WO2021008465A1 - Digital content sending device and method, and digital content receiving device and method - Google Patents

Abstract

The present application provides a digital content sending device and method, and a digital content receiving device and method by which a 2K receiving device can use a content form of a partial transport stream (TS) of 4K/8K broadcast content. The digital content sending device involved in one embodiment has a receiving part, a TLV stream obtaining part, a component data obtaining part, a code conversion part, a partial TS generation part, and a sending part, receives a sending signal sent on the basis of an MMT/TLV mode, obtains a TLV stream from the sending signal, obtains component data involved in specific content from the TLV stream, converts the component data into MPEG-2 TS mode-based element stream data, locally generates a MPEG-2 TS mode-based partial TS using association data involved in attribute information comprising the element stream data and the specific content, and sends the partial TS.

Description

Digital content sending device, sending method, digital content receiving device, and receiving method

This application requires a Japanese patent application filed with the Japanese Patent Office with an application number of 2019-129888 and titled "Digital Content Delivery Device, Transmission Method" on July 12, 2019, and a Japanese patent application filed with the Japan Patent Office on July 12, 2019 The priority of the Japanese patent application with the application number 2019-129895 and the name "Digital Content Receiving Device, Receiving Method", the entire content of which is incorporated into this application by reference.

Technical field

The embodiment relates to a digital content sending device, a sending method, a digital content receiving device, and a receiving method.

Background technique

In advanced broadband digital broadcasting, 4K broadcasting or 8K broadcasting based on the MMT/TLV method (hereinafter referred to as 4K/8K broadcasting) is implemented. The content of 4K/8K broadcast received by the corresponding 4K/8K receiving device can be output to the external electronic equipment through the IP interface according to the prescribed program.

Assuming that the electronic device that receives the above content output is a 2K receiving device corresponding to BS/Broadband CS digital satellite broadcasting and terrestrial digital broadcasting (hereinafter referred to as 2K broadcasting), the 4K/8K receiving device corresponding to the distribution source usually 4K /8K broadcast service data (image data, audio data, text data, etc. before being encoded) is converted into service data that can be corresponded to by the 2K receiving device, and output as a partial transport stream (hereinafter referred to as partial TS), Wherein, the partial transport stream is a content format based on the MPEG-2TS method, which is a broadcasting method corresponding to 2K broadcasting.

When part of TS is output through the IP interface, it is output based on the ARIB.OR.JP_PN configuration file (encoding method, transport packet format and stream format. hereinafter referred to as AOJ configuration file.) described in ARIB STD-B21 9.2. Therefore, when the 4K/8K receiving device sends content data to the 2K receiving device, the 4K/8K receiving device generates a partial TS based on the AOJ configuration file.

Prior technical literature

Non-patent literature

Non-Patent Document 1: ARIB STD-B63 Version 1.7 "Advanced Broadband Satellite Data Broadcast Receiving Device" Standard Specification

Non-Patent Document 2: ARIB TR-B39 Version 2.0 "Regulations on the Operation of Advanced Broadband Satellite Data Broadcasting" (Volume 1) Part 2

Non-Patent Document 3: ARIB STD-B21 Version 5.10 "Receiving Device for Digital Broadcasting" Standard Specification

Non-Patent Document 4: ARIB TR-B15 Version 7.7 "BS/Broadband CS Data Broadcast Operation Regulations" (Volume 1) Part 2

Summary of the invention

However, the AOJ profile basically does not correspond to 4K/8K broadcasting, and the conversion and output by the 4K/8K receiving device into a partial TS based entirely on the existing AOJ profile (hereinafter referred to as AOJ partial TS) is a heavy processing load and difficult. , It is essentially unable to output the same AOJ part TS as when receiving 2K broadcast. Therefore, the 2K receiving device cannot receive the service data converted by the 4K/8K receiving device and use it with high quality.

Therefore, the subject to be solved by this application is to provide a digital content transmitting device, transmission method, and digital content receiving device and receiving method using a partial TS content format that can use 4K/8K broadcast content by a 2K receiving device.

The digital content sending device according to the embodiments of the present application includes: a receiving unit, a TLV stream acquiring unit, a component data acquiring unit, a transcoding unit, a partial transport stream generating unit, and a sending unit. The receiving unit receives the transmission based on the MMT/TLV method. Signal, the TLV stream acquisition unit acquires the TLV stream from the transmission signal, the component data acquisition unit acquires component data related to specific content from the TLV stream, and the transcoding unit converts the component data into MPEG-2TS based The elementary stream data of the method, the partial transport stream generating unit generates a partial transport stream based on the MPEG-2TS method, the partial transport stream includes the element stream data and the associated data related to the attribute information of the specific content, and the sending unit sends The part of the transport stream.

The digital content receiving device according to one embodiment includes: a receiving unit, a partial transport stream processing unit, and a processing judgment unit, which receive a partial transport stream based on the MPEG-2TS method, and the partial transport stream includes the transmission based on the MMT/TLV method. The element stream data obtained by transcoding the component data of the specific content and the associated data related to the attribute information of the specific content are extracted from the partial transport stream, and the associated data related to the element stream data and the attribute information of the content are extracted from the related data. The processing content of the element stream data.

