JP6327711B2 - Receiving apparatus, broadcasting system, receiving method and program - Google Patents

Description

  The present invention relates to a receiving apparatus, a broadcasting system, a receiving method, and a program.

  As part of the advancement of broadcasting services, it has been considered to broadcast more playback methods of audio so that not only image quality but also high sound quality programs can be viewed. For example, a surround system (for example, 5.1 ch) that uses more audio channels than conventional monaural audio (1.0 ch (channel)) and stereo audio (2.0 ch) may be provided. Some television receivers can reproduce surround sound as it is, but there are other receivers that can reproduce only monaural sound or only monaural sound and stereo sound. A receiving device that does not support the surround system may perform a downmix process for converting surround sound into sound data having a smaller number of sound channels. Downmix processing is processing that distributes the audio data of the audio channel before conversion to one of the plurality of audio channels after conversion, or synthesizes (adds) the audio data of the plurality of audio channels before conversion. Including a process of generating audio data of the audio channel.

  In next-generation television broadcasting services such as 4K and 8K Ultra High Definition Television (UHDTV), audio from multiple different playback formats and audio in multiple languages can be sent to a single program. Simultaneous broadcasting, which is a broadcasting service, is planned.

JP 2008-48299 A

  However, a conventional receiving apparatus, for example, a broadcast receiving apparatus described in Patent Document 1, does not necessarily support all types of audio data. Therefore, it is conceivable to perform a downmix process on the received audio data and reproduce audio based on the generated audio data. The characteristics of the downmix process depend on the performance of the device that performs the process (for example, an (Integrated Circuit) IC chip). For this reason, problems such as the inability to realize selective listening or deletion of the audio of some audio channels (for example, the commentator's audio in sports broadcasting) and the deterioration of quality due to the addition of noise and distortion due to processing may occur. These problems are due to the fact that downmix processing in the receiving apparatus is not assumed at the program production stage. Further, the conventional receiving apparatus may once perform decoding processing on the audio data of all audio channels received regardless of the reproduction capability, and then perform a downmix process according to the reproduction capability. In particular, in a playback system with a large number of audio channels such as the surround system (22.2ch), a high level of decoding processing capability is required, and quality degradation due to complicated downmix processing becomes significant.

The present invention has been made to solve the above problems, and one aspect of the present invention is an audio asset that is included in an MMT package table separated from a received broadcast signal and transmits the same content in different audio modes. based on the simulcast group identification take the same value for a plurality of detecting the audio assets voice mode, the receiving apparatus to select one of the audio asset reproducible audio mode among the plurality of audio modes.

  ADVANTAGE OF THE INVENTION According to this invention, the audio | voice based on the audio | voice data of any system among the received audio | voice data of several systems can be reproduced | regenerated. Therefore, it is possible to reproduce the sound intended by the program producer without degrading the quality due to the synthesis process.

It is a block diagram which shows the structure of the broadcast system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the transmitter which concerns on 1st Embodiment. It is a figure which shows the example of MPT. It is a figure which shows the example of a MH-voice component descriptor. It is a figure which shows the example of a component classification. It is a figure which shows the example of a setting of MH-voice component descriptor. It is a block diagram which shows the structure of the receiver which concerns on 1st Embodiment. It is a block diagram which shows the structure of the control part which concerns on 1st Embodiment. It is a figure which shows the example of an audio | voice reproduction system table. It is a flowchart which shows the reception process which concerns on 1st Embodiment. It is a flowchart which shows the reproduction | regeneration system determination process which concerns on 1st Embodiment. It is a figure which shows the example of MH-EIT. It is a flowchart which shows the reception process which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the control part which concerns on 3rd Embodiment. It is a figure which shows the example of the system selection button which concerns on 3rd Embodiment. It is a flowchart which shows the reception process which concerns on 3rd Embodiment. It is a block diagram which shows the structure of the control part which concerns on 4th Embodiment. It is a flowchart which shows the reception process which concerns on 4th Embodiment. It is a block diagram which shows the structure of the control part which concerns on 5th Embodiment. It is a figure which shows the example of the system selection button which concerns on 5th Embodiment.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a broadcasting system 1 according to the present embodiment. The broadcast system 1 includes a transmission device 11 and a reception device 31. For example, the transmission device 11 constitutes broadcasting equipment of a broadcasting company. The reception device 31 receives a broadcast program broadcast from the transmission device 11, displays a video of the received broadcast program, and reproduces the sound of the broadcast program. The receiving device 31 is installed, for example, in each home or business office.

  The transmission device 11 transmits program data representing a broadcast program to the reception device 31 via the broadcast transmission path 12. The program data includes, for example, audio data and video data. The audio data is not limited to one type of audio data, and may include audio data of a plurality of playback methods at the same time. The reproduction method means the number of audio channels related to reproduction and the arrangement of speakers, and is sometimes called an audio mode. The reproduction system is, for example, stereo 2ch, surround 5.1ch, etc. A service that provides audio data of a plurality of reproduction methods as one program data is called simulcast. Simulcast is sometimes called simulcast. In the following description, the service itself or sound provided by the service may be referred to as simultaneous sound.

  The broadcast transmission path 12 is a transmission path for transmitting various data transmitted by the transmission apparatus 11 to an unspecified number of reception apparatuses 31 in one direction at the same time. The broadcast transmission path 12 is, for example, a radio wave (broadcast wave) in a predetermined frequency band that is relayed by the broadcast satellite 13. A part of the broadcast transmission path 12 may include a communication line, for example, a communication line from the transmission device 11 to a transmission facility for transmitting radio waves.

  The receiving device 31 displays the video of the program based on the program data received from the transmitting device 11 via the broadcast transmission path 12, and reproduces the audio of the program. The receiving device 31 detects the presence of a plurality of types of audio data, that is, simultaneous audio, from the received program data. In addition, the receiving device 31 includes a decoding unit that decodes audio data of at least one of a plurality of methods included in program data, and one of the methods that can be processed by the decoding unit among the plurality of methods. Select. The receiving device 31 is an electronic device having a function capable of receiving a television broadcast, such as a television receiving device or a video recording device.

(Configuration of transmitter)
Next, the configuration of the transmission device 11 according to the present embodiment will be described.
FIG. 2 is a block diagram illustrating a configuration of the transmission device 11 according to the present embodiment. The transmission apparatus 11 includes a program data generation unit 111, a configuration information generation unit 112, a multiplexing unit 113, an encryption unit 114, and a transmission unit 115.

  The program data generation unit 111 acquires video data indicating video composing a broadcast program and audio data indicating audio. The program data generation unit 111 acquires video data encoded by a predetermined video encoding method. The predetermined video encoding method is, for example, ISO / IEC 23008 HEVC (International Organization for Standardization / International Electrical Commission 23008 Part 2 High Efficient Video Coding, also referred to as E coding C). In addition, the program data generation unit 111 acquires audio data encoded by a predetermined audio encoding method. The predetermined audio encoding method is, for example, an audio encoding method defined by ISO / IEC 14496 Part 3 (also referred to as MPEG-4 audio). The program data generation unit 111 may acquire audio data of a plurality of playback methods simultaneously in one program. The program data generation unit 111 generates program data in a predetermined format from the acquired video data and audio data, and outputs the generated program data to the multiplexing unit 113. Program data in a predetermined format is, for example, MPU (Media Processing Unit) defined by ISO / IEC 23008 Part1 MMT (MPEG Media Transport, also simply referred to as MMT). Each MPU includes video data or audio data of a unit that can perform video and audio decoding processing.

