33 and 3310 can be obtained, and even when the earthquake motion warning information has already been issued when the power is turned on, the earthquake motion warning information can be quickly acquired and quickly In addition, a warning can be transmitted to the viewer.
  • Embodiment 6 according to the present invention will be described with reference to FIG.
  • Embodiment 6 is an example in which seismic motion information is repeatedly and alternately transmitted in units of OFDM frames in the order of “page type”, “1: seismic source information”, and “0: regional information”.
  • 3401 Emergency earthquake warning from the Japan Meteorological Agency has not been received. As with 3301 of the fifth embodiment, all bits are transmitted with “1”, and immediately after receiving the first earthquake early warning 3300, the “start / end flag” is changed from “11” to “00”, and an earthquake motion warning is issued. Start sending information.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is “000” indicating “detailed information on earthquake motion warning (with corresponding area)” if the target area of the earthquake motion warning is within the broadcast area, and “detailed information on earthquake motion warning (without corresponding area)” when there is not.
  • the seismic motion information is alternately sent once in the order of “page type”, “1: seismic source information”, and “0: regional information”. Therefore, the first seismic motion warning information transmission OFDM frame is set to “page type” “1”. And send “seismic source information”.
  • the “start / end flag”, “update flag”, and “signal identification” continue to be set to 3402.
  • the earthquake motion information is set to “page type” “0”, and “region information” is transmitted.
  • the seismic motion warning information (3402) including “seismic source information” and the seismic motion warning information (3403) including “regional information” are alternately and once per OFDM frame. Continue sending one by one.
  • the digital broadcast receiving apparatus can promptly “regional information” and “seismic source information” regardless of the timing of the earthquake motion warning information acquisition. Both information can be provided.
  • the “seismic source information” includes “earthquake motion information total number” for identifying the number of seismic motion information and “earthquake motion information identification” information for identifying the seismic motion information when a plurality of seismic motion information is transmitted.
  • the receiver can first identify the number of earthquake motion information and which seismic motion information. Therefore, it is possible to provide a transmission pattern that makes it easy to associate “seismic source information” and “region information” when there are a plurality of pieces of earthquake motion information.
  • the digital broadcast receiver can promptly provide both “regional information” and “seismic source information” regardless of the timing of earthquake motion warning information acquisition.
  • FIG. 1, FIG. 25, and FIG. 34 the receiver operation when “seismic source information” and “region information” are alternately transmitted once in OFDM frame units in this order in the earthquake motion warning information. I will explain. About FIG. 1, FIG. 25, the description about the content described in Example 1 is omitted.
  • the earthquake motion warning information transmitted from the digital broadcast transmission device is alternately transmitted once for each OFDM frame in the order of “page type”, “1: seismic source information”, and “0: regional information”. A transmission pattern is assumed.
  • the AC decoding unit 116 monitors the start / end flag of the earthquake motion warning information, and from the start / end flag “11: No detailed earthquake motion information” to “00: Detailed earthquake motion information”. The change to “Yes” is detected, and the control unit 118 (FIG. 1) is notified of the seismic motion warning information, and the control unit 118 uses this as a trigger to send a control signal to put the determination unit 117 (FIG. 1) in the normal state. Send and start processing for earthquake alarm.
  • the discriminating unit 117 (FIG. 25) that has entered the normal state performs the receiving process of the seismic motion information transmitted in the above-described transmission pattern when detecting a change in the value of the update flag.
  • FIG. 34 2 OFDM frame information is acquired from the time of detection, and seismic motion information reception processing is performed.
  • FIG. 34 an OFDM frame 3402 and an OFDM frame 3403 are shown.
  • the received earthquake motion warning information is confirmed by the data discrimination storage unit 2506 (FIG. 25) for the signal identification value shown in FIG.
  • the seismic motion information is alternately transmitted as “seismic source information” having a page type value “1” and “region information” having a page type value “0”.
  • the storage of the “seismic source information” is updated when the OFDM frame (3402) at the time of detection is received, and the storage of “region information” is updated when the next OFDM frame (3403) is received.
  • Information on both “regional information” and “seismic source information” can be acquired in two OFDM frames. Since the update flag always changes from “11” to “00” at the timing of detecting the earthquake motion warning information, the determination unit 117 always acquires and updates the earthquake motion warning information. Since the processing unit 2509 generates warning information to be transmitted to the viewer as a video signal or an audio signal every time the storage in the data discrimination storage unit 2506 is updated, the latest information can always be provided to the viewer. .
  • the digital broadcast receiving apparatus acquires the earthquake motion warning information of the transmission pattern in which “seismic source information” and “region information” are alternately sent one by one in this order. Can be.
  • “seismic source information” and “regional information” are sent alternately, “2 information can be acquired in 2 OFDM frames from the detection of seismic motion warning information, and the seismic motion warning information is quickly notified to the viewer. can do.
  • the latest updated information can be immediately transmitted to the viewer.
  • the seismic motion warning information acquisition process is performed only when an update is detected, the seismic motion warning information reception processing is not performed when new seismic motion warning information is not received, and the processing load on the receiver can be reduced.