Description of the drawings

1 is a diagram showing an example of a 4K/8K receiving device corresponding to digital broadcasting based on the MMT/TLV method and a 2K compatible electronic device corresponding to digital broadcasting based on the TS method according to the first embodiment;

2 is a block diagram showing an example of the functional configuration of a 4K/8K receiving device according to the embodiment;

3 is a block diagram showing an example of the configuration of a partial TS generating unit of the 4K/8K receiving device according to the embodiment;

4 is a block diagram showing an example of the functional configuration of the 2K compatible electronic device according to the embodiment;

5 is a flowchart showing an example of the processing operation of the electronic device on the information source side as the 4K/8K receiving device according to the embodiment;

6A is a diagram showing an example of the structure of SIT transmitted by partial TS according to the embodiment;

6B is a diagram showing an example of the meaning of an identifier transmitted by SIT according to the embodiment;

FIG. 7 is a flowchart showing an example of the processing operation of the 2K-compatible electronic device on the client side according to the embodiment;

8 is a flowchart showing an example of the operation of the second control information data processing in the 2K-compatible electronic device on the client side according to the embodiment;

FIG. 9A is a diagram showing an example of the structure of a descriptor transmitted in a partial TS according to a modification;

FIG. 9B is a diagram showing an example of the meaning of descriptor data transmitted in a partial TS according to a modification.

Description of reference signs

1···TV receiver, 2.··Electronic equipment, 14···Demultiplexing section, 15···Decoding section, 18···Partial TS generating section, 19···Interface, 21··· Interface, 22...Partial TS processing unit, 23...Decoding unit, 24...Output processing unit, 25...Output unit, 26...SIT analysis unit, 27...Control unit, 28... ··User interface, 110···Control part.

Detailed ways

Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)

FIG. 1 is a diagram showing an example of a 4K/8K receiving device compatible with digital broadcasting based on the MMT/TLV method and a 2K compatible electronic device compatible with digital broadcasting based on the TS method according to the present embodiment.

The television receiving device 1 as a 4K/8K receiving device receives a broadcast signal of data broadcasting based on the MMT/TLV method, and obtains content (broadcast image, etc.) transmitted by the broadcast signal. The television receiving device 1 converts the obtained content into a format usable by the electronic device 2 and transmits it via the interface 3.

The electronic equipment 2A, the electronic equipment 2B, and the electronic equipment 2C (referred to as the electronic equipment 2 if no special distinction is required) obtain the content transmitted from the television receiver 1 via the interface 3 and display and output the content. In addition, in the present embodiment, the number of electronic devices 2 is three, but depending on the interface of the television receiver 1, any number of one or more can be set.

The electronic device 2 of this embodiment has a function (resolution, frame rate, etc.) capable of using all or part of the content transmitted by the television receiver 1. The electronic device 2 may also be, for example, a tablet computer terminal, a monitor, a television receiver, and the like. In addition, as long as it has an interface capable of communicating with the television receiving device 1, the electronic device 2 can also be used as a smart phone.

The interface 3A, the interface 3B, and the interface 3C (referred to as the interface 3 when there is no need to distinguish them) are the interfaces used by the television receiver 1 and the electronic device 2 for data communication, and they can be wired or wireless. In addition, as the interface 3, DLNA (registered trademark) (Digital Living Network Alliance) or a network based on its expansion method can also be used, so that the television receiving device 1 and the electronic device 2 can communicate.

2 is a block diagram showing an example of the functional configuration of the 4K/8K receiving device according to the same embodiment.

The television receiving device 1 receives the broadcasting signal of digital broadcasting based on the MMT/TLV method through the antenna 11, and obtains the digital data in the form of TLV (Type Length Value) by demodulating or error correction decoding the broadcasting signal through the tuner 12 (TLV stream). The acquired TLV stream descrambles the descrambled data through the descrambling unit 13 and is output to the demultiplexing unit 14.

The demultiplexing unit 14 converts the input TLV stream into an IP/UDP transport stream, and further into an MMT (MPEG Media Transport) transport stream, and separates it into component data (for example, encoded image data, sound data, text data, etc.) And SI (Signaling Information) data as control information data. In addition, the demultiplexing unit 14 separates the time information data in the NTP format stored in the TLV stream in the IP/UDP format, and outputs it as a part of the SI data.

The decoding unit 15 decodes the component data into service data such as image signals, voice signals, and text data and plays them. In addition to the component data, SI data is input to the decoding unit 15 or a content specification command is input from the control unit 110. SI data is control information related to the broadcasting system, such as information related to broadcast programs, control information related to multiplexing of IP data packets. The decoding unit 15 uses the component data of the program and service data designated by the SI data selection control unit 110 to decode the selected component data to obtain service data. There are two outputs from the decoding unit 15 in FIG. 2 in this embodiment. One of the service data obtained by the decoding unit 15 is input to the output processing unit 16, and the output time, display method, etc. are adjusted from the display device, speaker, etc. The output unit 17 outputs. It should be noted that the clock synchronization signal is reproduced by the time information data output by the demultiplexing unit 14 and used for time control in the output processing unit 16. The other service data is output to the partial TS generating unit 18.