  The configuration information generation unit 112 acquires configuration element information, which is information for configuring a broadcast program and a service provided along with the broadcast. The component information includes a list of assets that are components of broadcast programs and services, and information indicating their requirements, for example, information indicating whether a multi-view service exists in a program. An asset is element data that is a component of a program, for example, audio data of individual streams, video data, and the like. The configuration information generation unit 112 generates configuration information in a predetermined format from the acquired component element information, and outputs the generated configuration information to the multiplexing unit 113. The configuration information in the predetermined format is, for example, an MPT (MMT Package Table) that constitutes an MMT-SI (MMT-System Information). An example of MPT will be described later.

The multiplexing unit 113 multiplexes the program data input from the program data generation unit 111 and the acquired information input from the configuration information generation unit 112 to have a predetermined format (for example, a TLV (Type Length Value) packet). Generate multiplexed data. The multiplexing unit 113 outputs the generated multiplexed data to the encryption unit 114.
The encryption unit 114 encrypts the multiplexed data input from the multiplexing unit 113 using a predetermined encryption method (for example, AES (Advanced Encryption Standard)). The encryption unit 114 outputs the encrypted multiplexed data to the transmission unit 115.
The transmission unit 115 transmits the multiplexed data input from the encryption unit 114 to the reception device 31 via the broadcast transmission path 12. Here, the transmission unit 115 modulates a carrier wave having a predetermined carrier frequency with multiplexed data that is a baseband signal, and uses a antenna (not shown) to transmit a radio wave (broadcast wave) in a channel band corresponding to the carrier frequency. Radiate.

(MPT data structure)
Next, an example of MPT included in the configuration information will be described.
FIG. 3 is a diagram illustrating an example of MPT. In the example shown in FIG. 3, the MPT includes an MPT descriptor area (MPT_descriptors_byte) and an asset type (asset_type) for each asset. The MPT descriptor area (MPT_descriptors_byte) is an area in which an MPT descriptor is described. The configuration information generation unit 112 generates an MH-audio component descriptor (MH-Audio_Component_Descriptor ()). The MH-audio component descriptor (MH-Audio_Component_Descriptor ()) is a descriptor in which parameters relating to audio data constituting the program are described. When providing simultaneous audio, the configuration information generating unit 112 generates an MH-audio component descriptor (MH-Audio_Component_Descriptor ()) for each playback method. The configuration information generation unit 112 includes the generated MH-audio component descriptor (MH-Audio_Component_Descriptor ()) in the MPT descriptor area (MPT_descriptors_byte). In the asset type (asset_type), a code indicating the type of asset is described. The configuration information generation unit 112 describes, for example, hcv1 indicating video data encoded by HEVC and mp4a indicating audio data encoded by MPEG-4 audio as the asset type (asset_type).

(MH-Data structure of voice component descriptor)
Next, an example of the MH-voice component descriptor will be described.
FIG. 4 is a diagram illustrating an example of the MH-voice component descriptor. In the example illustrated in FIG. 4, the MH-audio component descriptor (MH-Audio_Component_Descriptor () includes a component type (component_type), a component tag (component_tag), a simulcast group identification (simulcast_group_tag), and a main component flag (main_gmp). The component type (component_type) describes a number indicating a reproduction method, and the component tag (component_tag) describes a number identifying a component stream of audio data of each reproduction method. simulcast_group_tag) has one The same number is described for the audio data belonging to the group of audio data to be subjected to the immalcast, but the specific code “0xFF” is described for the audio data not to be subjected to the simulcast. The configuration information generation unit 112 describes a number other than '0xFF' in the simulcast group identification (simulcast_group_tag), which is common among the playback methods. The configuration information generation unit 112 describes “0xFF” in the simulcast group identification (simulcast_group_tag) The main component flag (main_component_tag) is a flag indicating whether or not the audio data is the main audio. As voice Renewable reproduction method in the canal receiving apparatus, for example, be audio data of a single mono 1ch (mono 1 channel) is designated as the primary audio.

(Example of component type)
Next, the reproduction method described in the component type (component_type) will be described.
FIG. 5 is a diagram illustrating an example of component types. In FIG. 5, “0x01”, “0x02”, “0x03”, “0x09”, “0x0C”, and “0x11” are listed as numbers indicating the component types. '0x01', '0x02', '0x03', '0x09', '0x0C', and '0x11' are 1/0 mode, 1/0 + 1/0 mode, 2/0 mode, and 3/2. It is a value indicating 1 mode, 5 / 2.1 mode, 3/3 / 3-5 / 2 / 3-3-0 / 0.2 mode. Here, ... / ~ means that the arrangement of the reproduction speakers based on the listening point is ... (voice channel) in the front and ~ (voice channel) in the rear. The numerical value after the decimal point indicates the number of audio channels for reproducing low-frequency audio. The audio channel means a channel that is a reproduction unit of audio, and is distinguished from a broadcast channel indicating a frequency band of broadcast waves. Therefore, the 1/0 mode indicates single mono 1ch. The 1/0 + 1/0 mode indicates dual mono 1ch × 2. The 2/0 mode indicates stereo 2ch. The 3 / 2.1 mode indicates surround 5.1ch. The 5 / 2.1 mode indicates surround 7.1ch. The 3/3 / 3-5 / 2 / 3- 3/0 / 0.2 mode indicates surround 22.2ch. 3/3/3/5/2 / 3- 3/0 / 0.2 mode 3/3/3 means that three speakers are placed on the front, side and back of the upper layer with reference to the listening point. Indicates that “5/2/3” indicates that the number of speakers is 5, 2, 3 on the front, side, and rear of the middle layer with respect to the listening point. 3/0 / 0.2 indicates that there are 5, 0, and 2 speaker arrangements on the lower layer front, side, and rear, respectively, based on the listening point. However, the two channels behind the lower layer are channels for reproducing low-frequency sound.

(Example of setting MH-voice component descriptor)
Next, taking as an example a case in which simulative audio composed of audio A1, A1 + 1, A2, A5.1, A7.1, and A22.2 of six playback methods is provided, each component group by the configuration information generation unit 112 is provided. A setting example will be described.
FIG. 6 is a diagram illustrating a setting example of the MH-voice component descriptor. In the example shown in the first column of FIG. 6, a common number '0x01' is set as the simulcast group identification (simulcast_group_tag) for the voices A1, A1 + 1, A2, A5.1, A7.1, and A22.2. . This setting indicates that simulative audio is provided by these six playback methods. In the second column, different component tags (component_tag) '0x10', '0x11', '0x12', '0x13', and '0x14' for voices A1, A1 + 1, A2, A5.1, A7.1, and A22.2. ',' 0x15 'is set. With this setting, each audio data is identified. In the third column, different component types (component_type) '0x01', '0x02', '0x03', '0x09', and '0x0C' for voices A1, A1 + 1, A2, A5.1, A7.1, and A22.2. ',' 0x11 'is set. In this setting, the playback methods of audio A1, A1 + 1, A2, A5.1, A7.1, A22.2 are single mono 1ch, dual mono 1ch × 2, stereo 2ch, surround 5ch, surround 7.1ch, surround, respectively. Indicates 22.2 ch. In the fourth column, the main component flag (main_component_flag) is “1” for the voice A1, and the main component flag (main_component_flag) is “0” for the voices A1 + 1, A2, A5.1, A7.1, and A22.2. Indicates that there is. This setting indicates that the voice A1 is the main voice and the voices A1 + 1, A2, A5.1, A7.1, and A22.2 are all sub voices.

