CN112449749B - Digital content transmitting apparatus, digital content transmitting method, digital content receiving apparatus, digital content receiving method - Google Patents

Abstract

The present application provides a digital content transmitting apparatus, a digital content transmitting method, a digital content receiving apparatus, and a digital content receiving method, which adopt a content format of a partial stream so that an area of a broadcast program transmitted based on an MMT/TLV method is clearly visible. A digital content transmission device according to one embodiment includes a reception unit that receives a transmission signal transmitted by an MMT/TLV system, an acquisition/separation unit that acquires the MMT/TLV stream from the transmission signal and separates component data and 1 st control information data related to a specific content from the MMT/TLV stream, a partial stream generation unit that extracts related data for identifying the source of the specific content from the 1 st control information data, generates a partial stream from the 2 nd control information data and the component data generated including the related data, and a transmission unit that transmits the partial stream.

Description

Digital content transmitting apparatus, digital content transmitting method, digital content receiving apparatus, digital content receiving method

This application claims priority to the submission of japanese patent office having application number 2019-121938 and japanese patent application having application number 2019-121939 on 28/6/2019 and having application number 2019-121939 and japanese patent application having application number 2019-121939 and having application number digital content receiving apparatus, receiving method on 28/6/2019, the entire contents of which are incorporated herein by reference.

Technical Field

Embodiments relate to a digital content transmitting apparatus, a digital content transmitting method, a digital content receiving apparatus, and a digital content receiving method.

Background

In conventional digital satellite broadcasting and terrestrial digital broadcasting, a specification of a partial transport stream (hereinafter referred to as a partial TS) based on the MPEG-2TS scheme is defined in ARIB-STD-B21 as a content format that is input/output through a high-speed digital interface such as an IP interface corresponding to a television receiver.

The partial TS is a TS obtained by selecting and extracting a specific program or a Component (Component) in the program from a transport stream (hereinafter referred to as a TS) received by a television receiver. The partial TS is used as a format (content format) when transmitting the content received by the television receiver to an electronic device such as another television receiver or a tablet terminal.

Since the contents can be used in the external tablet terminal or the like by transmitting and receiving the partial TS in this way, it is necessary to describe identifiers such as a network _ id, a transport _ stream _ id, and a service _ id in the partial TS for the purpose of copyright protection or the like in order to make a source where a program which is a base of the partial TS generation is broadcast clearly visible.

Similarly, in advanced broadband digital satellite broadcasting, which started in 12 months in 2018, there is a demand for content to be transmitted from a corresponding television receiving apparatus to a peripheral electronic device.

Prior art documents

Patent literature

[ Nonpatent document 1 ] ARIB STD-B21.10 edition "receiving apparatus for digital broadcasting" standard specification

[ Nonpatent document 2 ] ARIB STD-B63.7 edition "advanced broadband digital satellite broadcasting receiver" standard specification

Disclosure of Invention

However, in the advanced broadband digital satellite broadcasting, a new multiplexing method based on the MMT/TLV method is adopted, and if the input/output content format of the high-speed digital interface directly meets the specification of the partial stream specified by the conventional partial TS, the source (information source) of the broadcast program cannot be clearly seen in the peripheral electronic device such as the tablet terminal.

Accordingly, an object of the present invention is to provide a digital content transmitting apparatus and a digital content transmitting method, which use a content format of a partial stream so that a source of a broadcast program transmitted based on an MMT/TLV scheme is clearly visible.

A digital content transmission device according to one embodiment of the present invention includes a reception unit that receives a transmission signal transmitted based on an MMT/TLV system, an acquisition/separation unit that acquires the MMT/TLV stream from the transmission signal, a partial stream generation unit that extracts associated data for specifying a source of a specific content from the 1 st control information data and generates a partial stream from the 2 nd control information data and the component data, and a transmission unit that transmits the partial stream, wherein the 2 nd control information data is generated by including the associated data.

A digital content receiving apparatus according to one embodiment of the present invention includes a receiving unit that receives a partial stream generated from a transmission signal transmitted based on an MMT/TLV system, a separation acquiring unit that separates and acquires component data and control information data related to specific content from the partial stream, and an extracting unit that extracts related data for specifying a source of the specific content from the control information data.

