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WO2020259604A1 - Appareil et procédé d'émission de contenu numérique, et appareil et procédé de réception de contenu numérique - Google Patents

Appareil et procédé d'émission de contenu numérique, et appareil et procédé de réception de contenu numérique Download PDF

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Publication number
WO2020259604A1
WO2020259604A1 PCT/CN2020/098170 CN2020098170W WO2020259604A1 WO 2020259604 A1 WO2020259604 A1 WO 2020259604A1 CN 2020098170 W CN2020098170 W CN 2020098170W WO 2020259604 A1 WO2020259604 A1 WO 2020259604A1
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WIPO (PCT)
Prior art keywords
tlv
data
stream
control information
digital content
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2020/098170
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English (en)
Chinese (zh)
Inventor
廣田敦志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Visual Technology Co Ltd
Toshiba Visual Solutions Corp
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Hisense Visual Technology Co Ltd
Toshiba Visual Solutions Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2019121939A external-priority patent/JP7146702B2/ja
Priority claimed from JP2019121938A external-priority patent/JP7247036B2/ja
Application filed by Hisense Visual Technology Co Ltd, Toshiba Visual Solutions Corp filed Critical Hisense Visual Technology Co Ltd
Priority to CN202080002687.6A priority Critical patent/CN112449749B/zh
Publication of WO2020259604A1 publication Critical patent/WO2020259604A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast

Definitions

  • the embodiment relates to a digital content sending device, a sending method, a digital content receiving device, and a receiving method.
  • ARIB-STD-B21 specifies partial transmission based on the MPEG-2TS method
  • the specifications of the stream hereinafter referred to as partial TS).
  • the above-mentioned partial TS is a TS obtained by selecting and extracting a specific program and a component (Component) in the program from a transport stream (hereinafter referred to as TS) received by a television receiver.
  • This partial TS is used as a format (content format) when the content received by the above-mentioned television receiving device is transmitted to external electronic devices such as other television receiving devices and tablet terminals.
  • the content can be used in external tablet terminals etc. through the transmission and reception of partial TS, so for the purpose of copyright protection and other purposes, in order to make it clear where the source of the program that is the basis of partial TS generation is broadcasted, it is necessary Record the identifiers of network_id, transport_stream_id, and service_id in the partial TS.
  • Non-Patent Document 1 ARIB STD-B21 Version 5.10 "Receiving Device for Digital Broadcasting" Standard Specification
  • Non-Patent Document 2 ARIB STD-B63 Version 1.7 "Receiving Device for Advanced Broadband Digital Satellite Broadcasting" Standard Specification
  • the technical problem to be solved by the present invention is to provide a digital content sending device and a sending method, which adopts a partial stream content form, so that the source of the broadcast program sent based on the MMT/TLV method is clearly visible.
  • a digital content transmission device includes a receiving unit, an acquisition and separation unit, a partial stream generation unit, and a transmission unit.
  • the reception unit receives a transmission signal transmitted based on the MMT/TLV method. If the acquisition and separation unit acquires the MMT/ The TLV stream separates the component data related to the specific content and the first control information data from the MMT/TLV stream, and the partial stream generating unit extracts the associated data used to determine the source of the specific content from the first control information data, and The partial stream is generated based on the second control information data and the component data, wherein the second control information data is generated by including associated data, and the transmitting unit transmits the partial stream.
  • a digital content receiving device includes a receiving unit, a separation and acquisition unit, and an extraction unit.
  • the receiving unit receives a partial stream generated from a transmission signal that is a signal transmitted based on the MMT/TLV method.
  • the separation and acquisition unit The component data and control information data related to the specific content are obtained separately from the partial stream, and the extraction unit extracts the associated data used to determine the source of the specific content from the control information data.