(Receiver configuration)
Next, the configuration of the receiving device 31 will be described.
FIG. 7 is a block diagram illustrating a configuration of the receiving device 31 according to the present embodiment. The receiving device 31 includes a receiving unit 311 (tuner), a decoding unit 312, a separation unit 313, an audio decoding unit 314, a loudspeaker 315, a video decoding unit 316, a GUI synthesis unit 317, a display unit 318, a storage unit 322, and an operation input unit. 323 and a control unit 331.

The receiving unit 311 receives the broadcast wave transmitted from the transmission device 11 via the broadcast transmission path 12. The receiving unit 311 specifies a broadcast channel band corresponding to the broadcast channel specified by the broadcast channel signal input from the control unit 331. The receiving unit 311 demodulates the received signal of the broadcast channel band received as a broadcast wave into multiplexed data that is a baseband signal. The receiving unit 311 outputs the demodulated multiplexed data to the decoding unit 312.
The decryption unit 312 decrypts the multiplexed data (encrypted) input from the reception unit 311 with a decryption method (for example, AES) corresponding to the method used by the encryption unit 114 of the transmission device 11. The decoded multiplexed data is generated. The decoding unit 312 outputs the generated multiplexed data to the separation unit 313.

  The separation unit 313 separates the multiplexed data input from the decoding unit 312 into program data and configuration information. The separation unit 313 outputs the configuration information to the control unit 331. Further, the separation unit 313 extracts audio data and video data from the program data. The separation unit 313 outputs the extracted audio data to the audio decoding unit 314 and outputs the video data to the video decoding unit 316.

The audio decoding unit 314 decodes the audio data input from the separation unit 313 by a decoding method corresponding to the encoding method (for example, MPEG-4 audio) used for encoding, and generates original audio data. . The decoded audio data is data indicating the audio level at each time. When simultaneous audio is provided, audio data of a plurality of reproduction methods may be input to the audio decoding unit 314 and a method selection signal may be input from the control unit 331. The system selection signal is a signal for instructing any one of a plurality of playback system sounds. The audio decoding unit 314 decodes audio data related to the reproduction method specified by the method selection signal, which is a reproduction method having its own processing capability among audio data of a plurality of predetermined reproduction methods, Generate audio data. The voice decoding unit 314 outputs the decoded original voice data to the loudspeaker 315. Therefore, when simulcast is provided, the sound of the reproduction method specified by the method selection signal is reproduced by the loudspeaker 315. When the method selection signal is not input, the speech decoding unit 314 outputs the original speech data related to the main speech to the loudspeaker 315.
The loudspeaker 315 reproduces voice based on the voice data input from the voice decoder 314. The loudspeaker 315 includes, for example, a speaker. The loudspeaker 315 includes at least a number of speakers corresponding to a predetermined number of channels. The predetermined number of channels corresponds to the number of channels specified by a reproduction method capable of processing audio data in the audio decoding unit 314.

The video decoding unit 316 decodes the video data input from the separation unit 313 using the decoding method corresponding to the encoding method (for example, HEVC) used for encoding, and the original video data Is generated. The decoded video data is data indicating signal values forming a video (frame image) at each time. The video decoding unit 316 outputs the decoded video data to the GUI synthesis unit 317.
A GUI (Graphical User Interface) combining unit 317 combines the video data input from the video decoding unit 316 and various GUI screen data input from the control unit 331 to generate video data indicating a display video. To do. The GUI screen data includes, for example, channel selection screen data for selecting broadcast channels, electronic program guide (EPG) data, and the like.
The display unit 318 reproduces a video based on the video data input from the GUI synthesis unit 317. Therefore, on the display unit 318, the GUI screen is displayed superimposed on the video related to the received video data. The display unit 318 includes a display, for example.

The storage unit 322 stores various data. The storage unit 322 includes a storage medium, for example, an HDD (Hard-disk Drive), a flash memory, a ROM (Read-only Memory), a RAM (Random Access Memory), or a combination thereof.
The operation input unit 323 acquires an operation signal generated by receiving an operation input by a user, and outputs the acquired operation signal to the control unit 331. The operation signal includes, for example, a signal indicating power on / off and a signal indicating a broadcast wave channel. The operation input unit 323 is, for example, an input interface that receives an operation signal from an electronic device such as an operation button, a remote controller, or a mobile terminal device.

  The control unit 331 controls various operations of the receiving device 31. For example, the control unit 331 detects the presence of simul sound in which audio data of a plurality of playback methods is provided in one program from the configuration information input from the separation unit 313. In addition, when detecting the presence of simul sound, the control unit 331 selects a highest playback method that is a playback method that can be processed by the speech decoding unit 314 among a plurality of playback methods. The control unit 331 outputs a method selection signal indicating the selected reproduction method to the audio decoding unit 314. The control unit 331 generates various GUI screen data based on the operation signal input from the operation input unit 323, and outputs the generated GUI screen data to the GUI composition unit 317.

(Configuration of control unit)
Next, the configuration of the control unit 331 according to the present embodiment will be described. FIG. 8 is a block diagram illustrating a configuration of the control unit 331 according to the present embodiment. The control unit 331 includes a service detection unit 332, a method selection unit 333, and a channel selection unit 334.

  The service detection unit 332 detects MPT from the configuration information input from the separation unit 313, and determines whether or not simultaneous audio is provided based on the detected MPT. Here, the service detection unit 332 refers to the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) described in the MPT descriptor area (MPT_descriptors_byte) of the MPT for each asset related to the audio data. , When the number described in the simulcast group identification (simulcast_group_tag) included in the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) is a number other than the predetermined number '0xFF', The simulcast group identification (simulcast_group_tag) is obtained by encoding the same content as the audio data in a different manner. This is an identifier indicating the presence or absence of voice data, that is, the presence or absence of simulcast.If the number described in the simulcast group identification (simulcast_group_tag) is a predetermined number '0xFF', the service detection unit 332 Determine that no audio is provided.

  If the service detection unit 332 determines that simulcast is provided, the MH-speech component descriptor (MH-) in which a common number other than the predetermined number “0xFF” is described in the simulcast group identification (simulcast_group_tag). The service detection unit 332 identifies the Audio_Component_Descriptor (), the component type (component_component), the main component flag, and the component type (component_component) described in each of the identified MH-Audio component descriptor (MH-Audio_Component_Descriptor ()). The service detection unit 332 reads the values described in Based on the read value, the playback method and the main signal are specified for each audio data stream specified by the component tag, and the service detection unit 332 displays service information indicating the playback method for each stream. The data is output to the method selection unit 333. The service detection unit 332 outputs main signal information indicating a stream related to the main signal to the speech decoding unit 314.