Drawings

Fig. 1 is a diagram showing an example of a television receiving apparatus and an electronic device according to the present embodiment which support digital broadcasting based on the MMT/TLV scheme;

fig. 2 is a block diagram showing an example of a functional configuration of a television receiving apparatus according to the present embodiment, which supports digital broadcasting based on the MMT/TLV system;

fig. 3 is a block diagram showing an example of a functional configuration of an electronic device corresponding to digital broadcasting based on the MMT/TLV scheme of the embodiment;

fig. 4 is a flowchart showing an example of processing actions of an electronic device on the information source side of the television receiving apparatus corresponding to digital broadcasting based on the MMT/TLV scheme as the embodiment;

fig. 5 is a diagram showing an example of the constitution of MH-SIT transmitted by partial TLV stream of the embodiment;

fig. 6 is a diagram showing an example of the constitution of the descriptor streamed by the partial TLV stream of the embodiment;

fig. 7 is a flowchart showing an example of processing actions of the electronic device on the client side of the embodiment;

fig. 8 is a diagram showing an example of a network of advanced broadband digital satellite broadcasting of modification 1;

fig. 9 is a block diagram showing an example of a functional configuration of a television receiving apparatus in a network of advanced broadband digital satellite broadcasting according to modification 2;

fig. 10 is a flowchart showing an example of an operation when the television receiving apparatus according to the modification transmits a partial TLV stream;

fig. 11 is a block diagram showing an example of a functional configuration of a television receiving apparatus that receives a partial TLV stream in this modification;

fig. 12 is a flowchart showing an example of the operation when the television receiving apparatus receives a partial TLV stream in this modification.

Description of the reference numerals

1 \8230, a television receiving device 2 \8230, an electronic device 14 \8230, a demultiplexer 18 \8230, a partial TLV stream generation section 19 \8230, an interface 21 \8230, an interface 22 \8230, a partial TLV stream processing section 23 \8230, a decoder 24 \8230, an output processing section 25 \8230, an output section 26 \8230, an information source detection section 27 \8230, a control section 28 \8230, a user interface 110 \8230anda control section.

Detailed Description

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

(embodiment mode)

Fig. 1 is a diagram showing an example of a television receiving apparatus and an electronic device according to the present embodiment, which are compatible with digital broadcasting based on the MMT/TLV scheme.

The television receiving apparatus 1 receives a broadcast signal of digital broadcasting based on the MMT/TLV system, and acquires content transmitted by the broadcast signal. The electronic devices 2A, 2B, and 2C (referred to as electronic devices 2 when no particular distinction is necessary) have interfaces 3A, 3B, and 3C (referred to as interfaces 3 when no particular distinction is necessary) that can communicate with the television receiving apparatus 1, respectively, and acquire contents transmitted by a broadcast signal via the interfaces 3, and display and output the contents. In the present embodiment, the number of the electronic devices 2 is 3, but the number may be any number of 1 or more depending on the interface of the television receiving apparatus 1.

The electronic device 2 has a function (resolution, frame rate, others) capable of utilizing content (broadcast program) transmitted by the MMT/TLV system. The electronic device 2 may be, for example, a tablet terminal, a monitor, a television receiving apparatus, or the like.

The interface 3 between the television receiver 1 and the electronic device 2 may be wired or wireless. Further, a Network conforming to DLNA (registered trademark) or an extension thereof may be formed by the television receiving apparatus 1 and the electronic device 2 so as to enable communication. The electronic device 2 may be a smartphone as long as it has an interface capable of communicating with the television receiving apparatus 1.

Fig. 2 is a diagram showing an example of a functional configuration of a television receiving apparatus according to the present embodiment, which supports digital broadcasting based on the MMT/TLV scheme.

The television receiving apparatus 1 receives a broadcast signal of digital broadcasting by the MMT/TLV system through the antenna 11, and demodulates the broadcast signal through the tuner 12 to acquire digital data (TLV stream) in the TLV (Type Length Value) format. For the acquired TLV stream, the scrambled data is descrambled in the descrambler 13, converted from the TLV stream to an IP/UDP stream in the demultiplexer 14, further converted to an MMT (Mpeg Media Transport) stream, and separated into component data (e.g., encoded image data, voice data, text data, etc.) and SI (Signaling Information) data as control Information data. The component data is decoded into service data such as an image signal, a voice signal, and text data by the decoder 15 and played. The service data is input to the output processing unit 16, and output from the output unit 17 such as a display device or a speaker, with the output time, display method, and the like adjusted. SI data is control information related to a broadcasting system, such as information related to a broadcast program and control information related to multiplexing of IP packets. Although not shown in the figure, the time information data in the NTP format stored in the TLV stream in the IP/UDP format is also separated by the demultiplexing unit 14, and the clock synchronization signal is reproduced and used for clock control in the decoder 15 and the output processing unit 16.

The partial TLV stream generators 18A, 18B, and 18C (referred to as the partial TLV stream generator 18 when no particular distinction is required) extract component data and control information data constituting the selected content (broadcast program) from the TLV stream and the MMT stream separately acquired by the demultiplexer 14, and edit the component data and the control information data to generate a partial TLV stream. The TLV stream is a stream to which IP information and the like are added to the MMT stream. Therefore, since the MMT stream is contained in the TLV stream, hereinafter, a case where both are expressed will be referred to as MMT/TLV stream.

The partial TLV stream is referred to as a partial TS based on the MPEG-2TS scheme. The partial TS based on the MPEG-2TS scheme is a TS obtained by selecting and extracting a specific program and a component in the program from a transport stream (hereinafter referred to as a TS, and particularly referred to as a full TS when distinguished from the partial TS) obtained from a broadcast signal, and the specification is defined in ARIB-STD-B21.