  • the receiver can receive the “seismic source information” earthquake motion warning information first. Therefore, the number of seismic motion information and which seismic motion information can be identified first, and there is an effect that it becomes easy to associate “seismic source information” and “region information” when there are a plurality of seismic motion information.
  • FIGS. 33 and 3420 show the reception processing operation of the digital broadcast receiving apparatus that performs the seismic motion warning information acquisition processing only when the power is turned on.
  • the AC decoding unit 116 When the AC decoding unit 116 is turned on (3430), it starts monitoring the start / end flag of the earthquake motion warning information. When the power is turned on, the earthquake motion warning information may have already been issued. First, the value of the start / end flag is confirmed. If “00: Detailed earthquake motion information exists”, the control unit 118 is notified of the earthquake motion warning. Communicate that information is being reported. In response to this, the control unit 118 sends a control signal for bringing the determination unit 117 into a normal state, and starts a process corresponding to the earthquake motion warning.
  • the discriminating unit 117 (FIG. 25) that has entered the normal state can detect the information of 2 OFDM frames after the power is turned on even if it does not detect a change in the value of the update flag.
  • 34, 3404 and 3405 in FIG. 34 correspond to 2OFDM frames that are received after the power is turned on and that perform an acquisition process of seismic motion information.
  • the signal identification value shown in FIG. 5 is confirmed in the data discrimination storage unit 2506 (FIG. 25) in the same manner as in FIGS.
  • the earthquake motion information is alternately transmitted as “seismic source information” having a page type value “1” and “region information” having a page type value “0”.
  • the order of receiving the “seismic source information” and “regional information” may be reversed, but the “seismic source information”, within 3 OFDM frames from the start of receiving the first earthquake motion warning detailed information when the power is turned on. "Regional information”, both earthquake motion information can be acquired. Also, even if the order of receiving “seismic source information” and “regional information” is reversed, it can be discriminated by the value of the page type, so no problem occurs in the reception process.
  • the same effects as those of the digital broadcast receiving apparatus of FIGS. 34 and 3410 can be obtained, and even when the earthquake motion warning information has already been issued when the power is turned on, the earthquake motion warning information can be quickly acquired and quickly In addition, a warning can be transmitted to the viewer.
  • Embodiment 7 according to the present invention will be described with reference to FIG.
  • Embodiment 7 is an example in which seismic motion information is repeatedly transmitted twice in units of OFDM frames in the order of “page type”, “0: regional information”, and “1: seismic source information”. That is, in this example, “0: area information”, “0: area information”, “1: seismic information”, and “1: seismic information” are transmitted in one set.
  • 3501 An emergency earthquake bulletin from the Japan Meteorological Agency has not been received. As with 3301 of the fifth embodiment, all bits are transmitted with “1”, and immediately after receiving the first earthquake early warning 3300, the “start / end flag” is changed from “11” to “00”, and an earthquake motion warning is issued. Start sending information.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is “000” indicating “detailed information on earthquake motion warning (with corresponding area)” if the target area of the earthquake motion warning is within the broadcast area, and “detailed information on earthquake motion warning (without corresponding area)” when there is not.
  • the seismic motion information is alternately transmitted twice in the order of “page type”, “0: regional information”, and “1: seismic source information”, so the first seismic motion warning information transmission OFDM frame is set to “page type” “0”. "Regional information” is sent out.
  • the earthquake motion warning information sent at 3502 is sent again.
  • the “start / end flag”, “update flag”, and “signal identification” continue to be set to 3502.
  • the earthquake motion information is set to “page type” “1”, and “seismic source information” is transmitted.
  • the earthquake motion warning information sent in 3504 is sent again.
  • the earthquake motion warning information including “region information” and the earthquake motion warning information including “seismic source information” are alternately and twice in units of OFDM frames, that is, 3502, 3503. , 3504, and 3505 are repeatedly sent.
  • the digital broadcast transmission device can provide the same effects as the digital broadcast transmission device according to the fifth embodiment.
  • by sending the same information twice it is possible to provide earthquake motion warning information so that it can be easily obtained even when the reception status is not so good in a portable digital broadcast receiver.
  • FIG. 1, FIG. 25, and FIG. 35 are used for the receiver operation when “regional information” and “seismic source information” are alternately transmitted twice in OFDM frame units in this order as earthquake motion warning information. I will explain. About FIG. 1, FIG. 25, the description about the content described in Example 1 is omitted.
  • FIGS. 35 and 3510 show the reception processing operation of the digital broadcast receiving apparatus that always performs the acquisition processing of earthquake motion warning information.
  • the seismic motion warning information transmitted from the digital broadcast transmitting device is in the order of “page type”, “0: regional information”, “0: regional information”, “1: epicenter information”, “1: seismic source information”.
  • this is assumed to be a transmission pattern transmitted in units of OFDM frames.
  • the AC decoding unit 116 monitors the start / end flag of the earthquake motion warning information, and from the start / end flag “11: No detailed earthquake motion information” to “00: Detailed earthquake motion information”. The change to “Yes” is detected, and the control unit 118 (FIG. 1) is notified of the seismic motion warning information, and the control unit 118 uses this as a trigger to send a control signal to put the determination unit 117 (FIG. 1) in the normal state. Send and start processing for earthquake alarm.
