JP7447329B2 - Transmission/reception system - Google Patents

Description

Embodiments relate to a digital content transmitting device, a transmitting method, and a transmitting/receiving system.

In conventional satellite digital broadcasting and terrestrial digital broadcasting, the specification of partial transport stream (hereinafter referred to as "partial TS") based on the MPEG-2 TS system is used as a content format that is input and output through high-speed digital interfaces such as IP interfaces of compatible TV receiving devices. It is specified in ARIB-STD-B21.

The partial TS is a TS obtained by selectively extracting a specific program or a component within the program from a transport stream (hereinafter referred to as TS) received by a television receiving device. This partial TS is used as a format (content format) when transmitting content received by the television receiving device to other television receiving devices and peripheral electronic devices such as tablet terminals.

In this way, content can be used on nearby tablet terminals by sending and receiving partial TSs, so for the purpose of copyright protection, etc., it is necessary to clarify where the program that was the basis of partial TS generation was being broadcast. It is essential to write identifiers such as network_id, transport_stream_id, and service_id in the partial TS.

Similarly, with respect to advanced broadband satellite digital broadcasting that started in December 2018, there is a need to transmit content from compatible television receivers to peripheral electronic devices.

ARIB STD-B21 5.10 version “Digital broadcasting receiving device standard” ARIB STD-B63 1.7 edition “Advanced wideband satellite digital broadcasting receiver standard”

However, in advanced broadband satellite digital broadcasting, a new multiplexing method based on the MMT/TLV method is adopted, and the partial stream specification, which follows the conventional partial TS specifications as the input/output content format of the high-speed digital interface, It is not possible to reveal the location (information source) of broadcast programs using peripheral electronic devices such as tablet terminals.

Therefore, the problem to be solved by the present invention is to provide a digital content transmitting device, a transmitting method, and a transmitting/receiving system that employs a partial stream content format that clarifies the location of a broadcast program transmitted based on the MMT/TLV method. That's true.

A transmission/reception system according to one embodiment includes a source device that receives content (broadcast program) and outputs it as a partial TLV stream, and a sink device that receives the partial TLV stream, and the source device includes: means for receiving component data and control information data that constitute the content (broadcast program); means for extracting and editing the component data and control information data that constitute the content (broadcast program) to generate a partial TLV stream; MH-SIT (SelectionInformationTable) that includes service_id for identifying the service from other services as control information regarding the partial TLV stream, network-id for identifying the network of the original distribution system, and number tlv_stream_id for identifying the partial TLV stream. and means for transmitting a partial TLV stream in which the content (broadcast program) and control information including the MH-SIT are multiplexed; It has means for receiving a partial TLV stream in which control information including the MH-SIT is multiplexed.

FIG. 1 is a diagram showing an example of a television receiving device and electronic equipment compatible with digital broadcasting based on the MMT/TLV system according to the present embodiment. FIG. 2 is a block diagram showing an example of the functional configuration of a television receiving device compatible with digital broadcasting based on the MMT/TLV system according to the same embodiment. FIG. 3 is a block diagram showing an example of the functional configuration of an electronic device compatible with digital broadcasting based on the MMT/TLV system according to the same embodiment. FIG. 4 is a flowchart illustrating an example of processing operations as a source-side electronic device of a television receiving device compatible with digital broadcasting based on the MMT/TLV system according to the embodiment. FIG. 5 is a diagram illustrating an example of the configuration of an MH-SIT that transmits using a partial TLV stream according to the same embodiment. FIG. 6 is a diagram illustrating an example of the configuration of a descriptor transmitted in a partial TLV stream according to the same embodiment. FIG. 7 is a flowchart illustrating an example of the processing operation of the electronic device on the sink side according to the embodiment. FIG. 8 is a diagram illustrating an example of an advanced broadband satellite digital broadcasting network according to Modification 1. FIG. 9 is a block diagram illustrating an example of the functional configuration of a television receiving device in an advanced broadband satellite digital broadcasting network according to Modification 2. FIG. 10 is a flowchart illustrating an operation example when the television receiving device according to the modification 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 a partial TLV stream in the modification. FIG. 12 is a flowchart illustrating an operation example when the television receiving device receives a partial TLV stream in the modification.