In the present embodiment, a partial TLV stream, which is a format of content for advanced broadband digital satellite broadcasting, is defined with reference to a partial TS based on the MPEG-2TS scheme. The following description is made for the partial TLV stream. The partial TLV stream is sent from interface 19.

The interface 19 may include 1 or more interfaces, and fig. 2 shows an example in which interfaces 19A, 19B, and 19C (which are referred to as the interfaces 19 unless otherwise specified) are provided. 19A, 19B, and 19C generate and decompose frame data according to predetermined communication protocols, and transmit and receive data via a wired or wireless medium. The interface 19 may have an encryption and encryption/decryption function such as descrambling.

The control unit 110 includes, for example, a CPU, and controls each function of the television receiving apparatus 1. For example, the control unit 110 establishes connection via external communication via various interfaces including the interface 19, and controls the operation of the partial TLV stream generation unit 18. The control unit 110 controls each function of the television receiving apparatus 1 in accordance with a control signal from a user interface 111 such as a remote controller provided in the television receiving apparatus 1.

Fig. 3 is a block diagram showing an example of a functional configuration of an electronic device according to the present embodiment, which corresponds to image/voice playback based on the MMT/TLV system.

The electronic device 2 receives part of the TLV stream transmitted by the television receiving apparatus 1 via the interface 21. The interface 21 transmits and receives data to and from the interface 19 via a wired or wireless medium, and generates and decomposes frame data according to a communication protocol. Further, the encryption and decryption functions are provided in accordance with the interface 19.

The partial TLV stream processing unit 22 processes the received partial TLV stream to obtain component data and SI data. The component data is input to the decoder 23 together with the SI data, converted into service data, and output to the output processing unit 24. The service data is output as an image, audio, text, or the like from an output unit 25 such as a signal display device or a speaker by adjusting output timing, a display method, and the like in the output processing unit 24.

The SI data output from the partial TLV stream processing unit 22 is input to the information source detection unit 26. The information source detection unit 26 extracts related data (also referred to as reference information) included in the SI data, and detects the source of the content such as the broadcast operator of the program from the related data. The detected source of the content is input to the output processing unit 24, and text information relating to the source of the content is appropriately superimposed and displayed on a program being played, for example, as needed. Instead of displaying the text information, for example, a logo (logo) of the broadcasting operator may be displayed. The correspondence between the associated data included in the SI data and the corresponding flag may be set in advance in a memory or the like of the electronic device 2 and may be used for display. The correspondence relationship may be included in the broadcast signal, acquired from the broadcast signal received by the television receiving apparatus 1, and forwarded to the electronic device 2, or may be acquired directly or via the internet when the electronic device 2 can receive the broadcast signal.

The information source detecting unit 26 can store the related data extracted from the SI data in a memory as recorded data, and can output the data to the outside through the internet when connected to the internet.

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 connection of external communication via various interfaces including the interface 21 and controls the operation of the information source detection unit 26. The control unit 27 controls each function of the electronic device 2 in accordance with a control signal from a user interface 28 such as a remote controller provided in the electronic device 2.

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

The television receiving apparatus 1 and the electronic device 2 can be regarded as a relationship of a source and a sink (or a server and a client). For example, the television receiving apparatus 1 as the source (or server) outputs a partial TLV stream, and the electronic device 2 as the sink (or client) receives a partial TLV stream output from the source. In the present embodiment, the following example is shown: the user specifies a content (program) from the sink, i.e., the electronic equipment 2, and the electronic equipment 2 acquires associated data contained in SI data transmitted from the source, i.e., the television receiving apparatus 1, and makes the source of the content clearly visible.

Although the processing of 1 electronic device 2 (e.g., the electronic device 2A) and the television receiving apparatus 1 is described below, the same processing can be performed for other electronic devices 2 (e.g., the electronic devices 2B and 2C).

When the user designates a 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 in response to a trigger from the electronic device 2. In the present embodiment, the following example is shown: in the case where the content is specified, the television receiving apparatus 1 automatically transmits the associated data that makes the source of the program clearly visible.

Fig. 4 is a flowchart showing an example of processing operations of the electronic device on the server side of the television receiving apparatus supporting digital broadcasting based on the MMT/TLV system according to this embodiment.

The control unit 110 of the television receiving apparatus 1 recognizes the designated content (specific program, component in the program, etc.) of the electronic device 2 transmitted from the electronic device 2 (step S11). The control section 110 outputs the designated content to the partial TLV stream generation section 18. Upon receiving the MMT/TLV stream from the demultiplexing unit 14, the partial TLV stream generating unit 18 extracts the component data and the associated SI data related to the specified content received from the control unit 110 from the MMT/TLV stream (yes in step S12, step S13). Associated data is extracted from the extracted SI data (step S14). Specifically, 3 pieces of related data, i.e., network _ id as a network identifier, tlv _ stream _ id as a tlv stream identifier, and service _ id as a service identifier, are extracted from SI data. The 3 pieces of association data are described in detail in the description of fig. 5 and 6. Generally, from the 3 pieces of association data, the location area of a broadcast program in MMT/TLV-based digital broadcasting (e.g., advanced broadband digital satellite broadcasting) can be uniquely determined. Therefore, in order to make the area of the broadcast program related to the specified content clearly visible from the electronic device 2, the television receiving apparatus 1 needs to transmit 3 pieces of associated data network _ id, tlv _ stream _ id, and service _ id to the electronic device 2. Thus, a partial TLV stream containing 3 associated data is generated (step S15).