  The method selection unit 333 selects one of the reproduction methods for each stream indicated by the service information input from the service detection unit 332 and one of the reproduction methods for which the audio decoding unit 314 has processing capability, for example, the highest reproduction method. To do. Specifically, the method selection unit 333 refers to the audio processing method table stored in advance in the storage unit 322, and identifies the reproduction method indicated by the audio processing method table among the reproduction methods indicated by the service information. The audio processing method table is data indicating a reproduction method in which the audio decoding unit 314 has processing capability. The system selection unit 333 selects the highest playback system among the specified playback systems. “Upper” means that a high processing capacity is required, for example, that the number of audio channels is large. In general, the higher the playback method, the higher the amount of data, the higher the reproducibility to the original sound. For example, the larger the number of audio channels, the more accurately the various spatial environments represented by the original sound can be reproduced. The method selection unit 333 generates method selection information indicating the selected reproduction method, and outputs the generated method selection information to the speech decoding unit 314. Therefore, the audio decoding unit 314 outputs the audio data decoded by the reproduction method selected by the method selection unit 333 to the loudspeaker unit 315.

  The channel selection unit 334 selects a broadcast channel specified by the operation signal input from the operation input unit 323, and outputs a broadcast channel signal indicating the selected broadcast channel to the reception unit 311. Therefore, the channel selection unit 334 can cause the reception unit 311 to receive a broadcast wave in a channel band corresponding to the selected broadcast channel. The storage unit 322 stores channel selection screen data for selecting a broadcast channel in advance. The channel selection unit 334 reads the channel selection screen data and outputs the read channel selection screen data to the GUI composition unit 317. Note that the channel selection unit 334 may output character data indicating the selected broadcast channel to the GUI synthesis unit 317.

(Example of audio playback method table)
Next, an example of the audio reproduction method table referred to by the method selection unit 333 will be described.
FIG. 9 is a diagram illustrating an example of an audio reproduction method table. The audio reproduction method table is data representing component type numbers indicating the reproduction methods in which the audio decoding unit 314 has processing capability. In the example shown in FIG. 9, the audio reproduction method table indicates “0x01”, “0x02”, “0x03”, “0x09”, and “0x09” as component types. Accordingly, it is indicated that the audio decoding unit 314 can process any of a single mono 1ch, dual mono 1ch × 2, stereo 2ch, surround 5ch, and surround 7.1ch as a reproduction method.

(Reception processing)
Next, the reception process according to the present embodiment will be described.
FIG. 10 is a flowchart showing a reception process according to the present embodiment.
(Step S <b> 101) The receiving unit 311 receives the broadcast wave transmitted by the transmission device 11 and demodulates the received broadcast wave. The decrypting unit 312 decrypts the encrypted multiplexed data obtained by demodulation. The separation unit 313 separates the multiplexed data obtained by decoding into program data and configuration information. Thereafter, the process proceeds to step S102.
(Step S <b> 102) The service detection unit 332 detects MPT from the separated configuration information, and analyzes the detected MPT to determine whether or not there is a plurality of playback method sounds (simultaneous sound) in the broadcasted program. judge. Thereafter, the process proceeds to step S103.

(Step S103) When it is determined that there is simul sound (YES in Step S103), the process proceeds to Step S104. When it is determined that there is no simul sound (NO in step S103), the process proceeds to step S106. In this case, the audio data of one reproduction method specified by analyzing the MPT is the target of the decoding process.
(Step S104) The method selection unit 333 refers to the audio processing method table stored in advance in the storage unit 322 among the reproduction methods specified by analyzing the MPT, and the reproduction method in which the audio decoding unit 314 has processing capability. And the highest playback method among the specified playback methods is selected. Thereafter, the process proceeds to step S105.
(Step S <b> 105) The method selection unit 333 determines to decode the audio data with the selected reproduction method, and outputs method selection information indicating the reproduction method to the audio decoding unit 314. Thereafter, the process proceeds to step S106.

(Step S <b> 106) The speech decoding unit 314 starts a decoding process on speech data encoded using the playback method indicated by the method selection information input from the method selection unit 333. Then, the process shown in FIG. 10 is complete | finished.

(Determination of playback method)
Next, a playback method determination process for audio data included in the received program data will be described. The following playback method determination processing is performed when determining whether or not there is simul sound in step S102.

FIG. 11 is a flowchart showing a playback method determination process according to the present embodiment.
(Step S201) The service detection unit 332 extracts the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) from the MPT descriptor area (MPT_descriptors_byte) of the detected MPT, and then proceeds to step S202.
(Step S202) The service detection unit 332 reads the number described in the simulcast group identification (simulcast_group_tag) from the extracted MH-audio component descriptor (MH-Audio_Component_Descriptor ()), and then proceeds to step S203.

(Step S <b> 203) The service detection unit 332 determines whether or not the read value is a predetermined value “0xFF”. If it is determined that the value is “0xFF” (YES in step S203), it is determined that simul sound is not provided for the asset to be processed related to the sound data, and the process proceeds to step S205. If it is determined that the value is not '0xFF' (NO in step S203), it is determined that simul sound is provided for the asset to be processed (audio data), and the process proceeds to step S204.

(Step S204) The service detection unit 332 reads the component type (component_type) and the component tag (component_tag) from the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) for the asset to be processed. The component type (component_type) and the component tag (component_tag) are associated with each other and stored (stored) in the storage unit 322. Thus, the reproduction method for each asset related to simul sound is specified, and the process proceeds to step S205.

(Step S205) The service detection unit 332 reads the component type (component_type) from the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) for the asset to be processed, thereby identifying the playback method when simulcast is not provided. Thereafter, the process proceeds to step S206.

(Step S206) The service detection unit 332 determines whether the asset to be processed is the end of the loop related to the asset described in the MPT. If it is determined that the end of the loop has been reached (YES in step S206), the processing shown in FIG. 11 is terminated. If it is determined that it is not the end of the loop (NO in step S206), the asset to be processed is changed to the next unprocessed asset, and the process proceeds to step S202. Therefore, it is determined whether or not simultaneous audio is provided for the received program data. When simultaneous audio is provided, a plurality of reproduction methods related to the provision are specified. In the case where simul sound is not provided, the reproduction method of one received sound data is specified.

As described above, the reception device 31 according to the present embodiment includes the service detection unit 332 that detects the presence of audio data of a plurality of playback methods in one program from the configuration information received from the transmission device 11, and the transmission device. 11 includes an audio decoding unit 314 that decodes audio data received from the audio data. In addition, the receiving device 31 includes a method selection unit 333 that selects a reproduction method that can be decoded by the audio decoding unit 314 among a plurality of reproduction methods.
With this configuration, the reception device 31 can reproduce audio based on audio data of any one of the received audio data of a plurality of reproduction methods. Therefore, the receiving device 31 can reproduce the sound intended by the program producer without deteriorating the quality due to the synthesis process.

