WO2016031914A1

WO2016031914A1 - Broadcasting signal transmission device, broadcasting signal reception device, television receiver, broadcasting signal transmission system, control program, and recording medium

Info

Publication number: WO2016031914A1
Application number: PCT/JP2015/074227
Authority: WO
Inventors: 卓也長田
Original assignee: シャープ株式会社
Priority date: 2014-08-29
Filing date: 2015-08-27
Publication date: 2016-03-03

Abstract

This receiver (2) comprises: a control information acquisition unit (42) that acquires packets including an MPT from among a plurality of MMT-protocol packets received as a digital broadcasting signal; and a demultiplexing unit (23) that reconstructs content from the plurality of packets on the basis of acquired control information. The MPT includes attribute information related to a voice component of said content.

Description

Broadcast signal transmitting apparatus, broadcast signal receiving apparatus, television receiver, broadcast signal transmission system, control program, and recording medium

The present invention relates to a broadcast signal transmitting apparatus that transmits a digital broadcast signal, a broadcast signal receiving apparatus that receives the digital broadcast signal, a television receiver, a broadcast signal transmission system, a control program, and a recording medium.

In recent years, research and development of video technology, etc. that contributes to a dramatic increase in image quality that surpasses high-definition television broadcasting (HDTV) has progressed rapidly, and ultra-high-definition television broadcasting (UHDTV) that supports 4K / 8K. ) Is expected to be realized. For this reason, the UHDTV standard is being developed. Note that 4K UHDTV has a pixel count of 3840 horizontal x 2160 vertical = 8,294,400, which is four times that of a conventional full HDTV (horizontal 1920 x vertical 1080 = 2,073,600). In addition, 8K UHDTV has the number of pixels of 7680 × 4320 = 33,177,600, which is 16 times that of the full HDTV.

Japanese Patent Publication “Japanese Patent Laid-Open No. 06-132912 (published May 13, 1994)”

The UHDTV standard supports 22.2ch stereophonic sound system. In addition, the UHDTV needs to support various audio formats used in conventional TV broadcasting such as the HDTV. In addition, the broadcasting service and the communication service are linked to each other. For this reason, it is necessary to support various audio formats used in the communication service.

For this reason, receivers such as TV receivers are provided with a memory that stores in advance a plurality of firmwares respectively corresponding to a plurality of audio formats. When receiving the audio data, the audio decoder first analyzes the header of the audio data and specifies the audio format of the audio data. Next, the audio decoder reads firmware corresponding to the specified audio format from the memory, and rewrites the internal memory of the audio decoder with the firmware. The audio decoder decodes the audio data based on the rewritten firmware.

Thereby, the receiver can support various audio formats. However, in this case, it takes time to decode the audio data. As a result, it takes time from when the receiver receives the audio data to output the audio reproduced from the audio data.

Also, not all of the above receivers are compatible with 22.2ch stereophonic sound systems. Furthermore, it is difficult for an audio decoder to support all of the various audio formats used in communication services due to device performance and limitations of built-in memory.

Therefore, if the audio decoder analyzes the header of the audio data and determines that the audio cannot be reproduced from the audio data, the receiver needs to notify a caution (warning) indicating that. However, also in this case, since the audio decoder needs to analyze the header of the audio data, it takes time until the receiver notifies the caution after the audio data is received.

In addition, the data length of the header is usually limited. Therefore, compatible audio formats, the number of audio channels, and the like are also limited. On the other hand, in the audio packet decoder described in Patent Document 1, the audio data and the audio control information are configured in separate packets. By decoding the header information from the packet, a packet having audio control information and a packet having audio data can be identified. Then, the audio control information extracted from the packet having audio control information is stored, and the audio information is restored from the packet having audio data using the stored control information and output.

This makes it possible to handle more audio formats and the number of audio channels. However, the audio packet decoder described in Patent Document 1 cannot solve the above-described problem of taking time.

The present invention has been made in view of the above-described problems, and an object of the present invention is to transmit a broadcast signal that can more quickly determine whether audio can be reproduced from audio data received by a receiver than before. It is to provide a device, a broadcast signal receiving device, and the like.

A broadcast signal transmission apparatus according to an aspect of the present invention is a broadcast signal transmission apparatus that transmits a digital broadcast signal, and in order to solve the above-described problem, a plurality of MMT protocol packets in which content is converted; A packet generation unit that generates, as the digital broadcast signal, an MMT protocol packet including control information for reconfiguring the content from the packet, and an attribute acquisition unit that acquires attribute information related to the audio component of the content. And the control information includes the attribute information.

A broadcast signal transmitting apparatus according to another aspect of the present invention is a broadcast signal receiving apparatus that receives a plurality of MMT protocol packets as a digital broadcast signal, and in order to solve the above problem, A control information acquisition unit that selects a packet including control information from among the control information and acquires the control information, and a reconfiguration that reconfigures content from the plurality of packets based on the control information acquired by the control information acquisition unit And the control information includes attribute information relating to the audio component of the content, and the audio component of the content is reproduced by the own device based on the attribute information extracted from the control information. It is further characterized by further comprising a determination unit for determining whether it is possible.

According to one aspect of the present invention, there is an effect that it is possible to determine whether or not sound can be reproduced from sound data received by the receiver more quickly than in the past.

It is a block diagram which shows an example of the principal part structure of the transmitter and receiver which are contained in the broadcast signal transmission system which concerns on Embodiment 1 of this invention. It is a figure which shows an example of MPT containing the audio | voice attribute information transmitted / received by the said broadcast signal transmission system. It is a figure which shows the specific example of the audio | voice attribute information stored in said MPT in a table format. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the said receiver. It is a block diagram which shows an example of the principal part structure of the broadcast signal transmission system which concerns on Embodiment 2 of this invention. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the receiver contained in the said broadcast signal transmission system. It is a block diagram which shows an example of the principal part structure of the receiver contained in the broadcast signal transmission system which concerns on Embodiment 3 of this invention. It is a block diagram which shows an example of a principal part structure of the receiver contained in the broadcast signal transmission system which concerns on Embodiment 4 of this invention. It is a figure which shows an example of the display screen in the said receiver. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the said receiver. It is a block diagram which shows an example of the principal part structure of the transmitter and receiver which are contained in the broadcast signal transmission system which concerns on Embodiment 7 of this invention. It is a figure which shows an example of PMT containing the audio | voice attribute information transmitted / received by the said broadcast signal transmission system. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the said receiver. It is a block diagram which shows an example of a principal part structure of the broadcast signal transmission system which concerns on Embodiment 8 of this invention. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the receiver contained in the said broadcast signal transmission system. It is a block diagram which shows an example of a principal part structure of the receiver contained in the broadcast signal transmission system which concerns on Embodiment 9 of this invention. It is a block diagram which shows an example of the principal part structure of the receiver contained in the broadcast signal transmission system which concerns on Embodiment 10 of this invention. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the said receiver. It is a block diagram which shows an example of the principal part structure of the transmitter and receiver which are contained in the broadcast signal transmission system which concerns on Embodiment 13 of this invention. (A) is a figure which shows an example of EIT containing audio | voice attribute information transmitted / received by the said broadcast signal transmission system, (b) is other than the descriptor containing the audio | voice attribute information in EIT shown to (a). It is a figure which shows an example. It is a figure which shows the specific example of the audio | voice attribute information stored in said EIT in a table format. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the said receiver. It is a block diagram which shows an example of a principal part structure of the broadcast signal transmission system which concerns on Embodiment 14 of this invention. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the receiver contained in the said broadcast signal transmission system. It is a block diagram which shows an example of a principal part structure of the receiver contained in the broadcast signal transmission system which concerns on Embodiment 15 of this invention. It is a block diagram which shows an example of a principal part structure of the receiver contained in the broadcast signal transmission system which concerns on Embodiment 16 of this invention. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the said receiver. It is a figure which shows an example of the electronic program guide which the said receiver produces | generates with reference to EIT containing audio | voice attribute information. It is a block diagram which shows an example of a principal part structure of the transmitter contained in the broadcast signal transmission system concerning Embodiment 19 of this invention. It is a block diagram which shows an example of a principal part structure of the receiver contained in the said broadcast signal transmission system. It is a figure which shows the activation example of AIT transmitted with a broadcast signal, and the application according to this AIT. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the receiver contained in the said broadcast signal transmission system. It is a figure which shows the example of a change of the attribute of audio | voice according to timing designation | designated information and this timing designation | designated information. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the receiver concerning Embodiment 20 of this invention. It is a block diagram which shows an example of a principal part structure of the broadcast signal transmission system which concerns on Embodiment 21 of this invention. It is a flowchart which shows an example of the process regarding the audio | voice attribute information performed with the receiver contained in the said broadcast signal transmission system. It is a figure which shows schematic structure of the broadcast signal transmission system which concerns on Embodiment 23 of this invention. It is a block diagram which shows an example of a principal part structure of the receiver and terminal device which are contained in the said broadcast signal transmission system. It is a block diagram which shows an example of a principal part structure of the receiver contained in the broadcast signal transmission system which concerns on Embodiment 22 of this invention.

[Embodiment 1]
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to FIGS. First, the configuration of the broadcast signal transmission system according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram illustrating an example of a main configuration of a transmitter (broadcast signal transmitting device) 1 and a receiver (broadcast signal receiving device) 2 included in a broadcast signal transmission system 5.

The broadcast signal transmission system 5 is a system for transmitting a video signal, an audio signal, etc. (hereinafter abbreviated as “video signal etc.”) from the transmitter 1 to the receiver 2. The broadcast signal transmission system 5 can transmit audio signals in various formats. In the next-generation 4K / 8K broadcasting, it is considered that signals are transmitted by the MMT (MPEG Media Transport) system. Therefore, in the present embodiment, an example in which a video signal or the like is transmitted using the MMT method will be described.

Transmitter 1 transmits content in the form of a video signal or the like. More specifically, the transmitter 1 transmits each packet (MMTP (MMT Protocol) packet) that constitutes content on a broadcast path (broadcast transmission path). One receiver 2 has a function for receiving this content (content distributed via a broadcast route), and also has a function for receiving content distributed via a communication route via a communication network such as the Internet. . And the receiver 2 can reproduce | regenerate combining each content received via these two paths | routes. In the figure, only one receiver 2 is shown, but the transmitter 1 broadcasts content to a plurality of receivers 2.

[Configuration of transmitter]
The transmitter 1 includes an audio encoder 10, a video encoder 11, a multiplexing unit (packet generation unit) 12, an encryption unit 13, a transmission unit 14, and a control unit 15, as illustrated. The control unit 15 includes an encoding control unit 16, an audio attribute acquisition unit (attribute acquisition unit) 17, and a control information generation unit (packet generation unit) 18.

The audio encoder 10 encodes (encodes) the audio (sound) stream of the content transmitted by the transmitter 1 and outputs it to the multiplexing unit 12. Similarly, the video encoder 11 encodes (encodes) a video (video) stream of content transmitted by the transmitter 1 and outputs the encoded video (video) stream to the multiplexing unit 12.

The multiplexing unit 12 multiplexes the audio stream output from the audio encoder 10, the video stream output from the video encoder 11, and the control information output from the control unit 15, converts it into an MMTP packet, and outputs the MMTP packet to the encryption unit 13. .

The encryption unit 13 encrypts the MMTP packet output from the multiplexing unit 12 and outputs the encrypted MMTP packet to the transmission unit 14. Then, the transmission unit 14 transmits the encrypted MMTP packet output from the encryption unit 13 to the receiver 2 through the broadcast path in the form of a digital broadcast signal.

The control unit 15 controls each unit included in the transmitter 1. Specifically, the encoding control unit 16 included in the control unit 15 controls the audio encoder 10 and the video encoder 11 to perform encoding.

The audio attribute acquisition unit 17 acquires audio attribute information that is attribute information regarding the audio of the content transmitted by the transmitter 1, and outputs the acquired audio attribute information to the control information generation unit 18. Here, “content transmitted by the transmitter 1” includes content that the transmitter 1 plans to transmit, that is, content that is scheduled to be broadcast.

Examples of audio attribute information include the audio format, the number of audio channels, the number of subwoofer (SW) channels, the form and channel of simulcast, the sampling frequency, the number of quantization bits, and the like. Among these, the audio format, the number of audio channels, the number of subwoofer (SW) channels, the sampling frequency, and the number of quantization bits can be acquired from the encoding control unit 16. On the other hand, the form and channel of the simulcast can be acquired from an external server (not shown) that provides detailed information of the content (program) transmitted (broadcasted) by the transmitter 1. Details of the audio attribute information will be described later.

The control information generation unit 18 generates control information for the receiver 2 to reconfigure the content transmitted by the transmitter 1. This control information is called MMT-SI (Service Information) in MMT, and includes various information related to content, but here, information related to the configuration of content (package) is described in MMT-SI. The description will focus on the generation of MPT (MMT Package Table).

As described above, in the transmitter 1, the voice attribute acquisition unit 17 executes the process of acquiring the voice attribute information (voice attribute acquisition step). On the other hand, the control information generation unit 18 refers to the conversion from the audio stream and the video stream to the MMTP packet in the multiplexing unit 12 and executes processing for generating control information (MPT) including the audio attribute information. . Therefore, in the receiver 2 that has received this MPT, the content received together with the MPT is subjected to appropriate processing according to the audio attribute information and output as audio, or it indicates that the content does not correspond to the audio data of the content. It is possible to notify a caution.

The encoding control unit 16 acquires the audio attribute information of each content for each content transmitted by the transmitter 1, and the control information generation unit 18 generates an MPT including this audio attribute information. Thus, by generating MPT including different audio attribute information for each content, it is possible to always reproduce the content by an optimal process.

[Configuration of receiver]
As shown, the receiver 2 includes a tuner 20, a communication I / F 21, a decoding unit 22, a demultiplexing unit (reconstruction unit) 23, an audio decoder 24, a video decoder 25, a display control unit 27, a display 28, and a control. Unit 29, audio output control unit 30, and speaker 31. The control unit 29 includes a decoding control unit 40, a demultiplexing control unit (reconstruction unit) 41, and a control information acquisition unit (control information acquisition unit, determination unit) 42.

The tuner 20 receives content and the like transmitted as a digital broadcast signal through the broadcast path and outputs them to the decoding unit 22. On the other hand, the communication I / F 21 receives the content transmitted through the communication path and outputs it to the decoding unit 22.

When the content received via the tuner 20 and the communication I / F 21 is encrypted, the decryption unit 22 decrypts the content and outputs it to the demultiplexing unit 23.

The demultiplexer 23 demultiplexes the data output from the decryptor 22 (encrypted but decrypted). Then, each component (component) of the content obtained by demultiplexing is processed according to the type of the component. Specifically, in the demultiplexer 23, the audio component is output to the audio decoder 24, the video component is output to the video decoder 25, and the control information is output to the control information acquisition unit 42.

The audio decoder 24 decodes the audio component output from the demultiplexer 23 and outputs audio data. Similarly, the video decoder 25 decodes the video component output from the demultiplexer 23 and outputs video data.

The display control unit 27 performs control to display the video data on the display 28. The display 28 displays video data according to the control of the display control unit 27. On the other hand, the audio output control unit 30 performs control to output audio data from the speaker 31. The speaker 31 outputs audio data as audio in accordance with the control of the audio output control unit 30. That is, the receiver 2 is a television receiver having a function for receiving broadcast content and a function for reproducing (displaying and outputting audio). The display 28 and the speaker 31 may be external devices attached to the receiver 2.

The control unit 29 controls each unit included in the receiver 2 according to the received control information. Specifically, the decryption control unit 40 controls the decryption unit 22 to decrypt the content. In addition, the demultiplexing control unit 41 controls the demultiplexing unit 23 to perform demultiplexing of content.

This point will be explained in more detail. First, the demultiplexer 23 selects an MMTP packet including control information (MPT), acquires the control information, and outputs the acquired control information to the control information acquisition unit 42. The control information acquisition unit 42 transfers the acquired control information to the demultiplexing control unit 41. The demultiplexing control unit 41 can specify the MMTP packet including the audio component of the content and the MMTP packet including the video component of the content by referring to the control information from the control information acquisition unit 42. .

Then, the demultiplexing control unit 41 controls the demultiplexing unit 23 to select the MMTP packet including the audio component, and output the audio component to the audio decoder 24, and at the same time, the MMTP including the video component. A packet is selected and the video component is output to the video decoder 25. As a result, the MMTP packet is demultiplexed into the control information, the audio component of the content, and the video component of the content.

In the present embodiment, when the acquired control information includes audio attribute information, the control information acquisition unit 42 determines whether or not audio can be reproduced by the receiver 2 from the audio component of the content. Since this determination can be performed before the audio decoder 24 decodes the audio component, it can be performed more quickly than in the past.

[Example of MPT including voice attribute information]
Next, an example of MPT including audio attribute information will be described with reference to FIG. FIG. 2 is a diagram illustrating an example of MPT including audio attribute information. The illustrated MPT includes a descriptor D1 (version) indicating the version of the MPT, a descriptor D2 (MMT_package_id_byte) indicating the package ID of the MMT, and a descriptor D3 (MPT_descriptors_byte) including audio attribute information. )It is included.

In the descriptor D3, a predetermined tag descriptor_tag indicating that the descriptor (descriptor) is a descriptor related to the audio attribute information, a descriptor_length indicating the length of the descriptor, and a data body of the audio attribute information Data () is described. Note that the value of descriptor_tag only needs to be able to specify that the description about the audio attribute information is included in the descriptor D3. For example, in ARIB STD-B21 that defines the standard for digital broadcasting, it indicates other descriptors. An unused value of “0xF8” may be used.

Here, generally, in television broadcasting, video and audio with different sources are transmitted continuously, and there is a possibility that audio of such different sources has different audio attributes. Therefore, in order to deal with such a case, when the source changes, the control information generation unit 18 updates the audio attribute information in the MPT and also updates the MPT version information (value of the descriptor D1). To do. In the receiver 2, the control information acquisition unit 42 checks the audio attribute information every time the MPT version is updated, and if there is an update, transmits the new audio attribute information to the audio decoder 24. As a result, it is possible to perform appropriate processing according to a change in sound.

In the example of FIG. 2, descriptor_length is a value of “Ox20” and is 32 bits. In data (), as the audio attribute information, the number of audio channels (CH1), the number of subwoofer (SW) channels (CH2), the audio format (Format), the audio sampling frequency (Sampl_freq), and the audio quantization The number of bits (Bit_rate), the form of simulcast (Simul) and the channel (Simul_CH) are encoded and stored in order. FIG. 3 is a diagram showing a specific example of the audio attribute information stored in the MPT shown in FIG. 2 in a table format.

The broadcast signal transmission system 5 of the present embodiment corresponds to an ultra-high-detail television broadcasting system. Therefore, in the example of FIG. 3, the audio format (Format) includes PCM (Pulse Code Modulation), MPEG2 (Moving Picture Experts Group Group 2) -AAC (Advanced Audio Coding), MPEG4-AAC, MPEG2-AC3 (Audio Code number 3), etc., and each is assigned to a 4-bit code. Also, in order to support 22.2 ch three-dimensional sound, the number of audio channels (CH1) is in the range of 0 to 24, and each is assigned to a 5-bit code, and the number of SW channels (CH2) Are in the range of 0-2, each assigned to a 2-bit code. Further, there are 16, 22.05, 24, 32, 44.1, 48, 96, 192, and the like as audio sampling frequencies (kHz), and each is assigned to a 4-bit code. In addition, there are 8, 10, 16, 24, 32, and the like as quantization bit numbers (bits) of speech, and each is assigned to a 3-bit code.