Here, a partial TLV stream is explained in detail. The partial TLV stream is in the form of advanced broadband digital satellite broadcast oriented content defined with reference to the MPEG-2 based partial TS.

In general, a partial TS is obtained by selectively extracting a specific program and components in the program from a broadcast signal in which at least 1 program of HD (High Definition) or SD (Standard Definition) is multiplexed in the TS. In the TS system, the source of a broadcast program can be generally specified uniquely by a network _ id, a transport _ stream _ id, and a service _ id. Therefore, in the partial TS, usually, the network _ id, transport _ stream _ id, and service _ id are also included as related data extracted from the broadcast signal. In the partial TS, in order to transmit the associated data, it is necessary to include a control information table such as a PAT, a PMT, and an SIT as transmission control information. transport _ stream _ id is described in PAT, service _ id is described in PMT, and network _ id is described in SIT.

However, in the MMT/TLV stream, although there are a PLT corresponding to the PAT and an MPT corresponding to the PMT in terms of the specification, there is no control information table corresponding to the SIT. In addition, although it is assumed that the PLT and MPT must be used in the partial TLV stream, only a service _ id field (field) exists in the PLT and MPT.

Therefore, in this embodiment, MH-SIT corresponding to SIT included in a partial TLV stream is newly defined, service _ id is described, and Network _ id and TLV _ stream _ id are set in MH-Network identification descriptor (Network identification descriptor) arranged in MH-SIT. Therefore, only by the MH-SIT, network _ id, tlv _ stream _ id, and service _ id, which are reference information capable of uniquely identifying the source of service data (program), can be set. Further, the control information table in which the reference information is put may be put into a plurality of control information tables separately, so that the plurality of reference information can be handled independently, instead of putting the control information table in 1 control information table. The reference information is not limited to the control information table as long as the reference information can be transmitted.

Since the transmission frequency of the SIT defined in the partial TS is small and the communication load is also small, by defining MH-SIT with the partial TS as a reference and setting 3 associated data therein, it is possible to transmit the partial TLV stream without imposing a large load on the communication.

Fig. 5 is a diagram showing an example of the configuration of the MH-SIT, which is a control information table transmitted by a partial TLV stream according to this embodiment. In fig. 5, a service _ id is set in the identifier 51.

The service _ id is a 16-bit field that functions as a tag for identifying the service from other services in the TLV stream. The service identification is equal to the packet ID (MMT _ packet _ ID _ byte) in the MMT packet table.

Hereinafter, meanings of the other identifiers shown in fig. 5 are shown.

Section _ syntax _ indicator

The segment syntax indicator is a 1-bit field, always set to "1".

Section _ length (section length)

It is set to a 12-bit field. section _ length specifies the number of bytes of a section from the end of the section including the CRC after the field. In order for the full segment length to not exceed 4096 bytes at maximum, the segment length may not exceed 4093 bytes.

Version number

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

Current _ next _ indicator (current subsequent indicator)

If the 1-bit indicator is "1", it indicates that the table is the current table, and if "0", it indicates that the transferred table is not yet applied and is used as the next table.

Section _ number (section number)

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

Last section number (Final section number)

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

Transmission _ info _ loop _ length (transfer information cycle length)

The 12-bit field indicates the number of full bytes of the descriptor that describes the transport parameters of the partial TLV stream.

Running _ status

The 3-bit field indicates the running state of the event of the original stream. This is the running state of the current event of the original stream. If there is no present event in the original stream, the state is considered to be non-executing. The meaning of the value of the operating state is defined by ARIB STD-B60.

Service _ Loop _ length (service cycle length)

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

·CRC＿32(CRC)

Complying with ITU-T recommendation h.222.0.

Fig. 6 is a diagram showing an example of the configuration of descriptors transmitted through partial TLV streams of this embodiment.

The MH-network identification descriptor is defined, and a network _ id is set to the identifier 61 and a tlv _ stream _ id is set to the identifier 62. In addition, the descriptor is arranged in the descriptor area 52 of fig. 5.

The network _ id is a 16-bit field describing a value of network identification of the distribution system that generates the partial TLV stream. In the original allocation system, this value is described in TLV-NIT, and the allocation of this field value is performed by specification of a standardization body.

TLV _ stream _ id shows the identification number of the TLV stream. Hereinafter, meanings of other descriptors shown in fig. 6 are shown.