Embodiments will be described below with reference to the drawings.

(Embodiment)
FIG. 1 is a diagram showing an example of a television receiving device and electronic equipment compatible with digital broadcasting based on the MMT/TLV system according to the present embodiment.

The television receiving device 1 receives a broadcast signal of digital broadcasting based on the MMT/TLV system, and obtains content transmitted using the broadcast signal. Electronic devices 2A, 2B, and 2C (referred to as electronic device 2 if no particular distinction is required) are interfaces 3A, 3B, and 3C (referred to as interface 3 if no particular distinction is required) that can communicate with the television receiver 1, respectively. ), obtains the content transmitted as a broadcast signal via the interface 3, and outputs it for display. Further, in this embodiment, the number of electronic devices 2 is three, but depending on the interface that the television receiving device 1 has, the number can be one or more.

The electronic device 2 has the ability (resolution, frame rate, etc.) to use content (broadcast programs) transmitted based on the MMT/TLV method. The electronic device 2 may be, for example, a tablet terminal, a monitor, a television receiver, or the like.

The interface 3 between the television receiver 1 and the electronic device 2 may be wired or wireless. Alternatively, the television receiving device 1 and the electronic device 2 may form a network compliant with DLNA (registered trademark) (Digital Living Network Alliance) or an extension thereof, and may be able to communicate. Further, the electronic device 2 may be a smartphone as long as it has an interface that can communicate with the television receiving device 1.

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 system according to the same embodiment.

The television receiving device 1 receives a broadcast signal of digital broadcasting based on the MMT/TLV system with an antenna 11, demodulates the broadcast signal with a tuner unit 12, and obtains digital data (TLV stream) in TLV (Type Length Value) format. do. The scrambled data of the acquired TLV stream is descrambled by the descrambling unit 13, and the TLV stream is converted into an IP/UDP stream and further into an MMT (Mpeg Media Transport) stream by the demultiplexer unit 14, and component data (e.g. , encoded video data, audio data, character data, etc.) and SI (Signaling Information) data, which is control information data. The component data is decoded and reproduced by the decoder 15 into service data such as video signals, audio signals, and character data. The service data is input to the output processing section 16, the output timing, display method, etc. are adjusted, and the service data is output from the output section 17, such as a display device or a speaker. The SI data is control information regarding the broadcast system, such as information regarding broadcast programs and control information regarding multiplexing of IP packets. Although not particularly shown, the demultiplexer unit 14 also separates the NTP format time information data stored in the TLV stream in the IP/UDP format, reproduces the clock synchronization signal, and transmits it to the decoder 15 and output processing unit. It is used for timing control at 16.

Partial TLV stream generation units 18A, 18B, and 18C (referred to as partial TLV stream generation units 18 when there is no particular need for distinction) generate content selected from the TVL stream and MMT stream separated and acquired by the demultiplexer unit 14. A partial TLV stream is generated by extracting and editing component data and control information data that make up a (broadcast program). A TVL stream is a stream obtained by adding IP information and the like to an MMT stream. Therefore, since the MMT stream is included in the TVL stream, hereinafter both will be referred to as an MMT/TLV stream.

The partial TLV stream is based on partial TS based on the MPEG-2 TS system. Partial TS based on the MPEG-2 TS system extracts a specific program or components within the program from a transport stream (hereinafter referred to as TS, but when specifically distinguished from partial, it is referred to as full TS) obtained from a broadcast signal. This is a TS obtained through selective extraction, and its specifications are defined in ARIB-STD-B21.

In this embodiment, a partial TLV stream, which is a content format for advanced broadband satellite digital broadcasting, is defined with reference to partial TS based on the MPEG-2 TS system. The partial TLV stream will be described later. The partial TLV stream is sent from the interface 19.

The television receiving device 1 can include one or more interfaces, and FIG. 2 shows an example including interfaces 19A, 19B, and 19C (referred to as interface 19 unless otherwise specified). 19A, 19B, and 19C each generate and decompose frame data according to a predetermined communication protocol, and perform transmission and reception using a medium such as wired or wireless. The interface 19 may have encryption and encryption/decryption functions such as scrambling.