  • the discriminating unit 117 (FIG. 25) that has entered the normal state performs the receiving process of the seismic motion information transmitted in the above-described transmission pattern when detecting a change in the value of the update flag.
  • the information of the first OFDM frame (3502) and the third OFDM frame (3504) in which a change in the value of the update flag is detected is acquired, and the seismic motion information reception process is performed.
  • the received earthquake motion warning information is confirmed by the data discrimination storage unit 2506 (FIG. 25) for the signal identification value shown in FIG.
  • the value of the signal identification is “000: Detailed earthquake motion warning information (there is a corresponding area)” shown in FIG. 9, the earthquake motion warning detailed information shown in FIG. 5, FIG. 10, FIG.
  • the ground motion information “region information” having a page type value “0” and “seismic source information” having a page type value “1” are alternately transmitted.
  • the storage of “region information” is updated when the OFDM frame (3502) at the time of detection is received, and the storage of “seismic source information” is received when the OFDM frame (3503) is received after the 2 OFDM frames. It is updated, and both “Regional information” and “Episode information” can be acquired within 3 OFDM frames. Even if reception of the OFDM frame 3502 and reception of the OFDM frame 3504 fail to acquire earthquake motion warning information, the “region information” and “seismic source information” are re-acquired in the OFDM frame 3503 and the OFDM frame 3505. It is possible to acquire both pieces of information in the fourth OFDM frame.
  • the determination unit 117 Since the update flag always changes from “11” to “00” at the timing when the earthquake motion warning information is detected, the determination unit 117 always performs the acquisition and update processing of the earthquake motion warning information. Since the processing unit 2509 generates warning information to be transmitted to the viewer as a video signal or an audio signal every time the storage in the data discrimination storage unit 2506 is updated, the latest information can always be provided to the viewer. .
  • this embodiment can provide the same effects as those of the fifth embodiment.
  • FIGS. 35 and 3520 show the reception processing operation of the digital broadcast receiving apparatus that performs the seismic motion warning information acquisition processing only when the power is turned on.
  • the AC decoding unit 116 When the AC decoding unit 116 is turned on (3530), it starts monitoring the start / end flag of the earthquake motion warning information. When the power is turned on, the earthquake motion warning information may have already been issued. First, the value of the start / end flag is confirmed. If “00: Detailed earthquake motion information exists”, the control unit 118 is notified of the earthquake motion warning. Communicate that information is being reported. In response to this, the control unit 118 sends a control signal for bringing the determination unit 117 into a normal state, and starts a process corresponding to the earthquake motion warning.
  • the discriminating unit 117 in the normal state assumes that the seismic motion information is transmitted in the transmission pattern described above, and the first OFDM frame after power-on is detected even if no change in the value of the update flag is detected.
  • the second OFDM frame information is acquired, and the seismic motion information acquisition process is performed.
  • 35, 3506 and 3507 in FIG. 35 correspond to the first OFDM frame and the second OFDM frame which are received after the power is turned on and which performs the seismic motion information acquisition process.
  • the signal identification value shown in FIG. 5 is confirmed in the data discrimination storage unit 2506 (FIG. 25) as in the case of FIGS.
  • the earthquake motion warning detailed information shown in FIG. 5, FIG. 10, FIG.
  • the earthquake motion warning detailed information shown in FIG. 5, FIG. 10, FIG.
  • the ground motion information “region information” having a page type value “0” and “seismic source information” having a page type value “1” are alternately transmitted.
  • the order of receiving “regional information” and “seismic source information” may be reversed, but within four OFDM frames from the start of receiving the first earthquake motion warning detailed information, the “regional information”, “ Both “seismic source information” and ground motion information can be acquired.
  • the first OFDM frame (3502) and the third OFDM frame (3503) at the time of detection are detected when a change in the value of the update flag is detected, as in the processing of FIGS. 35 and 3510.
  • the same effect as that of the digital broadcast receiver of FIGS. 35 and 3510 can be obtained, and even when the earthquake motion warning information has already been issued when the power is turned on, the earthquake motion warning information can be quickly acquired and quickly In addition, a warning can be transmitted to the viewer.
  • Embodiment 8 according to the present invention will be described with reference to FIG.
  • Embodiment 7 is an example in which earthquake motion information is repeatedly transmitted twice in units of OFDM frames in the order of “page type”, “1: epicenter information”, and “0: area information”. That is, in this example, “1: epicenter information”, “1: seismic source information”, “0: area information”, and “0: area information” are transmitted in one set.
  • 3601 An emergency earthquake bulletin from the Japan Meteorological Agency has not been received. As with 3301 of the fifth embodiment, all bits are transmitted with “1”, and immediately after receiving the first earthquake early warning 3300, the “start / end flag” is changed from “11” to “00”, and an earthquake motion warning is issued. Start sending information.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is “000” indicating “detailed information on earthquake motion warning (with corresponding area)” if the target area of the earthquake motion warning is within the broadcast area, and “detailed information on earthquake motion warning (without corresponding area)” when there is not.