The partial TS generating units 18A, 18B, and 18C (referred to as the partial TS generating unit 18 when no special distinction is required) are based on the SI data input from the demultiplexing unit 14 and the service data input from the decoding unit 15 (hereinafter referred to as Partial service data) to generate a partial TS, and output to the interface 19.

Part of TS is a content format based on MPEG-2TS. Generally, at least one HD (High Definition) or SD (Standard Definition) program is a 2K broadcast broadcast signal multiplexed in TS mode The superimposed transport stream (hereinafter, referred to as a full TS when described separately from the partial TS) is selected to extract a specific program and components in the program to obtain a partial TS. In this embodiment, the television receiver 1 as a 4K/8K receiver outputs the partial TS, and the electronic device 2 corresponding to 2K receives the partial TS. Part of TS is sent from interface 19.

The television receiver 1 may include one or more interfaces, and FIG. 2 shows an example in which an interface 19A, an interface 19B, and an interface 19C (referred to as an interface 19 if no distinction is required) are provided. The interface 19A, the interface 19B, and the interface 19C generate and decompose the frame data corresponding to each predetermined communication protocol, and perform transmission and reception through media such as wired and wireless. The interface 19 may have encryption and decryption functions such as descrambling.

In addition, when the interface 19 is used as an IP interface, ARIB STD-B21 specifies that the ARIB.OR.JP_PN configuration file (hereinafter referred to as the AOJ configuration file) is transmitted as metadata. The AOJ configuration file indicates the content specification when the partial TS is output from the television receiving device 1. ARIB STD-B21 specifies the encoding method, transport packet format, and stream format. By transmitting the AOJ configuration file as metadata, it becomes a structure that ensures the reception and playback display in the electronic device 2 (for example, reception and playback display device, etc.) of the distribution destination.

However, the advanced broadband digital broadcasting as 4K/8K broadcasting is different from the previous BS/Broadband CS digital satellite broadcasting and terrestrial digital broadcasting as 2K broadcasting. A large number of new methods and formats are introduced, most of which are in the existing AOJ profile. Has not been considered and specified. In this case, although the method of sending based not on the AOJ configuration file but based on a separate configuration file is also considered, there is a problem that the receivers that can correspond to this are limited. Therefore, even if the TV receiving device 1 converts 4K/8K broadcast content into a format that can be used by the electronic device 2, it cannot show all the methods and formats in the AOJ profile. Therefore, even if the electronic device 2 has the TV receiving device 1 that can be partially used The converted 4K/8K broadcast content function also has a problem that the television receiving device 1 cannot transmit under the premise of this function.

In addition, when the television receiving device 1 generates a partial TS based on the AOJ profile, various conversions are required in addition to the resolution, and the processing load is heavy and substantially difficult. In particular, since the character codes are not completely matched in the code system, it is impossible to avoid character loss and garbled characters caused by conversion. In addition, in image format conversion, it is difficult to perform processing with sufficient consideration of the playback image quality. Therefore, even if it is permitted by the standard specifications, there is a problem that the corresponding receiving device (electronic device 2) that supports the pixel number conversion output function for transmission to high-level broadband digital broadcasting, such as HD (High Definition), is not widely spread. Therefore, in this embodiment, the SIT includes the attribute information of the content and transmits the partial TS. The SIT transmission frequency defined in the partial TS is small and the communication load is also small. For the transmission of partial TS using SIT, the detailed content will be explained through the operation instructions of the system.

The control unit 110 includes, for example, a CPU, and controls various functions 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 TS generation unit 18 or the decoding unit 15, and the like. In addition, the control unit 110 controls various functions of the television receiving device 1 based on control signals from the user interface 111 such as a remote control included in the television receiving device 1.

3 is a block diagram showing an example of the configuration of a partial TS generating unit of the 4K/8K receiving device according to the same embodiment.

The partial PSI (Program Specific Information)/SI (Service Information) generating unit 181 obtains SI (Signalling Information) data based on the MMT/TLV method from the demultiplexing unit 14, and obtains information of the specified content from the control unit 110. Extract the SI data related to the content specified by the specified content from the obtained SI data. Based on the extracted SI data, a transmission control information table (hereinafter referred to as the first control information data), SIT and other program-related information tables (hereinafter referred to as the " Is the second control information data). Here, the transmission control information table is PSI (Program Specific Information), and the program-related information table is SI (Service Information). The partial PSI/SI generating unit 181 outputs the first control information data and the second control information data to the multiplexing unit 184.

The conversion unit 182 converts part of the service data input from the decoding unit 15. Specifically, the number of pixels of an ultra-high-resolution image broadcast by 4K/8K broadcasting is converted into the number of pixels of 1920×1080 or less, which is the number of pixels of HD (High Definition). The conversion may be accompanied by, for example, changing the scanning method of the image from a progressive method (sequential scanning method) to an interlace method (a step-by-step operation method). The electronic device 2 of the present embodiment also has an electronic device 2 that can display an image with the number of pixels below HD converted by the conversion unit 182. In addition, the method used by the conversion unit 182 may be designated by the control unit 110 to the conversion unit 182, or the conversion unit 182 may perform conversion by a method predetermined as the specifications of the television receiving device 1. The converted partial service data is called conversion service data, and the conversion unit 182 outputs the conversion service data to the encoding unit 183.