The control unit 110 includes, for example, a CPU, and controls each function of the television receiving device 1. For example, the control unit 110 establishes connections for external communication via various interfaces including the interface 19, controls the operation of the partial TLV stream generation unit 18, and the like. Further, the control unit 110 controls each function of the television receiving device 1 using 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 that supports video and audio playback based on the MMT/TLV method according to the same embodiment.

The electronic device 2 receives the partial TLV stream transmitted by the television receiving device 1 through the interface 21 . The interface 21 performs transmission and reception with the interface 19 via a medium such as wired or wireless, and generates and decomposes frame data according to communication regulations. It also has encryption and encryption/decryption functions corresponding to the interface 19.

The partial TLV stream processing unit 22 processes the received partial TLV stream and obtains component data and SI data. The component data is input to the decoder 23 together with the SI data, converted to service data, and output to the output processing section 24. The output processing unit 24 adjusts the output timing, display method, etc. of the service data, and outputs the service data as images, audio, characters, etc. from an output unit 25 such as a signal display device or a speaker.

Further, the SI data output from the partial TLV stream processing section 22 is input to the information source detection section 26. The information source detection unit 26 extracts related data (also referred to as reference information) included in the SI data, and detects the location of the content such as the broadcaster of the program from the related data. The location of the detected content is input to the output processing unit 24, and, for example, text information regarding the location of the content is displayed superimposed on the program being broadcast as appropriate. Note that instead of text information, for example, a logo of a broadcaster may be displayed. Alternatively, the correspondence between the related data included in the SI data and the corresponding logo may be set in advance in the memory of the electronic device 2, and used for display. Alternatively, the correspondence relationship may be included in the broadcast signal, the correspondence relationship may be acquired from the broadcast signal received by the television receiving device 1, and transferred to the electronic device 2, or the electronic device 2 may be able to receive the broadcast signal. If so, you can obtain it directly or via the Internet.

In addition, the information source detection unit 26 can store the related data extracted from the SI data in the memory as log data, and if connected to the Internet, it can also output it to the outside via the Internet. be.

The control unit 27 includes, for example, a CPU, and controls each function of the electronic device 2. For example, the control unit 27 establishes connections for external communication via various interfaces including the interface 21, and controls the operation of the information source detection unit 26. The control unit 27 also controls each function of the electronic device 2 using control signals from a user interface 28 such as a remote control included in the electronic device 2 .

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

The television receiving device 1 and the electronic device 2 can also be considered to have a relationship between a source and a sink (or a server and a client). For example, the television receiving device 1, which is a source (or server), outputs a partial TVL stream, and the electronic device 2, which is a sink (or client), receives the partial TVL stream output by the source. In this embodiment, the user specifies content (program) from the electronic device 2 that is the sink, and the electronic device 2 acquires related data included in SI data transmitted from the television receiving device 1 that is the source. , shows an example of clarifying the location of content.

In the following, processing for one electronic device 2 (for example, electronic device 2A) and television receiving device 1 will be described, but similar processing can be performed for other electronic devices 2 (for example, electronic devices 2B and 2C). be.

When the user specifies content (program) using the electronic device 2, the interface 19 of the television receiving device 1 and the interface 21 of the electronic device 2 establish a communication connection due to a trigger from the electronic device 2. In this embodiment, an example will be shown in which, when content is specified, the television receiving device 1 automatically transmits related data that reveals the location of the program.

FIG. 4 is a flowchart illustrating an example of processing operations as a source-side electronic device of a television receiving device compatible with digital broadcasting based on the MMT/TLV system according to the embodiment.
The control unit 110 of the television receiving device 1 recognizes the specified content (such as a specific program or a component within the program) 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. When the partial TLV stream generation unit 18 receives the MMT/TLV stream from the demultiplexer unit 14, it extracts component data and related SI data related to the specified content received from the control unit 110 from the MMT/TLV stream (YES in step S12). , step S13). Related data is extracted from the extracted SI data (step S14). Specifically, three related data, network_id which is a network identifier, tlv_stream_id which is a tlv stream identifier, and service_id which is a service identifier, are extracted from the SI data. These three related data will be explained in detail in the explanation of FIGS. 5 and 6. From these three related data, it is generally possible to uniquely identify the location of a broadcast program in digital broadcasting based on the MMT/TLV system (for example, advanced wideband satellite digital broadcasting). Therefore, in order to clarify the location of the broadcast program related to the designated content from the electronic device 2, the television receiving device 1 needs to transmit three related data network_id, tlv_stream_id, and service_id to the electronic device 2. Therefore, a partial TLV stream including three related data is generated (step S15).