  • the seismic motion information is alternately transmitted twice in the order of “page type”, “1: seismic source information”, and “0: area information”. Therefore, the first seismic motion warning information transmission OFDM frame is set to “page type” “1”. And send “seismic source information”.
  • 3603 This is an OFDM frame for sending the second earthquake motion warning information.
  • the earthquake motion warning information sent at 3602 is sent again.
  • 3604 This is an OFDM frame that transmits the third earthquake motion warning information.
  • the “start / end flag”, “update flag”, and “signal identification” continue to be 3602.
  • the earthquake motion information is set to “page type” “0”, and “region information” is transmitted.
  • the earthquake motion warning information sent at 3604 is sent again.
  • the seismic motion warning information including “seismic source information” and the seismic motion warning information including “region information” are alternately and twice in units of OFDM frames, that is, 3602 and 3603. , 3604 and 3605 are repeatedly sent.
  • the digital broadcast transmission device can provide the same effects as the digital broadcast transmission device according to the sixth embodiment.
  • by sending earthquake motion warning information in a transmission pattern in which “seismic source information” and “region information” are sent twice alternately it is easy to obtain earthquake motion warning information even when the reception status is not so good Can be expected.
  • FIG. 1, FIG. 25, and FIG. 36 show the receiver operation when the “seismic source information” and the “region information” are alternately transmitted twice in this order in OFDM frame units in the earthquake motion warning information. It explains using. About FIG. 1, FIG. 25, the description about the content described in Example 1 is omitted.
  • the seismic motion warning information transmitted from the digital broadcast transmitting device is in the order of “page type”, “1: seismic source information”, “1: seismic source information”, “0: regional information”, “0: regional information”.
  • this is assumed to be a transmission pattern transmitted in units of OFDM frames.
  • the AC decoding unit 116 monitors the start / end flag of the earthquake motion warning information, and from the start / end flag “11: No detailed earthquake motion information” to “00: Detailed earthquake motion information”. The change to “Yes” is detected, and the control unit 118 (FIG. 1) is notified of the seismic motion warning information, and the control unit 118 uses this as a trigger to send a control signal to put the determination unit 117 (FIG. 1) in the normal state. Send and start processing for earthquake alarm.
  • the discriminating unit 117 (FIG. 25) that has entered the normal state performs the receiving process of the seismic motion information transmitted in the above-described transmission pattern when detecting a change in the value of the update flag.
  • the seismic motion information is alternately transmitted as “seismic source information” having a page type value “1” and “region information” having a page type value “0”.
  • the storage of “region information” is updated when the OFDM frame (3602) at the time of detection is received, and the storage of “seismic source information” is updated when the third OFDM frame (3604) after the detection is received.
  • the determination unit 117 Since the update flag always changes from “11” to “00” at the timing when the earthquake motion warning information is detected, the determination unit 117 always performs the acquisition and update processing of the earthquake motion warning information. Since the processing unit 2509 generates warning information to be transmitted to the viewer as a video signal or an audio signal every time the storage in the data discrimination storage unit 2506 is updated, the latest information can always be provided to the viewer. .
  • this embodiment can provide the same effects as those of the sixth embodiment.
  • FIGS. 36 and 3620 show the reception processing operation of the digital broadcast receiving apparatus that performs the seismic motion warning information acquisition processing only when the power is turned on.
  • the AC decoding unit 116 When the AC decoding unit 116 is turned on (3630), it starts monitoring the start / end flag of the earthquake motion warning information. When the power is turned on, the earthquake motion warning information may have already been issued. First, the value of the start / end flag is confirmed. If “00: Detailed earthquake motion information exists”, the control unit 118 is notified of the earthquake motion warning. Communicate that information is being reported. In response to this, the control unit 118 sends a control signal for bringing the determination unit 117 into a normal state, and starts a process corresponding to the earthquake motion warning.
  • the determination unit 117 in the normal state does not detect a change in the value of the update flag
  • the seismic motion warning information received in the later third OFDM frame (3607) is acquired.
  • the signal identification value shown in FIG. 5 is confirmed in the data discrimination storage unit 2506 (FIG. 25), as in the case of FIGS.
  • the value of the signal identification is “000: Detailed earthquake motion warning information (there is a corresponding area)” shown in FIG. 9, the earthquake motion warning detailed information shown in FIG. 5, FIG. 10, FIG. To remember.
  • region information having a page type value “0” and “seismic source information” having a page type value “1” are alternately transmitted.
  • the order of receiving “Regional information” and “Earthquake information” may be reversed, but within three OFDM frames from the start of receiving the first earthquake motion warning detailed information when the power is turned on, Both “seismic source information” and ground motion information can be acquired.
  • the order of receiving “region information” and “seismic source information” is reversed, it can be discriminated by the value of the page type, so that no problem occurs in the reception processing.
  • the seismic motion warning information is re-established in the second and fourth OFDM frames after the power is turned on for the second time. Can be acquired.
  • the first OFDM frame (3602) at the time of detection and the third OFDM after the update detection are detected when a change in the value of the update flag is detected, as in the processes of FIGS. 36 and 3610.
  • the acquisition processing of the earthquake motion warning information received in the frame (3603) is performed.