  • FIG. 1 is a diagram showing an example of a television receiving device and electronic equipment corresponding to digital broadcasting based on the MMT/TLV method of this embodiment
  • FIG. 2 is a block diagram showing an example of the functional configuration of a television receiving device corresponding to digital broadcasting based on the MMT/TLV method of the embodiment;
  • FIG. 3 is a block diagram showing an example of the functional configuration of an electronic device corresponding to digital broadcasting based on the MMT/TLV method of the embodiment
  • FIG. 4 is a flowchart showing an example of processing operations of an electronic device on the information source side of the television receiving apparatus corresponding to digital broadcasting based on the MMT/TLV method of the embodiment;
  • FIG. 5 is a diagram showing an example of the configuration of MH-SIT transmitted by partial TLV streaming in this embodiment
  • FIG. 6 is a diagram showing an example of the structure of a descriptor transmitted through a partial TLV stream in this embodiment
  • FIG. 7 is a flowchart showing an example of processing operations of the electronic device on the client side of the embodiment.
  • FIG. 8 is a diagram showing an example of a network of advanced broadband digital satellite broadcasting of Modification 1;
  • FIG. 9 is a block diagram showing an example of the functional configuration of a television receiving device in a network of advanced broadband digital satellite broadcasting according to Modification 2;
  • FIG. 10 is a flowchart showing an example of operation when the television receiving device of the modification example transmits a partial TLV stream
  • FIG. 11 is a block diagram showing an example of the functional configuration of a television receiving device that receives partial TLV streams in this modification
  • FIG. 12 is a flowchart showing an example of operation when the television receiving device receives a partial TLV stream in this modification.
  • FIG. 1 is a diagram showing an example of a television receiver and electronic equipment corresponding to digital broadcasting based on the MMT/TLV method according to this embodiment.
  • the television receiving device 1 receives a broadcasting signal of digital broadcasting based on the MMT/TLV method, and obtains the content transmitted through the broadcasting signal.
  • the electronic devices 2A, 2B, and 2C (referred to as electronic device 2 when no special distinction is required) have interfaces 3A, 3B, and 3C that can communicate with the television receiving device 1 respectively (when no special distinction is required, Called interface 3), the content sent by the broadcast signal is acquired via the interface 3, and the display output is performed.
  • the number of electronic devices 2 is three, but depending on the interface of the television receiver 1, it can be any number of one or more.
  • the electronic device 2 has a function (resolution, frame rate, etc.) capable of using content (broadcast program) transmitted based on the MMT/TLV method.
  • the electronic device 2 may be, for example, a tablet computer terminal, a monitor, a television receiver, and the like.
  • the interface 3 of the television receiving apparatus 1 and the electronic device 2 may be wired or wireless.
  • the television receiver 1 and the electronic device 2 may also be used to form a network compliant with DLNA (Registered Trademark) (Digital Living Network Alliance) or its extension method, and enable communication.
  • DLNA Registered Trademark
  • the electronic device 2 may be a smartphone.
  • FIG. 2 is a diagram showing an example of the functional configuration of a television receiving device compatible with digital broadcasting based on the MMT/TLV method according to the embodiment.
  • the television receiver 1 receives a digital broadcast signal based on the MMT/TLV method through the antenna 11, and demodulates the broadcast signal through the tuner 12 to obtain digital data (TLV stream) in the form of TLV (Type Length Value).
  • TLV stream digital data
  • the scrambled data is descrambled in the descrambling unit 13, converted from the TLV stream to IP/UDP stream in the demultiplexing unit 14, and further converted to MMT (Mpeg Media Transport, MPEG media transmission)
  • the stream is separated into component data (such as encoded image data, voice data, text data, etc.) and SI (Signaling Information) data as control information data.
  • the decoder 15 is used to decode the component data into service data such as image signals, voice signals, text data, etc.
  • the service data is input to the output processing unit 16, output timing, display method, etc. are adjusted, and output from the output unit 17, such as a display device and a speaker.
  • SI data is control information related to the broadcasting system such as information related to broadcast programs and control information related to multiplexing of IP packets.
  • the demultiplexing unit 14 also separates the time information data in the NTP format stored in the IP/UDP format in the TLV stream, reproduces the clock synchronization signal, and sends it to the decoder 15 and the output processing unit. 16 is used for clock control.