Count _ code (country code)

The 24-bit field represents the name of a country using a 3-bit letter code specified in ISO 3166. Using this descriptor, the country of the distribution system that generated the partial TLV stream is indicated. Each literal is encoded in 8 bits in compliance with ISO8859-1, inserted into the 24-bit field in its order. The 3-bit alphabet in japan is encoded as "JPN" as follows.

“0100 1010 0101 0000 0100 1110”

Media _ type (media type)

The 16-bit field is inserted with a 2-bit alphabet encoding, and the type of media is expressed by the 2-bit alphabet. Using this descriptor, the media type of the distribution system that generated the partial TLV stream is indicated. Each literal is encoded in 8 bits in compliance with ISO8859-1, inserted into the 16-bit field in its order. The category of media is as follows.

(value, meaning): (0 x4142, altitude BS/advanced broadband CS)

Network _ id (network identification): it is a 16-bit field that describes the value of the network identification of the distribution system that generated the partial TLV stream. In the original distribution system, the value is described in TLV-NIT, and the value of the data field is distributed by specification of a standardization body.

Private data

It is a field of 8 × N bits, having a value defined individually.

Returning to step S15 in fig. 4, the partial TLV stream generation unit 18 sets 3 pieces of associated data for the MH-SIT, and then generates SI data for the partial TLV stream including at least the MH-SIT (hereinafter referred to as partial SI data). Since the PLT and MPT include service _ id, the MH-SIT includes network _ id and tlv _ stream _ id, and partial SI data is generated including at least PLT, MPT, and MH-SIT.

The partial TLV stream generating section 18 generates component data (hereinafter, referred to as partial component data) oriented to the partial TLV stream from the component data specifying the content, and generates the partial TLV stream from the partial SI data and the partial component data (step S15).

In the present embodiment, an example is described in which service _ id, network _ id, and tlv _ stream _ id are described in the defined MH-SIT, but an identifier as related data may be described in the MPT as another control information table.

In the present embodiment, an example is shown in which network _ id and tlv _ stream _ id are described in the MH-network identification descriptor, but for example, a data field in which tlv _ stream _ id is described in the MH-network identification descriptor may not be provided, and may alternatively be described in reserved _ future _ use (16) of the MH-SIT.

The partial TLV stream is sent from interface 19 (step 16). If the MMT/TLV stream cannot be received from the demultiplexing part 14, the partial TLV stream generating part 18 ends the process (no at step S12).

Fig. 7 is a flowchart showing an example of processing operation of the electronic device on the client side according to this embodiment, and the electronic device 2 is used as the electronic device on the client side.

Upon receiving the partial TLV stream from the interface 21, the partial TLV stream processing unit 22 of the electronic device 2 performs processing such as demultiplexing on the partial TLV stream and outputs partial sub data and partial SI data (yes in step S21, step S22). For example, in step 22, the partial TLV stream processing unit 22 performs descrambling processing (in the case where scrambling processing is performed on the partial TLV stream and encryption and decoding are required) and demultiplexing processing, as in the case where the television receiving apparatus 1 receives the MMT/TLV stream. In the demultiplexing process, partial sub-component data and partial SI data are acquired from the partial TLV stream. The partial component data and the partial SI data output from the partial TLV stream processing section 22 are input to the decoder 22, and are decoded by the decoder 22 to be converted into service data such as an image signal, a voice signal, and character data (step 23). The service data is input to the output processing unit 24, output time, display method, and the like are adjusted (step S24), and output from the output unit 25 such as a display device and a speaker (step S25).

On the other hand, in step 22, the partial SI data output from the partial TLV stream processing unit 22 is input to the information source extracting unit 26, and the information source extracting unit 26 extracts the related data from the partial SI data. Specifically, 3 pieces of related data, i.e., network _ id, tlv _ stream _ id, and service _ id, are extracted from the partial SI data. The information source extracting unit 26 determines, for example, an application area of a broadcast program in the advanced broadband digital satellite broadcasting based on the extracted 3 pieces of associated data, and outputs the application area to the output processing unit 24 (step S26). The output processing unit 24 adjusts the output time, display method, and the like of the application area information of the broadcast program input from the information source extracting unit 26, and then outputs the adjusted application area information to the output unit 25 together with the service data input from the decoder 23 (step S24), and the output unit 25 outputs the area information of the broadcast program (step S25).

By performing the above-described processing in parallel for each of the electronic devices 2A, 2B, and 2C, the interaction between the electronic devices 2A, 2B, and 2C and the television receiving apparatus 1 can be performed simultaneously, and for example, the electronic devices 2A, 2B, and 2C can obtain the same content at the same time, and if different specified contents are specified from the electronic devices 2A, 2B, and 2C, the different contents can be obtained.

In the present embodiment, by including the MH-SIT and MH-network identification descriptors defined as shown in fig. 5 and 6 in the partial TLV stream, it is possible to determine the origin of the content received by the electronic device 2, which is the client side.