  • the same effects as those of the digital broadcast receiving apparatus of FIGS. 36 and 3610 can be obtained, and even when the earthquake motion warning information has already been issued when the power is turned on, the earthquake motion warning information can be quickly acquired and quickly In addition, a warning can be transmitted to the viewer.
  • Embodiment 9 according to the present invention will be described with reference to FIG.
  • Embodiment 9 is an example in which only “page type” and “0: area information” of earthquake motion information are repeatedly transmitted. When only “page type” and “0: area information” are transmitted, this represents a case where only the target area information can be acquired by the earthquake early warning.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is determined from information on the target area obtained from the earthquake early warning. If the target area is within the broadcast area, “000” indicating “earthquake motion warning detailed information (with corresponding area)” is set, and if not, “earthquake motion warning detailed information (without corresponding area)” and “001” are set. In this embodiment, “000” is set.
  • the earthquake motion information is set to “page type” and “0: regional information”, and “local information” is transmitted.
  • the seismic motion warning information including “region information” is continuously transmitted in units of OFDM frames.
  • Earthquake motion information can be sent immediately to a digital broadcast receiver.
  • Embodiment 10 according to the present invention will be described with reference to FIG.
  • Embodiment 9 is an example in which only “page type” “1: seismic source information” of earthquake motion information is repeatedly transmitted.
  • the broadcast area is Aomori Prefecture
  • “Page Type” “0: Target Area” (FIG. 11) is also assigned in Aomori Prefecture, so the areas of “Signal Identification” and “Page Type” “0: Target Area” Allocation granularity is equal.
  • the broadcasting area is the Tokyo metropolitan area
  • the area includes Tokyo, Chiba Prefecture, Kanagawa Prefecture, Saitama Prefecture, and the like.
  • the area allocation of “page type” and “0: target area” Tokyo, Chiba prefecture, Kanagawa prefecture, and Saitama prefecture are allocated as individual areas. That is, the area allocation granularity of “signal identification” and “page type” “0: target area” are different.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is set to “000” indicating “earthquake motion warning detailed information (with corresponding area)” when the target area is within the broadcasting area.
  • the seismic motion information is set to “page type” “1: seismic source information” and “seismic source information” is transmitted on the premise that the area allocation granularity of “signal identification” and “page type” “0: target area” is equal. .
  • the seismic motion warning information including “seismic source information” is continuously transmitted in units of OFDM frames.
  • Embodiment 11 according to the present invention will be described with reference to FIG.
  • Embodiment 9 is an example in which the “page type” “0” of earthquake motion information repeatedly transmits “earth motion information” all at 1. This method is used to send notifications only when an earthquake early warning from the Japan Meteorological Agency has been issued.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is set to “000” indicating “earthquake motion warning detailed information (there is a corresponding area)” when the target area is within the broadcasting area.
  • the earthquake motion information is set to “page type” “0: epicenter information” and all bits of “earthquake motion information” are transmitted as “1”.
  • the seismic motion warning information 3902 is continuously transmitted in units of OFDM frames.
  • Embodiment 12 according to the present invention will be described with reference to FIG.
  • Embodiment 7 is an example in which earthquake motion information is repeatedly transmitted in units of OFDM frames in the order of “page type”, “0: regional information”, “0: epicenter information”, and “1: seismic source information”. These “0”, “0” and “1” are transmitted as one set of transmission units.
  • This embodiment is an example in which “0: regional information” is preferentially acquired, and “0: regional information” has a probability of two-thirds for a digital broadcast receiver that acquires and processes earthquake motion information only when the power is turned on. This is a case where the transmission of seismic motion information is adjusted so that can be acquired first.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is “000” indicating “detailed information on earthquake motion warning (with corresponding area)” if the target area of the earthquake motion warning is within the broadcast area, and “detailed information on earthquake motion warning (without corresponding area)” when there is not.
  • Set “001”. In this embodiment, “000” is set. Since the seismic motion information is transmitted in units of “page type”, “0: regional information”, “0: regional information”, and “1: seismic source information”, the first seismic motion warning information transmission OFDM frame has “page type” “0”. "And send” Regional information ".
  • the “start / end flag”, “update flag”, and “signal identification” continue to be set to 4002.
  • the earthquake motion information is set to “page type” “1”, and “seismic source information” is transmitted.
  • the digital broadcast receiver that acquires and processes seismic motion warning information only when the power is turned on is adjusted so that “0: regional information” is first acquired preferentially. Is possible. Since the “region information” is received first, it is expected that the receiver can immediately notify the viewer whether or not the installation location of the receiver is the target region of the earthquake motion warning information.
  • Embodiment 13 according to the present invention will be described with reference to FIG.
  • Embodiment 7 is an example in which earthquake motion information is repeatedly transmitted in units of OFDM frames in the order of “page type”, “1: epicenter information”, “1: epicenter information”, and “0: regional information”. These “1”, “1” and “0” are transmitted as one set of transmission units.
  • This embodiment is an example of preferentially acquiring “1: seismic source information”.
  • a digital broadcast receiver that acquires and processes seismic motion information only when the power is turned on has a probability of two thirds “0: regional information”. This is a case where the transmission of seismic motion information is adjusted so that can be acquired first.