By the way, simultaneous broadcasting means that one broadcasting station broadcasts the same program in different channels (frequency bands), different broadcasting systems, or different broadcasting media in the same time zone. In the example of FIG. 3, the forms of simulcast (simul) include terrestrial digital broadcast, BS (Broadcasting （Satellite) digital broadcast, CS (Communications インターネット Satellite) digital broadcast, the Internet, etc., each assigned to a 4-bit code. ing. The simulcast channel (Simul_CH) includes 1ch to 1000ch, and each is assigned to a 12-bit code. Note that one-segment broadcasting, radio broadcasting, or the like may be used as simultaneous broadcasting.

[Receiver processing for audio attribute information]
Next, the processing of the receiver 2 regarding the audio attribute information will be described with reference to FIG. FIG. 4 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42 of the receiver 2 regarding the audio attribute information.

First, the control information acquisition unit 42 extracts MPT from the control information output by the demultiplexing unit 23, and acquires voice attribute information from the extracted MPT (S1). Specifically, the control information acquisition unit 42 determines a descriptor (descriptor) whose descriptor_tag value matches the tag value (0xF8 in the example of FIG. 2) assigned in advance to the audio attribute information from the extracted MPT. Extraction is performed, the extracted descriptor is analyzed, and voice attribute information included in the descriptor is acquired.

Next, the control information acquisition unit 42 extracts an audio format from the acquired audio attribute information, and determines whether or not the extracted audio format can be decoded by the audio decoder 24 of the receiver 2 ( S2) If decoding is possible (YES in S2), the number of audio channels is extracted from the audio attribute information, and whether the extracted audio channel number is decodable by the audio decoder 24 or not. Judgment is made (S3). If decoding is possible (YES in S3), the control information acquisition unit 42 transmits the audio attribute information to the audio decoder 24 and decodes the audio data based on the audio attribute information. (S4), and the process is terminated.

On the other hand, if the audio format cannot be decoded by the audio decoder 24 (NO in S2), or if the number of audio channels cannot be decoded by the audio decoder 24 (NO in S3), the control information The acquisition unit 42 acquires the form and channel of simulcast from the acquired audio attribute information (S5), and determines whether or not the simulcast exists (S6). If the simulcast is present (YES in S6), the control information acquisition unit 42 controls the tuner 20 to switch to the simulcast and receive (S7). Then, it returns to step S1 and repeats the said operation | movement.

On the other hand, when the simulcast does not exist (NO in S6), the control information acquisition unit 42 instructs the display control unit 27 to display a caution indicating that the audio data is not supported on the display 28. (S8), the process ends.

In the flowchart shown in FIG. 4, it is determined whether or not decoding is possible for the audio format and the number of audio channels in the audio attribute information. However, the number of SW channels, the sampling frequency, the number of quantization bits, etc. It may be determined whether other information necessary for reproduction of each can be decoded. In this case, steps S2 and S3 shown in FIG. 4 may be changed to the following processing.

That is, the control information acquisition unit 42 extracts various information necessary for audio reproduction from the acquired audio attribute information, and all of the extracted information can be decoded by the audio decoder 24 of the receiver 2. Whether or not (S2 ′). If it can be decoded (YES in S2 '), the process proceeds to step S4. On the other hand, if it cannot be decoded (NO in S2 '), the process proceeds to step S5.

[Modification]
Note that the audio attribute information shown in FIG. 3 may include an audio format in simulcast, the number of audio channels, and the number of subwoofer (SW) channels. In this case, after switching to simulcast in step S7 of FIG. 4, steps S1 to S3 are omitted and step S4 is executed, that is, audio data is decoded based on the audio attribute information of the simulcast. Thus, the audio decoder 24 may be instructed.

[Embodiment 2]
Embodiment 2 of the present invention will be described below with reference to FIGS. 5 and 6. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

Incidentally, even audio data that cannot be handled by the receiver 2 may be able to deal with the audio data by an external audio output device connected to the receiver 2. Therefore, in the present embodiment, when the receiver 2 determines that the above case is satisfied based on the audio attribute information included in the control information, the audio data is not decoded and the audio data is converted into the audio data as it is. It is transferred to the output device (sound reproduction device) 6. Thereby, even if the sound data cannot be reproduced by the own device, it can be quickly reproduced and output by the external sound output device 6.

FIG. 5 is a block diagram showing an example of a main configuration of the broadcast signal transmission system 5 according to the present embodiment. The broadcast signal transmission system 5 according to the present embodiment is different from the broadcast signal transmission system 5 shown in FIG. 1 in that an audio output device 6 that is communicably connected to the receiver 2 is added. Further, in the receiver 2 shown in FIG. 5, a switching unit (transfer unit) 32 and a voice output communication I / F (external attribute acquisition unit, transfer unit) 33 are added compared to the receiver 2 shown in FIG. And the control unit 29 is different from the control information acquisition unit 42 in that a control information acquisition unit (control information acquisition unit, determination unit, external attribute acquisition unit, transfer unit) 42a is provided, Other configurations are the same.

The audio output device 6 outputs audio based on audio data received from the outside. The audio output device 6 includes functional blocks similar to the audio decoder 24, the audio output control unit 30, the speaker 31, and the audio output communication I / F 33 in the receiver 2.

The switching unit 32 is provided between the demultiplexing unit 23 and the audio decoder 24, and the output destination of the audio component from the demultiplexing unit 23 is set to one of the audio decoder 24 and the audio output communication I / F 33. Switching is performed based on an instruction from the control unit 29.

The audio output communication I / F 33 is for performing data communication with the audio output device 6. In the present embodiment, the audio output device 6 and the audio output communication I / F 33 output digital audio signals as they are, for example, SPDIF (Sony Philips Digital InterFace), ARC (Audio Return Channel), and the like. The bit stream output can be handled. The communication between the audio output device 6 and the audio output communication I / F 33 may be wired communication or wireless communication.

The control information acquisition unit 42a has the following functions added to the control information acquisition unit 42 shown in FIG. 1, and other functions are the same. That is, the control information acquisition unit 42a acquires the audio attribute information (the number of audio channels, the number of SW channels, the audio format, etc.) that can be supported by the audio output device 6 via the audio output communication I / F 33. Have

Further, the control information acquisition unit 42a instructs the switching unit 32 to switch based on the voice attribute information extracted from the control information from the demultiplexing unit 23 and the voice attribute information from the voice output communication I / F 33. It has a function. Specifically, the control information acquisition unit 42a, when the audio data from the demultiplexing unit 23 is not compatible with the audio decoder 24 of its own, but is compatible with the audio output device 6, The switching unit 32 is instructed to switch so that the audio data is output to the audio output communication I / F 33. As a result, the audio data is output to the audio output device 6 as it is via the audio output communication I / F 33. Note that the control information acquisition unit 42 a instructs the switching unit 32 to output the audio data to the audio decoder 24 in cases other than the above case.

Next, in the present embodiment, the processing of the receiver 2 regarding the audio attribute information will be described based on FIG. FIG. 6 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42a of the receiver 2 regarding the audio attribute information. The processing shown in FIG. 6 is the same as the processing shown in FIG. 4 except that steps S11 and S12 are added.

In step S11, if the audio format cannot be decoded by the audio decoder 24 (NO in S2), or if the number of audio channels cannot be decoded by the audio decoder 24 (NO in S3), The control information acquisition unit 42a refers to the audio attribute information from the audio output device 6 via the audio output communication I / F 33, and can the audio output device 6 support the audio format and the number of audio channels? Judging. If the audio output device 6 cannot handle the audio format and the number of audio channels (NO in S11), the process proceeds to step S5.

On the other hand, when the audio output device 6 can handle the audio format and the number of audio channels (YES in S11), the control information acquisition unit 42a instructs the switching unit 32 to perform demultiplexing. The audio data from the unit 23 is transferred to the external audio output device 6 via the audio output communication I / F 33 in the form as it is (S12), and the processing is terminated.

Note that, also in the flowchart shown in FIG. 6, the processing in steps S2 and S3 may be changed to the processing in step S2 ′ as described above. In this case, if decoding is impossible (NO in S2 '), the process may proceed to step S11 instead of step S5.

[Embodiment 3]
Embodiment 3 of the present invention will be described below with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the second embodiment, the audio is output from either the speaker 31 of the receiver 2 or the audio output device 6 connected to the receiver 2, but the audio is output from both the speaker 31 and the audio output device 6. May be output.

FIG. 7 is a block diagram illustrating an example of a main configuration of the receiver 2 of the broadcast signal transmission system 5 according to the present embodiment. Compared with the broadcast signal transmission system 5 shown in FIG. 5, the broadcast signal transmission system 5 according to the present embodiment includes two

demultiplexing units

23 a and 23 b, and a selector 35 is provided in place of the switching unit 32. Unlike the provided points, the other configurations are the same.

The illustrated receiver 2 includes two tuners (not shown) and two decoding units (not shown). The receiver 2 receives content transmitted as a digital broadcast signal by one tuner, decodes the content by one decoding unit, and outputs it to the demultiplexing unit 23a. Further, the receiver 2 receives the content of the simulcast of the content received by one tuner by the other tuner, decodes the content by the other decoding unit, and outputs it to the demultiplexing unit 23b. The functions of the

demultiplexing units

23a and 23b are the same as those of the demultiplexing unit 23 of the receiver 2 shown in FIG.

The selector 35 selects either the audio component output from the demultiplexing unit 23a or the audio component output from the demultiplexing unit 23b as an audio component to be output to the audio decoder 24 and the audio output communication I / F 33. In addition, switching is performed based on an instruction from the control unit 29. That is, in this embodiment, the audio component is output to both the audio decoder 24 and the audio output communication I / F 33.

The control information acquisition unit 42a functions to instruct the selector 35 to switch based on the audio attribute information extracted from the control information from the

demultiplexing units

23a and 23b and the audio attribute information from the audio output communication I / F 33. Have

The specific switching instruction given from the control information acquisition unit 42a to the selector 35 is as follows.

(Case 1)
When the audio data from the demultiplexing unit 23a can be handled by the audio decoder 24 and the audio output device 6, the audio data is output to the audio decoder 24 and the audio output communication I / F 33 to the selector 35. Instruct switching.

(Case 2)
When the audio data from the demultiplexer 23a cannot be handled by the audio decoder 24 and can be handled by the audio output device 6, the audio data from the demultiplexer 23b is sent to the audio decoder 24. The selector 35 is instructed to switch so as to output the audio data from the demultiplexer 23a to the audio output communication I / F 33.

(Case 3)
When the audio data from the demultiplexing unit 23 a can be handled by the audio decoder 24 and cannot be handled by the audio output device 6, the audio data from the demultiplexing unit 23 a is sent to the audio decoder 24. The selector 35 is instructed to switch so as to output the audio data from the demultiplexer 23b to the audio output communication I / F 33.

Thereby, the receiver 2 can output sound from both the speaker 31 and the sound output device 6.

In the present embodiment, since the control information includes the audio attribute information of the content simultaneous broadcasting, the audio attribute is used by using the control information from either the demultiplexing unit 23a or the demultiplexing unit 23b. It is good also as a structure which extracts information.

[Embodiment 4]
The following describes Embodiment 4 of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

Incidentally, the content may include a plurality of audio components having different audio channel numbers and audio formats. As an example of such an audio component, the number of audio channels is 22.1 ch, the audio format is MPEG2-AC3, the number of audio channels is 5.1 ch, and the audio format is LPCM (Linear PCM). ) Is a voice component.

On the other hand, some receivers 2 can handle a plurality of sets of audio formats and the number of channels. Therefore, in the present embodiment, information on what can be handled by the audio decoder 24 among the plurality of audio components included in the content is displayed on the display 28, and the audio decoder 24 decodes the audio component selected by the user. It is carried out. Thereby, a sound can be reproduced from a sound component desired by the user, and as a result, convenience for the user is improved.

FIG. 8 is a block diagram illustrating an example of a main configuration of the receiver 2 of the broadcast signal transmission system 5 according to the present embodiment. The receiver 2 of the present embodiment is different from the receiver 2 shown in FIG. 1 in that a superimposition unit 26 is added between the video decoder 25 and the display control unit 27 and the control unit 29 acquires control information. Instead of the unit 42, a control information acquisition unit (control information acquisition unit, determination unit, selection unit) 42b is provided, and other configurations are the same.

The superimposing unit 26 superimposes other image data on the video data from the video decoder 25. The superimposed video data is output to the display control unit 27.

The control information acquisition unit 42b has the following functions added to the control information acquisition unit 42 shown in FIG. 1, and other functions are the same. That is, the control information acquisition unit 42b determines whether or not the audio decoder 24 can decode a plurality of audio components included in a certain content from the audio attribute information extracted from the control information from the demultiplexing unit 23. It has the function to do. In addition, the control information acquisition unit 42 b has a function of creating decoding selection image data for displaying the number of audio channels and audio format related to the audio component determined to be decodable and outputting the image data to the superimposing unit 26.

FIG. 9 is a diagram showing an example of a screen on which the decoding selection image data is displayed on the display 28. In the illustrated display screen, the number of audio channels related to a decodable audio component and a set of audio formats are displayed at the bottom, and various other information such as video of the video component is displayed in the remaining area. When the user selects one of the sets displayed at the bottom, the control information acquisition unit 42b instructs the audio decoder 24 to decode the audio components of the selected set, and only the video of the video component is displayed. Return to the normal display screen.

Next, in the present embodiment, the processing of the receiver 2 regarding the voice attribute information will be described based on FIG. FIG. 10 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42b of the receiver 2 regarding the audio attribute information. The processing shown in FIG. 10 is the same as the processing shown in FIG. 4 except that steps S21 to S23 are added.

In step S21, if the audio format can be decoded by the audio decoder 24 (YES in S2) and the number of audio channels can be decoded by the audio decoder 24 (YES in S3), control is performed. The information acquisition unit 42b determines whether there are a plurality of audio components that can be decoded. If there is one audio component that can be decoded (NO in S21), the process proceeds to step S4.

On the other hand, when there are a plurality of audio components that can be decoded (YES in S21), the control information acquisition unit 42b outputs the decoding selection image data to the superimposing unit 26, so that the number of audio channels of the audio components is increased. And the audio format are displayed for each audio component (S22). Then, the control information acquisition unit 42b instructs the audio decoder 24 to decode the audio component selected by the user from the plurality of audio components based on the audio attribute information (S23), and ends the processing. To do.

In the flowchart shown in FIG. 10 as well, the processes in steps S2 and S3 may be changed to the process in step S2 'as described above. In this case, if decoding is possible (YES in S2 '), the process may proceed to step S21 instead of step S4.

[Embodiment 5: Modification]
Note that this embodiment relates to a case where there are a plurality of audio components that can be decoded. On the other hand, some audio decoders 24 can down-convert 22.2 ch audio components into, for example, 5.1 ch, 2 ch audio data.

Therefore, the present embodiment can also be applied when there are audio components that the audio decoder 24 can down-convert. In this case, the control information acquisition unit 42b displays the number of audio channels (for example, 22.2ch, 5.1ch, 2ch, etc.) that can be selected by the user on the lower part of the display screen shown in FIG. May be output to the superimposing unit 26 and the audio decoder 24 may be instructed to output audio data of the number of audio channels selected by the user.

In addition, the transmitter 1 of the above embodiment has both a function as a control information generation device that generates control information for reproducing content and a function as a transmission device that transmits a digital broadcast signal. However, a function similar to that of the transmitter 1 can be realized by a combination of a control information generating device and a transmitting device that are independent from each other.

[Embodiment 6: Implementation Example by Software]
The control blocks (especially the control unit 15 and the control unit 29) of the transmitter 1 and the receiver 2 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or a CPU (Central It may be realized by software using a Processing Unit.

In the latter case, the transmitter 1 and the receiver 2 are a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read that records the above-described program and various data so that the computer (or CPU) can read them. Only Memory) or a storage device (these are referred to as “recording media”), RAM (Random Access Memory) for expanding the program, and the like. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
A broadcast signal transmission apparatus (transmitter 1) according to aspect 1 of the present invention is a broadcast signal transmission apparatus that transmits a digital broadcast signal, and includes a plurality of MMT protocol packets obtained by converting content, and the above-described plurality of packets. A packet generator (multiplexer 12, control information generator 18) that generates, as the digital broadcast signal, an MMT protocol packet including control information (MPT) for reconfiguring content, and an audio component of the content An attribute acquisition unit (speech attribute acquisition unit 17) for acquiring attribute information on the control information, and the control information includes the attribute information.

According to the above configuration, the control information for reconfiguring the content includes attribute information (audio attribute information) regarding the audio component of the content. As a result, a receiving device that receives a plurality of MMT protocol packets obtained by converting the content and an MMT protocol packet including the control information as a digital broadcast signal reconfigures the content based on the control information. The audio attribute information of the content has already been acquired. Therefore, before the reconstructed content is reproduced, it can be determined whether the audio component of the content can be reproduced by the own device, and as a result, the determination can be performed more quickly than before.

A broadcast signal receiving apparatus (receiver 2) according to aspect 2 of the present invention is a broadcast signal receiving apparatus that receives a plurality of MMT protocol packets as a digital broadcast signal, and includes control information (from among the plurality of packets). A control information acquisition unit (42) that selects a packet including MPT) and acquires the control information, and a reconfiguration that reconfigures content from the plurality of packets based on the control information acquired by the control information acquisition unit The control information includes attribute information regarding the audio component of the content, and based on the attribute information extracted from the control information, It further includes a determination unit (control information acquisition unit 42) that determines whether the sound can be reproduced by the own device.

According to the above configuration, a packet including control information is selected from a plurality of packets of the MMT protocol received as a digital broadcast signal, and the control information is acquired. Based on the acquired control information, the plurality of Reconstruct the content from the packet. At this time, attribute information (audio attribute information) regarding the audio component of the content included in the control information has already been acquired. Therefore, before reproducing the reconstructed content, it is possible to determine whether or not the audio can be reproduced from the audio component of the content, and as a result, the determination can be performed more quickly than before. .

The broadcast signal receiving device according to aspect 3 of the present invention is the above-described aspect 2, wherein the attribute information of the audio component capable of reproducing audio by the audio reproduction device from the external audio reproduction device that is communicably connected to the own device. An external attribute acquisition unit that acquires audio, and whether the determination unit can reproduce audio from the audio component of the content on the audio reproduction device based on the attribute information acquired by the external attribute acquisition unit. And a transfer unit that transfers the audio component reconfigured by the reconfiguration unit to the external audio reproduction device when the audio reproduction device can reproduce the audio component as a result of the determination. It may be.

According to the above configuration, before reproducing the reconstructed content, it is determined that the audio can be reproduced from the audio component of the content by an external audio reproduction device, and the audio component of the reconstructed content is It can be transferred to the audio playback device. As a result, even if the audio component cannot be reproduced by the own device, it can be quickly reproduced and output by an external audio reproduction device.

The broadcast signal receiving apparatus according to aspect 4 of the present invention is the broadcast signal receiving apparatus according to

aspect

2 or 3, wherein the content includes a plurality of audio components having the same content and different attribute information. When a sound can be reproduced from the plurality of sound components by the own device, the sound device may further include a selection unit (control information acquisition unit 42b) that allows the user to select one of the sound components. According to said structure, an audio | voice can be reproduced | regenerated from the audio | voice component which a user desires, As a result, a user's convenience improves.

A television receiver according to aspect 5 of the present invention includes the receiving device according to aspects 2 to 4. Therefore, the same operational effects as those of the broadcast signal receiving apparatus according to aspects 2 to 4 are obtained.

A broadcast signal transmission system (5) according to aspect 6 of the present invention includes the broadcast signal transmitting apparatus according to aspect 1 and the broadcast signal receiving apparatus according to aspects 2 to 4. Therefore, the same effects as the broadcast signal transmitting apparatus according to aspect 1 and the broadcast signal receiving apparatuses according to aspects 2 to 4 are achieved.

Note that the attribute information preferably includes information necessary for reproducing sound from the sound component. Examples of the information include the audio format of the audio, the number of channels, the sampling frequency, the number of quantization bits, and the like.