In the partial TS stream based on the TS scheme, 3 pieces of associated data are included in the 3 tables of PAT, PMT, and SIT, but in the example of the present embodiment, by putting 3 pieces of associated data in MH-SIT, the processing load is reduced, and the processing speed is improved. In addition, similarly to the SIT in the partial TS stream, the MH-SIT has a characteristic that the transmission frequency is smaller than that of the control information table such as the other PLT and MPT, and therefore, the effect of reducing the processing load is also obtained as compared with the case where the PLT and MPT are incorporated.

As described above, according to the present embodiment, it is possible to provide a digital content transmission apparatus and a digital content transmission method that use a content format of a partial stream in which an application area of a broadcast program transmitted by the MMT/TLV system is clearly visible.

(modification 1)

Fig. 8 to 12 are diagrams showing modifications of the above-described embodiment, and corresponding parts and similar parts of the respective modules shown in the above-described embodiment are denoted by the same or similar reference numerals.

Fig. 8 is a diagram showing an example of a network of advanced broadband digital satellite broadcasting according to modification 1, and shows an example in which the DIRD10A has functions of the descrambler 13, the demultiplexer 14, the decoder 15, the output processor 16, the partial TLV stream generator 18, the interface 19, and the controller 110 in fig. 1. This modification shows an example of the following case: in the home network, the television receiver 1A is a server-side electronic device, and the smart phone 2BA and the tablet pc 2CA are client-side electronic devices 2.

The television receiver 1A and the electronic devices 2BA and 2CA may be provided with encryption and decryption functions. The television receiving apparatus 1A may further include a stream distribution management unit that manages distribution information (distribution count, distribution destination, and the like) when a partial TLV stream is distributed. Further, the management information of the flow distribution management unit may be transmitted to the charging management unit.

(modification 2)

Fig. 9 is a block diagram showing an example of a functional configuration of a television receiver apparatus according to the advanced broadband digital satellite broadcasting of modification 2, and the same or similar reference numerals are given to parts corresponding to the functions of the television receiver apparatus shown in fig. 2.

The television receiving apparatus 1A in fig. 9 shows an example in which the functions corresponding to the partial TLV stream generating unit 18 in fig. 2 are separated into the control unit 110A and the multiplexing unit 18. The demultiplexer 14 and the decoder 15 in fig. 2 correspond to the MMT demultiplexer 14A, the image decoder, the audio decoder, and the EPG multimedia decoder 15A, respectively. The image decoded signal obtained from the image decoding unit is supplied to a display of the output unit, and the audio signal output from the audio decoding unit is supplied to an audio system (speaker system) of the output unit.

Fig. 10 shows an operation example in which the television receiving apparatus 1A in fig. 9 operates under the control of the control unit 110A. When a signal requesting a partial stream is detected from the 2 nd television receiving apparatus 2AA (TV 2) (SA 11), processing of a partial TLV stream is started (SA 12). The partial TLV stream is extracted from the MMT demultiplexing unit 14A, prepared, and output to the multiplexing unit 18A (SA 00, SA 16).

The control unit 110A generates the reference information (SA 13, SA 14) as described in fig. 5 and fig. 6, outputs the reference information to the multiplexing unit 18A, and multiplexes the reference information as a partial TLV stream in the multiplexing unit 18A (SA 15). Thereby, the partial TLV stream in which the MH-SIT including the reference information is multiplexed is transmitted to the television receiving apparatus 2B (SA 17).

In addition, network _ id, TLV _ stream _ id, and service _ id for determining the source may be inserted into the partial TLV stream in any position and format. The time of transmission may be changed, or may be the transmission start time of a partial TLV stream.

Fig. 11 shows an example of the configuration of the television receiver 2AA that receives a partial TLV stream transmitted from the television receiver 1A in this modification.

The functional configuration of the television receiving apparatus 2AA is the same as that of the television receiving apparatus 1A shown in fig. 9, and similar reference numerals are given to corresponding functional blocks. Reference numerals 12A, 13A, 14A \8230;, reference numerals 2A12, 2A13, 2A14 \8230;, reference numerals 2A12, 2A13, 2A 14;, and the like, of the television receiving apparatus 1A shown in fig. 12. The partial TLV stream transmitted from the television receiver 1A is input to the demultiplexing unit 2a18 via the interface 21A, and the control unit 2a110 analyzes the reference information, whereby the source of the content of the partial TLV stream becomes clear. The MMT/TLV stream is input to the MMT demultiplexing unit 2a14, and the image encoded data and the audio encoded data of the packet are extracted and decoded by the image decoding unit and the audio decoding unit, respectively.