  • the “start / end flag” is changed from “11” to “00” indicating “start”.
  • the “update flag” is set to “00” which is a start value.
  • “Signal identification” is “000” indicating “detailed information on earthquake motion warning (with corresponding area)” if the target area of the earthquake motion warning is within the broadcast area, and “detailed information on earthquake motion warning (without corresponding area)” when there is not.
  • Set “001”. In this embodiment, “000” is set.
  • the seismic motion information is transmitted in units of “page type”, “1: seismic source information”, “1: seismic source information”, and “0: regional information”. Therefore, in the first seismic motion warning information transmission OFDM frame, “page type” “1” ”And send“ seismic source information ”.
  • the earthquake motion warning information sent in 4102 is sent again.
  • the “start / end flag”, “update flag”, and “signal identification” continue to be set to 4002.
  • the earthquake motion information is set to “page type” “0”, and “region information” is transmitted.
  • the digital broadcast receiver that acquires and processes seismic motion warning information only when the power is turned on first adjusts "1: seismic source information” first. It becomes possible to do.
  • the receiver side can expect an effect that the “seismic source information” and the “region information” can be easily associated with each other when there is a plurality of pieces of earthquake motion information.
  • Embodiment 14 according to the present invention will be described with reference to FIG.
  • This embodiment describes the case where two earthquakes are occurring in the method of transmitting ground motion information described in the fifth embodiment.
  • Example 5 shows a transmission method in which earthquake motion information is repeatedly and repeatedly transmitted in units of OFDM frames in the order of “page type”, “0: area information”, and “1: earthquake source information”.
  • a pair of seismic motion information of “page type”, “0: area information”, and “1: seismic source information” (hereinafter referred to as a seismic motion information pair) is used as a transmission unit, and the seismic motion information of the first earthquake Two pieces of ground motion information are transmitted by a method of alternately and repeatedly transmitting the ground motion information of the second earthquake.
  • FIG. 42 shows a method of transmitting ground motion information in a state where two earthquakes, earthquakes A and B are occurring.
  • Earthquake A is the first earthquake and B is the second.
  • 4201, 4202, 4203, and 4204 are earthquake motion information pairs by pairs of “page type”, “0: area information”, and “1: seismic source information”, respectively.
  • 4201 and 4203 are earthquake motion information pairs of earthquake A
  • 4202 and 4204 are earthquake motion warning pairs of earthquake B.
  • earthquake motion information pairs of earthquakes A and B are alternately sent in the order of occurrence of the earthquakes 4201, 4202, 4203, and 4204.
  • “Page type” and “1: Epicenter information” include information for identifying the seismic motion information of two earthquakes when they are transmitted. “Total number of seismic motion information” for identifying the total number of transmitted seismic motion information and “Earthquake information identifying” for identifying the seismic motion information being transmitted. “Total number of seismic motion information” is set to “0” when the total number of transmitted seismic motion information is one, and “1” when two. In the case of the present embodiment, since the ground motion information of two earthquakes is transmitted, “1” is obtained. “Seismic motion information identification” is set to “0” when the transmitted seismic motion information is the first information and “1” when the second information is the second information.
  • the “earthquake motion information identification” of the first earthquake A is “0” (4212), and the “earthquake motion information identification” of the first earthquake A is “1” (4214) is set.
  • the digital broadcast receiving apparatus can easily identify the earthquake motion information of the two earthquakes.
  • the digital broadcast receiving apparatus can quickly acquire both “regional information” and “seismic source information” for earthquake A and earthquake B, regardless of the timing of earthquake motion warning information acquisition.
  • the receiver since the “region information” is received first, it can be expected that the receiver can immediately notify the viewer whether or not the installation location of the receiver is the target region of the earthquake motion warning information.
  • “regional information” of the earthquake motion information of two earthquakes is acquired separately, if it is the corresponding region of both “regional information” of the two earthquakes, an effect such as notifying a strong warning to the viewer is expected. it can.
  • Embodiment 15 according to the present invention will be described with reference to FIG.
  • This embodiment describes the case where two earthquakes are occurring in the method of transmitting earthquake motion information described in the sixth embodiment.
  • Example 6 shows a transmission method in which earthquake motion information is repeatedly and repeatedly transmitted in units of OFDM frames in the order of “page type”, “1: earthquake source information”, and “0: area information”.
  • the transmission unit of “1: seismic source information” and “0: regional information” transmits the ground motion information of the first earthquake and the ground motion information of the second earthquake alternately and repeatedly in the order of 2 1 earthquake motion information is sent out.
  • FIG. 43 shows a method of transmitting ground motion information in a state where two earthquakes, earthquakes A and B are occurring.
  • Earthquake A is the first earthquake and B is the second.
  • reference numerals 4301, 4302, 4303, and 4304 denote earthquake motion information pairs that are pairs of “page type”, “1: epicenter information”, and “0: area information”, respectively.
  • Reference numerals 4301 and 4303 are earthquake motion information pairs for earthquake A
  • 4302 and 4304 are earthquake motion warning pairs for earthquake B.