Further, in the receiving device 31 according to the present embodiment, the method selection unit 333 selects a reproduction method having the highest processing capability among the reproduction methods that can be decoded by the audio decoding unit 314.
With this configuration, the reception device 31 can reproduce audio based on audio data of a method that can be decoded and has the highest processing capability among the received audio data of a plurality of reproduction methods. Therefore, the user can enjoy the voice service with the highest reproducibility to the original sound among the voice services intended by the program producer.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. About the structure same as the description mentioned above, the same code | symbol is attached | subjected and description is used.
The receiving device 31 includes a service detection unit 332a (not shown) instead of the service detection unit 332. The service detection unit 332a determines whether or not a multi-view service is provided using an MH-event information table (MH-EIT: MH-Event Information Table) instead of MPT.

  The MH-EIT is one of the components in the configuration information received from the transmission device 11, and represents information related to the program such as the name of the program to be broadcast and the broadcast date and time. In the present embodiment, the configuration information generation unit 112 of the transmission device 11 has an MH-audio component descriptor (MH-Audio_Component_Descriptor ()) in a descriptor area (descriptor ()) for a program (event) that provides a multi-view service. The configuration information generation unit 112 outputs the configuration information including the generated MH-EIT to the multiplexing unit 113.

Therefore, the service detection unit 332a determines whether or not the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) is described in the descriptor area (descriptor ()) of the MH-EIT. When the descriptor is described, the service detection unit 332a refers to the descriptor (MH-Audio_Component_Descriptor ()) and determines whether or not simulcast is provided in the same manner as the service detection unit 332. When it is determined that audio is provided, the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) in which a common number is described in the simulcast group identification (simulcast_group_tag) is specified. A playback method for each stream of audio data specified by the component tag with reference to the MH-audio component descriptor (MH-Audio_Component_Descriptor ()), The service detection unit 332a outputs service information indicating a reproduction method for each stream to the method selection unit 333. The service detection unit 332a indicates main signal information indicating a stream related to the main signal. Is output to the speech decoding unit 314.
Note that the MH-EIT to be processed may be, for example, the MH-EIT related to a program that is being broadcast at that time, or may be the MH-EIT related to a program that is a target of reception reservation.

(MH-EIT data structure)
Next, an example of MH-EIT included in the configuration information will be described.
FIG. 12 is a diagram illustrating an example of the MH-EIT. In the example illustrated in FIG. 12, the MH-EIT includes an event identification (event_id), a start time (start_time), a duration (duration), and a descriptor area (descriptor ()) for each event (program). In the event identification (event_id), an identification number of each event is described. The start time (start_time) and duration (duration) describe the start time and duration of the event (program), respectively. Therefore, the system selection unit 333 can read the information to know the start time and end time of the program, and determine the broadcast state (before start, during broadcast, or ended). The descriptor area (descriptor ()) is an area in which the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) described above is described. Further, a plurality of descriptor areas (descriptor ()) can be described for each event. That is, a plurality of MH-Audio component descriptors (MH-Audio_Component_Descriptor ()) that specify the audio data playback method for one program, for example, each of a plurality of audio data streams (corresponding to assets) are described. Sometimes.

(Reception processing)
Next, the reception process according to the present embodiment will be described.
FIG. 13 is a flowchart showing the reception process according to the present embodiment. The reception process according to the present embodiment includes steps S101, S102a, and S103-S106. Since the process of step S101 and S103-S106 is the same as that of what is shown in FIG. 10, those description is used.
In the process shown in FIG. 13, after the process of step S101 is completed, the process proceeds to step S102a.
(Step S102a) The service detection unit 332a detects the MH-EIT from the separated configuration information, and the program broadcast by analyzing the detected MH-EIT includes a plurality of playback method sounds (simultaneous sound). It is determined whether or not. In the MH-EIT analysis, the service detection unit 332a performs a playback method determination process (FIG. 11) for the MH-EIT instead of the MPT. Thereafter, the process proceeds to step S103.

As described above, the reception device 31 according to the present embodiment detects the presence of audio data of a plurality of playback methods in one program from the MH-EIT among the configuration information received from the transmission device 11. 332a and an audio decoding unit 314 that decodes audio data received from the transmission device 11. In addition, the receiving device 31 includes a method selection unit 333 that selects a reproduction method that can be decoded by the audio decoding unit 314 among a plurality of reproduction methods.
With this configuration, the reception device 31 can reproduce audio based on audio data of any reproduction method among the received audio data of a plurality of reproduction methods. Therefore, the receiving device 31 can reproduce the sound intended by the program producer without deteriorating the quality due to the synthesis process. In addition, the presence of simul sound in which audio data of a plurality of playback methods is provided in one program from the MH-EIT can be efficiently detected for each program.

(Third embodiment)
Next, a third embodiment of the present invention will be described. About the structure same as the description mentioned above, the same code | symbol is attached | subjected and description is used.
Since the method selection unit 333 of the receiving device 31 according to the above-described embodiment has selected the sound data of the reproduction method having the highest reproduction ability from the received sound data of the plurality of reproduction methods, the reproduction method desired by the user is not necessarily obtained. Is not necessarily selected. In the present embodiment, the configuration described below is provided so that the user can select audio data of a desired format from a plurality of audio data of a playback format included in program data being broadcast.

FIG. 14 is a block diagram illustrating a configuration of the control unit 331 according to the present embodiment. The control unit 331 of the receiving device 31 according to the present embodiment includes a method selection unit 333b instead of the method selection unit 333, and further includes a service notification unit 335b.
Similarly to the method selection unit 333, the method selection unit 333 b refers to the voice processing method table stored in advance in the storage unit 322, and among the reproduction methods indicated by the service information input from the service detection unit 332, the voice decoding unit 314. Specifies a playback method with processing capability.
On the other hand, when an operation signal indicating one of the specified reproduction methods is input from the operation input unit 323 to the method selection unit 333b, the reproduction method is selected based on the input operation signal. The method selection unit 333 b generates method selection information indicating the selected reproduction method, and outputs the generated method selection information to the speech decoding unit 314.

  The service notification unit 335b reads, from the storage unit 322, method selection button data indicating a method selection button for selecting a reproduction method by an operation. The storage unit 322 stores method selection button data in advance. The service notification unit 335b superimposes the character indicating the reproduction method specified by the method selection unit 333b on the basis of the service information on the method selection button, and displays the notification information indicating the method selection button with the character superimposed on the GUI composition unit 317. Output to. As a result, a method selection button is displayed on the display unit 318. Note that, when an operation signal is not input from the operation input unit 323 for a predetermined time (for example, one minute) from the start of display of the method selection button, the service notification unit 335b stops outputting the notification information. Therefore, since the display period of the method selection button is limited, it is possible to prevent the user from viewing the program.

(Method selection button)
Next, an example of a method selection button displayed on the display unit 318 by the service notification unit 335b is shown.
FIG. 15 is a diagram illustrating an example of the method selection button (method selection button 41) according to the present embodiment. In the example shown in FIG. 15, the receiving device 31 capable of processing audio data of three types of reproduction schemes (stereo 2 ch, surround 5.1 ch, surround 7.1 ch) receives four types of reproduction schemes (stereo). (2ch, surround 5.1ch, surround 7.1ch, surround 22.2ch) audio data is received as an example.