The encoding unit 183 encodes the input conversion service data and outputs it to the multiplexing unit 184. The encoding method may be designated by the control unit 110 to the encoding unit 183, or the encoding unit 183 may perform encoding by an encoding method predetermined as the specifications of the television receiver 1. The encoded conversion service data is called partial element stream data, and the encoding unit 183 outputs the partial element stream data to the multiplexing unit 184. Since the decoding unit 15, the conversion unit 182, and the encoding unit 183 have functions of converting TLV-based component data into TS-based elementary stream data, the combination of these three functions is also called a transcoder.

The multiplexing unit 184 generates a partial TS based on the partial PSI/SI data and the partial elementary stream data, and outputs the partial TS to the interface 19.

4 is a block diagram showing an example of the functional configuration of a 2K compatible electronic device according to the same embodiment. The electronic device 2 as a 2K-compatible electronic device receives the partial TS sent by the television receiver 1 through the interface 21. The interface 21 is an interface corresponding to the interface 19, and performs transmission and reception through media such as wired and wireless, and generation and decomposition of frame data corresponding to a communication protocol. In addition, it has encryption and decryption functions corresponding to the interface 19.

The partial TS processing unit 22 processes the received partial TS, and acquires partial elementary stream data and partial PSI/SI data. Specifically, the partial TS processing unit 22 extracts partial elementary stream data from the partial PSI/SI data based on the first control information of PAT and PMT. Part of the elementary stream data is input to the decoding unit 23, converted into partial service data, and output to the output processing unit 24. Part of the service data is adjusted by the output processing unit 24 to output time, display method, etc., and is output as images, audio, text, etc. from the output unit 25 such as a signal display device and a speaker.

In addition, the SIT in the partial PSI/SI data output from the partial TS processing unit 22 is input to the SIT analysis unit 26. The SIT analysis unit 26 outputs data such as program-related information included in the SIT to the output processing unit 24. In addition, in this embodiment, the SIT analysis unit 26 extracts related data (identifiers, etc.) related to content attributes, and detects attribute information of the content related to the content such as encoding method and format from the related data. The SIT analysis unit 26 generates processing control information and outputs it to the decoding unit 23 and the output processing unit 24, where the processing control information indicates whether the detected attributes of the content can be corresponded in the electronic device 2. The decoding unit 23 decodes the partial elementary stream data based on the processing control information, and outputs the obtained partial service data to the output processing unit 24. The output processing unit 24 outputs the partial service data to the output unit 25 based on the processing control information, and the output unit 25 outputs the content based on the partial service data.

It should be noted that the output processing unit 24 outputs the processing control information to the output unit 25, and may also be displayed as text information, for example. In addition, as for the associated data related to the content attribute, it is also possible to use interfaces not used in the transmission and reception of some TSs in the interface 19 and the interface 21 (for example, interfaces 19C and 21C), and use the interfaces used in the transmission and reception of some TS except Interface specifications other than the communication protocol are acquired by the electronic device 2. In this case, in the television receiving device 1, there is no need to put the associated data related to the content attribute in the SIT transmitted through the partial TS.

In addition, the related data related to the content attributes extracted by the SIT analysis unit 26 may be stored in a memory not shown. In this case, when the communication connection with the television receiver 1 is established, it is not necessary to obtain the SIT. In the electronic device 2, the related data related to the content attribute of the television receiver 1 is used.

The control unit 27 includes, for example, a CPU, and controls various functions 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 SIT analysis unit 26. In addition, the control unit 27 controls various functions of the electronic device 2 based on a control signal from a user interface 28 such as a remote control included in the electronic device 2. For example, the user can also specify whether to use the SIT analysis unit 26 through the remote control.

An operation example of the system according to this embodiment will be described.

The television receiver 1 and the electronic device 2 can also be regarded as the relationship between the source and the sink (or the server and the client). For example, the television receiver 1 as the source (or server) outputs the partial TS, and the electronic device 2 as the sink (or client) receives the partial TS output by the source. In this embodiment, the following example is shown: the user specifies the content (program) from the electronic device 2 as the sink, and the electronic device 2 obtains the attribute information of the content from the partial TS sent by the television receiver 1 as the source, and controls The output display of the content.

The processing between one electronic device 2 (for example, electronic device 2A) and the television receiver 1 is shown below, but the same processing can be performed on other electronic devices 2 (for example, electronic devices 2B, 2C).

When the user specifies content (program) from the electronic device 2, the interface 19 of the television receiver 1 and the interface 21 of the electronic device 2 establish a communication connection by a trigger from the electronic device 2.

5 is a flowchart showing an example of the processing operation of the electronic device on the server side as the 4K/8K receiving device according to the same 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). When the control unit 110 confirms the reception of the TLV stream in the tuner unit 12 and the descrambling unit 13 (YES in step S12), it outputs the specified content to the partial TS generating unit 18. The TLV stream is separated into component data and SI data in the demultiplexing unit 14, and the SI data is input to the partial TS generating unit 18. When the partial TS generating unit 18 receives the SI data from the demultiplexing unit 14, it extracts the related SI data related to the specified content received from the control unit 110 (step S13). Specifically, the associated SI data is transmission control information such as PLT and MPT, and program-related information such as MH-SDT and MH-EIT.