  • earthquake motion information pairs of earthquakes A and B are alternately sent in the order of occurrence of earthquakes 4301, 4302, 4303, and 4304.
  • “Page type” and “1: Earthquake source information” include information for identifying the earthquake motion information of two earthquakes. “Total number of seismic motion information” for identifying the total number of transmitted seismic motion information and “Earthquake information identifying” for identifying the seismic motion information being transmitted. “Total number of seismic motion information” is set to “0” when the total number of transmitted seismic motion information is one, and “1” when two. In the case of the present embodiment, since the ground motion information of two earthquakes is transmitted, “1” is obtained. “Seismic motion information identification” is set to “0” when the transmitted ground motion information is the first information and “1” when the second information is the second information.
  • the “earthquake motion information identification” of the first earthquake A is “0” (4311) and the “earthquake motion information identification” of the first earthquake A is It is set to “1” (4313).
  • the digital broadcast diagnosis apparatus can easily identify the earthquake motion information of two earthquakes by specifying the transmission pattern and transmitting the earthquake motion warning information in the same manner as in Example 14.
  • the digital broadcast receiving apparatus can quickly acquire both “regional information” and “seismic source information” for earthquake A and earthquake B, regardless of the timing of earthquake motion warning information acquisition.
  • the digital broadcast receiving apparatus since “page type” “1: epicenter information” is transmitted as the first information of the transmission pattern, the digital broadcast receiving apparatus can first know that two pieces of earthquake motion information are transmitted. . Therefore, the receiver can promptly notify the viewer that two earthquake motion warnings have been issued. Furthermore, the determination when the number of earthquake motion warnings is changed from one to two becomes easy.
  • Embodiment 16 according to the present invention will be described with reference to FIG.
  • This embodiment is an example of a method for transmitting ground motion information when two earthquakes are occurring.
  • the second earthquake page type “0: area information” is used as a transmission unit, and two pieces of earthquake motion information are transmitted in a transmission pattern that is repeatedly transmitted in this transmission unit.
  • FIG. 44 shows a transmission pattern of ground motion information in a state where two earthquakes, earthquakes A and B are occurring.
  • 4401 and 4402 are one unit of the transmission pattern of the seismic motion information in this embodiment.
  • the data is sent in the order of type “0: area information” (4413) and earthquake B page type “0: area information” (4414). Then, one unit of this transmission pattern is repeatedly transmitted.
  • “Page type” and “1: Earthquake source information” include information for identifying the earthquake motion information of two earthquakes. “Total number of seismic motion information” for identifying the total number of transmitted seismic motion information and “Earthquake information identifying” for identifying the seismic motion information being transmitted. “Total number of seismic motion information” is set to “0” when the total number of transmitted seismic motion information is one, and “1” when two. In the case of the present embodiment, since the ground motion information of two earthquakes is transmitted, “1” is obtained. “Seismic motion information identification” is set to “0” when the transmitted ground motion information is the first information and “1” when the second information is the second information.
  • the “earthquake motion information identification” of the first earthquake A is “0” (4411) and the “earthquake motion information identification” of the first earthquake A is “1” (4412) is set.
  • the digital broadcast diagnosis apparatus can easily identify the earthquake motion information of two earthquakes.
  • the digital broadcast receiving apparatus can quickly acquire both “region information” and “seismic source information” for earthquake A and earthquake B, regardless of the timing of earthquake motion warning information acquisition.
  • the digital broadcast receiving apparatus since “page type” “1: epicenter information” is transmitted as the first information of the transmission pattern, the digital broadcast receiving apparatus first knows that two pieces of earthquake motion information are transmitted. Can do. Therefore, the receiver can promptly notify the viewer that two earthquake motion warnings have been issued. Furthermore, the determination when the number of earthquake motion warnings is changed from one to two becomes easy.
  • Embodiment 17 according to the present invention will be described with reference to FIG.
  • This embodiment is an example of a method for transmitting ground motion information when two earthquakes are occurring.
  • the page type “1: epicenter information” of the first earthquake the page type “1: epicenter information” of the second earthquake, and a page including information on both the first and second earthquakes.
  • the type “0: area information” is used as a transmission unit, and two pieces of earthquake motion information are transmitted in a transmission pattern that is repeatedly transmitted in this transmission unit.
  • FIG. 45 shows a transmission pattern of ground motion information in a state where two earthquakes, earthquakes A and B are occurring.
  • reference numerals 4501 and 4502 denote one unit of the transmission pattern of earthquake motion information in the present embodiment.
  • Earthquake A Earthquake A
  • the information is transmitted in the order of page type “0: area information” (4413) including both pieces of information. Then, one unit of this transmission pattern is repeatedly transmitted.
  • “Page type” and “1: Earthquake source information” include information for identifying the earthquake motion information of two earthquakes. “Total number of seismic motion information” for identifying the total number of transmitted seismic motion information and “Earthquake information identifying” for identifying the seismic motion information being transmitted. “Total number of seismic motion information” is set to “0” when the total number of transmitted seismic motion information is one, and “1” when two. In the case of the present embodiment, since the ground motion information of two earthquakes is transmitted, “1” is obtained. “Seismic motion information identification” is set to “0” when the transmitted ground motion information is the first information and “1” when the second information is the second information.