The method selection button 41 is a button displayed at a position closer to one vertex (upper right end) than the center of the display surface D of the display unit 318. By displaying the method selection button 41 at this position, viewing of the program by the user is not hindered.
The “stereo” character 42-1, the “5.1ch” character 42-2, and the “7.1ch” character 42-3 attached to the method selection button 41 are stereo 2ch and surround, respectively, as reproduction methods. This is a display indicating that 5.1ch and surround 7.1ch are possible.

  In the example illustrated in FIG. 15, the operation input unit 323 can perform operations on these displays. For example, the method selection unit 333b selects a reproduction method related to any of the characters 42-1 to 42-3 displayed in the display area including the position indicated by the operation signal input from the operation input unit 323. The shaded portion 43 displayed overlaid on the character 42-2 is a display indicating that surround 5.1ch is selected as the reproduction method related to the character 42-2. Therefore, the user can select the sound of a desired reproduction method among the reproduction methods that can be processed by the receiving device 31 for the sound provided by the program. When no operation signal is input to the method selection unit 333b, a playback method that can be processed in advance, for example, playback designated as the main voice in the MH-Audio component descriptor (MH-Audio_Component_Descriptor ()). A method may be selected.

(Reception processing)
Next, the reception process according to the present embodiment will be described.
FIG. 16 is a flowchart showing a reception process according to this embodiment. The reception process according to the present embodiment includes steps S101 to S103, S105, S106, and S111b to S116b. Since the process of step S101-S103, S105, and S106 is the same as that of what is shown in FIG. 10, those description is used.
In the process shown in FIG. 16, if it is determined in step S103 that there is a simulative sound (YES in step S103), the process proceeds to step S111b. If it is determined that there is no simultaneous sound (NO in step S103), the process proceeds to step S116b.

(Step S111b) The method selection unit 333b refers to the audio processing method table stored in advance in the storage unit 322, and among the reproduction methods indicated by the service information input from the service detection unit 332, the audio decoding unit 314 can process it. Specify the playback method. Thereafter, the process proceeds to step S112b.
(Step S <b> 112 b) The service notification unit 335 b reads the method selection button data from the storage unit 322, and notifies the GUI composition unit 317 of notification information indicating a method selection button in which characters indicating the specified reproduction method are superimposed on the method selection button. Output. As a result, a method selection button is displayed on the display unit 318. Thereafter, the process proceeds to step S113b.

(Step S113b) The method selection unit 333b determines whether an operation signal indicating one of the specified reproduction methods is input from the operation input unit 323. It is determined whether or not the user has selected a playback method. If it is determined that the input has been made (YES in step S113b), the playback method is selected based on the input operation signal. Thereafter, the process proceeds to step S105. If it is determined that no input has been made (NO in step S113b), the process proceeds to step S114b.

(Step S114b) The method selection unit 333b determines whether or not a predetermined time (for example, one minute) has elapsed since the display of the method selection button was started. When it is determined that the time has elapsed (YES in step S114b), the method selection unit 333b selects the above-described main audio as the default reproduction method, and proceeds to step S115b. When it is determined that the time has not elapsed (NO in step S114b), the process proceeds to step S113b.
(Step S115b) The service notification unit 335b stops outputting the notification information. As a result, the method selection button is deleted. Thereafter, the process shown in FIG. 16 ends.

(Step S116b) The service notification unit 335b is instructed by one playback method identified by analyzing the MPT, that is, the component type (component_type) described in the MH-Audio component descriptor (MH-Audio_Component_Descriptor ()). Notification information indicating the reproduction method is output to the GUI composition unit 317. Thus, the instructed reproduction method is displayed, and then the processing shown in FIG.

As described above, the receiving apparatus 31 according to the present embodiment includes the service notification unit 335b that outputs notification information indicating a reproduction method that can be processed by the audio decoding unit 314 among a plurality of reproduction methods, and includes a method selection unit. 333b selects one of the reproduction methods represented as the method selection button by the notification information according to the operation input.
With this configuration, the reception device 31 can reproduce audio based on audio data of a method that can be decoded and selected according to an operation input, from among the received audio data of a plurality of methods. Therefore, the user can select a desired reproducible audio service from the audio services intended by the program producer.

In addition, the receiving device 31 according to the present embodiment includes a channel selection unit 334 that selects a broadcast channel for receiving a broadcast wave according to an operation input. Further, the service detection unit 332 extracts an identifier indicating the presence / absence of audio data obtained by encoding the same contents as the audio data constituting the program by a different method from the MPT included in the received multiplexed data. Further, the service detection unit 332 detects the presence of a plurality of types of audio data based on the extracted identifier.
With this configuration, it is possible to reproduce audio based on audio data of a desired format from the audio data constituting the program received on the selected broadcast channel.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. About the structure same as the description mentioned above, the same code | symbol is attached | subjected and description is used.
In the present embodiment, the configuration described below allows the user to select audio data of a desired format from a plurality of playback format audio data to be broadcast in a program to be received at the time of reception reservation. Like that. The reception reservation may be either a recording reservation or a viewing reservation.

  Here, the configuration information generation unit 112 of the transmission device 11 uses the above-described MH-EIT and MH-Service Description Table (MH-SDT: MH-Service Description Table) as information representing an electronic program guide indicating the broadcast schedule of the program. Is generated. The MH-SDT is information indicating information related to the organization channel such as the name of the organization channel (that is, the name of each broadcast channel) and the name of the broadcaster. The configuration information generation unit 112 outputs configuration information including the generated MH-EIT and MH-SDT to the multiplexing unit 113. As will be described below, the reception device 31 receives MH-EIT and MH-SDT from the transmission device 11, and generates EPG data based on the received MH-EIT and MH-SDT.

  FIG. 17 is a block diagram illustrating a configuration of the control unit 331 according to the present embodiment. The control unit 331 of the reception apparatus 31 according to the present embodiment includes a service detection unit 332a, a method selection unit 333b, a channel selection unit 334, and a service notification unit 335b, and further includes a reception reservation unit 336c.

The reception reservation unit 336c extracts MH-SDT and MH-EIT from the configuration information input from the separation unit 313, and sets the broadcast time of each program indicated by the MH-EIT for each broadcast channel indicated by the extracted MH-SDT. Identify. The reception reservation unit 336c configures the EPG by arranging broadcast channels and broadcast times specified for each program in order of early broadcast time for each broadcast channel. The reception reservation unit 336c generates EPG data indicating the configured EPG, and outputs the generated EPG data to the GUI composition unit 317. As a result, the EPG is displayed on the display unit 318.
The reception reservation unit 336c selects a program related to the reception reservation based on the operation signal input from the operation input unit 323 from the programs indicated by the EPG data. For example, the reception reservation unit 336c selects a program whose position indicated by the operation signal is included in the display area on the EPG. The reception reservation unit 336c outputs program information indicating the selected program to the service detection unit 332a.

  The service detection unit 332a analyzes the MH-EIT related to the program indicated by the program information input from the reception reservation unit 336c, and determines whether or not the program has a plurality of playback method sounds. When it is determined that there is audio data of a plurality of reproduction methods, the service notification unit 335b causes the display unit 318 to display a method selection button indicating a reproduction method that can be processed by the audio decoding unit 314 among the plurality of reproduction methods. The method selection unit 333b selects one of the reproduction methods displayed on the method selection button based on the operation signal input from the operation input unit 323. The method selection unit 333 b outputs method selection information indicating the selected reproduction method to the speech decoding unit 314.