Here, details of the partial TLV stream will be explained. A partial TLV stream is a content format for advanced wideband satellite digital broadcasting defined with reference to partial TS based on the MPEG-2 system.

A partial TS is usually obtained by selectively extracting a specific program or a component within the program from a broadcast signal in which at least one HD (High Definition) or SD (Standard Definition) program is multiplexed using the TS method. Also in the TS system, the location of a broadcast program can generally be uniquely identified using network_id, transport_stream_id, and service_id. Therefore, the partial TS also usually includes network_id, transport_stream_id, and service_id as related data extracted from the broadcast signal. In order to transmit these related data, the partial TS necessarily includes control information tables such as transmission control information PAT and PMT, and program related information SIT. transport_stream_id is written in PAT, service_id is written in PMT, and network_id is written in SIT.

Incidentally, in the MMT/TLV stream, although there is a PLT corresponding to a PAT and an MPT corresponding to a PMT by definition, there is no control information table corresponding to an SIT. Furthermore, although it is assumed that PLT and MPT are required for partial TLV streams, only the service_id field exists in PLT and MPT.

Therefore, in this embodiment, a MH-SIT corresponding to an SIT to be included in a partial TLV stream is newly defined, service_id is written, and network_id and tlv_stream_id are added to the MH-network identification descriptor placed in the MH-SIT. Set. Therefore, only the MH-SIT can set network_id, tlv_stream_id, and service_id, which are reference information that can uniquely determine the source of service data (program). Note that the control information table in which reference information is stored may not be stored only in one control information table, but may be stored in multiple control information tables so that multiple pieces of reference information can be processed independently. Furthermore, as long as reference information can be transmitted, it is not limited to transmitting the control information table.

Since the SIT defined in the partial TS has a low transmission frequency and a small communication load, by defining the MH-SIT with reference to the partial TS and setting three related data there, it is possible to avoid a large communication load. It becomes possible to transmit a partial TLV stream without providing a partial TLV stream.

FIG. 5 is a diagram showing an example of the configuration of the MH-SIT, which is a control information table transmitted in a partial TLV stream according to the same embodiment. In FIG. 5, service_id is set as the identifier 51.

service_id is a 16-bit field that serves as a label to identify this 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 meanings of other identifiers shown in FIG. 5 are shown below.
・section_syntax_indicator (section syntax instruction)
The section syntax instruction is a 1-bit field and is always set to "1".
・section_length (section length)
This is a 12-bit field. section_length defines the number of bytes in the section from immediately after this field to the end of the section including the CRC. The section length must not exceed 4093 bytes so that the total section length does not exceed a maximum of 4096 bytes.
・version_number (version number)
This 5-bit field is the version number of the table. The version number is incremented by 1 when there is a change in the information in the table. If the value becomes 31, it returns to 0. If the current next instruction is "1", the version number is the version number of the current table. If the current next instruction is "0", the version number becomes the version number of the next table.
・current_next_indicator (current next instruction)
If this one-bit indication is ``1'', it indicates that the table is the current table; if it is ``0'', it indicates that the table being sent has not yet been applied and will be used as the next table.
・section_number (section number)
This 8-bit field indicates the section number. The section number is 0x00.
・last_section_number (last section number)
This 8-bit field indicates the final section number. The final section number is 0x00.
・transmission_info_loop_length (transmission information loop length)
This 12-bit field represents the total number of bytes of the descriptor that describes the transmission parameters of the partial TLV stream.
・running_status (progress status)
This 3-bit field represents the progress state of the original stream event. This is the current event progress state of the original stream. If there are no current events in the original stream, the state is considered non-executing. The meaning of the driving state value is defined in ARIB STD-B60.
・service_loop_length (service loop length)
This 12-bit field defines the total byte length of the descriptor loop containing SI-related information of services and events included in the partial TLV stream that follows.
・CRC_32 (CRC)
ITU-T Recommendation H. 222.0.