  • the partial TLV stream generating units 18A, 18B, and 18C (referred to as the partial TLV stream generating unit 18 if no special distinction is required) extract the structure from the TLV stream and MMT stream separated and obtained in the demultiplexing unit 14
  • the component data and control information data of the selected content (broadcast program) are edited and edited to generate a partial TLV stream.
  • the TLV stream is a stream to which IP information and the like are added to the MMT stream. Therefore, since the MMT stream is included in the TLV stream, hereinafter, the case of showing both is referred to as the MMT/TLV stream.
  • the partial TLV stream uses the partial TS based on the MPEG-2TS method as a reference.
  • the partial TS based on the MPEG-2TS method selects and extracts specific programs and the contents of the program from the transport stream (hereinafter referred to as TS, especially when distinguished from the partial TS) from the transport stream obtained from the broadcast signal.
  • the TS obtained from the component is specified in ARIB-STD-B21.
  • the partial TS based on the MPEG-2TS method is used as a reference to define the partial TLV stream, which is the format of content for advanced broadband digital satellite broadcasting. Part of the TLV flow will be described later. Partial TLV stream is sent from interface 19.
  • the interface 19 may include one or more interfaces.
  • FIG. 2 an example in which interfaces 19A, 19B, and 19C (referred to as interface 19 are not particularly distinguished) is shown.
  • 19A, 19B, and 19C perform the generation and decomposition of frame data corresponding to the respective predetermined communication protocols, and perform transmission and reception via wired or wireless media.
  • the interface 19 may also have encryption and encryption decoding functions such as descrambling.
  • the control unit 110 includes, for example, a CPU, and controls each function of the television receiver 1. For example, the control unit 110 performs connection establishment of external communication via various interfaces including the interface 19, operation control of the partial TLV stream generation unit 18, and the like. In addition, the control unit 110 controls various functions of the television receiving device 1 based on control signals from a user interface 111 such as a remote control included in the television receiving device 1.
  • FIG. 3 is a block diagram showing an example of the functional configuration of an electronic device corresponding to the video and audio playback based on the MMT/TLV method according to the embodiment.
  • the electronic device 2 receives part of the TLV stream sent by the television receiving device 1 through the interface 21.
  • the interface 21 performs transmission and reception with the interface 19 using media such as wired and wireless, and performs generation and decomposition of frame data in accordance with the communication protocol.
  • it has encryption and encryption decoding functions corresponding to the interface 19.
  • the partial TLV stream processing unit 22 processes the received partial TLV stream to obtain component data and SI data.
  • the component data is input to the decoder 23 together with the SI data, converted into service data, and output to the output processing unit 24.
  • the output time, display method, etc. are adjusted in the output processing unit 24, and output as images, audio, text, etc. from the output unit 25 such as a signal display device and a speaker.
  • the SI data output from the partial TLV stream processing unit 22 is input to the information source detection unit 26.
  • the information source detection unit 26 extracts related data (also referred to as reference information) contained in the SI data, and detects the source of the content such as the broadcast operator of the program from the related data.
  • the source of the detected content is input to the output processing unit 24, for example, as necessary, text information related to the source of the content is appropriately superimposed and displayed in the program being played.
  • the logo of the broadcasting operator may be displayed.
  • the correspondence relationship between the related data included in the SI data and the corresponding flag may be preset in the memory or the like of the electronic device 2 and used for display.
  • the corresponding relationship can also be included in the broadcast signal, and the corresponding relationship can be obtained from the broadcast signal received by the television receiver 1 and forwarded to the electronic device 2.
  • the electronic device 2 can receive the broadcast signal, it can be directly You can also get it via the Internet.
  • the related data extracted from the SI data can be stored as record data in a memory, and when connected to the Internet, it can also be output to the outside via the Internet.
  • the control unit 27 includes, for example, a CPU, and performs control of each function of the electronic device 2. For example, the control unit 27 performs connection establishment of external communication via various interfaces including the interface 21 and operation control of the information source detection unit 26. In addition, the control unit 27 controls various functions of the electronic device 2 based on control signals from a user interface 28 such as a remote control included in the electronic device 2.