In addition, the attribute information may include information for specifying a simulcast of the content. In this case, before playing the reconstructed content, the receiving device determines that the audio of the content cannot be played back by the device, refers to the attribute information, and receives the broadcast signal to be received. It is possible to switch to a content simultaneous broadcast signal. As a result, it is possible to quickly switch to the simulcast.

The broadcast signal transmitting apparatus and the broadcast signal receiving apparatus according to each aspect of the present invention may be realized by a computer. In this case, the computer operates as each unit included in the broadcast signal transmitting apparatus and the broadcast signal receiving apparatus. Thus, a control program for realizing the broadcast signal transmitting apparatus and the broadcast signal receiving apparatus on a computer and a computer-readable recording medium on which the program is recorded also fall within the scope of the present invention.
[Description I of related embodiments]
Embodiments 7 to 12 will be described below.

[Embodiment 7]
Hereinafter, Embodiment 7 of the present invention will be described in detail with reference to FIGS. First, the configuration of the broadcast signal transmission system according to the present embodiment will be described with reference to FIG. FIG. 11 is a block diagram illustrating an example of a main configuration of a transmitter (broadcast signal transmitter) 1a and a receiver (broadcast signal receiver) 2a included in the broadcast signal transmission system 5a.

The broadcast signal transmission system 5a is a system for transmitting a video signal, an audio signal, etc. (hereinafter abbreviated as “video signal etc.”) from the transmitter 1a to the receiver 2a. The broadcast signal transmission system 5a can transmit audio signals in various formats. In the current digital broadcasting, signals are transmitted in a TS (Transport Stream) format of MPEG-2 (Moving Picture Experts Group Phase 2) system. Therefore, in this embodiment, an example in which a video signal or the like is transmitted in the TS format will be described.

The transmitter 1a transmits content in the form of a video signal or the like. More specifically, the transmitter 1a transmits each packet (TS packet) constituting the content through a broadcast path (broadcast transmission path). One receiver 2a has a function of receiving this content (content distributed through a broadcast route), and also has a function of receiving content distributed through a communication route via a communication network such as the Internet, for example. . And the receiver 2a can reproduce | regenerate combining each content received via these two paths | routes. In the figure, only one receiver 2 is shown, but the transmitter 1a broadcasts content to a plurality of receivers 2a.

[Configuration of transmitter]
As illustrated, the transmitter 1a includes an audio encoder 10a, a video encoder 11a, a multiplexing unit (packet generation unit) 12a, an encryption unit 13a, a transmission unit 14a, and a control unit 15a. The control unit 15a includes an encoding control unit 16a, an audio attribute acquisition unit (attribute acquisition unit) 17a, and a control information generation unit (packet generation unit) 18a.

The audio encoder 10 a encodes (encodes) an audio (sound) stream of content transmitted by the transmitter 1 a and outputs the encoded audio (sound) stream to the multiplexing unit 12. Similarly, the video encoder 11a encodes (encodes) a video (video) stream of content transmitted by the transmitter 1 and outputs the encoded video (video) stream to the multiplexing unit 12a.

The multiplexing unit 12a multiplexes the audio stream output from the audio encoder 10a, the video stream output from the video encoder 11a, and the control information output from the control unit 15a, converts the information into TS packets, and outputs the TS packet to the encryption unit 13a. .

The encryption unit 13a encrypts the TS packet output from the multiplexing unit 12a and outputs the encrypted TS packet to the transmission unit 14a. Then, the transmission unit 14a transmits the encrypted TS packet output from the encryption unit 13a to the receiver 2a through the broadcast path in the form of a digital broadcast signal.

The control unit 15a controls each unit included in the transmitter 1a. Specifically, the encoding control unit 16a included in the control unit 15a controls the audio encoder 10a and the video encoder 11a to perform encoding.

The audio attribute acquisition unit 17a acquires audio attribute information that is attribute information related to the audio of the content transmitted by the transmitter 1a, and outputs the acquired audio attribute information to the control information generation unit 18a. Here, the “content transmitted by the transmitter 1a” includes content that is scheduled to be transmitted by the transmitter 1a, that is, content that is scheduled to be broadcast.

Examples of audio attribute information include the audio format, the number of audio channels, the number of subwoofer (SW) channels, the form and channel of simulcast, the sampling rate, the number of quantization bits, and the like. Among these, the audio format, the number of audio channels, the number of subwoofer (SW) channels, the sampling rate, and the number of quantization bits can be acquired from the encoding control unit 16a. On the other hand, the form and channel of simulcast can be acquired from an external server (not shown) that provides detailed information on the content (program) transmitted (broadcast) by the transmitter 1a. Details of the audio attribute information will be described later.

The control information generation unit 18a generates control information for the receiver 2 to reconfigure the content transmitted by the transmitter 1a. This control information is called PSI / SI (Program Specific Information / Service Information) in the TS, and includes various information related to the content. Here, in the PSI / SI, information related to the content program is described. A description will be given focusing on the generation of the generated PMT (Program Map table).

Thus, in the transmitter 1a, the voice attribute acquisition unit 17a executes the process of acquiring the voice attribute information (voice attribute acquisition step). On the other hand, the control information generation unit 18a executes processing for generating control information (PMT) including the audio attribute information with reference to the conversion from the audio stream and the video stream to the TS packet in the multiplexing unit 12a. . Therefore, in the receiver 2a that has received this PMT, the content received together with the PMT is subjected to appropriate processing according to the audio attribute information and output as audio, or it indicates that the content does not correspond to the audio data of the content. It is possible to notify a caution.

Note that the encoding control unit 16a acquires the audio attribute information of each content for each content transmitted by the transmitter 1a, and the control information generation unit 18a generates a PMT including the audio attribute information. As described above, by generating a PMT including different audio attribute information for each content, it is possible to always reproduce the content by an optimal process.

[Configuration of receiver]
As illustrated, the receiver 2a includes a tuner 20a, a communication I / F 21a, a decoding unit 22a, a demultiplexing unit (reconstruction unit) 23a, an audio decoder 24a, a video decoder 25a, a display control unit 27a, a display 28a, and a control. Unit 29a, audio output control unit 30a, and speaker 31a. The control unit 29a includes a decoding control unit 40a, a demultiplexing control unit (reconstruction unit) 41a, and a control information acquisition unit (control information acquisition unit, determination unit) 42a.

The tuner 20a receives the content transmitted as a digital broadcast signal through the broadcast path and outputs it to the decoding unit 22a. On the other hand, the communication I / F 21a receives the content transmitted through the communication path and outputs it to the decryption unit 22a.

When the content received via the tuner 20a and the communication I / F 21a is encrypted, the decryption unit 22a decrypts the content and outputs it to the demultiplexing unit 23a.

The demultiplexing unit 23a demultiplexes the data output from the decryption unit 22a (encrypted but decrypted). Then, each component (component) of the content obtained by demultiplexing is processed according to the type of the component. Specifically, in the demultiplexing unit 23a, the audio component is output to the audio decoder 24a, the video component is output to the video decoder 25a, and the control information is output to the control information acquisition unit 42a.

The audio decoder 24a decodes the audio component output from the demultiplexing unit 23a and outputs audio data. Similarly, the video decoder 25a decodes the video component output from the demultiplexer 23a and outputs video data.

The display control unit 27a performs control to display the video data on the display 28a. The display 28a displays video data according to the control of the display control unit 27a. On the other hand, the audio output control unit 30a performs control to output audio data from the speaker 31a. The speaker 31a outputs audio data as audio in accordance with the control of the audio output control unit 30a. That is, the receiver 2a is a television receiver having a function for receiving broadcast content and a function for reproducing (displaying and outputting sound). Note that the display 28a and the speaker 31a may be external devices externally attached to the receiver 2a.

The control unit 29a controls each unit included in the receiver 2a according to the received control information. Specifically, the decryption control unit 40a controls the decryption unit 22a to decrypt the content. In addition, the demultiplexing control unit 41a controls the demultiplexing unit 23a to perform demultiplexing of content.

This point will be explained in more detail. The demultiplexing unit 23a first selects a TS packet including control information (PMT), acquires the control information, and outputs the acquired control information to the control information acquisition unit 42a. The control information acquisition unit 42a transfers the acquired control information to the demultiplexing control unit 41a. The demultiplexing control unit 41a can specify the TS packet including the audio component of the content and the TS packet including the video component of the content by referring to the control information from the control information acquisition unit 42a. .

Then, the demultiplexing control unit 41a controls the demultiplexing unit 23a to select a TS packet including the audio component and output the audio component to the audio decoder 24a, and also includes the TS including the video component. The packet is selected and the video component is output to the video decoder 25a. As a result, the TS packet is demultiplexed into the control information, the audio component of the content, and the video component of the content.

In the present embodiment, when the acquired control information includes audio attribute information, the control information acquisition unit 42a determines whether audio can be reproduced from the audio component of the content by the receiver 2a. Since this determination can be performed before the audio decoder 24a decodes the audio component, it can be performed more quickly than in the past.

[Example of PMT including voice attribute information]
Next, an example of PMT including voice attribute information will be described with reference to FIG. FIG. 12 is a diagram illustrating an example of a PMT including audio attribute information. The illustrated PMT includes a descriptor D11 (version_number) indicating the version of the PMT, a descriptor D12 (program_number) indicating the program ID of the PMT, and a descriptor D13 (descriptor including voice attribute information). ())It is included.

In the descriptor D13, a predetermined tag descriptor_tag indicating that the descriptor (descriptor) is a descriptor related to the audio attribute information, a descriptor_length indicating the length of the descriptor, and a data body of the audio attribute information Data () is described. Note that the value of descriptor_tag only needs to be able to specify that the descriptor D13 contains a description relating to audio attribute information. For example, in ARIBARISTD-B21 that defines the standard for digital broadcasting, it indicates other descriptors. An unused value of “0xF8” may be used.

Here, generally, in television broadcasting, video and audio with different sources are transmitted continuously, and there is a possibility that audio of such different sources has different audio attributes. Therefore, in order to deal with such a case, when the source changes, the control information generation unit 18a updates the audio attribute information in the PMT and also updates the version information (the value of the descriptor D11) of the PMT. To do. In the receiver 2a, the control information acquisition unit 42a checks the audio attribute information every time the version of the PMT is updated, and if there is an update, transmits the new audio attribute information to the audio decoder 24a. As a result, it is possible to perform appropriate processing according to a change in sound.

In the example of FIG. 12, descriptor_length has a value of “0x14” and is 32 bits. In data (), as the audio attribute information, the number of audio channels (CH1), the number of subwoofer (SW) channels (CH2), the audio format (Format), the audio sampling frequency (Sampl_freq), and the audio quantization The number of bits (Bit_rate), the form of simulcast (Simul) and the channel (Simul_CH) are encoded and stored in order. FIG. 3 is a diagram showing a specific example of the audio attribute information stored in the PMT shown in FIG. 12 in a table format. The audio attribute information stored in the PMT is the same as that described with reference to FIG.

[Receiver processing for audio attribute information]
Next, the processing of the receiver 2a regarding the audio attribute information will be described with reference to FIG. FIG. 13 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42a of the receiver 2a regarding the audio attribute information.

First, the control information acquisition unit 42a extracts a PMT from the control information output from the demultiplexing unit 23a, and acquires voice attribute information from the extracted PMT (S31). Specifically, the control information acquisition unit 42a determines from the extracted PMT a descriptor (descriptor) whose descriptor_tag value matches the tag value (0xF8 in the example of FIG. 12) assigned in advance to the audio attribute information. Extraction is performed, the extracted descriptor is analyzed, and voice attribute information included in the descriptor is acquired.

Next, the control information acquisition unit 42a extracts an audio format from the acquired audio attribute information, and determines whether or not the extracted audio format can be decoded by the audio decoder 24a of the receiver 2 ( S32) If decoding is possible (YES in S32), the number of audio channels is extracted from the audio attribute information, and whether or not the extracted audio channel number is decodable by the audio decoder 24a. Judgment is made (S33). If decoding is possible (YES in S33), the control information acquisition unit 42a transmits the audio attribute information to the audio decoder 24a, and decodes the audio data based on the audio attribute information. (S34), and the process is terminated.

On the other hand, if the audio format cannot be decoded by audio decoder 24a (NO in S32), or if the number of audio channels cannot be decoded by audio decoder 24a (NO in S33), the control information The acquiring unit 42a acquires the simulcast type and channel from the acquired audio attribute information (S35), and determines whether or not the simulcast exists (S36). If the simulcast is present (YES in S36), the control information acquisition unit 42a controls the tuner 20a so as to switch to the simulcast and receive (S37). Then, it returns to step S31 and repeats the said operation | movement.

On the other hand, when the simulcast does not exist (NO in S36), control information acquisition unit 42 instructs display control unit 27a to display a caution indicating that the audio data is not supported on display 28a. (S38), the process ends.

In the flowchart shown in FIG. 13, it is determined whether or not the audio format and the number of audio channels in the audio attribute information can be decoded. However, the audio channel information such as the SW channel number, sampling frequency, quantization bit number, etc. It may be determined whether other information necessary for reproduction of each can be decoded. In this case, steps S32 and S33 shown in FIG. 13 may be changed to the following processing.

That is, the control information acquisition unit 42a extracts various information necessary for audio reproduction from the acquired audio attribute information, and all of the extracted information can be decoded by the audio decoder 24a of the receiver 2a. Whether or not (S32 ′). If it can be decoded (YES in S32 '), the process proceeds to step S34. On the other hand, if it cannot be decoded (NO in S32 '), the process proceeds to step S35.

[Modification]
Note that the audio attribute information shown in FIG. 3 may include an audio format in simulcast, the number of audio channels, and the number of subwoofer (SW) channels. In this case, after switching to simulcast in step S7 of FIG. 13, steps S1 to S3 are omitted and step S4 is executed, that is, audio data is decoded based on the audio attribute information of the simulcast. Thus, the audio decoder 24a may be instructed.

[Embodiment 8]
The eighth embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

By the way, even if the audio data cannot be handled by the receiver 2a, the audio data may be supported by an external audio output device connected to the receiver 2a. Therefore, in the present embodiment, when the receiver 2a determines that the above case is satisfied based on the audio attribute information included in the control information, the audio data is not decoded and the audio data is converted into the audio data as it is. It is transferred to the output device (sound reproduction device) 6a. Thereby, even if the sound data cannot be reproduced by the own device, it can be quickly reproduced and output by the external sound output device 6a.

FIG. 14 is a block diagram showing an example of a main configuration of the broadcast signal transmission system 5a according to the present embodiment. The broadcast signal transmission system 5a according to this embodiment is different from the broadcast signal transmission system 5 shown in FIG. 11 in that an audio output device 6 that is communicably connected to the receiver 2 is added. Further, in the receiver 2a shown in FIG. 14, a switching unit (transfer unit) 32a and an audio output communication I / F (external attribute acquisition unit, transfer unit) 33a are added compared to the receiver 2a shown in FIG. Is different from the control information acquisition unit 42a in the control unit 29a in that a control information acquisition unit (control information acquisition unit, determination unit, external attribute acquisition unit, transfer unit) 42aa is provided, Other configurations are the same.

The audio output device 6a outputs audio based on audio data received from the outside. The audio output device 6a includes functional blocks similar to the audio decoder 24a, the audio output control unit 30a, the speaker 31a, and the audio output communication I / F 33a in the receiver 2a.

The switching unit 32a is provided between the demultiplexing unit 23a and the audio decoder 24a, and the output destination of the audio component from the demultiplexing unit 23a is set to one of the audio decoder 24a and the audio output communication I / F 33a. Switching is performed based on an instruction from the control unit 29a.

The voice output communication I / F 33a is for data communication with the voice output device 6a. In the present embodiment, the audio output device 6a and the audio output communication I / F 33a output a digital audio signal as it is, for example, SPDIF (Sony Philips Digital InterFace), ARC (Audio Return Channel), and the like. The bit stream output can be handled. The communication between the audio output device 6a and the audio output communication I / F 33a may be wired communication or wireless communication.

The control information acquisition unit 42aa has the following functions added to the control information acquisition unit 42a shown in FIG. 11 and other functions are the same. That is, the control information acquisition unit 42aa acquires the audio attribute information (the number of audio channels, the number of SW channels, the audio format, etc.) that can be supported by the audio output device 6a via the audio output communication I / F 33a. Have

Further, the control information acquisition unit 42aa issues a switching instruction to the switching unit 32a based on the audio attribute information extracted from the control information from the demultiplexing unit 23a and the audio attribute information from the audio output communication I / F 33a. It has a function. Specifically, the control information acquisition unit 42aa, when the audio data from the demultiplexing unit 23a is not compatible with the audio decoder 24a of its own, but is compatible with the audio output device 6a, The switching unit 32a is instructed to switch so that the audio data is output to the audio output communication I / F 33a. Thus, the audio data is output to the audio output device 6a as it is through the audio output communication I / F 33a. In other cases than the above case, the control information acquisition unit 42aa instructs the switching unit 32a to output the audio data to the audio decoder 24a.

Next, in the present embodiment, the processing of the receiver 2a regarding the voice attribute information will be described with reference to FIG. FIG. 15 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42aa of the receiver 2a with respect to audio attribute information. The processing shown in FIG. 15 is the same as the processing shown in FIG. 13 except that steps S41 and S42 are added.

In step S41, if the audio format cannot be decoded by the audio decoder 24a (NO in S32), or if the number of audio channels cannot be decoded by the audio decoder 24a (NO in S33), The control information acquisition unit 42aa refers to the audio attribute information from the audio output device 6a via the audio output communication I / F 33a, and can the audio output device 6 support the audio format and the number of audio channels? Judging. If the audio output device 6a cannot handle the audio format and the number of audio channels (NO in S41), the process proceeds to step S35.

On the other hand, when the audio format and the number of audio channels can be handled by the audio output device 6a (YES in S41), the control information acquisition unit 42aa instructs the switching unit 32a to switch, and demultiplexes it. The audio data from the unit 23a is transferred to the external audio output device 6a via the audio output communication I / F 33a in the form as it is (S42), and the process ends.

Note that in the flowchart shown in FIG. 15, the processing in steps S32 and S33 may be changed to the processing in step S32 'as described above. In this case, if decoding is impossible (NO in S32 '), the process may proceed to step S41 instead of step S35.

[Embodiment 9]
The ninth embodiment of the present invention will be described below with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the eighth embodiment, the sound is output from either the speaker 31a of the receiver 2a or the sound output device 6 connected to the receiver 2a. However, the sound is output from both the speaker 31a and the sound output device 6a. May be output.

FIG. 16 is a block diagram illustrating an example of a main configuration of the receiver 2a of the broadcast signal transmission system 5a according to the present embodiment. Compared with the broadcast signal transmission system 5a shown in FIG. 14, the broadcast signal transmission system 5a according to the present embodiment includes two demultiplexing units 23aa and 23ab, and a selector 35a instead of the switching unit 32a. Unlike the provided points, the other configurations are the same.

The illustrated receiver 2a includes two tuners (not shown) and two decoding units (not shown). The receiver 2a receives content transmitted as a digital broadcast signal by one tuner, decodes the content by one decoding unit, and outputs the decoded content to the demultiplexing unit 23aa. Further, the receiver 2a receives the content of the simulcast of the content received by one tuner by the other tuner, decodes the content by the other decoding unit, and outputs it to the demultiplexing unit 23ab. The functions of the demultiplexing units 23aa and 23ab are the same as those of the demultiplexing unit 23a of the receiver 2a shown in FIG.

The selector 35a is an audio component output to the audio decoder 24a and the audio output communication I / F 33a, either an audio component output from the demultiplexing unit 23aa or an audio component output from the demultiplexing unit 23ab. Further, switching is performed based on an instruction from the control unit 29a. That is, in this embodiment, the audio component is output to both the audio decoder 24a and the audio output communication I / F 33a.