FIG. 6 is a diagram illustrating an example of the configuration of a descriptor transmitted in a partial TLV stream according to the same embodiment.

It is defined as an MH-network identification descriptor, and network_id is set in the identifier 61 and tlv_stream_id is set in the identifier 62 in this descriptor. Further, this descriptor is placed in the descriptor area 52 in FIG.

network_id is a 16-bit field that describes the network identification value of the distribution system that generated the partial TLV stream. In the original distribution system, this value is described in TLV-NIT, and the assignment of the field value is specified by the standards organization.

tlv_stream_id indicates the identification number of the TLV stream.
The meanings of other descriptors shown in FIG. 6 are shown below.
・country_code (country code)
This 24-bit field represents the country name using a 3-letter alphabetic code defined by ISO3166. When used in this descriptor, it represents the country of the distribution system in which the partial TLV stream was generated. Each character is encoded with 8 bits according to ISO 8859-1 and inserted in that order into a 24-bit field. The three-letter code for Japan is "JPN" and is encoded as follows.
"0100 1010 0101 0000 0100 1110"
・media_type (media classification)
In this 16-bit field, two alphabetic characters are inserted, and these two characters represent the type of media. When used in this descriptor, it represents the media type of the distribution system in which the partial TLV stream was generated. Each character is encoded with 8 bits according to ISO 8859-1 and inserted into a 16-bit field in that order. The types of media are as follows.
(value, meaning): (0x4142, advanced BS/advanced wideband CS)
- network_id (network identification): This is a 16-bit field in which the value of the network identification of the distribution system in which the partial TLV stream was generated is described. In the original distribution system, this value is described in TLV-NIT, and the assignment of the field value is specified by the standards organization.
・private_data (private data)
This is an 8xN bit field with individually defined values.

Returning to step S15 in FIG. 4, after setting the three related data in the MH-SIT, the partial TLV stream generation unit 18 generates SI data (hereinafter referred to as partial SI data) for the partial TLV stream including at least the MH-SIT. ). Since service_id is included in PLT and MPT, network_id and tlv_stream_id are included in MH-SIT, and partial SI data is generated including at least PLT, MPT, and MH-SIT.
The partial TLV stream generation unit 18 generates component data for a partial TLV stream (hereinafter referred to as partial component data) from component data related to specified content, and generates a partial TLV stream from the partial SI data and the partial component data. (Step S15).

Note that in this embodiment, an example was shown in which service_id, network_id, and tlv_stream_id are written in the defined MH-SIT, but an identifier that is related data may be written in MPT that is another control information table.

Furthermore, in this embodiment, an example was shown in which network_id and tlv_stream_id are written in the MH-network identification descriptor, but instead of providing a field in which tlv_stream_id is written in the MH-network identification descriptor, reserved_future_use (16 ).

The partial TLV stream is transmitted from the interface 19 (step 16). The partial TLV stream generation unit 18 ends the process when no MMT/TLV stream is received from the demultiplexer unit 14 (NO in step S12).

FIG. 7 is a flowchart showing an example of the processing operation of the electronic device on the sink side according to the same embodiment, and assumes that the electronic device 2 is the electronic device on the sink side.

When the partial TLV stream processing unit 22 of the electronic device 2 receives the partial TLV stream from the interface 21, it performs processing such as a demultiplexer on the partial TLV stream and outputs partial component data and partial SI data (step S21 YES, step S22). For example, in step 22, the partial TLV stream processing unit 22 performs a descrambling process (the partial TLV stream is subjected to a scrambling process and requires encryption/decoding, as in the case where the television receiving device 1 receives an MMT/TLV stream). ) and demultiplexer processing. In the demultiplexer process, partial component data and partial SI data are acquired from the partial TLV stream. Partial component data and partial SI data output by the partial TLV stream processing unit 22 are input to the decoder 23, where decoding processing is performed and converted into service data such as video signals, audio signals, character data, etc. (Step 23). The service data is input to the output processing section 24, the output timing, display method, etc. are adjusted (step S24), and the service data is outputted from the output section 25 such as a display device or a speaker (step S25).