  • the television receiving apparatus 1 and the electronic device 2 can be regarded as a relationship between a source and a sink (or a server and a client).
  • the television receiver 1 as the source (or server) outputs part of the TLV stream
  • the electronic device 2 as the sink (or client) receives part of the TLV stream output by the source.
  • the user specifies content (program) from the electronic device 2 which is the destination
  • the electronic device 2 obtains the related data contained in the SI data sent from the television receiver 1 which is the source, and makes the content
  • the source is clearly visible.
  • one electronic device 2 for example, electronic device 2A
  • the television receiver 1 the same processing can be performed on other electronic devices 2 (for example, electronic devices 2B, 2C).
  • the interface 19 of the television receiver 1 and the interface 21 of the electronic device 2 establish a communication connection according to a trigger from the electronic device 2.
  • a trigger from the electronic device 2.
  • the television receiving device 1 automatically transmits related data that makes the source of the program clearly visible.
  • FIG. 4 is a flowchart showing an example of processing operations of an electronic device on the server side of the television receiving apparatus corresponding to digital broadcasting based on the MMT/TLV method of the embodiment.
  • the control unit 110 of the television receiver 1 recognizes the specified content (a specific program, components in the program, etc.) of the electronic device 2 transmitted from the electronic device 2 (step S11).
  • the control unit 110 outputs the specified content to the partial TLV stream generation unit 18. If the partial TLV stream generating unit 18 receives the MMT/TLV stream from the demultiplexing unit 14, it extracts from the MMT/TLV stream the component data and associated SI data related to the specified content received from the control unit 110 (step S12 Yes, step S13).
  • the associated data is extracted from the extracted SI data (step S14).
  • three related data are extracted from the SI data.
  • the three related data are described in detail in the description of FIG. 5 and FIG. 6.
  • the television receiving device 1 needs to send the three related data network_id, tlv_stream_id, and service_id to the electronic device 2. Therefore, a partial TLV stream containing three related data is generated (step S15).
  • the partial TLV stream is a content format for advanced broadband digital satellite broadcasting defined with reference to the partial TS based on the MPEG-2 method.
  • the source of a broadcast program can be uniquely determined by network_id, transport_stream_id, and service_id. Therefore, in some TS, usually, as the associated data extracted from the broadcast signal, it also includes network_id, transport_stream_id, and service_id. In some TS, in order to transmit those related data, it is necessary to include control information tables such as PAT and PMT as transmission control information, and SIT as program related information. Transport_stream_id is recorded in PAT, service_id is recorded in PMT, and network_id is recorded in SIT.
  • HD High Definition
  • SD Standard Definition
  • the MH-SIT equivalent to the SIT for inclusion in the partial TLV stream is newly defined, and service_id is described, and then the MH-Network Identification Descriptor (Network Identification Descriptor) placed in the MH-SIT is newly defined.
  • Network Identification Descriptor Network Identification Descriptor placed in the MH-SIT.
  • control information table into which the reference information is put is not only put in one control information table, but is put into a plurality of control information tables separately, so that a plurality of reference information can be processed independently.
  • reference information it is not limited to transmission through the control information table.
  • the MH-SIT is defined by using the partial TS as a reference, and three related data are set in it, so that the communication will not be imposed. Part of the TLV stream is sent with a larger load.
  • FIG. 5 is a diagram showing an example of the configuration of the MH-SIT that is the control information table transmitted through the partial TLV stream in the embodiment.
  • service_id is set in the identifier 51.
  • service_id is a 16-bit field, which serves as a label for identifying the service from other services in the TLV stream.
  • the service identification is equal to the package ID (MMT_package_id_byte) in the MMT package table.
  • the segment syntax indicator is a 1-bit field and is always set to "1".
  • section_length specifies the number of bytes of the section from after this field to the end of the section including the CRC. In order to ensure that the maximum length of the entire segment does not exceed 4096 bytes, the segment length cannot exceed 4093 bytes.
  • This 5-bit field is the version number of the table.
  • the version number is increased by 1.
  • the current follow-up indicator is "1"
  • the version number becomes the version number of the current table.
  • the version number becomes the version number of the next table.