Fig. 12 is a flowchart showing an example of the operation of the television receiving apparatus 2AA in fig. 11. If there is a reception instruction or a reception request for the partial TLV stream, reception processing for the partial TLV stream is started (SB 11, SB 12). The control unit 2a110 analyzes the reference information multiplexed in the partial TLV stream, and determines the source of the content multiplexed in the stream (SB 13, SB14, SB 15). On the other hand, the output processing unit 2a15 processes the content multiplexed in the stream and outputs the processed content as data for display and audio output (SB 20). If the reception of no partial TLV stream stops, the display of the content multiplexed in that stream continues. However, when the reception apparatus is turned off or reception is stopped, the above operation is stopped (SB 21).

As described above, according to the present modification, it is possible to provide a digital content transmission apparatus and a transmission method that adopt a content format of a partial stream that makes a region of a broadcast program transmitted by the MMT/TLV method clearly visible to information terminals on different client sides having different function configurations on a server side that provides content.

In the above embodiment and modification, the case where the MMT/TLV stream is acquired from the broadcast signal received from the tuner is used, but an MMT/TLV stream based on the MMT/TLV scheme acquired via the internet may be used. The MMT/TLV stream may be temporarily stored in a storage device or the like, not shown, and the data may be input to the demultiplexer 14 in fig. 2, for example, to generate a partial TLV stream.

The above-described gist of the present system can be described as follows.

(A1) A transmission device is provided with: a receiving unit that receives a broadcast signal in which an MMT/TLV system is used as a content format; a tuner that selects a desired TLV stream from the broadcast 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 an SI (Signaling Information: signaling Information) that is a control signal; and a partial TLV stream generation unit that generates a partial TLV stream including reference information and the TLV stream selected by the tuner, wherein the reference information includes a network identifier (network _ id), a TLV stream identifier (TLV _ stream _ id), and a service identifier (service _ id).

(A2) A transmission method of a transmission apparatus, the transmission apparatus having: a receiving unit that receives a broadcast signal in which an MMT/TLV system is used as a content format; a tuner that selects a desired TLV stream from the broadcast signal; and a control section, wherein,

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 an SI (Signaling Information) as a control signal, and a partial TLV stream including reference Information including the network identifier (network _ id), the TLV stream identifier (TLV stream _ id), and the service identifier (service _ id) selected by the tuner is generated and output.

(B1) A receiving apparatus, wherein a partial TLV stream transmitted as a stream including a TLV stream selected from a broadcast signal using an MMT/TLV system as a content format corresponds to the TLV stream, a network identifier (network _ id), a TLV stream identifier (TLV _ stream _ id), and a service identifier (service _ id) are identifiers extracted from SI included in the broadcast signal as a control signal, reference information defined as information for the partial TLV stream is included in 1 table, and at least a word _ id, a TLV _ stream _ id, and a service _ id for determining a source are inserted into the reference information,

the receiving apparatus includes:

a receiving section that receives the partial TLV stream, an

And a determination unit that analyzes the network _ id, TLV _ stream _ id, and service _ id included in the reference information, and determines the source of the content of the partial TLV stream.

(B2) A receiving method of a receiving apparatus, wherein a partial TLV stream, which is transmitted as a stream including reference Information and a TLV stream selected from a broadcast signal using an MMT/TLV system as a content format, corresponds to the TLV stream, a network identifier (network _ id), a TLV stream identifier (TLV _ stream _ id), and a service identifier (service _ id) are extracted from an SI (Signaling Information) as a control signal included in the broadcast signal, at least the network _ id, the TLV _ stream _ id, and the service _ id used for determining a source are inserted into reference Information defined as Information used for the partial TLV stream, and the partial TLV stream is transmitted as a stream including the reference Information and the TLV stream,

the receiving device, which includes a receiving unit and a control unit, receives the partial TLV stream, analyzes the network identifier (network _ id), the TLV stream identifier (TLV _ stream _ id), and the service identifier (service _ id) included in the reference information, and determines the source of the content of the partial TLV stream.

(C) An encryption/decryption function for security may be provided between the transmitting side and the receiving side.

(D) If the source of the partial TLV stream is clarified, the apparatus may further output identification data of the source to the display unit, and/or if the source of the partial TLV stream is clarified, the apparatus may further output audio data specific to the source to the audio output unit.

(E) The television receiving apparatus may further include a stream distribution management unit that manages distribution information (distribution count, distribution destination, and the like) of the partial TLV stream when the partial TLV stream is distributed. Further, the management information of the flow distribution management unit may be transmitted to the charging management unit.

(E1) In the present system, there is included an organization which defines an MH-SIT corresponding to a Selection Information Table (SIT) multiplexed in a broadcast signal in an MMT/TLV system and transmits and receives the MH-SIT.

Here, the MH-SIT is reference information including all of the network identifier (network _ id), the TLV stream identifier (TLV _ stream _ id), and the service identifier (service _ id), and is information capable of determining the source of the content included in the partial TLV stream from the 3 identifiers.

According to at least 1 embodiment described above, it is possible to provide a digital content transmission apparatus, a transmission method, which adopt a content form of a partial stream so that an area of a broadcast program transmitted based on the MMT/TLV method is clearly visible.