The control information acquisition unit 42aa functions to instruct the selector 35a to switch based on the audio attribute information extracted from the control information from the demultiplexing units 23aa and 23ab and the audio attribute information from the audio output communication I / F 33a. Have

The specific switching instruction given from the control information acquisition unit 42aa to the selector 35a is as follows.

(Case 1)
When the audio data from the demultiplexer 23aa can be handled by the audio decoder 24a and the audio output device 6a, the selector 35a outputs the audio data to the audio decoder 24a and the audio output communication I / F 33a. Instruct switching.

(Case 2)
When the audio data from the demultiplexer 23aa cannot be handled by the audio decoder 24a and can be handled by the audio output device 6a, the audio data from the demultiplexer 23ab is sent to the audio decoder 24a. The selector 35a is instructed to switch so as to output the audio data from the demultiplexer 23aa to the audio output communication I / F 33a.

(Case 3)
When the audio data from the demultiplexing unit 23aa can be handled by the audio decoder 24a and cannot be handled by the audio output device 6a, the audio data from the demultiplexing unit 23aa is sent to the audio decoder 24a. The selector 35a is instructed to switch so as to output the audio data from the demultiplexer 23ab to the audio output communication I / F 33a.

Thereby, the receiver 2a can output audio from both the speaker 31a and the audio output device 6a.

In the present embodiment, since the control information includes the audio attribute information of the content simultaneous broadcast, the audio attribute is used by using the control information from either the demultiplexing unit 23aa or the demultiplexing unit 23ab. It is good also as a structure which extracts information.

[Embodiment 10]
The following description will discuss Embodiment 10 of the present invention with reference to FIGS. 9, 17, and 18. FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

On the other hand, some receivers 2a can handle a plurality of sets of audio formats and the number of channels. Therefore, in the present embodiment, information on what can be supported by the audio decoder 24a among the plurality of audio components included in the content is displayed on the display 28a, and the audio decoder 24a decodes the audio component selected by the user. It is carried out. Thereby, a sound can be reproduced from a sound component desired by the user, and as a result, convenience for the user is improved.

FIG. 17 is a block diagram illustrating an example of a main configuration of the receiver 2a of the broadcast signal transmission system 5a according to the present embodiment. Compared to the receiver 2a shown in FIG. 11, the receiver 2a of the present embodiment has a superimposition unit 26a added between the video decoder 25a and the display control unit 27a, and the control unit 29a acquires control information. The configuration is the same as the other configuration except that a control information acquisition unit (control information acquisition unit, determination unit, selection unit) 42ab is provided instead of the unit 42a.

The superimposing unit 26a superimposes other image data on the video data from the video decoder 25a. The superimposed video data is output to the display control unit 27a.

The control information acquisition unit 42ab has the following functions added to the control information acquisition unit 42a shown in FIG. 11, and other functions are the same. That is, the control information acquisition unit 42ab determines whether or not the audio decoder 24a can decode a plurality of audio components included in a certain content from the audio attribute information extracted from the control information from the demultiplexing unit 23a. It has the function to do. The control information acquisition unit 42ab has a function of generating decoding selection image data for displaying the number of audio channels and the audio format for the audio component determined to be decodable and outputting the image data to the superimposing unit 26a.

FIG. 9 is a diagram showing an example of a screen on which the decoding selection image data is displayed on the display 28a. About the said screen, it is the same as that of the content demonstrated using FIG.

Next, in the present embodiment, the processing of the receiver 2a regarding the voice attribute information will be described with reference to FIG. FIG. 18 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42ab of the receiver 2a regarding the audio attribute information. The processing shown in FIG. 18 is the same as the processing shown in FIG. 13 except that steps S51 to S53 are added.

In step S51, if the audio format can be decoded by the audio decoder 24a (YES in S32) and the number of audio channels can be decoded by the audio decoder 24a (YES in S33), control is performed. The information acquisition unit 42ab determines whether there are a plurality of audio components that can be decoded. If there is one audio component that can be decoded (NO in S51), the process proceeds to step S34.

On the other hand, when there are a plurality of audio components that can be decoded (YES in S51), the control information acquisition unit 42ab outputs the decoding selection image data to the superimposing unit 26a, thereby the number of audio channels of the audio components. And the audio format are displayed for each audio component (S52). Then, the control information acquisition unit 42ab instructs the audio decoder 24a to decode the audio component selected by the user from the plurality of audio components based on the audio attribute information (S53), and ends the processing. To do.

Note that in the flowchart shown in FIG. 18 as well, the processing in steps S32 and S33 may be changed to the processing in step S32 'as described above. In this case, if decoding is possible (YES in S32 '), the process may proceed to step S51 instead of step S34.

[Embodiment 11: Modification]
Note that this embodiment relates to a case where there are a plurality of audio components that can be decoded. On the other hand, some audio decoders 24a can downconvert 22.2 ch audio components to 5.1 ch, 2 ch audio data, for example.

Therefore, the present embodiment can also be applied when there is an audio component that can be down-converted by the audio decoder 24a. In this case, the control information acquisition unit 42ab displays the number of audio channels that can be selected by the user (for example, 22.2ch, 5.1ch, 2ch, etc.) on the lower part of the display screen shown in FIG. Is output to the superimposing unit 26a, and the audio decoder 24a may be instructed to output audio data of the number of audio channels selected by the user.

[Twelfth embodiment: implementation by software]
The control blocks (particularly the control unit 15a and the control unit 29a) of the transmitter 1a and the receiver 2a may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or a CPU (Central It may be realized by software using a Processing Unit.

In the latter case, the transmitter 1a and the receiver 2a include a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read that records the above-described program and various data so that the computer (or CPU) can read them. Only Memory) or a storage device (these are referred to as “recording media”), RAM (Random Access Memory) for expanding the program, and the like. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
A broadcast signal transmission apparatus (transmitter 1a) according to aspect 7 of the present invention is a broadcast signal transmission apparatus that transmits a digital broadcast signal, and includes a plurality of transport stream packets obtained by converting content and the plurality of transport streams. A packet generator (multiplexer 12a, control information generator 18a) that generates a transport stream packet including control information (PMT) for reconstructing the content from the packet as the digital broadcast signal; and the content An attribute acquisition unit (audio attribute acquisition unit 17a) that acquires attribute information related to the audio component, and the control information includes the attribute information.

According to the above configuration, the control information for reconfiguring the content includes attribute information (audio attribute information) regarding the audio component of the content. Thus, a receiving device that receives a plurality of transport stream packets obtained by converting the content and a transport stream packet including the control information as a digital broadcast signal reconfigures the content based on the control information. The audio attribute information of the content has already been acquired. Therefore, before the reconstructed content is reproduced, it can be determined whether the audio component of the content can be reproduced by the own device, and as a result, the determination can be performed more quickly than before.

A broadcast signal receiving apparatus (receiver 2a) according to aspect 8 of the present invention is a broadcast signal receiving apparatus that receives a plurality of transport stream packets as a digital broadcast signal, and from among the plurality of transport stream packets, A control information acquisition unit (42a) that selects a transport stream packet including control information (PMT) and acquires the control information, and the plurality of transport streams based on the control information acquired by the control information acquisition unit A reconfiguration unit (demultiplexing unit 23a) for reconfiguring content from the packet, and the control information includes attribute information related to the audio component of the content, and the attribute extracted from the control information Based on the information, it is determined whether the sound can be played on the device from the above sound component That the determination unit includes (control information acquisition unit 42a) further.

According to the above configuration, a transport stream packet including control information is selected from a plurality of transport stream packets received as a digital broadcast signal, the control information is acquired, and based on the acquired control information, Content is reconstructed from the plurality of transport stream packets. At this time, attribute information (audio attribute information) regarding the audio component of the content included in the control information has already been acquired. Therefore, before reproducing the reconstructed content, it is possible to determine whether or not the audio can be reproduced from the audio component of the content, and as a result, the determination can be performed more quickly than before. .

The broadcast signal receiving apparatus according to aspect 9 of the present invention is the above-described aspect 8, wherein the attribute information of the audio component capable of reproducing audio by the audio reproduction apparatus from an external audio reproduction apparatus that is communicably connected to the own apparatus. An external attribute acquisition unit that acquires audio, and whether the determination unit can reproduce audio from the audio component of the content on the audio reproduction device based on the attribute information acquired by the external attribute acquisition unit. And a transfer unit that transfers the audio component reconfigured by the reconfiguration unit to the external audio reproduction device when the audio reproduction device can reproduce the audio component as a result of the determination. It may be.

The broadcast signal receiving apparatus according to aspect 10 of the present invention is the broadcast signal receiving apparatus according to

aspect

8 or 9, wherein the content includes a plurality of audio components having the same content and different attribute information. When a sound can be reproduced from the plurality of sound components by the own device, the apparatus may further include a selection unit (control information acquisition unit 42ab) that allows the user to select one of the sound components. According to said structure, an audio | voice can be reproduced | regenerated from the audio | voice component which a user desires, As a result, a user's convenience improves.

A television receiver according to aspect 11 of the present invention includes the receiving device according to aspects 8 to 10 above. Therefore, the same operational effects as those of the broadcast signal receiving apparatuses according to the above aspects 8 to 10 are obtained.

The broadcast signal transmission system (5a) according to aspect 12 of the present invention includes the broadcast signal transmission apparatus according to aspect 7 and the broadcast signal reception apparatus according to aspects 8 to 10. Therefore, the same effects as the broadcast signal transmitting apparatus according to aspect 7 and the broadcast signal receiving apparatuses according to aspects 8 to 10 are achieved.

The broadcast signal transmitting apparatus and the broadcast signal receiving apparatus according to each aspect of the present invention may be realized by a computer. In this case, the computer operates as each unit included in the broadcast signal transmitting apparatus and the broadcast signal receiving apparatus. Thus, a control program for realizing the broadcast signal transmitting apparatus and the broadcast signal receiving apparatus on a computer and a computer-readable recording medium on which the program is recorded also fall within the scope of the present invention.
[Description II of Related Embodiments]
Embodiments 13 to 18 will be described below.

[Embodiment 13]
Hereinafter, a thirteenth embodiment of the present invention will be described in detail with reference to FIGS. First, the configuration of the broadcast signal transmission system according to the present embodiment will be described with reference to FIG. FIG. 19 is a block diagram illustrating an example of a main configuration of a transmitter (broadcast signal transmission device) 1b and a receiver (broadcast signal reception device) 2b included in the broadcast signal transmission system 5b.

The broadcast signal transmission system 5b is a system that transmits a video signal, an audio signal, and the like (hereinafter abbreviated as “video signal”) from the transmitter 1b to the receiver 2b. The broadcast signal transmission system 5b can transmit audio signals in various formats. In the next-generation 4K / 8K broadcasting, it is considered that signals are transmitted by the MMT (MPEG Media Transport) system. Thus, in this embodiment, an example in which a video signal or the like is transmitted using the MMT method will be described, but the method for transmitting a video signal or the like is not limited to this. For example, in the current digital broadcasting, a signal is transmitted in the MPEG-2 (Moving / Picture / Experts / Group / phase-2) TS (Transport Stream) system, and a video signal or the like is transmitted in the TS system. The broadcast signal transmission system 5 can also be applied.

The transmitter 1b transmits content in the form of a video signal or the like. More specifically, the transmitter 1b transmits each packet (MMTP (MMT Protocol) packet) constituting the content through a broadcast path (broadcast transmission path). One receiver 2b has a function of receiving this content (content distributed through a broadcast path) and also has a function of receiving content distributed through a communication path via a communication network such as the Internet. . And the receiver 2b can reproduce | regenerate combining each content received via these two paths | routes. In the figure, only one receiver 2b is shown, but the transmitter 1b broadcasts content to a plurality of receivers 2b.

[Configuration of transmitter]
As illustrated, the transmitter 1b includes an audio encoder 10b, a video encoder 11b, a multiplexing unit (packet generation unit) 12b, an encryption unit 13b, a transmission unit 14b, and a control unit 15b. The control unit 15b includes an encoding control unit 16b, an audio attribute acquisition unit (attribute acquisition unit) 17b, and a control information generation unit (packet generation unit) 18b.

The audio encoder 10b encodes (encodes) the audio (sound) stream of the content transmitted by the transmitter 1b and outputs it to the multiplexing unit 12. Similarly, the video encoder 11b encodes (encodes) a video (video) stream of content transmitted by the transmitter 1 and outputs the encoded video (video) stream to the multiplexing unit 12b.

The multiplexing unit 12b multiplexes the audio stream output from the audio encoder 10b, the video stream output from the video encoder 11b, and the control information output from the control unit 15b, converts the information into an MMTP packet, and outputs the MMTP packet to the encryption unit 13b. .

The encryption unit 13b encrypts the MMTP packet output from the multiplexing unit 12b and outputs the encrypted MMTP packet to the transmission unit 14b. Then, the transmission unit 14b transmits the encrypted MMTP packet output from the encryption unit 13b to the receiver 2 through the broadcast path in the form of a digital broadcast signal.

The control unit 15b performs control of each unit included in the transmitter 1b. Specifically, the encoding control unit 16b included in the control unit 15b controls the audio encoder 10b and the video encoder 11b to perform encoding.

The audio attribute acquisition unit 17b acquires audio attribute information that is attribute information related to the audio of the content transmitted by the transmitter 1b, and outputs the acquired audio attribute information to the control information generation unit 18b. Here, the “content transmitted by the transmitter 1b” includes content that is scheduled to be transmitted by the transmitter 1b, that is, content that is scheduled to be broadcast.

Examples of audio attribute information include the audio format, the number of audio channels, the number of subwoofer (SW) channels, the form and channel of simulcast, the sampling frequency, the number of quantization bits, and the like. Among these, the audio format, the number of audio channels, the number of subwoofer (SW) channels, the sampling frequency, and the number of quantization bits can be acquired from the encoding control unit 16b. On the other hand, the form and channel of simulcasting can be acquired from an external server (not shown) that provides detailed information on the content (program) transmitted (broadcasted) by the transmitter 1b. Details of the audio attribute information will be described later.

The control information generation unit 18b generates control information for the receiver 2b to reconfigure the content transmitted by the transmitter 1b. This control information is called MMT-SI (Service Information) in MMT, and includes various information related to content. Here, information related to the content (package) of MMT-SI is described. The description will focus on the generation of EIT (Event Information Table). In the next-generation ultra-high-definition television broadcasting, an EIT called MH-EIT (MPEG-H Event Information Table) is used. In the present specification, the term “EIT” includes both “EIT of current broadcasting” and “MH-EIT”.

Thus, in the transmitter 1b, the voice attribute acquisition unit 17b executes a process of acquiring voice attribute information (voice attribute acquisition step). On the other hand, the control information generation unit 18b executes processing for generating control information (EIT) including the audio attribute information with reference to the conversion from the audio stream and the video stream to the MMTP packet in the multiplexing unit 12b. . Accordingly, in the receiver 2b that has received this EIT, the content is subjected to appropriate processing according to the audio attribute information and output as audio, or a caution indicating that the content does not correspond to audio data is notified. It becomes possible to do.

Note that the encoding control unit 16b acquires the audio attribute information of each content for each content transmitted by the transmitter 1, and the control information generation unit 18 generates an EIT including the audio attribute information. As described above, by generating EIT including different audio attribute information for each content, it is possible to always reproduce the content by an optimum process.

As described above, since the transmitter 1b is configured to transmit the EIT including the voice attribute information, the transmitter 1b can transmit the voice attribute information without changing the conventional configuration.

[Configuration of receiver]
As shown, the receiver 2b includes a tuner 20b, a communication I / F 21b, a decoding unit 22b, a demultiplexing unit (reconstruction unit) 23b, an audio decoder 24b, a video decoder 25b, a display control unit 27b, a display 28b, and a control. Unit 29b, audio output control unit 30b, speaker 31b, and OSD generation unit 34b. The control unit 29b includes a decoding control unit 40b, a demultiplexing control unit (reconstruction unit) 41b, and a control information acquisition unit (control information acquisition unit, determination unit) 42b.

The tuner 20b receives content and the like transmitted as a digital broadcast signal through the broadcast path and outputs them to the decoding unit 22b. On the other hand, the communication I / F 21b receives content and the like transmitted through the communication path and outputs them to the decoding unit 22b.

When the content received via the tuner 20b and the communication I / F 21b is encrypted, the decryption unit 22b decrypts the content and outputs it to the demultiplexing unit 23b.

The demultiplexing unit 23b demultiplexes the data output from the decryption unit 22b (encrypted but decrypted). Then, each component (component) of the content obtained by demultiplexing is processed according to the type of the component. Specifically, in the demultiplexing unit 23b, the audio component is output to the audio decoder 24b, the video component is output to the video decoder 25b, and the control information is output to the control information acquisition unit 42b.

The audio decoder 24b decodes the audio component output from the demultiplexer 23b and outputs audio data. Similarly, the video decoder 25b decodes the video component output from the demultiplexer 23b and outputs video data.

The display control unit 27b performs control to display the video data on the display 28b. The display 28b displays video data according to the control of the display control unit 27b. On the other hand, the audio output control unit 30b performs control to output audio data from the speaker 31b. The speaker 31b outputs audio data as audio in accordance with the control of the audio output control unit 30b. That is, the receiver 2b is a television receiver having a function for receiving broadcast content and a function for reproducing (displaying and outputting sound). The display 28b and the speaker 31b may be external devices externally attached to the receiver 2b.

The control unit 29b controls each unit included in the receiver 2b according to the received control information. Specifically, the decryption control unit 40b controls the decryption unit 22b to decrypt the content. Also, the demultiplexing control unit 41b controls the demultiplexing unit 23b to demultiplex the content.

This point will be explained in more detail. The demultiplexing unit 23b first selects an MMTP packet including control information (EIT), acquires the control information, and outputs the acquired control information to the control information acquisition unit 42. The control information acquisition unit 42b transfers the acquired control information to the demultiplexing control unit 41b. The demultiplexing control unit 41b can identify the MMTP packet including the audio component of the content and the MMTP packet including the video component of the content by referring to the control information from the control information acquisition unit 42b. .

Then, the demultiplexing control unit 41b controls the demultiplexing unit 23b to select the MMTP packet including the audio component, and output the audio component to the audio decoder 24b, and the MMTP including the video component. The packet is selected and the video component is output to the video decoder 25b. As a result, the MMTP packet is demultiplexed into the control information, the audio component of the content, and the video component of the content.

In the present embodiment, the control information acquisition unit 42b outputs the acquired control information to the OSD generation unit 34b. When the acquired control information includes audio attribute information, the control information acquisition unit 42b outputs audio from the audio component of the content. It is determined whether or not the receiver 2 can reproduce. Since this determination can be performed before the audio decoder 24b decodes the audio component, it can be performed more quickly than in the past.

The OSD generation unit 34b refers to the control information (EIT) output from the control information acquisition unit 42b, and generates an OSD image indicating an electronic program guide (EPG: Electronic Program Guide). When the control information includes audio attribute information, the electronic program guide generated by the OSD generation unit 34b can further include audio attribute information of each content. The OSD image generated by the OSD generation unit 34b is superimposed on the video data output from the video decoder 25b and supplied to the display control unit 27b. The OSD generation unit 34b may be provided in the control unit 29b.

Note that the OSD generation unit 34b may acquire the control information output by the demultiplexing unit 23b performing demultiplexing. In the above case, the OSD generation unit 34b analyzes the control information to generate an OSD image indicating the electronic program guide. If the control information includes audio attribute information, the OSD generation unit 34b converts the information into the audio decoder 24b. It is good also as a structure so that it may output to. In the above case, the control information acquisition unit can be realized with a minimum change without adding a new configuration to the conventional configuration.