The partial TS generating unit 18 uses the extracted associated SI data to generate the first control information data and the second control information data included in the partial TS (step 14). Specifically, the content of PLT, MPT, etc. included in the associated SI data is converted into the content form of partial TS such as PAT, PMT, etc., thereby generating the first control information data. The content of MH-SDT, MH-EIT, etc. contained in the associated SI data is converted into the content form of the partial TS of the SIT, thereby generating the second control information data. In addition, in order to indicate that the SI information is not continuous, DIT (Discontinuity Information Table) is inserted as needed.

The generation of the second control information data of this embodiment is shown in more detail.

6A is a diagram showing an example of the structure of the SIT transmitted through the partial TS according to the same embodiment. The attribute data 6A of the content in the figure is a part of the reserved area (reserved_future_use) in the original SIT. In this embodiment, three identifiers related to the attributes of the content transmitted through the partial TS are defined in the reserved area in the SIT. Three identifiers are used as attributes of content not specified in the AOJ configuration file.

·Character_encoding_flag (character encoding recognition)

Character encoding recognition (1-bit flag) indicates the recognition of the program arrangement information in the partial TS and the character encoding used in the subtitles. It is set to "1" in the case of 8-unit encoding, and in the case of UTF-8 "0".

· Original_video_scan_flag (image scan flag)

The image scan flag (1-bit flag) is set to "1" when the original image signal is an interlace signal, and is set to "0" in the case of a progressive signal.

·Original_transfer_characteristics (image signal transmission characteristics)

The image signal transmission characteristics (2-bit field) identify the transmission characteristics of the original image signal, and advance the encoding according to the value shown in FIG. 6B. It should be noted that this value can also be replaced with original_video_transfer_characteristics.

The transfer_characteristics of the VUI in FIG. 6B indicates the transfer characteristics of the image signal, and indicates the transfer characteristics of the image signal specified in correspondence with each value.

It should be noted that although in FIG. 6A of the present embodiment, three identifiers specifying the method/format are set, only a part of the identifiers may be set. In addition, since the fields of other reserved areas (reserved_future_use) in the SIT are all set to 1 by default, as shown in this embodiment, 0 is set when an unspecified method/format is specified.

The meaning of the other identifiers shown in FIG. 6A is shown below.

Section_syntax_indicator (section syntax indication)

The segment syntax indication is a 1-bit field and is always set to 1.

·Section_length (section length)

Set it to a 12-bit field. 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.

·Version_number (version number)

This 5-bit field is the version number of the table. When there is a change in the information in the table, the version number is increased by 1. When the value becomes 31, it returns to 0. In the case where the current subsequent indicator is 1, the version number becomes the version number of the current table. In the case where the current subsequent indicator indicates 0, the version number becomes the version number of the next table.

· Current_next_indicator (current subsequent indicator)

When the one-bit indicator is 1, it means that the table is the current table, and when it is 0, it means that the sent table is not yet applicable and is used as the next table.

·Section_number (section number)

This 8-bit field indicates the number of the segment. The segment number is 0x00.

·Last_section_number (last section number)

This 8-bit field indicates the final segment number. The final segment number is 0x00.

·Transmission_info_loop_length (transmission information loop length)

This 12-bit field indicates the number of full bytes in a broad sense describing the transmission parameters of the partial transport stream.

·Service_id (service identification)

This is a 16-bit field that serves as a tag for identifying the service from other services in the transport stream. The service identification is the same as the broadcast program identification (program_number) in the program diagram.

·Running_status (running status)

This 3-bit field indicates the running status of the event of the original transport stream. This is the current event running state of the original transport stream. If there is no current event in the original transport stream, the state is considered non-executing. The meaning of the running status value is defined in ARIB-STD-B10.

·Service_loop_length (service loop length)

The 12-bit field specifies the full byte length of the descriptor loop, which includes the following SI related information of the services and events contained in the following continuous partial transport streams.

·CRC_32(CRC)

This is a 32-bit field and contains the following CRC value: In the decoder defined in Appendix B of ARIB-STD-B10, the register output becomes zero after processing the entire segment.

As shown in FIG. 6A, the partial PSI/SI generating unit 181 includes attributes that are not specified in the AOJ configuration file as identifiers, and further includes program-related information obtained from MH-EIT, MH-SDT, etc., to generate SIT (step S14) . The partial PSI/SI generating unit 181 outputs the generated first control information (PAT, PMT) and second control information (SIT) as partial PSI/SI data to the multiplexing unit 184 (step S15).