  • the “earthquake motion information identification” of the first earthquake A is “0” (4411) and the “earthquake motion information identification” of the first earthquake A is “1” (4412) is set.
  • “Page type” and “0: Area information” information including the target areas of both earthquake A and earthquake B is transmitted.
  • the target areas of earthquake A are Tokyo, Chiba prefecture, and Kanagawa prefecture
  • the target areas of earthquake B are Kanagawa prefecture, Shizuoka prefecture, and Izu islands.
  • “page type” and “0: area information” are set as values indicating Tokyo, Chiba prefecture, Kanagawa prefecture, Shizuoka prefecture, and Izu islands as target areas.
  • the digital broadcast diagnosis apparatus can easily identify the earthquake motion information of two earthquakes.
  • the digital broadcast receiving apparatus can quickly acquire both “regional information” and “seismic source information” for earthquake A and earthquake B, regardless of the timing of earthquake motion warning information acquisition.
  • the digital broadcast receiving apparatus first knows that two pieces of earthquake motion information are transmitted. It is easy to make a determination when switching from the state in which ground motion information for one earthquake is transmitted to the transmission of ground motion for two earthquakes.
  • the time required for the earthquake motion information of two earthquakes can be reduced by 1 OFDM.
  • Information source encoding unit 202 ... MPEG2 multiplexing unit 203 ... TS remultiplexing unit 204 ... RS (Reed-Solomon) encoding unit 205 ... Hierarchy division unit 206a, b, c ... Parallel processing unit 207 ... Hierarchy synthesis unit 208: time interleave unit 209 ... frequency interleave unit 210 ... OFDM frame configuration unit 211 ... inverse high speed Fourier D conversion (IFFT) section 212 ... guard interval addition section 213 ... transmission section 214 ... pilot signal configuration section 215 ... TMCC signal configuration section 216 ... AC signal configuration sections 2501, 2503, 2512 ... input 2502 ... error correction detection section 2504 ...
  • IFFT inverse high speed Fourier D conversion

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

L'invention concerne un dispositif de réception de radiodiffusion numérique et un procédé de réception de radiodiffusion numérique. Elle se rapporte en particulier au fonctionnement détaillé d'un dispositif d'émission et d'un dispositif de réception pouvant retransmettre des bulletins d'alerte sismique urgents émis par radiodiffusion numérique avec le délai le plus court possible. Ledit dispositif de réception de radiodiffusion numérique comprend un récepteur qui reçoit des signaux d'émission, un démodulateur d'émission qui démodule des signaux d'émission numérique à partir des signaux d'émission reçus par le récepteur, et un démodulateur d'informations d'avertissement de mouvement sismique qui démodule des signaux d'informations d'avertissement de mouvement sismique à partir des signaux d'émission reçus par le récepteur.
PCT/JP2011/053197 2010-05-19 2011-02-16 Dispositif de réception de radiodiffusion numérique et procédé de réception de radiodiffusion numérique Ceased WO2011145369A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2010114884A JP2011244229A (ja) 2010-05-19 2010-05-19 デジタル放送受信装置およびデジタル放送受信方法
JP2010-114883 2010-05-19
JP2010114883A JP2011244228A (ja) 2010-05-19 2010-05-19 デジタル放送受信装置およびデジタル放送受信方法
JP2010-114884 2010-05-19

Publications (1)

Publication Number Publication Date
WO2011145369A1 true WO2011145369A1 (fr) 2011-11-24

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WO (1) WO2011145369A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3035672A4 (fr) * 2013-08-12 2017-03-29 LG Electronics Inc. Appareil d'émission de signal de diffusion, appareil de réception de signal de diffusion, procédé d'émission de signal de diffusion, et procédé de réception de signal de diffusion.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009272954A (ja) * 2008-05-08 2009-11-19 Nhk Engineering Services Inc 地上デジタルテレビジョン放送における緊急速報を受信する受信機、及び緊急速報を送信する送信装置
JP2009272949A (ja) * 2008-05-08 2009-11-19 Nhk Engineering Services Inc 地上デジタルテレビジョン放送における緊急速報を受信する受信機及び受信機付き時計

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009272954A (ja) * 2008-05-08 2009-11-19 Nhk Engineering Services Inc 地上デジタルテレビジョン放送における緊急速報を受信する受信機、及び緊急速報を送信する送信装置
JP2009272949A (ja) * 2008-05-08 2009-11-19 Nhk Engineering Services Inc 地上デジタルテレビジョン放送における緊急速報を受信する受信機及び受信機付き時計

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3035672A4 (fr) * 2013-08-12 2017-03-29 LG Electronics Inc. Appareil d'émission de signal de diffusion, appareil de réception de signal de diffusion, procédé d'émission de signal de diffusion, et procédé de réception de signal de diffusion.
US9774925B2 (en) 2013-08-12 2017-09-26 Lg Electronics Inc. Broadcast signal transmitting apparatus, broadcast signal receiving method, broadcast signal transmitting method, and broadcast signal receiving apparatus

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