[Example of EIT including voice attribute information]
Next, an example of EIT including voice attribute information will be described with reference to FIG. FIG. 20A is a diagram illustrating an example of an EIT including audio attribute information. The illustrated EIT includes a descriptor D1 (version_number) indicating the version of the EIT, a descriptor D2 (service_id) indicating the service ID of the EIT, and a descriptor D3 (descriptor including voice attribute information) ())It is included.

Here, generally, in television broadcasting, video and audio with different sources are transmitted continuously, and there is a possibility that audio of such different sources has different audio attributes. Therefore, in order to deal with such a case, when the source changes, the control information generation unit 18b updates the audio attribute information in the EIT and also updates the EIT version information (value of the descriptor D1). To do. In the receiver 2b, the control information acquisition unit 42 checks the audio attribute information every time the EIT version is updated, and if there is an update, transmits the new audio attribute information to the audio decoder 24b. As a result, it is possible to perform appropriate processing according to a change in sound.

In the example of FIG. 20A, descriptor_length is a value of “Ox20” and is 32 bits.
In data (), as the audio attribute information, the number of audio channels (CH1), the number of subwoofer (SW) channels (CH2), the audio format (Format), the audio sampling frequency (Sampl_freq), and the audio quantization The number of bits (Bit_rate), the form of simulcast (Simul) and the channel (Simul_CH), and the audio format of simulcast (Simul_Format) are coded and stored in order. FIG. 21 is a diagram showing a specific example of the audio attribute information stored in the EIT shown in FIG.

The broadcast signal transmission system 5b of this embodiment corresponds to an ultra-high-detail television broadcasting system. Therefore, in the example of FIG. 21, the audio format (Format) includes PCM (Pulse Code Modulation), MPEG2 (Moving Picture Picture Experts Group Group 2) -AAC (Advanced Audio Coding), MPEG4-AAC, MPEG2-AC3 (Audio Code number 3), etc., and each is assigned to a 4-bit code. Also, in order to support 22.2 ch three-dimensional sound, the number of audio channels (CH1) is in the range of 0 to 24, and each is assigned to a 5-bit code, and the number of SW channels (CH2) Are in the range of 0-2, each assigned to a 2-bit code. Further, there are 16, 22.05, 24, 32, 44.1, 48, 96, 192, and the like as audio sampling frequencies (kHz), and each is assigned to a 4-bit code. In addition, there are 8, 10, 16, 24, 32, and the like as quantization bit numbers (bits) of speech, and each is assigned to a 3-bit code.

By the way, simultaneous broadcasting means that one broadcasting station broadcasts the same program in different channels (frequency bands), different broadcasting systems, or different broadcasting media in the same time zone. In the example of FIG. 21, there are terrestrial digital broadcasting, BS (Broadcasting Satellite) digital broadcasting, CS (Communications Satellite) digital broadcasting, the Internet, and the like in the form of simulcast (Simul), and each is assigned to a 4-bit code ing. The simulcast channel (Simul_CH) includes 1ch to 1000ch, and each is assigned to a 12-bit code. Further, the simulcast audio format (Simul_Format) includes MPEG2-AAC, MPEG4-AAC, MPEG2-AC3, and the like, similar to the audio format (Format), and each is assigned to a 4-bit code. Note that one-segment broadcasting, radio broadcasting, or the like may be used as simultaneous broadcasting.

Here, in the conventional EIT, an audio component descriptor, which is a descriptor describing information related to an audio component of content, is defined. In the audio component descriptor, for example, component_type indicating the type of the audio component, stream_type indicating the format of the audio stream (for example, MPEG2 BC (Backward） Compatible) Audio, AAC Audio), sampling_rate indicating the audio sampling frequency, audio quality Quality_indicator indicating the mode, simulcast_group_tag for identifying the simulcast group, and the like are included.

Noteworthy in the present embodiment is that the audio format of the simulcast is described as the audio attribute information of the audio component of the simulcast of content in the descriptor D3 shown in FIG. Therefore, before playing the reconstructed content, the receiver 2 determines that the sound of the content cannot be played back by itself, refers to the attribute information, and receives the broadcast signal to be received as the content. Can be switched to the simulcast signal. As a result, it is possible to quickly switch to the simulcast.

In the above audio component descriptor, detailed information regarding the audio component is described as text. Therefore, the information indicating the form of simulcast, the channel, and the audio format may be described as text in the audio component descriptor. FIG. 20B is a diagram illustrating another example of the descriptor D3 including the audio attribute information in the EIT illustrated in FIG. In the example shown in FIG. 20B, “0xC4” indicating the voice component descriptor is described as the value of descriptor_tag in the descriptor D3. In the text_char in the descriptor D3 shown in FIG. 20B, text indicating the form of simulcast, the channel, and the audio format, for example, “BS digital 2ch
A text such as “PCM” is described. The control information acquisition unit 42b acquires voice attribute information by analyzing the text. Note that if the text described in text_char is described with a predetermined hash tag such as “#”, for example, whether or not the text is text indicating audio attribute information. Such a determination can be facilitated. According to said structure, audio | voice attribute information can be transmitted, without changing the conventional structure significantly.

[Receiver processing for audio attribute information]
Next, the processing of the receiver 2b regarding the audio attribute information will be described with reference to FIG. FIG. 22 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42b of the receiver 2b regarding the audio attribute information.

First, the control information acquisition unit 42b extracts EIT from the control information output from the demultiplexing unit 23b, and acquires voice attribute information from the extracted EIT (S61). Specifically, the control information acquisition unit 42b determines from the extracted EIT a descriptor (descriptor) whose descriptor_tag value matches the tag value (0xF8 in the example of FIG. 20) assigned in advance to the voice attribute information. Extraction is performed, the extracted descriptor is analyzed, and voice attribute information included in the descriptor is acquired.

Next, the control information acquisition unit 42b extracts an audio format from the acquired audio attribute information, and determines whether or not the extracted audio format can be decoded by the audio decoder 24b of the receiver 2 ( S62). If decoding is possible (YES in S62), the control information acquisition unit 42b transmits the audio attribute information to the audio decoder 24b and decodes the audio data based on the audio attribute information. (S63), and the process is terminated.

On the other hand, when the audio format is not decodable by the audio decoder 24b (NO in S62), the control information acquisition unit 42b extracts the simulcast audio attribute information from the acquired audio attribute information (S64). It is determined whether the audio format of the simulcast is decodable by the audio decoder 24b of the receiver 2b (S65). If decoding is possible (YES in S65), the control information acquisition unit 42b controls the audio decoder 24b to switch to the simulcast audio format (S66), and the tuner to switch to the simulcast and receive. 20b is controlled (S67). Thereafter, the control information acquisition unit 42b transmits simulcast audio attribute information to the audio decoder 24b, instructs the audio decoder 24b to decode the audio data based on the information (S63), and performs processing. finish.

On the other hand, when the audio format of the simulcast cannot be decoded by the audio decoder 24b (NO in S65), the control information acquisition unit 42b displays a caution indicating that the audio data is not supported on the display 28. In this way, the display control unit 27b is instructed (S68), and the process is terminated.

In the flowchart shown in FIG. 22, it is determined whether or not the audio format in the audio attribute information can be decoded. However, the number of audio channels, the number of SW channels, the sampling frequency, the number of quantization bits, etc. Whether other information necessary for reproduction can be decoded may be determined. In this case, step S62 shown in FIG. 22 may be changed to the following processing.

That is, the control information acquisition unit 42b extracts various information necessary for audio reproduction from the acquired audio attribute information, and all of the extracted information can be decoded by the audio decoder 24b of the receiver 2b. Whether or not (S62 ′). If it can be decoded (YES in S62 '), the process proceeds to step S63. On the other hand, if it cannot be decoded (NO in S62 '), the process proceeds to step S64.

If the audio attribute information of simulcast is described in the text_char in the descriptor D3 (see FIG. 20B), the control information acquisition unit 42 analyzes the extracted descriptor in step S64. Thus, it may be configured to determine whether or not the text indicating the voice attribute information is included in the descriptor and extract the voice attribute information included in the descriptor.

[Modification]
Note that the audio attribute information shown in FIG. 21 may include the number of audio channels in simulcast and the number of subwoofer (SW) channels. In this case, after switching to the simulcast in step S7 of FIG. 22, the audio decoder 24 may be instructed to decode the audio data based on the audio attribute information of the simulcast.

[Embodiment 14]
The following description will discuss Embodiment 14 of the present invention with reference to FIGS. 23 and 24. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

By the way, even if the audio data cannot be handled by the receiver 2b, the audio data may be handled by an external audio output device connected to the receiver 2b. Therefore, in the present embodiment, when the receiver 2 determines that the above case is satisfied based on the audio attribute information included in the control information, the audio data is not decoded and the audio data is converted into the audio data as it is. It is transferred to the output device (sound reproduction device) 6b. As a result, even if the audio data cannot be reproduced by the own device, it can be quickly reproduced and output by the external audio output device 6b.

FIG. 23 is a block diagram illustrating an example of a main configuration of the broadcast signal transmission system 5b according to the present embodiment. The broadcast signal transmission system 5b according to the present embodiment is different from the broadcast signal transmission system 5b shown in FIG. 19 in that an audio output device 6b that is communicably connected to the receiver 2b is added. In addition, the receiver 2b illustrated in FIG. 23 includes a switching unit (transfer unit) 32b and an audio output communication I / F (external attribute acquisition unit, transfer unit) 33b as compared with the receiver 2b illustrated in FIG. Is different from the control information acquisition unit 42b in the control unit 29b in that a control information acquisition unit (control information acquisition unit, determination unit, external attribute acquisition unit, transfer unit) 42ba is provided, Other configurations are the same.

The audio output device 6b outputs audio based on audio data received from the outside. The audio output device 6 includes functional blocks similar to the audio decoder 24b, the audio output control unit 30b, the speaker 31b, and the audio output communication I / F 33b in the receiver 2.

The switching unit 32b is provided between the demultiplexing unit 23b and the audio decoder 24b, and the output destination of the audio component from the demultiplexing unit 23b is set to one of the audio decoder 24b and the audio output communication I / F 33b. Switching is performed based on an instruction from the control unit 29b.

The audio output communication I / F 33b is for data communication with the audio output device 6b. In the present embodiment, the audio output device 6b and the audio output communication I / F 33b output a digital audio signal as it is, such as SPDIF (Sony Philips Digital InterFace) and ARC (Audio Return Channel). The bit stream output can be handled. The communication between the audio output device 6b and the audio output communication I / F 33b may be wired communication or wireless communication.

The control information acquisition unit 42ba has the following functions added to the control information acquisition unit 42b shown in FIG. 19 and other functions are the same. That is, the control information acquisition unit 42ba acquires the audio attribute information (the number of audio channels, the number of SW channels, the audio format, etc.) that can be supported by the audio output device 6b via the audio output communication I / F 33b. Have

Further, the control information acquisition unit 42ba issues a switching instruction to the switching unit 32b based on the audio attribute information extracted from the control information from the demultiplexing unit 23b and the audio attribute information from the audio output communication I / F 33b. It has a function. Specifically, the control information acquisition unit 42ba, when the audio data from the demultiplexing unit 23b cannot be handled by the own audio decoder 24b, but can be handled by the audio output device 6b, The switching unit 32b is instructed to switch so that the audio data is output to the audio output communication I / F 33b. Thus, the audio data is output to the audio output device 6b as it is through the audio output communication I / F 33b. Note that the control information acquisition unit 42ba instructs the switching unit 32b to output the audio data to the audio decoder 24b in cases other than the above case.

Next, in the present embodiment, processing of the receiver 2b regarding the audio attribute information will be described with reference to FIG. FIG. 24 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42ba of the receiver 2b regarding the audio attribute information. The process shown in FIG. 24 is the same as the process shown in FIG. 22 except that the processes of steps S71 and S72 are added.

In step S71, if the audio format cannot be decoded by the audio decoder 24b (NO in S62), the control information acquisition unit 42ba transmits the audio attribute from the audio output device 6b to the audio output communication I / F 33b. With reference to the information, it is determined whether the audio output device 6b can handle the audio format. If the audio format cannot be handled by the audio output device 6b (NO in S71), the process proceeds to step S64.

On the other hand, when the audio format can be handled by the audio output device 6b (YES in S71), the control information acquisition unit 42ba instructs the switching unit 32b to switch the audio data from the demultiplexing unit 23b. Is transferred to the external audio output device 6b via the audio output communication I / F 33b as it is (S72), and the process is terminated.

In the flowchart shown in FIG. 24, the process in step S62 may be changed to the process in step S62 'as described above. In this case, if decoding is impossible (NO in S62 '), the process may proceed to step S71 instead of step S64.

[Embodiment 15]
The fifteenth embodiment of the present invention will be described below with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the fourteenth embodiment, audio is output from either the speaker 31b of the receiver 2b or the audio output device 6b connected to the receiver 2b. However, the audio is output from both the speaker 31b and the audio output device 6b. May be output.

FIG. 25 is a block diagram illustrating an example of a main configuration of the receiver 2b of the broadcast signal transmission system 5b according to the present embodiment. Compared with the broadcast signal transmission system 5b shown in FIG. 23, the broadcast signal transmission system 5b according to the present embodiment includes two demultiplexing units 23ba and 23bb, and a selector 35b instead of the switching unit 32b. Unlike the provided points, the other configurations are the same.

The illustrated receiver 2b includes two tuners (not shown) and two decoding units (not shown). The receiver 2b receives content transmitted as a digital broadcast signal by one tuner, decodes the content by one decoding unit, and outputs it to the demultiplexing unit 23ba. Further, the receiver 2b receives the content of the simulcast of the content received by one tuner by the other tuner, decodes the content by the other decoding unit, and outputs it to the demultiplexing unit 23bb. The functions of the demultiplexing units 23ba and 23bb are the same as those of the demultiplexing unit 23b of the receiver 2b shown in FIG.

The selector 35b selects an audio component to be output to the audio decoder 24b and the audio output communication I / F 33b as either an audio component output from the demultiplexing unit 23ba or an audio component output from the demultiplexing unit 23bb. Further, switching is performed based on an instruction from the control unit 29b. That is, in this embodiment, the audio component is output to both the audio decoder 24b and the audio output communication I / F 33b.

The control information acquisition unit 42ba performs a switching instruction to the selector 35b based on the audio attribute information extracted from the control information from the demultiplexing units 23ba and 23bb and the audio attribute information from the audio output communication I / F 33b. Have

The specific switching instruction given to the selector 35 from the control information acquisition unit 42ba is as follows.

(Case 1)
When the audio data from the demultiplexer 23ba can be handled by the audio decoder 24b and the audio output device 6b, the audio data is output to the audio decoder 24b and the audio output communication I / F 33b to the selector 35b. Instruct switching.

(Case 2)
When the audio data from the demultiplexer 23ba cannot be handled by the audio decoder 24b and can be handled by the audio output device 6b, the audio data from the demultiplexer 23bb is sent to the audio decoder 24b. The selector 35b is instructed to switch so as to output the audio data from the demultiplexer 23ba to the audio output communication I / F 33b.

(Case 3)
When the audio data from the demultiplexer 23ba can be handled by the audio decoder 24b and cannot be handled by the audio output device 6b, the audio data from the demultiplexer 23ba is sent to the audio decoder 24b. The selector 35b is instructed to switch so as to output the audio data from the demultiplexer 23bb to the audio output communication I / F 33b.

Thereby, the receiver 2b can output audio from both the speaker 31b and the audio output device 6b.

In the present embodiment, since the control information includes the audio attribute information of the content simultaneous broadcast, the audio attribute is used by using the control information from either the demultiplexing unit 23ba or the demultiplexing unit 23bb. It is good also as a structure which extracts information.

[Embodiment 16]
Embodiment 16 of the present invention will be described below with reference to FIGS. 26 to 27. FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

On the other hand, some receivers 2b can handle a plurality of sets of audio formats and the number of channels. Therefore, in the present embodiment, information on what can be supported by the audio decoder 24b among the plurality of audio components included in the content is displayed on the display 28b, and the audio decoder 24b decodes the audio component selected by the user. It is carried out. Thereby, a sound can be reproduced from a sound component desired by the user, and as a result, convenience for the user is improved.

FIG. 26 is a block diagram illustrating an example of a main configuration of the receiver 2b of the broadcast signal transmission system 5b according to the present embodiment. Compared to the receiver 2b shown in FIG. 19, the receiver 2b of the present embodiment has a control information acquisition unit (control information acquisition unit, determination unit, selection unit) 42bb instead of the control information acquisition unit 42b in the control unit 29b. The other configurations are the same.

The control information acquisition unit 42bb has the following functions added to the control information acquisition unit 42b shown in FIG. 19, and other functions are the same. That is, the control information acquisition unit 42bb determines whether or not the audio decoder 24b can decode a plurality of audio components included in a certain content from the audio attribute information extracted from the control information from the demultiplexing unit 23b. It has the function to do. Further, the control information acquisition unit 42bb instructs the OSD generation unit 34b to generate image data for decoding selection for displaying the number of audio channels and the audio format related to the audio component determined to be decodable. It has a function.

FIG. 9 is a diagram showing an example of a screen on which the decoding selection image data is displayed on the display 28b. About the said screen, it is the same as that of the content demonstrated using FIG.

Next, in the present embodiment, the processing of the receiver 2b regarding the audio attribute information will be described with reference to FIG. FIG. 27 is a flowchart illustrating an example of processing executed by the control information acquisition unit 42bb of the receiver 2b regarding audio attribute information. The process shown in FIG. 27 is the same as the process shown in FIG. 22 except that the processes of steps S81 to S83 are added.

In step S81, if the audio format can be decoded by the audio decoder 24b (YES in S62), the control information acquisition unit 42bb determines whether there are a plurality of audio components that can be decoded. If there is one audio component that can be decoded (NO in S81), the process proceeds to step S63.

On the other hand, when there are a plurality of decodable audio components (YES in S81), the control information acquisition unit 42bb instructs the OSD generation unit 34b to generate the decode selection image data, thereby The number of audio channels and the audio format of the audio component are displayed for each audio component (S82). Then, the control information acquisition unit 42bb instructs the audio decoder 24b to decode the audio component selected by the user from the plurality of audio components based on the audio attribute information (S83), and ends the process. To do.

In the flowchart shown in FIG. 27, the process in step S62 may be changed to the process in step S62 'as described above. In this case, if decoding is possible (YES in S62 '), the process may proceed to step S81 instead of step S63.

[Embodiment 17: Modification]
Note that this embodiment relates to a case where there are a plurality of audio components that can be decoded. On the other hand, some audio decoders 24 can down-convert 22.2 ch audio components into, for example, 5.1 ch, 2 ch audio data.

Therefore, the present embodiment can also be applied when there are audio components that can be down-converted by the audio decoder 24b. In this case, the control information acquisition unit 42bb indicates to the OSD generation unit 34b the number of audio channels (for example, 22.2ch, 5.1ch, 2ch, etc.) that can be selected by the user in the lower part of the display screen shown in FIG. The audio decoder 24b may be instructed to generate image data to be displayed and output audio data of the number of audio channels selected by the user.

[Electronic program guide in the receiver 2b]
Next, the electronic program guide in the receiver 2b will be described with reference to FIG. FIG. 28 is a diagram illustrating an example of an electronic program guide generated by the OSD generation unit 34b of the receiver 2b with reference to an EIT including audio attribute information. As shown in FIG. 28, in the electronic program guide generated by the OSD generation unit 34b, cells indicating each content are arranged on a two-dimensional plane spanned by an axis indicating the content channel and an axis indicating the time. . As shown in FIG. 28, when an operation for focusing on one of the cells of the electronic program guide is performed, information on the content corresponding to the cell is displayed in close-up. Examples of the information related to the content include a program name, a broadcast time, a performer, and text indicating the content.