Returning to step S12, when the control unit 110 confirms that the TLV stream is received in the tuner unit 12 and the descrambling unit 13 (Yes in step S12), the control unit 110 outputs the specified content to the decoding unit 15. The decoding unit 15 uses the SI data to extract component data of the program and service data specified by the specified content, decodes the extracted component data, and obtains partial service data. In the present embodiment, for example, the encoding method of image signals is set to HEVC, the encoding method of voice signals is set to MPEG-4AAC, and the encoding method of text data is set to UTF-8, and the decoding unit 15 applies to each component data, Decoding is performed by a method corresponding to each encoding method, and part of the service data is output to the conversion unit 182. The conversion unit 182 outputs conversion service data that converts the number of pixels of the super high-resolution image signal of the input service data provided by 4K/8K broadcasting into, for example, the number of pixels of HD, 1920×1080 (step S16). In this embodiment, it is set, for example, that the image signal received by the original progressive scanning method is changed to the interlaced scanning method to generate conversion service data. The scanning mode is reflected as the original_video_scan_flag of the SIT shown in FIG. 6A, and “0” is set by the partial PSI/SI generating unit 181.

The converted service data for all partial service data is generated and output to the encoding unit 183. The encoding unit 183 performs encoding that can be transmitted through partial TS for the input conversion service data. For example, for image signals, encoding methods based on MPEG-2 Video, H.264, etc. are used, for voice signals, encoding methods based on MPEG-2 ACC are used, and for text data, encoding methods based on UTF-8 are used. The encoding method used here is reflected in the partial PSI/SI generating unit 181 as the identifiers character_encoding_flag and original_transfer_characteristics shown in the SIT of FIG. 6A. Specifically, the partial PSI/SI generation unit 181 sets "0" in character_encoding_flag in order to indicate that the encoding method for text data is UTF-8. In addition, the partial PSI/SI generating unit 181 sets "10" in the identifier original_transfer_characteristics of the SIT, for example, when the original broadcast image signal used is the BT.2100HLG method. The encoding unit 183 outputs the encoded conversion service data (partial elementary stream data) to the multiplexing unit 184 (step S17).

The multiplexing unit 184 generates a partial TS based on the partial elementary stream data output by the encoding unit 183 and the partial PSI/SI data including the first control information and the second control information generated by the partial PSI/SI generation unit 181 (step S18 ), the partial TS is sent from the interface 19 to the outside such as the electronic device 2 (step S19).

As described above, by specifying new methods and formats in the partial TS that are not specified in the existing configuration files, such as the AOJ configuration file, it is possible to convert the new AOJ configuration file without converting the AOJ configuration file in the television receiver 1 as the distribution source. The method and format are included in part of TS. The television receiver 1 can reduce the load caused by the conversion and output processing of the AOJ profile.

7 is a flowchart showing an example of the processing operation of the 2K-compatible electronic device on the client side according to the same embodiment.

When the partial TS processing unit 22 of the electronic device 2 receives the partial TS from the interface 21, it performs processing such as demultiplexing on the partial TS and outputs partial elementary stream data and partial PSI/SI data (Yes in step S21, step S22). In step 22, the partial TS processing unit 22 performs descrambling processing (when the partial TS is subjected to scramble processing and decryption is required) and demultiplexing processing in the same way as the electronic equipment corresponding to 2K broadcasting receives the conventional partial TS. .

The partial TS processing unit 22 determines partial elementary stream data from the partial PSI/SI data based on the first control information data of PAT and PMT, and inputs the partial elementary stream data to the decoding unit 23. In addition, the partial TS processing unit 22 inputs the SIT as the second control information data to the SIT analysis unit 26. The decoding unit 23 and the SIT analysis unit 26 respectively process the input data. The SIT analysis unit 26 generates processing control information based on the SIT (step S23).

Fig. 8 is a flowchart showing an example of the operation of the second control information data processing of the 2K compatible electronic device on the client side according to the same embodiment, and shows in detail the flowchart of step S23 in Fig. 7.

The SIT analysis unit 26 acquires program-related information from the SIT in the same manner as the SIT processing for the conventional partial TS (step S2601). On the other hand, the SIT analysis unit 26 extracts three identifiers related to the attributes of the content from the SIT (step S2602). Specifically, the three identifiers are character_encoding_flag, original_video_scan_flag, and original_transfer_characteristics.

The SIT analysis unit 26 generates processing control information to be output to the decoding unit 23 and the output processing unit 24 based on the values of the extracted three identifiers. In the example of the present embodiment, “0” is set for character_encoding_flag, “0” is set for original_video_scan_flag, and “10” is set for original_transfer_characteristics.

The SIT analysis unit 26 determines whether the electronic device 2 can correspond to the attributes of the content indicated by these identifiers (step S2603).

For example, if the electronic device 2 can use the character encoding method corresponding to when character_encoding_flag is "0", the SIT analysis unit 26 outputs the processing control information for performing character decoding to the decoding unit 23 (step S2604). In addition, similarly, if the electronic device 2 corresponds to the encoding method corresponding to the value of original_transfer_characteristics, the SIT analysis unit 26 outputs to the decoding unit 23 processing control information indicating the execution of the processing. In addition, if the electronic device 2 corresponds to the scanning method corresponding to the original_video_scan_flag, the SIT analysis unit 26 outputs processing control information indicating the execution of the processing to the output processing unit 24. It should be noted that when the electronic device 2 corresponds to a plurality of encoding methods, it is also possible to output an index indicating the encoding method or the like as processing control information. In this case, for example, the decoding unit 23 performs decoding using a method corresponding to the encoding method indicated by the index. In addition, although this embodiment shows an example in which the SIT analysis unit 26 generates processing control information and outputs the processing control information to the decoding unit 23 and the output processing unit 24, for example, the SIT analysis unit 26 may recognize The value of the identifier is sent to the control unit 27, and the control unit 27 controls the decoding unit 23 and the output processing unit 24.

