JP7279549B2 - Broadcast receiver - Google Patents

Description

The present disclosure relates to a broadcast receiver that outputs audio signals and the like.

Conventional acoustic technology has the effect of enhancing the sense of presence by arranging multiple speakers on a plane based on ear height (conventional 5.1-channel and 7.1-channel audio). In recent years, a technology called stereophonic sound has made it possible to express a more realistic acoustic space by adding a component in the height direction to the position of the speaker and arranging the speaker in three dimensions. .

Using this stereophonic technology, new stereophonic technology such as Dolby Atmos (registered trademark) or DTS:X (registered trademark) of DTS is beginning to spread. These introduce a new concept called object-based audio, in which arbitrary positional information is given to audio signals in addition to the three-dimensional arrangement of speakers. This technology has already been installed in AV amplifiers, AV receivers, etc., and has realized the construction of an acoustic space with a high sense of presence.

On the other hand, new 4K8K broadcasting including 22.2-channel stereophonic sound has already started. This 22.2-channel stereophonic sound is based on channel-based audio technology and adds a three-dimensional arrangement of speakers. Therefore, the arrangement positions of a total of 24 speakers are determined in advance.

It is generally difficult for each home to require a total of 24 speakers in order to reproduce this 22.2-channel stereophonic space. Therefore, in order to enjoy 22.2-channel stereophonic sound at home, a method of down-mixing 22.2-channel audio data into 5.1-channel audio data, which is a traditional surround format, has been proposed ( For example, see Patent Document 1 and Patent Document 2).

However, downmixing the content, which is 22.2-channel audio data, into 5.1-channel audio data at the time of output is not sufficient in view of the recent spread of stereophonic technology. do not have.

Therefore, in order to obtain a higher sense of realism than downmixing 22.2-channel audio data to 5.1-channel audio data, it is possible to utilize object-based audio technology, which is becoming popular as stereophonic technology. (See, for example, Non-Patent Document 1 and Non-Patent Document 2).

Japanese Patent No. 6228700 Japanese Patent No. 6228701

Three-dimensional multi-channel sound studio standard (ARIB-STD B59 standard), Association of Radio Industries and Businesses, Dolby Atmos (registered trademark) Home Theater Installation Guidelines, [online], [searched June 28, 2019], Internet <URL: https://www.dolby.com/us/en/technologies/dolby-atmos /dolby-atmos-home-theater-installation-guidelines. pdf>

However, 22-channel audio technology and object-based audio technology have different ideas for constructing an acoustic space. is not compatible with any speaker position. Therefore, it is not easy to construct a 22.2-channel acoustic space with object-based audio technology.

An object of the present disclosure is to provide a broadcast receiver capable of constructing a 22.2-channel acoustic space using object-based audio technology.

A broadcast receiving device according to one aspect of the present disclosure provides a channel configuration for determining whether or not an audio channel configuration of a broadcast stream obtained via a tuner or a broadcast stream recorded on an optical medium is 22.2 channels. a determining unit, a speaker position information acquiring unit that acquires speaker position information defined in the 22.2 channel standard, and a channel-based audio data included in the broadcast stream that is converted into object-based audio data and output. When the channel configuration is 22.2 channels, the data conversion unit converts the audio data of the channels for which coordinate conversion of the speaker positions out of the 22.2 channels is required. , and assigning speaker label information to the audio data of channels that do not require coordinate conversion of the speaker positions. Convert to base audio data.

A broadcast receiving device according to one aspect of the present disclosure provides a channel configuration for determining whether or not an audio channel configuration of a broadcast stream obtained via a tuner or a broadcast stream recorded on an optical medium is 22.2 channels. a determining unit, a speaker position information acquiring unit that acquires speaker position information defined in the 22.2 channel standard, and a channel-based audio data included in the broadcast stream that is converted into object-based audio data and output. and a data conversion unit that, when the channel configuration is 22.2 channels, adds the coordinate information of the speaker position to the audio data of all the channels, thereby converting the channel Converting the base audio data into the object-based audio data.

In addition, these general or specific aspects may be realized by a system, method, integrated circuit, computer program, or a recording medium such as a computer-readable CD-ROM. Any combination of programs and recording media may be used.

According to the broadcast receiving device of the present disclosure, a 22.2-channel acoustic space can be constructed using object-based audio technology.