In the present embodiment, a configuration in which audio attribute information is included in the EIT is adopted. Therefore, in this embodiment, the audio information of each content can be presented in the electronic program guide generated by the OSD generation unit 34b. As shown in FIG. 28, as information about each content, in addition to the program name, broadcast time, performer, and text indicating the content of the content, the text indicating the audio attribute information of the content is “22.2ch,. "Is further presented.

In addition, it is good also as a structure which shows the audio | voice attribute information of each content to a user by changing the color of each cell in an electronic program guide according to the audio | voice attribute information contained in EIT.

[Embodiment 18: Implementation Example by Software]
The control blocks (particularly the control unit 15b and the control unit 29b) of the transmitter 1 and the receiver 2 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or a CPU (Central It may be realized by software using a Processing Unit.

In the latter case, the transmitter 1b and the receiver 2b include a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read that records the above-described program and various data so that the computer (or CPU) can read them. Only Memory) or a storage device (these are referred to as “recording media”), RAM (Random Access Memory) for expanding the program, and the like. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
A broadcast signal transmission apparatus (transmitter 1b) according to an aspect 13 of the present invention is a broadcast signal transmission apparatus that transmits a digital broadcast signal, and an attribute acquisition unit (audio attribute acquisition unit) that acquires attribute information related to an audio component of content. 17b) and a packet generator (multiplexer 12b, control information generator 18b) for generating a digital broadcast signal to which an event information table (EIT) including the attribute information is added. Includes attribute information related to the audio component of the content simulcast.

According to the above configuration, the event information table (EIT) includes attribute information (audio attribute information) related to the audio component of the content. Thereby, when the receiving device that receives the digital broadcast signal to which the EIT is added reconstructs the content, the audio attribute information of the content is already acquired. Therefore, before the reconstructed content is reproduced, it can be determined whether the audio component of the content can be reproduced by the own device, and as a result, the determination can be performed more quickly than before. In the above configuration, the attribute information includes attribute information related to the audio component of the content simulcast. Therefore, before the reconstructed content is reproduced, the receiving device determines that the sound of the content cannot be reproduced by the own device, refers to the attribute information, and receives the broadcast signal to be received as the content. Can be switched to the simulcast signal. As a result, it is possible to quickly switch to the simulcast.

The broadcast signal receiving apparatus (receiver 2b) according to the fourteenth aspect of the present invention is a broadcast signal receiving apparatus that receives a digital broadcast signal, and obtains control information that includes an event information table that includes attribute information related to the audio component of the content. Based on the attribute information extracted from the event information table, the reconfiguration unit (demultiplexing unit 23b) that reconfigures content based on the event information table acquired by the unit (42b), the control information acquisition unit A determination unit (control information acquisition unit 42b) that determines whether or not sound can be reproduced from the audio component by itself. The attribute information includes attribute information related to the audio component of the content simultaneous broadcasting. include.

According to the above configuration, the event information table (EIT) including the attribute information related to the audio component of the content is acquired, and the content is reconfigured based on the acquired EIT. At this time, attribute information (audio attribute information) regarding the audio component of the content included in the EIT has already been acquired. Therefore, before reproducing the reconstructed content, it is possible to determine whether or not the audio can be reproduced from the audio component of the content, and as a result, the determination can be performed more quickly than before. . In the above configuration, the attribute information includes attribute information related to the audio component of the content simulcast. Therefore, before the reconstructed content is reproduced, the receiving device determines that the sound of the content cannot be reproduced by the own device, refers to the attribute information, and receives the broadcast signal to be received as the content. Can be switched to the simulcast signal. As a result, it is possible to quickly switch to the simulcast.

The broadcast signal receiving apparatus according to aspect 15 of the present invention is the above-described aspect 14, wherein the attribute information of the audio component capable of reproducing audio by the audio reproduction apparatus from the external audio reproduction apparatus that is communicably connected to the own apparatus. And an external attribute acquisition unit (control information acquisition unit 42b) for acquiring the audio from the audio component of the content based on the attribute information acquired by the external attribute acquisition unit. If it is further determined whether or not it can be played back by the playback device, and if the result of the determination is that playback is possible by the audio playback device, the audio component reconfigured by the reconstruction unit is sent to the external audio playback device You may further provide the transfer part (switching part 32b, communication I / F33b for audio | voice output) which transfers.

The broadcast signal receiving apparatus according to aspect 16 of the present invention is the broadcast signal receiving apparatus according to

aspect

14 or 15, wherein the content includes a plurality of audio components having the same content but different attribute information. When the audio can be reproduced from the plurality of audio components by the own device, the audio apparatus may further include a selection unit (control information acquisition unit 42bb) that allows the user to select one of the audio components. According to said structure, an audio | voice can be reproduced | regenerated from the audio | voice component which a user desires, As a result, a user's convenience improves.

A television receiver according to aspect 17 of the present invention includes the receiving device according to aspects 14 to 16. Therefore, the same operational effects as those of the broadcast signal receiving apparatus according to aspects 14 to 16 are obtained.

A broadcast signal transmission system (5b) according to aspect 18 of the present invention includes the broadcast signal transmission apparatus according to aspect 13 and the broadcast signal reception apparatus according to aspects 14 to 16. Therefore, the same effects as the broadcast signal transmitting apparatus according to aspect 13 and the broadcast signal receiving apparatuses according to aspects 14 to 16 are achieved.

The broadcast signal transmitting apparatus and the broadcast signal receiving apparatus according to each aspect of the present invention may be realized by a computer. In this case, the computer operates as each unit included in the broadcast signal transmitting apparatus and the broadcast signal receiving apparatus. Thus, a control program for realizing the broadcast signal transmitting apparatus and the broadcast signal receiving apparatus on a computer and a computer-readable recording medium on which the program is recorded also fall within the scope of the present invention.
[Explanation of Related Embodiment III]
Embodiments 19 to 25 will be described below.

[Background Technology of Embodiments 19 to 25]
In recent years, research and development of video technology, etc. that contributes to a dramatic increase in image quality that surpasses high-definition television broadcasting (HDTV) has progressed rapidly, and ultra-high-definition television broadcasting (UHDTV) that supports 4K / 8K. ) Is expected to be realized. For this reason, the UHDTV standard is being developed. Note that 4K UHDTV has a pixel count of 3840 horizontal x 2160 vertical = 8,294,400, which is four times that of a conventional full HDTV (horizontal 1920 x vertical 1080 = 2,073,600). In addition, 8K UHDTV has the number of pixels of 7680 × 4320 = 33,177,600, which is 16 times that of the full HDTV.

[Problems to be Solved by the Inventions of Embodiments 19 to 25]
The UHDTV standard is compatible with 22.2 ch stereo sound system. In addition, the UHDTV needs to support various audio formats used in conventional TV broadcasting such as the HDTV. In addition, the broadcasting service and the communication service are linked to each other. For this reason, it is necessary to support various audio formats used in the communication service.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a transmission device, a reception device, and the like that allow a receiver to quickly acquire attribute information related to the audio data. There is.

[Effects of Inventions in Embodiments 19 to 25]
According to one aspect of the invention according to Embodiments 19 to 25, a receiving apparatus that supports hybrid cast causes attribute data related to the audio data to be acquired without decoding the audio data of the received content and analyzing the header. be able to.

[Mode for Carrying Out the Invention]
[Embodiment 19]
Hereinafter, the nineteenth embodiment of the present invention will be described in detail with reference to FIGS. First, the configuration of the broadcast signal transmission system according to the present embodiment will be described with reference to FIG. FIG. 29 is a block diagram illustrating an example of a main configuration of a transmitter (transmission device, control information generation device) 1c included in the broadcast signal transmission system 5c.

The broadcast signal transmission system 5c is a system for transmitting a video signal and an audio signal (hereinafter abbreviated as “video signal etc.”) from the transmitter 1c to the receiver (receiving device) 2c. The broadcast signal transmission system 5c causes the receiver 2 to acquire attribute information regarding the audio of the content transmitted via the broadcast path via the communication path. In the next-generation 4K / 8K broadcasting, it is considered that signals are transmitted in the MMT (MPEG Media Transport) format. Therefore, in this embodiment, an example in which a video signal is transmitted in the MMT format will be described.

The transmitter 1c transmits content in the form of a video signal or the like. More specifically, the transmitter 1c transmits each packet (MMTP packet: MMT Protocol packet) constituting the content via a broadcast path (broadcast transmission path). One receiver 2c has a function of receiving this content (content distributed via a broadcast route) and receives content distributed via a communication route (communication transmission route) via a communication network such as the Internet, for example. It also has functions. And the receiver 2c can reproduce | regenerate combining each content received via these two paths | routes. In the figure, only one receiver 2c is shown, but the transmitter 1c broadcasts content to a plurality of receivers 2.

[Configuration of transmitter]
As illustrated, the transmitter 1c includes an audio encoder 10c, a video encoder 11c, a multiplexing unit 12c, an encryption unit 13c, a transmission unit (control information transmission unit) 14c, a control unit 15c, and a communication I / F 16c. Yes. The control unit 15c includes an encoding control unit 151c, an audio attribute acquisition unit (attribute acquisition unit) 152c, an audio attribute notification unit (attribute information transmission unit) 153c, and a control information generation unit (control information generation unit) 154c. It is.

The audio encoder 10 c encodes (encodes) the audio (sound) stream of the content transmitted by the transmitter 1 c and outputs it to the multiplexing unit 12. Similarly, the video encoder 11c encodes (encodes) a video (video) stream of content transmitted by the transmitter 1c and outputs the encoded video (video) stream to the multiplexing unit 12c.

The multiplexing unit 12c multiplexes the audio stream output from the audio encoder 10c, the video stream output from the video encoder 11c, and the control information output from the control unit 15c, and outputs the multiplexed information to the encryption unit 13c.

The encryption unit 13c encrypts the multiplexed stream output from the multiplexing unit 12c and outputs the encrypted stream to the transmission unit 14c. Then, the transmission unit 14c transmits the encrypted data output from the encryption unit 13c as a packet to the receiver 2 through the broadcast path in the form of a digital broadcast signal.

The control unit 15c controls each unit included in the transmitter 1c. Specifically, the encoding control unit 151c included in the control unit 15c controls the audio encoder 10c and the video encoder 11c to perform encoding.

The audio attribute acquisition unit 152c acquires audio attribute information that is attribute information related to the audio of the content transmitted by the transmitter 1c. The voice attribute acquisition unit 152c outputs the acquired voice attribute information to the voice attribute notification unit 153c. When the content of the voice attribute information is changed, the voice attribute acquisition unit 152c may output the change of the voice attribute information and the voice attribute information to the control information generation unit 154c.

Examples of audio attribute information include the audio format, the number of audio channels, the number of subwoofer (SW) channels, the form and channel of simulcast, the sampling rate, the number of quantization bits, and the like. Among these, the audio format, the number of audio channels, the number of subwoofer (SW) channels, the sampling rate, and the number of quantization bits can be acquired from the encoding control unit 151c. On the other hand, the form and channel of simulcast can be acquired from an external server (not shown) that provides detailed information of the content (program) transmitted (broadcast) by the transmitter 1c. Details of the audio attribute information will be described later.

The voice attribute notification unit 153c notifies the receiver 2 of the voice attribute information acquired by the voice attribute acquisition unit 152c. Specifically, the voice attribute notification unit 153c transmits the voice attribute information to the receiver 2c via the communication I / F 16c using the communication path in response to a request from the receiver 2c.

The control information generation unit 154c generates control information for the receiver 2 to reproduce the content transmitted by the transmitter 1c. This control information is called MMT-SI (Service Information) in MMT, and includes various pieces of information related to content. Here, in MMT-SI, a program executed during output of content video The description will focus on the generation of AIT (Application Information Table) in which information related to (software) is described.

Thus, in the transmitter 1c, the voice attribute acquisition unit 152c executes a process of acquiring voice attribute information (voice attribute acquisition step). The control information generation unit 154c generates control information (AIT) for acquiring the audio attribute information with reference to the conversion from the audio stream and the video stream to the MMTP packet in the multiplexing unit 12c. (Control information generation step) is executed. And the transmission part 14c performs the process (control information transmission step) which transmits the said control information to the receiver 2c via a broadcast path. The voice attribute notification unit 153c executes a process (voice attribute transmission step) in which the voice attribute information is transmitted via the communication path to the receiver 2c that requests transmission of the voice attribute information according to the control information.

Therefore, in the receiver 2 that has received this AIT, the content received on the broadcast path together with the AIT is subjected to appropriate processing according to the audio attribute information and output as audio, or the receiver 2 converts the content into audio data of the content. It is possible to notify a caution indicating that it is not compatible.

When the content transmitted by the transmitter 1c is switched, the audio attribute acquisition unit 152c acquires the audio attribute information of the content after switching, and the audio attribute notification unit 153c receives the newly acquired audio attribute information as a receiver. To 2c. In this way, by transmitting different audio attribute information following the change of the content, it is possible to always reproduce the content by an optimal process. Note that, as in the above example, the audio attribute information to be transmitted to the receiver 2 via the communication path may be switched without rewriting the AIT, or after the change of the audio attribute information to be transmitted, The AIT may be rewritten so that the audio attribute information is acquired by the receiver 2.

[Configuration of receiver]
Next, the configuration of the receiver 2c will be described with reference to FIG. FIG. 30 is a block diagram illustrating an example of a main configuration of the receiver 2c. As shown, the receiver 2 includes a tuner 20c, a communication I / F 21c, a decoding unit 22c, a demultiplexing unit 23c, an audio decoder (audio processing changing unit) 24c, a video decoder 25c, a display control unit 27c, a display 28c, An input unit 29c, a control unit 30c, an audio output control unit 31c, and a speaker 32c are provided. The control unit 30c includes a decoding control unit 301c, a demultiplexing control unit 302c, a control information acquisition unit (303c, an application control unit 304c, an audio attribute information acquisition unit (determination unit) 305c, and a selection unit (audio processing change). Part, switching part, selection part) 306c.

The tuner 20c receives the content transmitted as a digital broadcast signal through the broadcast path, and outputs it to the decoding unit 22c. On the other hand, the communication I / F 21c receives the content transmitted through the communication path and outputs it to the decryption unit 22c (the arrow in the figure is omitted). That is, the receiver 2c is a receiving device that supports hybrid casting using both a broadcast path and a communication path.

Further, the communication I / F 21c receives voice attribute information transmitted through the communication path, and outputs the voice attribute information to the control unit 30c.

When the content received via the tuner 20c and the communication I / F 21c is encrypted, the decryption unit 22c decrypts the content and outputs it to the demultiplexing unit 23c.

The demultiplexing unit 23c demultiplexes the data output from the decryption unit 22c (encrypted but decrypted). Then, each component (component) of the content obtained by demultiplexing is processed according to the type of the component. Specifically, the demultiplexing unit 23c outputs an audio component to the audio decoder 24c, outputs a video component to the video decoder 25c, and outputs control information to the control information acquisition unit 303c.

The audio decoder 24c changes the decoding setting based on the audio attribute information notified from the control unit 30c. The audio decoder 24c decodes the audio component output from the demultiplexer 23c and outputs audio data with the above decoding settings. Similarly, the video decoder 25 decodes the video component output from the demultiplexing unit 23c and outputs video data.

The display control unit 27c performs control to display the video data on the display 28c. The display 28c displays video data according to the control of the display control unit 27c. On the other hand, the audio output control unit 31c performs control to output audio data from the speaker 32c. The speaker 32c outputs audio data as audio in accordance with the control of the audio output control unit 31c. That is, the receiver 2c is a television receiver having a function for receiving broadcast content and a function for reproducing (displaying and outputting sound). The display 28c and the speaker 32c may be external devices externally attached to the receiver 2c.

The input unit 29c is an input device that receives a user operation on the receiver 2c and notifies the control unit 30c of the contents of the operation. The input unit 29c may be a receiving unit that receives a signal indicating the content of a user operation, which is transmitted, for example, by infrared rays.

The control unit 30c controls each unit included in the receiver 2c according to the control information received from the transmitter 1c. Specifically, the decryption control unit 301c controls the decryption unit 22c to decrypt the content. Also, the demultiplexing control unit 302c controls the demultiplexing unit 23c to perform demultiplexing of content.

The control information acquisition unit 303c acquires the control information output by the demultiplexing unit 23c demultiplexing, and outputs the AIT included in the control information to the application control unit 304c. Then, the application control unit 304c controls operations of various application software (hereinafter referred to as applications) in accordance with the AIT output by the control information acquisition unit 303c. Specifically, the application control unit 304c performs control to activate and terminate the activation of the voice attribute information acquisition unit 305c and the selection unit 306c.

The voice attribute information acquisition unit 305c and the selection unit 306c have their functions realized by an application. The audio attribute information acquisition unit 305c acquires audio attribute information from the transmitter 1c via the communication I / F 21c and transmits the audio attribute information to the selection unit 306c and the audio decoder 24c. The selection unit 306c receives a user operation for switching voice data, and switches the voice data in accordance with the user operation.

[Acquisition of AIT and voice attribute information]
Next, acquisition of AIT and audio attribute information will be described with reference to FIG. FIG. 31 is a diagram illustrating an AIT transmitted together with a broadcast signal (transmission signal) and an application activation example according to the AIT.

(A) of the figure shows an example in which one application (speech attribute information acquisition unit 305) is activated according to the AIT. As shown in the figure, the AIT is transmitted together with the broadcast signal, and the AIT of the service is periodically transmitted while the tuning of the same service is maintained.

Here, the AIT transmitted by the transmitter 1c includes a description indicating that the voice attribute information acquisition unit 305c is automatically started. The receiver 2c that has received this AIT receives the voice attribute information according to this description. The acquisition unit 305c is activated. The activated voice attribute information acquisition unit 305c requests the transmitter 1c to transmit voice attribute information via the communication I / F 21c and the communication path based on the AIT. The voice attribute notification unit 153c of the transmitter 1c transmits voice attribute information to the transmitter 1c through a communication path in response to a request from the receiver 2c. The voice attribute information acquisition unit 305c receives the voice attribute information via the communication I / F 21c. The audio attribute information acquisition unit 305c transmits the audio attribute information to the audio decoder 24c. Thereafter, the activation of the voice attribute information acquisition unit 305c is terminated. Note that the acquisition destination (sender 1c) of the voice attribute information may be described in the AIT in a format such as a URL (Uniform Resource Locator), for example.

In this embodiment, the audio attribute information acquisition unit 305c determines whether or not the receiver 2c can reproduce audio from the audio component of the content received through the broadcast path based on the audio attribute information acquired through the communication path. Determine whether. Since this determination can be made before the audio decoder 24c decodes the audio component, it can be made more quickly than in the past.

On the other hand, (b) of the figure shows an example in which two applications (speech attribute information acquisition unit 305c and selection unit 306c) are activated in accordance with AIT. Also in this example, the AIT transmitted by the transmitter 1c includes a description indicating that the voice attribute information acquisition unit 305c is automatically activated, and the receiver 2c that has received this AIT receives the voice according to this description. The attribute information acquisition unit 305c is activated.

In this example, when the voice attribute information is acquired by the started voice attribute information acquisition unit 305c, the selection unit 306c is started according to the AIT. And the user operation which switches audio | voice data is received by the activated selection part 306c. When the user operation is input via the input unit 29c, switching of audio data is executed according to the user operation. Thereafter, the activation of the voice attribute information acquisition unit 305c and the selection unit 306c is terminated.

Here, generally, in television broadcasting, the format (format or number of channels, etc.) of audio data to be broadcast can change. In order to deal with such a case, the voice attribute notification unit 153c of the transmitter 1 updates the voice attribute information to be notified to one corresponding to new voice data. Further, the control information generation unit 154c updates the generated AIT and the version information of the AIT. Then, the application control unit 304c of the receiver 2 activates the voice attribute information acquisition unit 305c periodically (for example, when a new AIT is received or when the AIT version changes), and again the voice attribute information To get. The audio attribute information acquisition unit 305 transmits new audio attribute information to the audio decoder 24c. As a result, it is possible to perform appropriate processing according to a change in sound.