Several embodiments of the present invention have been described, but these embodiments have been shown by way of example and are not intended to limit the scope of the claims appended to the present application. These new embodiments may be implemented in various other forms, and various omissions, substitutions, and changes may be made without departing from the spirit of the present application. These embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof. Further, among the respective constituent elements of the claims, a case where the constituent elements are expressed by being divided, a case where a plurality of the constituent elements are expressed by being combined, or a case where the constituent elements are expressed by being combined is also a scope of the present invention. In addition, a plurality of embodiments may be combined, and an example configured by the combination is also a scope of the invention.

In addition, in the drawings, the width, thickness, shape, and the like of each portion are schematically shown in some cases as compared with the actual form in order to make the description clearer. The present invention is also applicable to a device in which the claims are expressed as a control logic, a program including instructions to be executed by a computer, and a computer-readable nonvolatile storage medium in which the instructions are described. The terms and expressions used herein are not limited thereto, and other expressions may be included in the scope of the claims attached to the present application as long as they have substantially the same contents and the same substance.

Claims (12)

1. A digital content transmission device is provided with:

a reception unit that receives a transmission signal transmitted in accordance with the MMT/TLV system;

an acquisition separation section that acquires an MMT/TLV stream from the transmission signal and separates component data and 1 st control information data related to a specific content from the MMT/TLV stream;

a partial stream generating unit that extracts associated data from the 1 st control information data in order to specify a source of a specific content, the extracted associated data including at least an extracted network identifier network _ id, a tlv stream identifier tlv _ stream _ id, and a service identifier service _ id, and generates a partial stream from 2 nd control information data and the component data, the 2 nd control information data being generated in such a manner that the associated data is included; and

and a transmitting unit which transmits the partial stream so that the source of the specific content can be clearly displayed by receiving an application area of a broadcast program of the partial stream transmitted based on the MMT/TLV scheme.

2. The digital content transmitting apparatus according to claim 1,

the associated data is described in 1 control information table.

3. The digital content transmitting apparatus according to claim 2,

the control information table is MH-SIT based on the SIT, i.e., selection information table, specified in ARIB STD-B21.

4. The digital content transmitting apparatus according to claim 3,

at least 1 of the associated data is an MH-network identification descriptor recorded in the control information table, wherein the MH-network identification descriptor is based on a network identification descriptor specified in ARIB STD-B21.

5. The digital content transmitting apparatus according to any one of claims 1 to 3,

the specific content is specified from the outside.

6. A digital content transmission method, comprising:

receiving a transmission signal transmitted based on the MMT/TLV mode,

obtaining the MMT/TLV flow from the sending signal,

separating the component data and the 1 st control information data related to the specific content from the MMT/TLV stream,

extracting associated data for determining a source of a specific content from the 1 st control information data, the associated data including at least a network identifier network _ id, a tlv stream identifier tlv stream _ id, and a service identifier service _ id;

generating a partial stream from the 2 nd control information data generated containing the association data and the component data,

and transmitting the partial stream so that an application area of a broadcast program receiving the partial stream transmitted based on the MMT/TLV scheme can clearly display a source of the specific content.

7. A digital content receiving apparatus includes:

a receiving part which receives a partial stream generated based on the digital content transmitting apparatus of claim 1, the partial stream being generated based on a transmission signal which is a signal transmitted based on the MMT/TLV scheme so that a source of a specific content can be clearly displayed in an application area of a received broadcast program by the partial stream transmitted based on the MMT/TLV scheme;

a separation acquisition section that separately acquires component data and control information data related to specific content from the partial stream; and

and an extracting unit that extracts, from the control information data, associated data for obtaining a source of the specific content, the associated data including at least the extracted network identifier network _ id, the extracted tlv stream identifier tlv _ stream _ id, and the extracted service identifier service _ id.

8. The digital content receiving apparatus according to claim 7,

the associated data is described in 1 control information table.

9. The digital content receiving device according to claim 8,

the control information table is MH-SIT based on the SIT, i.e., selection information table, specified in ARIB STD-B21.

10. The digital content receiving apparatus according to claim 9,

at least 1 of the associated data is an MH-network identification descriptor recorded in the control information table, wherein the MH-network identification descriptor is based on a network identification descriptor specified in ARIB STD-B21.

11. The digital content receiving apparatus according to any one of claims 7 to 9,

the digital content receiving apparatus specifies the specific content.

12. A digital content receiving method, comprising:

receiving a partial stream generated based on the digital content transmission method of claim 6, the partial stream being generated based on a signal transmitted based on the MMT/TLV scheme, so that a source of a specific content can be clearly displayed according to an application area of a received broadcast program of the partial stream transmitted based on the MMT/TLV scheme;

component data and control information data related to specific content are separately acquired from the partial stream,

and extracting associated data for knowing the source of the specific content from the control information data, wherein the associated data at least comprises an extracted network identifier, network _ id, a tlv stream identifier, tlv stream _ id and a service identifier, service _ id.

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