On the other hand, the partial SI data output by the partial TLV stream processing section 22 in step 22 is input to the information source extraction section 26, and the information source extraction section 26 extracts related data from the partial SI data. Specifically, three related data, network_id, tlv_stream_id, and service_id, are extracted from the partial SI data. The information source extraction unit 26 identifies, for example, the location of a broadcast program in advanced broadband satellite digital broadcasting from the extracted three related data, and outputs it to the output processing unit 24 (step S26). The output processing unit 24 adjusts the output timing, display method, etc. of the location information of the broadcast program input from the information source extraction unit 26 together with the service data input from the decoder 23, and then outputs it to the output unit 25 (step S24 ), the output unit 25 outputs the location information of the broadcast program (step S25).

By performing the above processing in parallel for each of the electronic devices 2A, 2B, and 2C, it is possible to simultaneously communicate with the electronic devices 2A, 2B, and 2C and the television receiving device 1. For example, the electronic devices 2A, 2B, and 2C can obtain the same content at the same time, or by specifying different designated contents from the electronic devices 2A, 2B, and 2C, they can each obtain different contents.

In this embodiment, by including the MH-SIT and MH-network identification descriptor defined as shown in FIGS. 5 and 6 in the partial TLV stream, the source of the content received by the electronic device 2 on the sink side can be determined. It becomes possible to judge.

In addition, in the partial TS stream using the TS method, three related data are included in three tables: PAT, PMT, and SIT, but in the example of this embodiment, by including three related data in MH-SIT, Processing load is reduced and processing speed is improved. Also, like SIT in a partial TS stream, due to the characteristics of MH-SIT, the transmission frequency is lower than that of other control information tables such as PLT and MPT, so the processing load is reduced compared to when PLT and MPT are included. It's also effective.

As described above, according to the present embodiment, it is possible to provide a digital content transmitting apparatus and a transmitting method that employ a partial stream content format that clarifies the location of a broadcast program transmitted based on the MMT/TLV method.

(Modification 1)
FIGS. 8 to 12 are diagrams showing modified examples of the above-described embodiment, and corresponding parts and similar parts of each block shown in the above-described embodiment are given the same or similar reference numerals.

FIG. 8 is a diagram showing an example of a network for advanced wideband satellite digital broadcasting according to modification 1, in which the DIRD 10A includes the descrambling section 13, demultiplexer section 14, decoder section 15, output processing section 16, partial An example is shown in which the functions of the TLV stream generation section 18, interface 19, and control section 110 are performed. This modification shows an example in which the television receiving device 1A is used as the source electronic device, and the smartphone 2BA and the tablet 2CA are used as the sink electronic devices 2 in the home network.

An encryption/decryption function may be interposed between the television receiving device 1A and each electronic device 2BA, 2CA. Further, the television receiving device 1A may include a stream distribution management unit that manages distribution information (number of distributions, distribution destinations, etc.) when a partial TLV stream is distributed. Furthermore, the management information of the stream distribution management section may be transmitted to the billing management section.

(Modification 2)
FIG. 9 is a block diagram showing an example of the functional configuration of a television receiving device compatible with advanced wideband satellite digital broadcasting according to modification 2, and portions corresponding to the functions of the television receiving device shown in FIG. 2 are the same or similar. It is marked with a symbol.

In the television receiving device 1A shown in FIG. 9, an example is shown in which functions corresponding to the partial TLV stream generation section 18 shown in FIG. 2 are divided into a control section 110A and a multiplexing section 18. Further, the demultiplexer section 14 and the decoder 15 in FIG. 2 correspond to an MMT demultiplexer section 14A, a video decoding section, an audio decoding section, and an EPG/multimedia decoder 15A, respectively. The video decoded signal obtained from the video decoding section is supplied to the display of the output section, and the audio signal output from the audio decoding section is supplied to the audio system (speaker system) of the output section.

FIG. 10 shows an operation example in which the television receiving device 1A of FIG. 9 operates based on the control of the control unit 110A. When a signal requesting a partial stream is detected from the second television receiving device 2AA (TV2) (SA11), processing of the partial TLV stream is started (SA12). The partial TLV stream is extracted from the MMT demultiplexer 14A, prepared, and input to the multiplexer 18A (SA00, SA16).