The reception reservation unit 336c receives an operation signal for instructing a reception start time and a reception end time as the reception time of the program from the operation input unit 323. The reception reservation unit 336c outputs a reception start signal that instructs reception start at the reception start time to the audio decoding unit 314 and the video decoding unit 316. The reception reservation unit 336c outputs a reception end signal instructing the end of reception at the reception end time to the audio decoding unit 314 and the video decoding unit 316.
Therefore, the audio decoding unit 314 performs decoding processing on the audio data using the selected reproduction method at the reception time designated by the operation input, and the video decoding unit 316 performs decoding processing on the video data.

(Reception processing)
Next, the reception process according to the present embodiment will be described.
FIG. 18 is a flowchart showing a reception process according to this embodiment. The reception process according to the present embodiment includes steps S101-S103, S105, S111b-S114b, S116b, and S121c-S124c. The processes in steps S101 to S103 and S105 are the same as those shown in FIG. 10, and the processes in steps S111b to S114b and S116b are the same as those shown in FIG.

In the process shown in FIG. 18, after step S101, the process proceeds to step S121c.
(Step S121c) The reception reservation unit 336c specifies the broadcast time of each program indicated by the EIT for each broadcast channel indicated by the MH-SDT extracted from the configuration information. The reception reservation unit 336c generates EPG data in which the broadcast time specified as the broadcast channel for each program is arranged in the order of the broadcast time for each broadcast channel. The reception reservation unit 336c causes the display unit 318 to display the EPG by outputting the generated EPG data to the GUI composition unit 317. Thereafter, the process proceeds to step S122c.
(Step S122c) The reception reservation unit 336c selects a reception reservation, that is, a program related to viewing or recording reservation, from the program indicated by the EPG data, based on the operation signal input from the operation input unit 323. Thereafter, the process proceeds to step S102. In step S102, the MH-EIT related to the selected program is analyzed.

After step S105 or S116b is completed, or when it is determined in step S114b that a predetermined time has elapsed (YES in step S114b), the process proceeds to step S123c. At this stage, the reproduction method is determined by the method selection unit 333b.
(Step S123c) The service notification unit 335b deletes the method selection button displayed on the display unit 318. Thereafter, the process proceeds to step S124c.
(Step S124c) The voice decoding unit 314 starts decoding the audio data using the reproduction method selected by the method selection unit 333b at the reception start time indicated by the reception reservation unit 336c. Then, the process shown in FIG. 18 is complete | finished.

  In the above description, a case where a viewing reservation is instructed as a reception reservation is taken as an example. However, when a recording reservation is instructed, program information indicating the program and a voice decoding unit 314 are decoded in the storage unit 322. The audio data and the video data decoded by the video decoding unit 316 are stored in association with each other. In that case, the audio decoding unit 314 may not output the decoded audio data to the loudspeaker 315, and the video decoding unit 316 may not output the decoded video data to the GUI synthesis unit 317.

As described above, the receiving device 31 according to the present embodiment includes the reception reservation unit 336c that reserves reception of one of the programs scheduled to be broadcast in response to an operation input. In addition, the service detection unit 332a includes an identifier indicating the broadcast time for each program scheduled to be broadcast from the received MH-EIT, and the presence / absence of audio data in which the same content as the audio data constituting the program is encoded using a different method. The program information including is extracted. Further, the service detection unit 332a detects the presence of a plurality of types of audio data in the program data reserved for reception by the reception reservation unit 336c based on the identifier.
With this configuration, it is possible to store or reproduce the sound data of any one of a plurality of sound data to be received in the selected program. Therefore, for the program to be broadcast in the selected program, the audio data of the desired system is recorded or the audio data related to the audio intended by the program producer without deterioration of quality due to the voice synthesis process. Audio can be played back.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. About the structure same as the description mentioned above, the same code | symbol is attached | subjected and description is used.
In the present embodiment, by providing the configuration described below, a display showing audio data of a set of a plurality of playback methods and languages is displayed on the display unit 318 with priority given to a predetermined language over other languages.

  FIG. 19 is a block diagram illustrating a configuration of the control unit 331 according to the present embodiment. The control unit 331 of the reception device 31 according to the present embodiment includes a service detection unit 332d, a method selection unit 333b, a channel selection unit 334, and a service notification unit 335d. The storage unit 322 (FIG. 7) stores in advance priority language data indicating the correspondence between priority and language. Priority refers to whether or not to display the audio data with priority over other languages when there are multiple languages that express the audio of the same content making up the program, or between languages Means priority. For example, the storage unit 322 stores priority language data indicating that Japanese is prioritized over other languages (English, Chinese, etc.). As the priority language data, language setting data indicating a language used for screen display for exerting or adjusting the function of the receiving device 31 may be used.

As described above, the service detection unit 332d determines whether simul sound is provided based on MPT or MH-EIT, and specifies the playback method for each asset of the sound data. In the present embodiment, when the service detection unit 332d determines that simulative audio is provided, the service detection unit 332d specifies a language that expresses the audio for each asset.
Specifically, the service detection unit 332d reads the language code (ISO_639_language_code) from the MH-audio component descriptor (MH-Audio_Component_Descriptor ()) described in MPT or MH-EIT, and the service detection unit 332d Service information indicating a set of the reproduction method and language specified for each is output to the service notification unit 335b.

  The service notification unit 335d specifies a set of playback method and language for each asset indicated by the service information input from the service detection unit 332d. The service notification unit 335d changes the order of the specified set according to the language priority indicated by the priority language data read from the storage unit 322. For example, when the priority language data indicates that Japanese is prioritized over other languages, the service notification unit 335d causes the set including Japanese among the specified sets to precede the set including other languages. The service notification unit 335b reads the method button data from the storage unit 322. The service notification unit 335d arranges characters indicating each set and superimposes them on the method buttons according to the changed order. The service notification unit 335d causes the display unit 318 to display the method selection button indicated by the notification information by outputting notification information indicating the method selection button in which the characters are superimposed to the GUI composition unit 317.

(Method selection button)
Next, an example of a method selection button displayed on the display unit 318 by the service notification unit 335d is shown.
FIG. 20 is a diagram showing an example of the method selection button (method selection button 51) according to the present embodiment. The method selection button 51 indicates six sets 52-1 to 52-6, and sets 52-1 to 52-3 related to Japanese are sets 52-4 to 52-in which no other language or language is set. Indicates that priority is given to 6. Set 52-1 is Japanese audio in stereo 2ch, Set 52-2 is Japanese audio in surround 5.1ch, Set 52-3 is Japanese audio in surround 7.1ch, Set 52-4 Indicates the English audio in stereo 2ch, respectively. In the sets 52-5 and 52-6, no language is specified, and surround 5.1ch and 7.1ch are specified as the reproduction methods. By the display of the sets 52-1 to 52-6, an operation for selecting audio data related to the corresponding set can be performed as in the example shown in FIG.
In this manner, in the receiving device 31, sets related to Japanese are arranged in an order ahead of sets related to other languages or sets without language designation. Therefore, the user is prompted to select audio data related to the Japanese language set.