Returning to Fig. 7, in the decoding unit 23, based on the input processing control information, the input partial element stream data is decoded to obtain partial service data, and the partial service data is output to the output processing unit 24. (Step S24). The output processing unit 24 uses the partial service data input from the decoding unit 23 and the program-related information input from the SIT analysis unit 26 to adjust the output time, display method, etc., based on the processing control information received from the SIT analysis unit 26 The partial service data is output to the output unit 25 (step S25). Part of the service data is output from the output unit 25, such as a display device, a speaker, etc., as images, sounds, characters, etc. (step S26).

It should be noted that in the above step S23, when the electronic device 2 cannot correspond to the designated function, for example, when the character code does not correspond to UTF-8, the output unit 24 displays "Unable to display" Etc., or display the name of the function that cannot be supported, so as to notify the user.

In addition, when the electronic device 2 cannot interpret the setting, the attribute information of the content of the SIT in this embodiment cannot be used. However, this setting will not affect the existing functions of the electronic device 2 (the conventional partial TS processing based on the AOJ profile).

In this way, in this embodiment, as shown in FIGS. 6A and 6B, the television receiving device 1 includes the attribute information of the content in the partial TS, so that the electronic device 2 on the client side can use the content that can be processed. It is considered that even if the electronic device 2 is a reception and playback display device corresponding to the conventional 2K broadcast, depending on the model, there is a new method or format that is part of the function of the television receiving device 1 and is installed or installed in the television receiving device 1. The output image signal format serves as an electronic device that can perform high-quality image processing. Therefore, according to this embodiment, it is possible to realize a flexible partial TS that does not largely impair compatibility with the past.

In addition, in the present embodiment, in the television receiving device 1 (for example, an advanced broadband digital satellite broadcasting receiving device) that is the distribution source of content, even if it is impossible to implement conversion output based entirely on an existing profile such as an AOJ profile. In the case of the electronic device 2 can be distributed. In this case, if the processing based on this embodiment can be implemented in the electronic device 2 of the distribution destination (for example, a receiving and playing display device), it is different from the case of processing a partial TS based entirely on an existing profile. In comparison, high-quality program broadcasting and correct program information display can be realized.

By performing the above processing in parallel for each electronic device 2A, 2B, 2C, the electronic devices 2A, 2B, 2C and the partial TS of the television receiver 1 can be exchanged at the same time, for example, the electronic devices 2A, 2B, 2C It is also possible to obtain the same content at the same time. As long as the electronic devices 2A, 2B, and 2C designate different designated content, respectively, different content can be obtained.

It should be noted that the structure shown in this embodiment is not limited to being applicable to the distribution source (equivalent to the television receiving device 1) is an advanced broadband digital satellite broadcast receiving device, but can also be applied to the next generation terrestrial broadcast corresponding receiving device in the future .

In this way, according to the present embodiment, it is possible to provide a digital content transmission device and a transmission method in a content format of a partial TS that can utilize 4K/8K broadcast content by a 2K receiving device.

(Modification)

In this modification example, an example is shown in which a descriptor (descriptor) is defined for the SIT and the attribute information of the content is included in the descriptor.

FIG. 9A is a diagram showing an example of the structure of a descriptor that is transferred by a partial TS according to a modification example, and is defined by a control descriptor as a partial transport stream, for example. This descriptor can be inserted into the descriptor 6B of the first loop of the SIT shown in FIG. 6A, for example.

In this modification example, the following three identifiers are set in the identifier 9A shown in FIG. 9A.

·Character_encoding_flag (character encoding recognition)

Character encoding recognition (1-bit flag) indicates the recognition of the program arrangement information in the partial TS and the character encoding used in the subtitles. Set the 8-unit encoding to "1" and the UTF-8 to "0" .

· Original_video_scan_flag (image scan flag)

The image scan flag (1-bit flag) is set to "1" when the original image signal is an interlaced signal, and is set to "0" in the case of a progressive signal.

·Original_transfer_characteristics (image signal transmission characteristics)

The image signal transmission characteristics (2-bit field) identify the original image signal transmission characteristics, and perform coding based on the values shown in FIG. 9B.

The transfer_characteristics of the VUI in FIG. 9B indicates the transfer characteristics of the original image signal, and indicates the transfer characteristics of the image signal specified by each value.

The television receiver 1 of this modified example generates and transmits the partial TS according to the flowchart of FIG. 5. Especially in this modification, in step S14, three identifiers character_encoding_flag and original_transfer_characteristics are included to generate a partial transport stream use control descriptor, and the generated partial transport stream use control descriptor is included in the first part of 6B in FIG. 6A. SIT is generated in a loop. On the other hand, the electronic device 2 of this modified example uses the content from the television receiver 1 according to the flowcharts in FIGS. 7 and 8. In particular, in this modified example, in step S2602 in FIG. 8, three identifiers character_encoding_flag and original_transfer_characteristics are extracted from the partial transport stream utilization control descriptor included in the SIT.