The control unit 110A generates reference information as described in FIGS. 5 and 6 (SA13, SA14), and the reference information is output to the multiplexing unit 18A, where it is multiplexed as a partial TLV stream. (SA15). As a result, a partial TLV stream in which MH-SITs including reference information are multiplexed is transmitted to the television receiving device 2B (SA17).

Note that the network_id, tlv_stream_id, and service_id for determining the source may be inserted and multiplexed into the partial TLV stream in any position or pattern. Furthermore, the timing of transmission can also be modified, and may be the start of transmission of the partial TLV stream.

FIG. 11 shows a configuration example of a television receiving device 2AA that receives the partial TLV stream transmitted by the television receiving device 1A in the same modification.

The functional configuration of this television receiving device 2AA is the same functional configuration as that of the television receiving device 1A shown in FIG. 9, and similar reference numerals are given to functional blocks that correspond to each other. In contrast to the symbols 12A, 13A, 14A, . . . of the television receiver 1A shown in FIG. 12, the symbols of the television receiver 2AA are written as 2A12, 2A13, 2A14, .
The partial TLV stream sent from the television receiving device 1A is input to the multiplexer/demultiplexer 2A18 via the interface 21A, and the reference information is analyzed in the controller 2A110, thereby identifying the source of the content of the partial TLV stream. It becomes clear. The MMT/TLV stream is input to the MMT multiplexer/demultiplexer 2A14, and video encoded data and audio encoded data of the packets are extracted and decoded in the video decoder and audio decoder, respectively.

FIG. 12 is a flowchart illustrating an example of the operation of the television receiver 2AA of FIG. 11. When receiving a partial TLV stream reception command or reception request, partial TLV stream reception processing is started (SB11, SB12). The reference information multiplexed on the partial TLV stream is analyzed by the control unit 2A110, and the source of the content multiplexed on the stream is determined (SB13, SB14, SB15). On the other hand, the content multiplexed in the stream is processed by the output processing unit 2A15 and output as display and audio output data (SB20). Unless reception of the partial TLV stream is stopped, the content multiplexed in the stream continues to be displayed. However, when the receiving device is switched off or reception is stopped, the above operation is stopped (SB21).

As described above, according to this modification, the location of a broadcast program transmitted based on the MMT/TLV method is made clear to different information terminals on the sink side using different functional configurations on the source side that provides content. It is possible to provide a digital content transmission device and a transmission method that adopt a partial stream content format.