FIG. 3 is a diagram showing a specific example of the audio attribute information in a table format. The audio attribute information includes the number of audio channels (CH1), the number of subwoofer (SW) channels (CH2), the audio format (Format), the audio sampling frequency (Sampl_freq), the audio quantization bit rate (Bit_rate), and The simulcast mode (Simul) and the channel (Simul_CH) are coded and stored in order.

The broadcast signal transmission system 5c of this embodiment corresponds to an ultra-high-detail television broadcasting system. Therefore, in the example of FIG. 3, the audio format (Format) includes PCM (Pulse Code Modulation), MPEG2 (Moving Picture Experts Group Group 2) -AAC (Advanced Audio Coding), MPEG4-AAC, MPEG2-AC3 (Audio Code number 3), etc., and each is assigned to a 4-bit code. Also, in order to support 22.2 ch three-dimensional sound, the number of audio channels (CH1) is in the range of 0 to 24, and each is assigned to a 5-bit code, and the number of SW channels (CH2) Are in the range of 0-2, each assigned to a 2-bit code. Further, there are 16, 22.05, 24, 32, 44.1, 48, 96, 192, and the like as audio sampling frequencies (kHz), and each is assigned to a 4-bit code. In addition, there are 8, 10, 16, 24, 32, and the like as quantization bit numbers (bits) of speech, and each is assigned to a 3-bit code. These indicate attribute information about audio data broadcast from the transmitter 1.

By the way, simultaneous broadcasting means that one broadcasting station broadcasts the same program in different channels (frequency bands), different broadcasting systems, or different broadcasting media in the same time zone. In the example of FIG. 3, the forms of simulcast (simul) include terrestrial digital broadcast, BS (Broadcasting （Satellite) digital broadcast, CS (Communications インターネット Satellite) digital broadcast, the Internet, etc., each assigned to a 4-bit code. ing. The simulcast channel (Simul_CH) includes 1ch to 1000ch, and each is assigned to a 12-bit code. The form of simulcast (Simul) and the channel of simulcast (Simul_CH) indicate the form and channel for simulcast related to the broadcast of the transmitter 1. Although not shown, the audio attribute information includes the number of audio channels (CH1), the number of subwoofer (SW) channels (CH2), the audio format (Format), the audio sampling frequency (Sampl_freq), And the number of audio quantization bits (Bit_rate) and the like. In addition, when there are a plurality of simulcasts related to the broadcast of the transmitter 1c, the audio attribute information may include the attribute information for a plurality of simulcasts. When audio attribute information is transmitted to the receiver 2 through a communication path such as the Internet, a large amount of data can be transmitted. Therefore, for example, not only broadcast of the transmitter 1c but also attribute information necessary for reproduction such as an audio format of simulcast can be included in the audio attribute information. Further, the transmitter 1c may transmit to the receiver 2 audio data itself having an attribute such as an audio format different from the audio data to be broadcast, together with the audio attribute information on the communication path. The receiver 2c can selectively reproduce the audio data transmitted through the communication path. Note that one-segment broadcasting, radio broadcasting, or the like may be used as simultaneous broadcasting.

[Receiver processing for audio attribute information]
Next, processing of the receiver 2c regarding the audio attribute information will be described with reference to FIG. FIG. 32 is a flowchart illustrating an example of processing executed by the control unit 30c of the receiver 2c regarding audio attribute information.

First, the voice attribute information acquisition unit 305c of the control unit 30c acquires voice attribute information from the transmitter 1c specified by the AIT through a communication path (S91). The acquired audio attribute information may include attribute information related to audio data being simulcast by another transmitter, in addition to attribute information related to audio data broadcast by the transmitter 1c.

Next, the audio attribute information acquisition unit 305c extracts the audio format of the audio data broadcast by the transmitter 1c from the acquired audio attribute information, and the extracted audio format can be decoded by the audio decoder 24c of the receiver 2. It is determined whether it is a thing (S92). If decoding is possible (YES in S92), the audio attribute information acquisition unit 305c extracts the number of audio channels of audio data broadcast by the transmitter 1c from the audio attribute information, and the extracted audio channel number is audio. It is determined whether or not the decoder 24c can decode (S93). If decoding is possible (YES in S93), the audio attribute information acquisition unit 305c transmits the audio attribute information to the audio decoder 24c, and decodes the audio data based on the audio attribute information. 24c is instructed (S94), and the process is terminated.

On the other hand, if the audio format cannot be decoded by audio decoder 24c (NO in S92), or if the number of audio channels cannot be decoded by audio decoder 24c (NO in S93), audio attributes The information acquisition unit 305c acquires the form of simulcast, the channel, the audio format, and the number of audio channels from the acquired audio attribute information (S95). The audio attribute information acquisition unit 305c determines whether there is a simulcast that can be decoded by the audio decoder 24c of the receiver 2 (S96). When there is a simulcast that can be decoded by the audio decoder 24c of the receiver 2c (YES in S96), the audio attribute information acquisition unit 305c controls the tuner 20c to switch to the simulcast and receive (S97). ). The audio attribute information acquisition unit 305c instructs the audio decoder 24c to decode audio data based on the switched audio attribute information of the simulcast (S94), and ends the process.

On the other hand, when there is no simulcast that can be decoded by the audio decoder 24c of the receiver 2c (NO in S96), the audio attribute information acquisition unit 305c displays a caution indicating that the audio data is not supported on the display 28c. Thus, the display control unit 27c is instructed (S98), and the process is terminated.

When the receiver 2c includes two tuners 20c, two decoding units 22c, and two demultiplexing units 23c, the video component broadcasted by the transmitter 1c is decoded by the video decoder 25c, and the audio component of simulcasting is converted by the audio decoder 24c. You may decode with. In this way, only audio can be switched to simulcast. When the receiver 2c cannot simultaneously reproduce a plurality of broadcasts, the receiver 2c switches from the broadcast of the transmitter 1c to the simulcast for both the audio and the video.

In the flowchart shown in FIG. 32, it is determined whether or not the audio format and the number of audio channels in the audio attribute information can be decoded, but the audio channel information such as the SW channel number, sampling frequency, quantization bit number, etc. It may be determined whether other information necessary for reproduction of each can be decoded. In this case, steps S92 and S93 shown in FIG. 32 may be changed to the following processing.

That is, the audio attribute information acquisition unit 305c extracts various types of information necessary for reproducing the received audio from the acquired audio attribute information, and all the extracted information can be decoded by the audio decoder 24c of the receiver 2c. It is determined whether it is a thing (S92 ′). If it can be decoded (YES in S92 '), the process proceeds to step S94. On the other hand, if it cannot be decoded (NO in S92 '), the process proceeds to step S95.

[Synchronize with content]
As described above, the transmitter 1c transmits the content through the broadcast path and transmits the audio attribute information of the content through the communication path. Then, the receiver 2c reproduces the audio data of the content transmitted through the broadcast path based on the audio attribute information received through the communication path. As described above, when audio attribute information is transmitted through a route different from the content, a mechanism for changing the audio attribute information to be applied in synchronization with switching of the audio attribute of the content with high accuracy is required.

For example, as shown in FIG. 33, by transmitting timing designation information that defines the timing at which the audio attribute changes with a clock (PCR: Program Clock Reference) from the transmitter 1 to the receiver 2 through the communication path, The voice attribute information to be applied can be changed at the timing at which the voice attribute is switched. FIG. 33 is a diagram illustrating an example of timing designation information and changes in audio attributes in accordance with the timing designation information. Note that PCR is time information used for synchronizing broadcast content and communication content in hybrid cast broadcasting.

In the example of FIG. 33, the audio attribute of the content at the timing of PCR (1) is audio (1). When this becomes PCR (2), it becomes audio (2), and when it becomes PCR (3), audio (3 ). Such a change in voice attribute can be expressed as timing designation information in which a PCR and a voice attribute at that time (voice attribute information) are associated with each other, as shown in the upper left of FIG.

Note that such timing designation information indicates the timing at which the audio attribute changes and what audio attribute to be changed after, based on the broadcast schedule of the content, advertising content broadcast in the middle of the content, etc. It can be generated by acquiring in advance in the transmitter 1c.

Then, in the receiver 2 that has received such timing designation information, the voice attribute information acquisition unit 305c notifies the audio decoder 24c of the voice attribute information associated with the timing at the timing indicated by the timing designation information. . As a result, it is possible to process audio having different attributes at the timing indicated by the timing designation information.

[Embodiment 20]
Embodiment 20 of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted. The block configurations of the broadcast signal transmission system 5c, the transmitter 1c, and the receiver 2c are the same as those shown in FIGS.

In the present embodiment, a mode in which the user selects a sound to be reproduced from a plurality of sounds included in the broadcast of the transmitter 1c and the simulcast will be described. For example, the audio component included in the broadcast of the transmitter 1c has an audio channel number of 22.1ch and an audio format of MPEG2-AC3. The audio component included in the simulcast has an audio channel number of 5.1 ch and an audio format of LPCM (Linear PCM).

On the other hand, the receiver 2c can support a plurality of sets of audio formats and the number of channels. In the present embodiment, of the plurality of audio components included in the broadcast and simulcast of the transmitter 1c, information that can be handled by the audio decoder 24 is displayed on the display 28c, and audio is selected for the audio component selected by the user. The decoder 24 performs decoding. Thereby, a sound can be reproduced from a sound component desired by the user, and as a result, convenience for the user is improved.

When the user selects a voice attribute, in addition to the voice attribute information acquisition unit 305c, the selection unit 306c is activated, and the selection unit 306c accepts a user operation. For this reason, when accepting a user operation for selecting an audio attribute, a description for starting the selection unit 306c is included in the AIT.

First, the control information acquisition unit 303c extracts an AIT from the signal output from the demultiplexing unit 23c and outputs the AIT to the application control unit 304c. The application control unit 304c activates the voice attribute information acquisition unit 305c according to the AIT. The voice attribute information acquisition unit 305c causes the application control unit 304c to activate the selection unit 306c when the user selects a voice attribute.

The audio attribute information acquisition unit 305c determines whether or not these audio components can be decoded by the audio decoder 24 from the audio attribute information of the broadcast of the transmitter 1c and the simulcast included in the acquired audio attribute information. It has a function. The selection unit 306c creates selection image data for displaying the number of audio channels and the audio format for the audio component determined to be decodable. The selection unit 306c outputs the selection image data to the display control unit 27c. The display control unit 27c superimposes the selection image data on the video data from the video decoder 25 and causes the display 28c to display it.

FIG. 9 is a diagram showing an example of a screen on which the decoding selection image data is displayed on the display 28c. In the illustrated display screen, the number of audio channels related to a decodable audio component and a set of audio formats are displayed at the bottom, and various other information such as video of the video component is displayed in the remaining area. Note that the number of audio channels currently received and the audio format set may be highlighted with an arrow or a thick frame.

The selection unit 306c accepts selection of audio attributes (a set of audio channels and audio formats) by the user via the input unit 29c. When the user selects one of the sets displayed at the bottom, the selection unit 306c instructs the tuner 20c to switch the received broadcast so as to receive the broadcast including the audio component of the selected set. Then, the selection unit 306c instructs the display control unit 27c to return to the normal display screen that displays only the video of the video component.

Next, in the present embodiment, the processing of the receiver 2c regarding the voice attribute information will be described with reference to FIG. FIG. 34 is a flowchart illustrating an example of processing executed by the receiver 2c regarding audio attribute information. The processing shown in FIG. 34 is the same as the processing shown in FIG. 32 except that steps S111 to S113 are added.

In step S111, if the audio format can be decoded by the audio decoder 24c (YES in S92) and the number of audio channels can be decoded by the audio decoder 24c (YES in S93), The attribute information acquisition unit 305c determines whether there are a plurality of audio components that can be received and decoded. If there is one audio component that can be received and decoded (NO in S111), the process proceeds to step S94.

On the other hand, when there are a plurality of receivable and decodable audio components (YES in S111), audio attribute information acquisition unit 305c outputs audio attribute information to selection unit 306c. The selection unit 306c outputs the selection image data to the display control unit 27c, thereby displaying the set of the number of audio channels and the audio format of the audio component for each audio component (S112). Then, the selection unit 306c switches to the audio component of the set selected by the user among the plurality of audio components (S113). That is, the selection unit 306c instructs the tuner 20c to switch the received broadcast so as to receive the broadcast including the set of audio components selected by the user, and ends the process.

In the flowchart shown in FIG. 34, the processing in steps S92 and S93 may be changed to the processing in step S92 'as described above. In this case, if decoding is possible (YES in S92 '), the process may proceed to step S111 instead of step S94.

[Modification]
Note that this embodiment relates to a case where there are a plurality of audio components that can be decoded in a plurality of broadcasts of the same content. On the other hand, some audio decoders 24c can down-convert 22.2 ch audio components into 5.1 ch, 2 ch audio data, for example.

Therefore, the present embodiment can also be applied when there is an audio component that can be down-converted by the audio decoder 24c. In this case, the selection unit 306 displays image data such that the number of audio channels (for example, 22.2 ch, 5.1 ch, 2 ch, etc.) that can be selected by the user is displayed at the bottom on the display screen shown in FIG. What is necessary is just to instruct | indicate to the audio decoder 24c to output to the control part 27c and to output the audio | voice data of the channel number of the audio | voice which the user selected.

If there are multiple simulcasts that can be decoded (YES in S96), the processes of steps S112 and S113 may be additionally performed to allow the user to select the simulcast to be received.

[Embodiment 21]
Embodiment 21 of the present invention will be described below with reference to FIGS. 35 and 36. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

By the way, even if the audio data cannot be handled by the receiver 2c, the audio data may be supported by an external audio output device connected to the receiver 2c. Therefore, in the present embodiment, when the receiver 2c determines that the above case is satisfied based on the acquired audio attribute information, the audio data is not decoded and the audio data is directly converted into an audio output device ( Audio reproducing device) 6c. As a result, even if the audio data cannot be reproduced by the own device, it can be quickly reproduced and output by the external audio output device 6c.

FIG. 35 is a block diagram illustrating an example of a main configuration of the broadcast signal transmission system 5c according to the present embodiment. The broadcast signal transmission system 5c according to the present embodiment is different from the broadcast signal transmission system 5c shown in FIG. 29 in that an audio output device 6c that is communicably connected to the receiver 2c is added. The transmitter 1c is not shown. 35 is added with a switching unit (transfer unit) 33c and an audio output communication I / F (external attribute acquisition unit, transfer unit) 34c, compared to the receiver 2c shown in FIG. And the control unit 30c is provided with a voice attribute information acquisition unit (control information acquisition unit, determination unit, external attribute acquisition unit, transfer unit) 305ca instead of the voice attribute information acquisition unit 305c. Differently, other configurations are the same. In FIG. 35, some functional blocks are not shown.

The audio output device 6c outputs audio based on audio data received from the outside. The audio output device 6c includes functional blocks similar to the audio decoder 24c, audio output control unit 31c, speaker 32c, and audio output communication I / F 34c in the receiver 2c.

The switching unit 33c is provided between the demultiplexing unit 23c and the audio decoder 24c, and the output destination of the audio component from the demultiplexing unit 23c is set to one of the audio decoder 24c and the audio output communication I / F 34c. Switching is performed based on an instruction from the control unit 30c.

The voice output communication I / F 34c is for data communication with the external voice output device 6c. In the present embodiment, the audio output device 6c and the audio output communication I / F 34c output digital audio signals as they are, for example, SPDIF (Sony Philips Digital InterFace), ARC (Audio Return Channel), and the like. The bit stream output can be handled. The communication between the audio output device 6c and the audio output communication I / F 34c may be wired communication or wireless communication.

The voice attribute information acquisition unit 305ca has the following functions added to the voice attribute information acquisition unit 305c shown in FIG. 30, and other functions are the same. That is, the audio attribute information acquisition unit 305ca uses the audio attributes (the number of audio channels, the number of SW channels, the audio format, etc.) that can be supported (reproduced) by the audio output device 6c as external attribute information. / F34c has a function to acquire.

The voice attribute information acquisition unit 305ca has a function of instructing the switching unit 33c to switch based on the voice attribute information acquired from the transmitter 1c through the communication path and the external attribute information from the voice output communication I / F 34c. Have. Specifically, the audio attribute information acquisition unit 305ca has a case where the audio data from the demultiplexing unit 23c cannot be handled by the audio decoder 24c of the own device but can be handled by the audio output device 6c. The switching unit 33c is instructed to switch so that the audio data is output to the audio output communication I / F 34c. As a result, the audio data is output to the audio output device 6c as it is via the audio output communication I / F 34c. Note that, in cases other than the above, the audio attribute information acquisition unit 305ca instructs the switching unit 33c to switch so that the audio data is output to the audio decoder 24c.

Next, in the present embodiment, the processing of the receiver 2c regarding the audio attribute information will be described with reference to FIG. FIG. 36 is a flowchart illustrating an example of processing executed by the receiver 2c regarding audio attribute information. The process shown in FIG. 36 is the same as the process shown in FIG. 32 except that the processes of steps S101 and S102 are added.

In step S101, if the audio format cannot be decoded by the audio decoder 24c (NO in S92), or if the number of audio channels cannot be decoded by the audio decoder 24c (NO in S93), The audio attribute information acquisition unit 305ca refers to the external attribute information from the audio output device 6c via the audio output communication I / F 34c, and the audio output device 6c can handle the audio format and the number of audio channels. Determine whether. If the audio output device 6c cannot cope with the audio format and the number of audio channels (NO in S101), the process proceeds to step S95.

On the other hand, when the audio format and the number of audio channels can be handled by the audio output device 6c (YES in S101), the audio attribute information acquisition unit 305ca instructs the switching unit 33c to switch and performs demultiplexing. The audio data from the conversion unit 23c is transferred to the external audio output device 6c via the audio output communication I / F 34c in the form as it is (S102), and the processing is ended.

Note that, also in the flowchart shown in FIG. 36, the processing in steps S92 and S93 may be changed to the processing in step S92 'as described above. In this case, if decoding is impossible (NO in S92 '), the process may proceed to step S101 instead of step S95.

[Embodiment 22]
The following describes the twenty-second embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the twenty-first embodiment, the sound is output from either the speaker 32c of the receiver 2c or the sound output device 6c connected to the receiver 2c. However, the sound is output from both the speaker 32c and the sound output device 6c. May be output.

FIG. 39 is a block diagram illustrating an example of a main configuration of the receiver 2c of the broadcast signal transmission system 5c according to the present embodiment. Compared with the broadcast signal transmission system 5c shown in FIG. 35, the broadcast signal transmission system 5c according to the present embodiment includes two demultiplexing units 23ca and 23cb, and a selector 35c instead of the switching unit 33c. Unlike the provided points, the other configurations are the same.

The illustrated receiver 2c includes two tuners (not shown) and two decoding units (not shown). The receiver 2c receives content transmitted as a digital broadcast signal by one tuner, decodes the content by one decoding unit, and outputs it to the demultiplexing unit 23ca. Further, the receiver 2c receives the content of the simulcast of the content received by one tuner by the other tuner, decodes the content by the other decoding unit, and outputs it to the demultiplexing unit 23cb. The functions of the demultiplexing units 23ca and 23cb are the same as those of the demultiplexing unit 23c of the receiver 2c shown in FIG.

The selector 35c selects either an audio component output from the demultiplexing unit 23ca or an audio component output from the demultiplexing unit 23cb as an audio component to be output to the audio decoder 24c and the audio output communication I / F 34c. Further, switching is performed based on an instruction from the control unit 30c. That is, in the present embodiment, the audio component is output to both the audio decoder 24c and the audio output communication I / F 34c.