  • This 8-bit field indicates the number of the segment.
  • the segment number is 0x00.
  • This 8-bit field indicates the final segment number.
  • the final segment number is 0x00.
  • This 12-bit field indicates the total number of bytes of the descriptor describing the transmission parameters of the partial TLV stream.
  • This 3-bit field indicates the operation status of the original stream event. This is the running state of the current event of the original stream. If there is no current event in the original stream, the status is considered non-executing.
  • the meaning of the running status value is defined by ARIB STD-B60.
  • the 12-bit field specifies the full byte length of the descriptor loop, which includes the SI related information of the services and events contained in the following partial TLV streams.
  • FIG. 6 is a diagram showing an example of the structure of a descriptor transmitted by a partial TLV stream in this embodiment.
  • network_id is set for identifier 61
  • tlv_stream_id is set for identifier 62.
  • this descriptor is arranged in the descriptor area 52 in FIG. 5.
  • network_id is a 16-bit field, which describes the value of the network identification of the distribution system that has generated part of the TLV stream. In the original distribution system, this value is described in TLV-NIT, and the distribution of the field value is carried out by the designation of the standardization agency.
  • tlv_stream_id shows the identification number of the TLV stream. In the following, the meaning of other descriptors shown in FIG. 6 is shown.
  • This 24-bit field uses the 3-bit alphabetic code specified in ISO3166 to represent the country name. When this descriptor is used, it indicates the country where the distribution system of the partial TLV stream is generated. Each character is coded in 8-bit in accordance with ISO8859-1, and inserted into the 24-bit field in its order.
  • JPN Japanese three-digit letter code
  • the 16-bit field is inserted with a 2-bit letter code, and the 2-bit letter is used to indicate the type of media. In the case of using this descriptor, it indicates the media type of the distribution system that generated part of the TLV stream.
  • Each character is coded with 8 bits in accordance with ISO8859-1 and inserted into the 16-bit field in the order.
  • the types of media are as follows.
  • Network_id It is a 16-bit field that describes the value of the network identification of the distribution system that generates part of the TLV stream. In the original distribution system, the value is described in TLV-NIT, and the distribution of the value of the data field is carried out by the designation of the standardization agency.
  • the partial TLV stream generating unit 18 sets three related data for MH-SIT, and generates SI data for partial TLV streams (hereinafter referred to as partial SI data) including at least MH-SIT. ). Because service_id is included in PLT and MPT, network_id and tlv_stream_id are included in MH-SIT, and at least part of SI data is generated including PLT, MPT, and MH-SIT.
  • the partial TLV stream generating unit 18 generates component data for a partial TLV stream (hereinafter referred to as partial component data) based on the component data of the specified content, and generates a partial TLV stream based on the partial SI data and the partial component data (step S15).
  • service_id, network_id, and tlv_stream_id are described in the defined MH-SIT.
  • the identifier as the related data may be described in the MPT as another control information table.
  • network_id and tlv_stream_id are described in the MH-Network Identification Descriptor.
  • the data field in which tlv_stream_id is described in the MH-Network Identification Descriptor may not be provided instead
  • the choice can be recorded in reserved_future_use(16) of MH-SIT.
  • Part of the TLV stream is sent from the interface 19 (step 16). If the MMT/TLV stream cannot be received from the demultiplexing unit 14, the partial TLV stream generating unit 18 ends the processing (No in step S12).
  • FIG. 7 is a flowchart showing an example of the processing operation of the electronic device on the client side in this embodiment, and the electronic device 2 is used as the electronic device on the client side.
  • the partial TLV stream processing unit 22 of the electronic device 2 receives a partial TLV stream from the interface 21, it performs processing such as demultiplexing on the partial TLV stream and outputs partial component data and partial SI data (Yes in step S21, step S22).
  • processing such as demultiplexing on the partial TLV stream and outputs partial component data and partial SI data (Yes in step S21, step S22).
  • the partial TLV stream processing unit 22 performs descrambling processing (when the partial TLV stream is scrambled and encryption and decoding are required), the decoding Multiplexing processing.