In the above-described example, a case has been described in which a priority of two levels of giving priority to Japanese, which is one language, over other languages is specified as the priority of the language, but is not limited thereto. . Three or more levels of priority may be specified for a plurality of languages in the priority language data, and the service notification unit 335d may arrange characters indicating the set of reproduction methods and languages for each asset in an order according to the priority. In addition, for a set for which no language is specified, the service notification unit 335d may arrange characters indicating the set with a predetermined priority, for example, the same priority as the highest priority language. In addition, when there are a plurality of types of playback methods for the same language, the service notification unit 335d may preferentially arrange characters indicating the set as the higher-level playback method.
The service notification unit 335d may display the set with higher priority on the display unit 318 with higher visibility. In order to increase the visibility, the service notification unit 335d may use a larger character or emphasize contrast with the luminance of the background.

As described above, according to the receiving device 31 according to the present embodiment, when one program includes audio data of a set of a plurality of playback methods and languages, the service notification unit 335d notifies the method selection button. As information, a character indicating a set related to a predetermined language is output to the GUI composition unit 317 in preference to a character indicating a set related to another language.
With this configuration, information indicating a set of a predetermined language and method among a plurality of methods and language sets of audio data constituting the program is notified in preference to information indicating a set of other languages and methods. The Therefore, it is possible to prompt the user to select a sound related to a set including a predetermined language.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope indicated in the claims, and the technical configurations disclosed in different embodiments are appropriately combined. The obtained embodiment is also included in the technical scope of the present invention.
Each component of the present invention can be arbitrarily selected, and an invention having a selected configuration is also included in the present invention.

For example, the loudspeaker 315 and the display unit 318 may be omitted if various types of data can be transmitted to and received from the receiving device 31. Further, the video decoding unit 316 may be omitted.
In the receiving apparatus 31, the method selection unit 333 has exemplified the case where the reproduction method having a large number of audio channels is selected as the upper reproduction method, but is not limited thereto. For example, in two or more reproduction methods, when the number of audio channels is the same and the sampling frequency is different, the method selection unit 333 may select a reproduction method having a high sampling frequency. In addition, in two or more reproduction methods, when the number of audio channels and the sampling frequency are the same and the quantization accuracy is different, the method selection unit 333 may select a reproduction method with a high quantization accuracy.

  The sampling frequency (sampling_rate) is described in the MH audio component descriptor (MH-Audio_Component_Descriptor ()) as shown in FIG. The quantization accuracy is described as a sound quality display (quality_indicator) in the MH audio component descriptor (MH-Audio_Component_Descriptor ()). In the sound quality display (quality_indicator), any one of modes 1 to 3 can be specified. Among modes 1 to 3, mode 1 has the highest quantization accuracy, and the quantization accuracy decreases in the order of modes 1, 2, and 3. Therefore, the service detection units 332 and 332a can specify the sampling frequency and the quantization accuracy for each stream of audio data specified by the component tag from the MH audio component descriptor (MH-Audio_Component_Descriptor ()).

  In the above-described embodiment, the case where the media transport method according to MMT (MPEG Media Transport) defined by MPEG-H is used as a transmission method for transmitting various data is exemplified. For example, a method defined by MPEG-2 Systems may be used. In addition, a data format, an encryption method, and an encoding method related to transmission may be a format or a method defined by the transmission method.

  Further, a part of the transmission device 11 and a part of the reception device 31 in the above-described embodiment may be realized by a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed. Here, the “computer system” is a computer system built in the recognition data transmission apparatus, and includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In this case, a volatile memory inside a computer system that serves as a server or a client may be included that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

In addition, this invention can be implemented also in the following aspect.
(1) A detection unit that detects the presence of a plurality of types of audio data in one program from received data, a decoding unit that decodes the audio data, and a method that can be processed by the decoding unit among the plurality of methods And a selection unit that selects any of the above.

(2) The receiving device according to (1), wherein the selection unit selects a method having the highest processing capability among methods that can be processed by the decoding unit.

(3) A channel selection unit that selects a channel for receiving the data in response to an operation input, and the detection unit encodes the same content as the audio data constituting the program from the received data in a different method. The receiving apparatus according to (1) or (2), wherein an identifier indicating presence / absence of data is extracted, and presence of a plurality of types of audio data is detected based on the identifier.

(4) A reception reservation unit for reserving reception of any program among programs scheduled to be broadcast in response to an operation input, wherein the detection unit includes a broadcast time for each program scheduled to be broadcast from the received data; The receiving device according to any one of (1) to (3), wherein the presence of audio data obtained by encoding the same content as the audio data constituting the program by a plurality of methods is detected.

(5) A broadcasting system including a transmitting device for transmitting data and a receiving device for receiving the data, wherein the receiving device detects the presence of audio data of a plurality of systems in one program from the received data. A broadcasting system comprising: a detecting unit that performs decoding; a decoding unit that decodes the audio data; and a selection unit that selects one of the plurality of methods that can be processed by the decoding unit.

(6) A receiving method in the receiving apparatus, the detecting process for detecting the presence of a plurality of audio data in one program from the received data, the decoding process for decoding the audio data, and the plurality of systems And a selection process for selecting one of the methods that can be processed in the decoding process.

(7) In the receiving apparatus computer, in the detection procedure for detecting the presence of a plurality of types of audio data in one program from the received data, the decoding procedure for decoding the audio data, and the decoding procedure among the plurality of methods A program for executing a selection procedure for selecting one of the methods that can be processed.

  DESCRIPTION OF SYMBOLS 1 ... Broadcasting system, 11 ... Transmission apparatus, 111 ... Program data generation part, 112 ... Configuration information generation part, 113 ... Multiplexing part, 114 ... Encryption part, 115 ... Transmission part, 12 ... Broadcast transmission path, 13 ... Broadcast Satellite, 31 ... receiving device, 311 ... receiving unit, 312 ... decoding unit, 313 ... separating unit, 314 ... audio decoding unit, 315 ... loudening unit, 316 ... video decoding unit, 317 ... GUI composition unit, 318 ... display unit, 322: Storage unit, 323 ... Operation input unit, 331 ... Control unit, 332, 332a, 332d ... Service detection unit, 333, 333b ... Method selection unit, 334 ... Channel selection unit, 335b, 335d ... Service notification unit, 336c ... Reception Reservation Department

Claims (3)

Detecting audio assets in a plurality of audio modes based on simulcast group identification that is included in the MMT package table separated from the received broadcast signal and takes the same value for audio assets that transmit the same content in different audio modes;
A receiving apparatus that selects one of the audio assets of the reproducible audio mode among the plurality of audio modes. A receiving method in a receiving device,
A process of detecting audio assets in a plurality of audio modes based on simulcast group identifications included in an MMT package table separated from a received broadcast signal and having the same value for audio assets that transmit the same content in different audio modes; ,
Selecting one of the plurality of audio modes in a reproducible audio mode;
Receiving method. In the computer of the receiving device,
A procedure for detecting audio assets in a plurality of audio modes based on simulcast group identifications that are included in an MMT package table separated from a received broadcast signal and that have the same value for audio assets that transmit the same content in different audio modes; ,
A procedure for selecting one of the audio assets of the reproducible audio mode among the plurality of audio modes;
A program for running

Images