The control information acquisition unit 303c outputs the AIT extracted from the control information from the demultiplexing unit 23ca and / or 23cb to the application control unit 304c. The voice attribute information acquisition unit 305ca acquires the voice attribute information of the voice data output from the demultiplexing unit 23ca and the voice attribute information of the voice data output from the demultiplexing unit 23cb through the communication path according to the AIT. The voice attribute information acquisition unit 305ca has a function of issuing a switching instruction to the selector 35c based on the voice attribute information acquired through the communication path and the external attribute information from the voice output communication I / F 34.

Specific switching instruction to be performed from the voice attribute information acquisition unit 305ca to the selector 35c is as follows.

(Case 1)
When the audio data from the demultiplexer 23ca can be handled by the audio decoder 24c and the audio output device 6c, the audio data is output to the audio decoder 24c and the audio output communication I / F 34c to the selector 35c. Instruct switching.

(Case 2)
If the audio data from the demultiplexer 23ca cannot be handled by the audio decoder 24c and can be handled by the audio output device 6c, the audio data from the demultiplexer 23cb is sent to the audio decoder 24c. The selector 35c is instructed to switch so as to output the audio data from the demultiplexer 23ca to the audio output communication I / F 34c.

(Case 3)
When the audio data from the demultiplexer 23ca can be handled by the audio decoder 24c and cannot be handled by the audio output device 6c, the audio data from the demultiplexer 23ca is sent to the audio decoder 24c. The selector 35c is instructed to switch so as to output the audio data from the demultiplexer 23cb to the audio output communication I / F 34c.

Thereby, the receiver 2c can output audio from both the speaker 32c and the audio output device 6c.

[Embodiment 23]
A twenty-third embodiment of the present invention will be described with reference to FIGS. In addition, the same reference number is attached | subjected to the structure similar to the said embodiment, and the description is abbreviate | omitted. First, the outline | summary of the broadcast signal transmission system 500 of this embodiment is demonstrated based on FIG. FIG. 37 is a diagram showing a schematic configuration of the broadcast signal transmission system 500.

As shown in the figure, the broadcast signal transmission system 500 includes a transmitter 100, a receiver 200, a voice attribute information management server 300, and a terminal device (transmission device) 400. The broadcast signal transmission system 500 is a system that transmits a video signal and the like from the transmitter 100 to the receiver 200, similarly to the broadcast signal transmission system 5c of the above embodiment. The transmitter 100 and the audio attribute information management server 300 correspond to the same broadcast station.

In the broadcast signal transmission system 500, the terminal device 400 acquires audio attribute information from the audio attribute information management server 300, and transmits the acquired audio attribute information to the receiver 200. Note that the audio attribute information management server 300 is a server that manages audio attribute information of each content to be broadcast, and obtains audio attribute information corresponding to the content by accessing the server and notifying the content. Can do. The broadcast signal transmission system 500 can perform appropriate processing according to the audio attribute information on the content through such processing.

[Configuration of receiver and terminal device]
Next, the configuration of the receiver 200 and the terminal device 400 will be described with reference to FIG. FIG. 38 is a block diagram illustrating an example of a main configuration of the receiver 200 and the terminal device 400. The receiver 200 has substantially the same configuration as the receiver 2c of FIG. 30, but does not have a function of acquiring voice attribute information according to the AIT, and the voice attribute information acquisition unit 305c receives the voice attribute information from the terminal device 400. It differs in that it gets. In FIG. 38, only the speech attribute information acquisition unit 305c is shown as a block in the control unit 30, but the decoding control unit 301c, the demultiplexing control unit 302c, and the like in FIG. 30 are also included in the control unit 30c.

The terminal device 400 is used by a user of the receiver 200 and is a terminal device having a communication function with the receiver 200 and the voice attribute information management server 300. The terminal device 400 may be a general-purpose terminal device such as a smartphone or a tablet terminal. As illustrated, the terminal device 400 includes a communication I / F 40, a control unit 41, a display unit 42, and an input unit 43.

The communication I / F 40 is for the terminal device 400 to communicate with an external device, specifically, the receiver 200 and the voice attribute information management server 300 through a communication path. The communication I / F 40 may be a device that performs communication via a communication network such as the Internet. Note that a communication I / F for communicating with the receiver 200 and a communication I / F for communicating with the audio attribute information management server 300 may be provided separately.

The control unit 41 controls each unit of the terminal device 400 in an integrated manner, and includes a voice attribute acquisition unit (voice attribute acquisition unit) 411, a voice attribute notification unit (voice attribute transmission unit) 412, and a selection unit (selection unit). 413.

The voice attribute acquisition unit 411 acquires voice attribute information. Specifically, the audio attribute acquisition unit 411 acquires the audio attribute information of the content designated by the user (the content being broadcast and received by the receiver 200) from the audio attribute information management server 300. Then, the audio attribute acquisition unit 411 transmits the acquired audio attribute information to the selection unit 413. Note that the terminal device 400 may be configured not to select a voice. In this case, the selection unit 413 transmits the acquired voice attribute information to the voice attribute notification unit 412 and the voice attribute notification unit. 412 transmits the audio attribute information to the receiver 200.

The voice attribute notification unit 412 notifies the receiver 200 of the voice attribute and the voice attribute information determined by the selection unit 413 through the communication path (via the communication I / F 40). As described above, when the terminal device 400 does not select audio, the audio attribute notification unit 412 sends the audio attribute information acquired by the audio attribute acquisition unit 411 to the receiver 200 via the communication I / F 40. Notice.

The selection unit 413 displays the selection image data on the display unit 42 based on the audio attribute information acquired by the audio attribute acquisition unit 411. The selection image data is image data indicating a set of audio channels and audio formats of audio components that can be decoded by the receiver 2. Then, the simulcast corresponding to the audio selected according to the user operation is determined, and the determined simulcast is transmitted to the audio attribute notification unit 412. As a result, the simulcast is notified to the receiver 200.

Note that the control unit 41 of the terminal device 400 may acquire in advance information on attributes (the number of audio channels and the audio format) that can be decoded by the receiver 2c from the receiver 2c, or let the user input the information. Also good. Note that the audio attribute selection method in the selection unit 413 can be the same as that described in the twentieth embodiment.

The display unit 42 is a display device that displays an image according to the control of the control unit 41, and the input unit 43 is an input device that accepts a user input operation on the terminal device 400 and notifies the control unit 41 of the contents of the operation. . Here, an example of a touch panel in which the display surface of the display unit 42 and the input surface of the input unit 43 are integrally formed will be described, but the display unit 42 and the input unit 43 may be separate and independent devices. Good.

The voice attribute information acquisition unit 305c of the receiver 200 receives the voice attribute information and the selected voice attribute information via the communication I / F 21. The audio attribute information acquisition unit 305c instructs the tuner 20c to output the audio attribute information to the audio decoder 24c, or to switch to the simulcast corresponding to the selected audio attribute.

The functions of the audio attribute acquisition unit 411, the audio attribute notification unit 412, and the selection unit 413 may be provided as functions of an application that displays related information of the content being broadcast. In the terminal device 400, when the application is activated and the user selects content to be viewed on the receiver 200, the audio attribute acquisition unit 411, the audio attribute notification unit 412, and the selection unit 413 perform the above operation.

As described above, according to the broadcast signal transmission system 500 of the present embodiment, the user can select the attribute of audio reproduced by the receiver 200 using the terminal device 400. In this broadcast signal transmission system 500, the transmitter 100 does not need to perform processing for acquisition or transmission of audio attribute information. Therefore, the transmitter 100 is generally used in a conventional broadcasting station. It is also possible to apply the transmitter as it is.

In the broadcast signal transmission system 500, it is not necessary to provide the receiver 200 with a configuration for accepting a user operation for selecting an audio attribute, and a user who selects an audio attribute simply by installing an application on the terminal device 400. Can accept operations. Therefore, it is possible to easily realize voice attribute selection by the user without increasing the manufacturing cost of the receiver 200.

[Embodiment 24: Modification]
The transmitter 1c of the above embodiment has a function as a transmission device that transmits voice attribute information to the receiver 2c through a communication path, and a function as a control information generation device that generates an AIT for acquiring the voice attribute information. And a function as a broadcast signal transmitting apparatus for transmitting a digital broadcast signal through a broadcast path. However, a function similar to that of the transmitter 1c can be realized by a combination of a transmission device, a control information generation device, and a broadcast signal transmission device that are independent from each other. For example, even in a broadcast signal transmission system including a transmission device that transmits audio attribute information, a control information generation device that generates the AIT, and a broadcast signal transmission device that transmits a broadcast signal, the same as the transmitter 1c. Can be realized. Also, for example, the same function as the transmitter 1c can be realized by a combination of a transmission device that transmits audio attribute information and a device that has a function of generating the AIT and a function of transmitting a broadcast signal.

In each of the above embodiments, the example in which the content is transmitted through the broadcast path has been described. However, the content may be transmitted through the communication path. Further, the content transmitted through the broadcast route and the content transmitted through the communication route may be combined and reproduced.

[Embodiment 25: Implementation example by software]
Control blocks of transmitter 1c, receiver 2c, receiver 200, and terminal device 400 (in particular, control unit 15c, multiplexing unit 12c, encryption unit 13c, transmission unit 14c, decryption unit 22c, demultiplexing unit 23c, display The control unit 27c, the audio output control unit 31c, the control unit 30c, and the control unit 41) may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be a CPU (Central Processing Unit). ) May be implemented by software.

In the latter case, the transmitter 1c, the receiver 2c, the receiver 200, and the terminal device 400 are a CPU that executes instructions of a program that is software that realizes each function, and the program and various data are computers (or CPUs). A ROM (Read Only Memory) or a storage device (referred to as “recording medium”) recorded in a readable manner, a RAM (Random Access Memory) for developing the program, and the like are provided. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
The transmission device according to the nineteenth aspect of the present invention is a transmission device (transmitter 1c, terminal device 400) that transmits information to a reception device (receiver 2c) that supports hybrid casting using both a broadcast path and a communication path. Then, an attribute acquisition unit (audio attribute acquisition unit 152c, 411) that acquires attribute information related to audio of content transmitted to the receiving device via the broadcast path, and the attribute information is transmitted to the receiving device via the communication path. And an attribute information transmission unit (audio attribute notification units 153c and 412) for transmission.

According to the above configuration, the attribute information about the voice is transmitted to the receiving device through the communication path. Therefore, it is possible to cause the receiving device to quickly acquire the attribute of the audio data before decoding the audio data of the content received through the broadcast path. Therefore, according to the above configuration, it is possible to cause the receiving apparatus that has received the attribute information to output the content by performing appropriate processing according to the attribute information. In addition, it is possible to make the receiving device perform settings for decoding the audio data of the content more quickly than in the past.

In the transmission device according to aspect 20 of the present invention, in the aspect 19, the attribute information transmission unit transmits the audio of the content along the communication path along with the attribute information of the content transmitted through the broadcast path. It may be configured to transmit as audio data having an attribute different from that of audio.

According to the above configuration, the receiving device can select the audio to be reproduced from the audio data of the content transmitted through the broadcast path and the audio data transmitted through the communication path. Since the two audio data have different attributes, the receiving apparatus can reproduce the audio related to the content if it corresponds to any attribute. For this reason, it is possible to improve the situation in which audio cannot be reproduced because the audio decoder of the receiving apparatus does not support a specific attribute.

In the transmission device according to aspect 21 of the present invention, in the aspect 19 or 20, the attribute information transmission unit may transmit timing designation information indicating a timing at which the attribute information should be applied.

According to the above configuration, even if the audio attribute changes at a certain timing, the audio data can be processed according to the attribute information at the timing indicated by the timing designation information.

The control information generating apparatus according to the twenty-second aspect of the present invention is a control information generating apparatus (transmitter 1c) that generates control information related to reproduction of content transmitted to a receiving apparatus that supports hybrid casting using both a broadcast path and a communication path. 100), and a control information generation unit (control information generation unit 154c) that generates control information (AIT) for acquiring attribute information related to the audio of the content in the receiving device, and A control information transmitting unit (transmitting unit 14c) that transmits the control information to the receiving device;

According to the above configuration, since the control information for acquiring the attribute information related to the sound is generated and transmitted to the receiving device, the receiving device can promptly acquire the attribute information using the control information. Therefore, it is possible to cause the receiving apparatus to acquire the attribute of the audio data before decoding the audio data of the content received through the broadcast path. According to the above configuration, it is possible to cause the receiving device to output the audio by performing appropriate processing on the content according to the attribute information. In addition, it is possible to make the receiving device perform settings for decoding the audio data of the content more quickly than in the past.

In the control information generation device according to aspect 23 of the present invention, in the aspect 22, the control information transmission unit may transmit the control information together with the content as a digital broadcast signal to the reception device.

The receiving apparatus according to the twenty-fourth aspect of the present invention is a receiving apparatus that supports hybrid casting using both a broadcast path and a communication path, and acquires control information for acquiring attribute information related to audio of content to be played back. A control information acquisition unit; and an audio processing change unit that changes a process related to the audio of the content according to the attribute information acquired through the communication path according to the control information.

According to the above configuration, the receiving device acquires the attribute information related to voice through the communication path. The receiving device can quickly acquire the attribute of the audio data before decoding the audio data of the content received through the broadcast path. Therefore, the receiving apparatus can output the content by performing appropriate processing according to the attribute information and outputting the sound. In addition, the receiving apparatus can perform setting for decoding the audio data of the content more quickly than in the past.

In the receiving device according to aspect 25 of the present invention, in the above aspect 24, a configuration may be provided that includes a determination unit that determines whether the sound of the content can be reproduced by the own device based on the attribute information.

According to the above configuration, the receiving device can determine whether or not the audio data can be reproduced on its own device before decoding the audio data of the content, and as a result, the determination can be performed more quickly than before. It can be carried out.

In the receiving device according to aspect 26 of the present invention, in the above aspect 25, when it is determined that the sound of the content cannot be reproduced by the own device, the simulcast of the content is specified from the attribute information, and the own device A configuration may be provided that includes a switching unit that switches to the simulcast that can reproduce sound.

According to said structure, even if it is a case where an audio decoder does not respond | correspond to the audio | voice attribute of the content received from the transmitter, it can reproduce | regenerate the audio | voice of the same content by switching to simulcast. Become. Therefore, it is possible to improve the situation where sound cannot be reproduced.

In the receiving device according to aspect 27 of the present invention, in the aspects 24 to 26, the attribute information includes attribute information related to the sound of the simulcast of the content, and the audio is selected from a plurality of broadcasts including the simulcast. A configuration may be provided that includes a selection unit that allows the user to select a broadcast for reproducing the program.

According to the above configuration, the user can select a sound broadcast having a desired attribute from a plurality of broadcasts including a simulcast.

The television receiver according to aspect 28 of the present invention includes the receiving device according to any one of aspects 24 to 27.

A broadcast signal transmission system according to an aspect 29 of the present invention includes a broadcast signal transmission including a transmission device that transmits content to a reception device that supports hybrid casting using both a broadcast route and a communication route, and a reception device that receives the content. The transmission device transmits control information for acquiring attribute information related to audio of the content in the reception device together with the content to the reception device along the broadcast path, and the reception device The attribute information is acquired through the communication path according to the control information, and the processing related to the audio of the content is changed according to the attribute information.

In the broadcast signal transmission system according to aspect 30 of the present invention, in the aspect 29, the attribute information may include information necessary for reproducing the audio of the content.

In the broadcast signal transmission system according to aspect 31 of the present invention, in the

aspect

29 or 30, the attribute information may include information for specifying the simultaneous broadcast of the content.

The transmission device, the control information generation device, and the reception device according to each aspect of the present invention may be realized by a computer. In this case, each unit included in the transmission device, the control information generation device, or the reception device. A control program that causes the above-described transmission device, control information generation device, or reception device to be realized by a computer by operating as a computer, and a computer-readable recording medium that records the control program also fall within the scope of the present invention.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

In the present invention, the control information for reconstructing the content includes attribute information related to the audio component of the content, so that the audio component of the content can be read by the own device before the reconstructed content is played back. Since it can be determined whether or not it is reproducible, it can be applied to any broadcast signal transmission system that transmits the control information.

1 Transmitter (broadcast signal transmitter)
2 Receiver (Broadcast signal receiver)
5 Broadcast signal transmission system 6 Audio output device (audio playback device)
10 Audio encoder 11 Video encoder 12 Multiplexer (packet generator)
13 Encryption unit 14 Transmission unit 15 Control unit 16 Encoding control unit 17 Audio attribute acquisition unit (attribute acquisition unit)
18 Control information generator (packet generator)
20 Tuner 22 Decoding unit 23 Demultiplexing unit (reconstruction unit)
24 audio decoder 25 video decoder 26 superimposition unit 27 display control unit 28 display 29 control unit 30 audio output control unit 31 speaker 32 switching unit (transfer unit)
33 Communication interface for audio output (external attribute acquisition unit, transfer unit)
40 Decoding control unit 41 Demultiplexing control unit (reconstruction unit)
42 Control information acquisition unit (control information acquisition unit, determination unit)
42a Control information acquisition unit (control information acquisition unit, determination unit, external attribute acquisition unit, transfer unit)
42b Control information acquisition unit (control information acquisition unit, determination unit, selection unit)

Claims

A broadcast signal transmission device for transmitting a digital broadcast signal,
A packet generator for generating a plurality of MMT protocol packets obtained by converting content, and a MMT protocol packet including control information for reconstructing the content from the plurality of packets, as the digital broadcast signal;
An attribute acquisition unit that acquires attribute information related to the audio component of the content,
The broadcast signal transmitting apparatus, wherein the control information includes the attribute information.
A broadcast signal receiving apparatus for receiving a plurality of MMT protocol packets as a digital broadcast signal,
A control information acquisition unit that selects a packet including control information from the plurality of packets and acquires the control information;
A reconfiguration unit configured to reconfigure content from the plurality of packets based on the control information acquired by the control information acquisition unit,
The control information includes attribute information related to the audio component of the content,
A broadcast signal receiving apparatus, further comprising: a determination unit that determines whether or not sound can be reproduced from the sound component based on the attribute information extracted from the control information.
An external attribute acquisition unit that acquires attribute information of an audio component capable of reproducing audio by the audio reproduction device from an external audio reproduction device that is communicably connected to the own device;
The determination unit further determines whether audio can be reproduced from the audio component of the content on the audio reproduction device based on the attribute information acquired by the external attribute acquisition unit,
And a transfer unit configured to transfer the audio component reconfigured by the reconfiguration unit to the external audio reproduction device when the audio reproduction device can reproduce the audio component. 2. The broadcast signal receiving apparatus according to 2.
The content includes a plurality of audio components having the same content and different attribute information.
3. The apparatus according to claim 2, further comprising: a selection unit that allows a user to select one of the audio components when audio from the plurality of audio components can be reproduced by the own device as a result of the determination by the determination unit. Or the broadcast signal receiver of 3.
A television receiver comprising the broadcast signal receiving apparatus according to any one of claims 2 to 4.
A broadcast signal transmission system comprising the broadcast signal transmission device according to claim 1 and the broadcast signal reception device according to any one of claims 2 to 4.
The broadcast signal transmission system according to claim 6, wherein the attribute information is information necessary for reproducing audio from the audio component.
The broadcast signal transmission system according to claim 6 or 7, wherein the attribute information includes information for specifying a simulcast of the content.
A control program for causing a computer to function as the broadcast signal transmitting apparatus according to claim 1, wherein the control program causes the computer to function as each of the above-described units.
A control program for causing a computer to function as the broadcast signal receiving apparatus according to any one of claims 2 to 4, wherein the control program causes the computer to function as each unit.
A computer-readable recording medium on which the control program according to claim 9 or 10 is recorded.