In this way, in this embodiment, as shown in FIGS. 9A and 9B, the television receiver 1 includes the attribute information of the content in the partial TS, so that the content that can be processed by the electronic device 2 as the client side can be used.

According to at least one embodiment described above, it is possible to provide a digital content sending device, a sending method, a digital content receiving device, and a receiving method in the form of a partial TS content that can be used by a 2K receiving device using 4K/8K broadcast content.

Although several embodiments of the present application have been described, these embodiments are presented as examples and do not limit the scope of the appended claims of the present application. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the scope of the present application. These embodiments or their modifications are included in the scope and spirit of the application, and are included in the scope equivalent to the application described in the claims. In addition, in each component of the claims, when the component is divided and expressed, or when a plurality of components are combined, or when these components are combined, it is also the scope of the present application. In addition, even if a plurality of embodiments are combined, an example constructed by the combination is within the scope of the present application.

In addition, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part compared with the actual form. In addition, even when the claims are expressed as control logic, when expressed as a program containing instructions to be executed by a computer, and when expressed as a computer-readable nonvolatile storage medium in which the above-mentioned instructions are recorded, it is also When the device of this application is applied. In addition, there are no limitations on the names and terms used, and even other expressions, as long as they have substantially the same content and the same subject, are included in the scope of the claims attached to this application.

Claims (18)

A data content sending device, which includes: The receiving part, which receives the transmission signal based on the MMT/TLV method; A TLV stream acquisition unit, which acquires a TLV stream from the transmission signal; A component data acquisition part, which acquires component data related to specific content from the TLV stream; A transcoding part, which converts the component data into elementary stream data based on the MPEG-2 TS method; A partial transport stream generating unit that generates a partial transport stream based on the MPEG-2 TS method, the partial transport stream including the elementary stream data and the associated data related to the attribute information of the specific content; and The sending unit sends the partial transport stream. The data content transmitting device according to claim 1, wherein: The associated data is attribute information including designated parameters other than those specified in the ARIB.OR.JP_PN configuration file described in ARIB STD-B21. The digital content transmitting device according to claim 1 or 2, wherein: The associated data includes information related to the transcoding unit. The digital content transmitting device according to claim 1 or 2, wherein: The associated data includes at least one of character code recognition, image scanning mark, and image signal transmission characteristics. The digital content transmitting apparatus according to claim 4, wherein: The related data is described as an identifier of the program related information table. The digital content transmitting apparatus according to claim 5, wherein: The program related information table is the selection information table SIT specified in ARIB STD-B21. The digital content transmitting device according to claim 6, wherein: The related data is described as an identifier in a descriptor included in the program related information table. A method for sending digital content, wherein Receive transmission signals based on MMT/TLV mode; Obtain the TLV stream from the transmission signal; Obtain component data related to specific content from the TLV stream; Converting the component data into elementary stream data based on MPEG-2 TS; Generate a partial transport stream based on the MPEG-2 TS mode, where the partial transport stream includes the elementary stream data and the associated data related to the attribute information of the specific content; and Send the partial transport stream. A digital content receiving device, which includes: The receiving unit receives a partial transport stream based on the MPEG-2 TS method, the partial transport stream includes elementary stream data and associated data, where the elementary stream data is a component of specific content that will be sent based on the MMT/TLV method Data obtained by transcoding data, where the associated data is data related to the attribute information of the specific content; A partial transport stream processing unit that extracts the associated data related to the element stream data and the attribute information of the content from the partial transport stream; and The processing judgment unit determines the processing content for the element stream data based on the associated data. The digital content receiving device according to claim 9, wherein: The digital content receiving device further includes a decoding unit that performs decoding processing on the elementary stream data to output service data, The processing determination unit determines whether the element stream data can be decoded by the decoding unit based on the associated data. The digital content receiving device according to claim 10, wherein: The processing determination unit determines whether the service data can be output by the decoding unit based on the associated data. The digital content receiving device according to any one of claims 9 to 11, wherein: The associated data is attribute information including designated parameters other than those specified in the ARIB.OR.JP_PN configuration file described in ARIB-STD-B21. The digital content receiving device according to claim 12, wherein: The associated data includes the transcoded information. The digital content receiving device according to claim 12, wherein: The associated data includes at least one of character code recognition, image scanning mark, and image signal transmission characteristics. The digital content receiving device according to claim 12, wherein: The related data is described as an identifier of the program related information table. The digital content receiving device according to claim 15, wherein: The program-related information table is the SIT specified in ARIB STD-B21. The digital content receiving device according to claim 16, wherein: The related data is described as an identifier in a descriptor included in the program related information table. A method for receiving digital content, wherein Receive a partial transport stream based on the MPEG-2 TS method, the partial transport stream includes elementary stream data and associated data, where the elementary stream data is to transcode specific content component data sent based on the MMT/TLV method And the obtained data, the associated data is data related to the attribute information of the specific content; Extract the associated data involved in the element stream data and the attribute information of the content from the partial transport stream; and According to the associated data, the processing content of the element stream data is determined.

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