  • the demultiplexing process part of the component data and part of the SI data are obtained from the part of the TLV stream.
  • the partial component data and partial SI data output from the partial TLV stream processing unit 22 are input to the decoder 22, and the decoder 22 is subjected to decoding processing to be converted into service data such as image signals, voice signals, and text data (step 23).
  • the service data is input to the output processing unit 24, the output time, display method, etc. are adjusted (step S24), and output from the output unit 25 such as a display device and a speaker (step S25).
  • the partial SI data output by the partial TLV stream processing unit 22 is input to the information source extraction unit 26, and the information source extraction unit 26 extracts related data from the partial SI data. Specifically, three related data of network_id, tlv_stream_id, and service_id are extracted from part of the SI data.
  • the information source extraction unit 26 determines the application area of the broadcast program in the advanced broadband digital satellite broadcasting based on the extracted three related data, and outputs it to the output processing unit 24 (step S26).
  • the output processing unit 24 adjusts the output time, display method, etc. of the application area information of the broadcast program input from the information source extraction unit 26, and then outputs the service data input from the decoder 23 to the output unit 25 (step S24 ), the output unit 25 outputs the area information of the broadcast program (step S25).
  • the interaction between the electronic devices 2A, 2B, 2C and the television receiver 1 can be performed at the same time.
  • the electronic devices 2A, 2B, 2C can be in the same
  • the same content can be obtained at the same time, and if the electronic devices 2A, 2B, and 2C designate different designated content respectively, then different content can also be obtained.
  • the three related data are included in the three tables of PAT, PMT, and SIT.
  • the three related data are put in MH-SIT. Data, thereby reducing the processing load and increasing the processing speed.
  • the transmission frequency is lower than that of other control information tables such as PLT and MPT. Therefore, it is different from the case where PLT and MPT are included. It also has the effect of reducing the processing load.
  • FIGS 8 to 12 are diagrams showing modified examples of the above-mentioned embodiment. Corresponding parts and similar parts of each module shown in the above-mentioned embodiment are denoted with the same or similar reference numerals.
  • FIG. 8 is a diagram showing an example of a network of advanced broadband digital satellite broadcasting according to Modification 1. It is shown that DIRD10A has the descrambling unit 13, demultiplexing unit 14, decoding unit 15, and output processing unit 16 in FIG. Examples of functions of the partial TLV stream generation unit 18, the interface 19, and the control unit 110.
  • This modified example shows an example of a case where the television receiver 1A is used as the server-side electronic device in the home network, and the smartphone 2BA and the tablet 2CA are used as the client-side electronic device 2.
  • Encryption and decoding functions can also be provided between the television receiver 1A and the respective electronic devices 2BA, 2CA.
  • the television receiving device 1A may be provided with a stream distribution management unit, and when a partial TLV stream is distributed, the stream distribution management unit manages its distribution information (number of distributions, distribution destination, etc.). Furthermore, the management information of the stream distribution management unit may be transferred to the charging management unit.
  • Fig. 9 is a block diagram showing an example of the functional configuration of a television receiving device corresponding to advanced broadband digital satellite broadcasting according to Modification 2. Parts corresponding to the functions of the television receiving device shown in Fig. 2 are marked with the same or similar Reference sign.
  • the demultiplexing unit 14 and the decoder 15 in FIG. 2 respectively correspond to the MMT demultiplexing unit 14A, the image decoding unit, the audio decoding unit, and the EPG multimedia decoder 15A.
  • the image decoding signal obtained from the image decoding unit is supplied to the display of the output unit, and the audio signal output from the audio decoding unit is supplied to the audio system (speaker system) of the output unit.
  • FIG. 10 shows an example of the operation of the television receiver 1A of FIG. 9 based on the control of the control unit 110A.
  • SA11 a signal
  • TV2 the second television receiver 2AA
  • SA12 the processing of the partial TLV stream is started
  • SA00, SA16 Part of the TLV stream is taken out from the MMT demultiplexing unit 14A and prepared, and output to the multiplexing unit 18A (SA00, SA16).