FIG. 1 is a diagram showing a configuration example of a broadcast receiving apparatus according to Embodiment 1. FIG. 2 is a diagram showing a configuration of an audio processing section of the broadcast receiving apparatus according to Embodiment 1. FIG. 3 is a diagram showing an example of an audio stream input to an audio processing unit according to Embodiment 1. FIG. FIG. 4 is a diagram showing audio data converted by the audio processing unit according to the first embodiment. FIG. 5 is a diagram showing coordinate information represented by orthogonal coordinates. FIG. 6 is a diagram showing coordinate information represented by polar coordinates. FIG. 7A is a diagram showing an example of speaker placement in the middle layer of an acoustic space. FIG. 7B is a diagram showing an example of speaker arrangement in the upper layer of the acoustic space. 8 is a diagram showing the operation of the audio processing section of the broadcast receiving apparatus according to Embodiment 1. FIG. 9 is a diagram showing another configuration of the audio processing section of the broadcast receiving apparatus according to Embodiment 1. FIG. 10 is a diagram showing a configuration of a data amount adjustment unit of the audio processing unit shown in FIG. 9. FIG. 11 is a diagram showing a configuration of an audio processing section of a broadcast receiving apparatus according to a modification of Embodiment 1. FIG. 12 is a diagram showing audio data converted by an audio processing unit according to a modification of Embodiment 1. FIG. 13 is a diagram showing a configuration of an audio processing section of a broadcast receiving apparatus according to Embodiment 2. FIG. FIG. 14 is a diagram showing audio data converted by the audio processing unit according to the second embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that each of the embodiments described below is a specific example of the present invention. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are examples and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in an independent claim indicating an implementation mode according to one aspect of the present invention will be described as optional constituent elements. Implementations of the invention are not limited to the present independent claims, but may also be expressed by other independent claims.

Each figure is a schematic diagram and is not necessarily strictly illustrated. Moreover, in each figure, the same code|symbol is attached|subjected with respect to substantially the same structure, and the overlapping description may be abbreviate|omitted or simplified.

(Embodiment 1)
[1-1. Overall configuration of broadcast receiving device]
First, the overall configuration of a broadcast receiving apparatus 1 according to this embodiment will be described with reference to FIG.

FIG. 1 is a diagram showing a configuration example of a broadcast receiving apparatus 1 according to Embodiment 1. As shown in FIG.

The broadcast receiving device 1 is a device that outputs audio signals and the like. The broadcast receiver 1 is, for example, a broadcast receiver used for a television, a Blu-ray recorder, a Blu-ray player, a set-top box, or the like.

As shown in FIG. 1, the broadcast receiving apparatus 1 includes a first signal input section 21 and a second signal input section 22, a separation control section 40, a video processing section 50, an audio processing section 10, and a signal output section 60. and a memory 70 .

The first signal input section 21 includes a tuner to which broadcast wave signals are input, and a demodulation section that demodulates the frequency signal selected by the tuner. A broadcast wave signal input to the first signal input unit 21 is converted into a broadcast stream (TLV format) via a tuner and a demodulator, and output to the separation control unit 40 .

The second signal input section 22 includes a disk drive into which an optical medium is inserted, and an FE (front end) signal processing section that processes signals read by the disk drive. A broadcast stream (TLV format or TS format) recorded on the optical media is output to the separation control unit 40 via the disk drive and FE signal processing unit.

Broadcast receiver 1 may include at least one of first signal input section 21 and second signal input section 22 . For example, if the broadcast receiver 1 is a Blu-ray recorder, the broadcast receiver 1 will have both the first signal input section 21 and the second signal input section 22 . If the broadcast receiver 1 is a television, the broadcast receiver 1 may include the first signal input section 21 and not include the second signal input section 22 .

The separation control section 40 separates and outputs the broadcast streams output from the first signal input section 21 and the second signal input section 22 . For example, the broadcast stream input to the separation control unit 40 is separated into a video stream, an audio stream, management information such as MPT (MMT Package Table), and other data. The video stream is output to the video processing section 50, and the audio stream is output to the audio decoder 100 and the channel configuration information acquisition section 101 of the audio processing section 10. FIG. Also, part of the management information such as MPT is output to channel configuration determining section 102 of audio processing section 10 .

The video processing section 50 processes the input video stream and outputs it to the signal output section 60 . The audio processing unit 10 processes the audio data of the input audio stream together with the information stored in the memory 70 and outputs the processed audio data to the signal output unit 60 . The audio processing section 10 will be described later in detail.