Further, in the above embodiments and modifications, an example was shown in which an MMT/TLV stream obtained from a broadcast signal received from a tuner is used, but for example, an MMT/TLV stream based on an MMT/TLV method obtained via the Internet is used. TLV streams may also be used. Alternatively, the MMT/TLV stream may be temporarily stored in a storage device (not shown), and the data may be input to, for example, the demultiplexer section 14 in FIG. 2 to generate a partial TLV stream.
The main points of this system described above can also be described as follows.
(A1) The transmitting device includes a receiving unit that receives a broadcast signal that adopts the MMT/TLV method as a content format, a tuner that selects a desired TLV stream from the broadcast signal, and the SI (Signaling) that is a control signal. an extraction unit that extracts at least a network identifier (network_id), a tlv stream identifier (tlv_stream_id), and a service identifier (service_id) from the information; A transmitting device comprising: a partial TLV stream generation unit that generates a partial TLV stream including reference information including (service_id) and the TLV stream selected by the tuner.
(A2) As a transmission method, a transmitting device has a receiving unit that receives a broadcast signal that adopts the MMT/TLV method as a content format, a tuner that selects a desired TLV stream from the broadcast signal, and a control unit. In the method,
Based on the control of the control unit, at least a network identifier (network_id), a tlv stream identifier (tlv_stream_id), and a service identifier (service_id) are extracted from the SI (Signaling Information), which is a control signal, and the network identifier (network_id) is extracted. , the tlv stream identifier (tlv_stream_id) and the service identifier (service_id), and a partial TLV stream that includes the TLV stream selected by the tuner.
(B1) As a receiving device, the TLV stream included in the partial TLV stream corresponds to a TLV stream selected from a broadcast signal that adopts the MMT/TLV method as a content format,
The network identifier (network_id), the tlv stream identifier (tlv_stream_id), and the service identifier (service_id) are identifiers extracted from SI (Signaling Information), which is a control signal included in the broadcast signal, and
One table includes reference information defined for the partial TLV stream,
At least network_id, tlv_stream_id, and service_id for determining the source are inserted in the reference information,
The partial TLV stream is transmitted as a stream including the reference information and the TLV stream,
a receiving unit that receives the partial TLV stream;
A receiving device comprising: a determining unit that analyzes network_id, tlv_stream_id, and service_id included in the reference information to determine the source of content of the partial TLV stream.
(B2) As a reception method, the TLV stream included in the partial TLV stream corresponds to a TLV stream selected from a broadcast signal that adopts the MMT/TLV method as a content format;
The network identifier (network_id), the tlv stream identifier (tlv_stream_id), and the service identifier (service_id) are identifiers extracted from SI (Signaling Information), which is a control signal included in the broadcast signal, and
At least network_id, tlv_stream_id, and service_id for determining the source are inserted in the reference information defined for the partial TLV stream, and
The partial TLV stream is transmitted as a stream including the reference information and the TLV stream,
A receiving device including a receiving section and a control section,
The source of the content of the partial TLV stream is determined by receiving the partial TLV stream and analyzing the network identifier (network_id), tlv stream identifier (tlv_stream_id), and service identifier (service_id) included in the reference information. (C) Receiving method for the receiving device to determine (C) An encryption/decryption function for security may be provided between the sending side and the receiving side.
(D) When the source of the partial TLV stream is known, it may further include means for outputting logo data of the source to the display unit, and/or when the source of the partial TLV stream is known, further the source may be The device may include means for outputting the specific audio data to the audio output section.
(E) When the television receiving device distributes the partial TLV stream, it may include a stream distribution management unit that manages distribution information (number of distributions, distribution destinations, etc.). Furthermore, the management information of the stream distribution management section may be transmitted to the billing management section.
(E1) This system defines an MH-SIT that corresponds to a selection information table (SIT) multiplexed with a broadcast signal that uses the MMT/TLV method, and a system that includes means for transmitting and receiving this MH-SIT. It is.

Here, MH-SIT is reference information that includes all of the network identifier (network_id), tlv stream identifier (tlv_stream_id), and service identifier (service_id), and the three identifiers are used to identify the content included in the partial TLV stream. This is information whose source can be determined.

According to at least one embodiment described above, it is possible to provide a digital content transmitting device and a transmitting method that employ a partial stream content format that reveals the location of a broadcast program transmitted based on the MMT/TLV method. can.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents. Furthermore, each component of the claims is within the scope of the present invention even when the component is expressed separately, or when a plurality of components are expressed together, or when these are expressed in combination. Further, a plurality of embodiments may be combined, and embodiments constituted by this combination are also within the scope of the invention.

Further, in order to make the explanation clearer, the drawings may schematically represent the width, thickness, shape, etc. of each part compared to the actual aspect. Furthermore, the device of the present invention is applied even when the claims are expressed as control logic, as a program containing instructions for a computer to execute, or as a computer-readable recording medium containing the instructions. be. Furthermore, the names and terms used are not limited, and other expressions are included in the present invention as long as they have substantially the same content and purpose.

DESCRIPTION OF SYMBOLS 1... Television receiving device, 2... Electronic equipment, 14... Demultiplexer, 18... Partial TLV stream generation part, 19... Interface, 21... Interface, 22... Partial TLV Stream processing section, 23... Decoder, 24... Output processing section, 25... Output section, 26... Information source detection section, 27... Control section, 28... User interface, 110.・Control unit

Claims (1)

A transmission/reception system comprising a source device that receives content (broadcast program) and outputs it as a partial TLV stream, and a sink device that receives the partial TLV stream,
The source device is
means for receiving component data and control information data that constitute content (broadcast program);
A means for extracting and editing component data and control information data constituting content (broadcast program) to generate a partial TLV stream;
As control information regarding the partial TLV stream, an MH-SIT (Selection means for generating an Information Table);
means for transmitting a partial TLV stream in which the content (broadcast program) and control information including the MH-SIT are multiplexed;
The sink device is
A transmitting/receiving system comprising means for receiving a partial TLV stream in which the content (broadcast program) and control information including the MH-SIT are multiplexed.

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