  • the control unit 110A generates reference information (SA13, SA14) as described in FIGS. 5 and 6, and outputs the reference information to the multiplexing unit 18A, and multiplexes it as a partial TLV stream in the multiplexing unit 18A (SA15).
  • SA15 the partial TLV stream in which the MH-SIT including the reference information is multiplexed is transmitted to the television receiver 2B (SA17).
  • the network_id, tlv_stream_id, and service_id used to determine the source can also be inserted and multiplexed in any position and format in some TLV streams.
  • the transmission time can also be changed, and it can also be the transmission start time of the partial TLV stream.
  • FIG. 11 shows a configuration example of a television receiving device 2AA that receives a part of the TLV stream transmitted by the television receiving device 1A in this modification.
  • the functional configuration of the television receiving device 2AA is the same as that of the television receiving device 1A shown in FIG. 9, and the functional modules corresponding to each other are marked with similar reference numerals.
  • the reference numerals 12A, 13A, 14A... of the television receiving device 1A shown in FIG. 12 and the reference numerals of the television receiving device 2AA are described as 2A12, 2A13, 2A14....
  • the partial TLV stream transmitted from the television receiver 1A is input to the demultiplexing unit 2A18 via the interface 21A, and the above-mentioned reference information is analyzed in the control unit 2A110, so that the source of the content of the partial TLV stream becomes clear.
  • the MMT/TLV stream is input to the MMT demultiplexing unit 2A14, and the image coded data and audio coded data of the packet are taken out, and decoded in the image decoding unit and audio decoding unit, respectively.
  • Fig. 12 is a flowchart showing an example of the operation of the television receiver 2AA of Fig. 11. If there is a receiving instruction or receiving request for a part of the TLV stream, the receiving process of the part of the TLV stream is started (SB11, SB12).
  • the control unit 2A110 analyzes the reference information multiplexed in the partial TLV stream, and determines the source of the content multiplexed in the stream (SB13, SB14, SB15). On the other hand, the content multiplexed in the stream is processed in the output processing unit 2A15 and output as data for display and voice output (SB20). If the reception of part of the TLV stream is not stopped, the display of the content multiplexed in the stream is continued. However, if an operation such as shutdown of the receiving device or receiving stop is performed, the above-mentioned operation is stopped (SB21).
  • an example of a case where an MMT/TLV stream is acquired from a broadcast signal received from a tuner is shown.
  • MMT/TLV stream acquired via the Internet.
  • the MMT/TLV stream may be temporarily stored in a storage device (not shown) or the like, and its data may be input to, for example, the demultiplexing unit 14 in FIG. 2 to generate a partial TLV stream.
  • a transmission device including: a receiving unit that receives a broadcast signal using the MMT/TLV method as a content format; a tuner that selects a desired TLV stream from the broadcast signal; and an extraction unit that serves as a control
  • the SI (Signaling Information) of the signal extracts at least the network identifier (network_id), the tlv stream identifier (tlv_stream_id), and the service identifier (service_id) from the SI (Signaling Information); and a part of the TLV stream generation unit, which generates reference information and Part of the TLV stream including the TLV stream selected by the tuner, wherein the reference information includes a network identifier (network_id), a tlv stream identifier (tlv_stream_id), and a service identifier (service_id).
  • a transmission method of a transmission device having: a receiving unit that receives a broadcast signal using an MMT/TLV method as a content format; a tuner that selects a desired TLV stream from the broadcast signal; And the control department, where,
  • At least the network identifier (network_id), the tlv stream identifier (tlv_stream_id), and the service identifier (service_id) are extracted from SI (Signaling Information) as a control signal, and the Output part of the TLV stream including reference information and the TLV stream selected by the tuner, where the reference information includes the network identifier (network_id), the tlv stream identifier (tlv_stream_id), And the service identifier (service_id).
  • (B1) A receiving device, wherein the TLV stream included in a part of the TLV stream corresponds to a TLV stream selected from a broadcast signal using the MMT/TLV method as the content format, a network identifier (network_id), a tlv stream identifier (tlv_stream_id) and service identifier (service_id) are identifiers extracted from the SI included in the broadcast signal as the control signal, and are defined as information for the partial TLV stream included in one table
  • the reference information at least network_id, tlv_stream_id, and service_id used to determine the source are inserted into the reference information, and the partial TLV stream is sent as a stream that includes the reference information and the TLV stream,
  • the receiving device includes:
  • the receiving part which receives the part of the TLV stream, and
  • the determination unit analyzes the network_id, tlv_stream_id, and service_id included in the reference information, and determines the source of the content of the partial TLV stream.
  • (B2) A receiving method for a receiving device, wherein the TLV stream included in a part of the TLV stream corresponds to a TLV stream selected from a broadcast signal that uses the MMT/TLV method as the content format, and the network identifier (network_id), tlv stream
  • the identifier (tlv_stream_id) and the service identifier (service_id) are the identifiers extracted from the SI (Signaling Information: signaling signal) as the control signal included in the broadcast signal, and are used as part of the TLV
  • At least network_id, tlv_stream_id, service_id used to determine the source are inserted into the reference information defined by the information of the stream, and the partial TLV stream is sent as a stream including the reference information and the TLV stream,
  • a receiving device having a receiving unit and a control unit receives the partial TLV stream, and analyzes the network identifier (network_id), the tlv stream identifier (tlv_stream_id), and the service identifier (service_id) included in the reference information , To determine the source of the content of the partial TLV stream.
  • network_id network identifier
  • tlv_stream_id tlv_stream_id
  • service_id service identifier
  • (D) It may also have a mechanism for further outputting the identification data of the source to the display unit when the source of the part of the TLV stream is clarified, and/or it may also have a mechanism for the source of the part of the TLV stream In the case of this, a mechanism that further outputs the unique audio data of the source to the audio output unit.
  • the television receiving device may include a stream distribution management unit that, when the partial TLV stream is distributed, manages its distribution information (number of distributions, distribution destinations, etc.). Furthermore, the management information of the stream distribution management unit may be transferred to the charging management unit.
  • This system includes a mechanism that defines the MH-SIT equivalent to the selection information table (SIT) multiplexed in the broadcast signal using the MMT/TLV method, and transmits and receives the MH-SIT.
  • the MH-SIT is the reference information that includes the network identifier (network_id), tlv stream identifier (tlv_stream_id), and service identifier (service_id), and it can be based on the three identifiers. Judging the information of the source of the content contained in the partial TLV stream.
  • a digital content sending device and sending method which adopts a partial stream content format, so that the area of a broadcast program sent based on the MMT/TLV method is clearly visible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un appareil et un procédé d'émission de contenu numérique, ainsi qu'un appareil et un procédé de réception de contenu numérique, qui rendent claire et visible la zone d'un programme de radiodiffusion émise sur la base d'un mode MMT/TLV sous la forme d'un contenu de flux partiel. L'appareil d'émission de contenu numérique selon un mode de réalisation comporte une partie de réception, une partie d'acquisition et de séparation, une partie de génération de flux partiel, et une partie d'émission. La partie de réception reçoit un signal d'émission émis sur la base d'un mode MMT/TLV; la partie d'acquisition et de séparation acquiert un flux MMT/TLV à partir du signal d'émission, et sépare, à partir du flux MMT/TLV, des données de composante liées à un contenu spécifique, et des premières données d'informations de commande; la partie de génération de flux partiel extrait, à partir des premières données d'informations de commande, des données associées servant à apprendre la source du contenu spécifique, et génère un flux partiel d'après des secondes données d'informations de commande générées et incluant les données associées, et les données de composante; et la partie d'émission émet le flux partiel.
PCT/CN2020/098170 2019-06-28 2020-06-24 Appareil et procédé d'émission de contenu numérique, et appareil et procédé de réception de contenu numérique Ceased WO2020259604A1 (fr)

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JP2019121939A JP7146702B2 (ja) 2019-06-28 2019-06-28 デジタルコンテンツ送信装置
JP2019121938A JP7247036B2 (ja) 2019-06-28 2019-06-28 デジタルコンテンツ送信方法
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