The signal output unit 60 includes a video output unit 61 , a digital video/audio output unit 62 , an audio output unit 63 , and a digital audio output unit 64 . For example, the video output unit 61 outputs a signal to a display, the digital video/audio output unit 62 outputs a signal standardized by HDMI (registered trademark) or MHL, and the audio output unit 63 outputs a speaker or Outputs signals to headphones, etc. The digital audio output unit 64 performs optical digital output or coaxial digital output that conforms to IEC60958, and ARC (Audio Return Channel) defined by HDMI 1.4 or eARC (Audio Return Channel) defined by HDMI 2.1. (Enhanced Audio Return Channel).

It should be noted that the signal output section 60 need not include all of the output sections 61-64. For example, when the broadcast receiver 1 is a broadcast receiver for television, the signal output unit 60 includes a video output unit 61, an audio output unit 63 and a digital audio output unit 64, and a digital video/audio output unit 62. You don't have to.

In this way, the broadcast receiver 1 performs audio processing and the like on the broadcast stream and outputs audio signals and the like.

[1-2. Configuration of Audio Processing Unit]
Next, the configuration of the audio processing section 10 will be described with reference to FIGS. 2 to 7B.

FIG. 2 is a diagram showing the configuration of the audio processing section 10 of the broadcast receiving apparatus 1. As shown in FIG.

The audio processing unit 10 decodes and outputs the input audio stream. The audio processing unit 10 also converts channel-based audio data included in the audio stream into object-based audio data and outputs the converted audio data.

The audio processing unit 10 of this embodiment has the following configuration for converting channel-based audio data into object-based audio data. Note that the channel-based audio data is sound data set for each channel at a predetermined position, and the object-based audio data is data including sound data and information on the position from which the sound is output.

As shown in FIG. 2, the audio processing unit 10 includes an audio decoder 100, a channel configuration information acquisition unit 101, a channel configuration determination unit 102, a data conversion unit 103, and a speaker position information acquisition unit 104.

An audio stream input to the audio processing unit 10 is input to the audio decoder 100 and the channel configuration information acquisition unit 101 .

The audio decoder 100 decodes the input audio stream and outputs channel-based audio data. Channel-based audio data output from audio decoder 100 is input to audio output section 63 and data conversion section 103, respectively.

The channel configuration information acquisition unit 101 acquires channel configuration information, which is information about the audio channel configuration, based on the input audio stream. The channel configuration information indicates how the audio channels of the broadcast stream are configured, for example, whether it is configured with 22.2 channels, 7.1 channels, 5.1 channels, 2 channels, or 1 channel. This is information indicating whether it is configured.

FIG. 3 is a diagram showing an example of an audio stream input to the audio processing section 10. As shown in FIG. FIG. 3 shows an example in which an audio-specific configuration is included in the header of an audio stream, and a channel configuration is included in the audio-specific configuration.

Channel configuration information acquisition section 101 acquires channel configuration information from the channel configuration in the audio stream, and outputs the channel configuration information to channel configuration determination section 102 .

Alternatively, channel configuration determining section 102 acquires channel configuration information based on the audio asset information in the management information input to channel configuration determining section 102 . Audio asset information is information necessary for handling audio data of an audio stream. The audio asset information includes the channel configuration information described above. The audio asset information is described in detail in another non-patent document, "Advanced Broadband Digital Satellite Broadcasting Operation Regulations (ARIB TR-B39), Association of Radio Industries and Businesses."

In this way, the channel configuration determination unit 102 acquires channel configuration information from the channel configuration information acquisition unit 101, and also acquires channel configuration information from the audio asset information included in the broadcast stream. Acquisition of these channel configuration information may be performed simultaneously, or only one of them may be performed.

The channel configuration determination unit 102 determines whether or not the audio channel configuration of the broadcast stream is 22.2 channels. Further, channel configuration determination section 102 outputs the determination result to data conversion section 103 as channel determination information.

When the channel configuration determination unit 102 determines that the audio channel configuration is 22.2 channels, the data conversion unit 103 acquires predetermined information from the speaker position information acquisition unit 104, Converts the audio data of the object to object-based audio data and outputs it. A case where it is determined that the audio channel configuration is not 22.2 channels will be described in a second embodiment.

FIG. 4 is a diagram showing audio data converted by the data conversion section 103 of the audio processing section 10. As shown in FIG. FIG. 4 shows an example in which coordinate information and speaker label information, which are examples of speaker position information, are added to channel-based audio data input to the data conversion unit 103, and output as object-based audio data. It is

The coordinate information is coordinate information of speaker positions defined in the 22.2 channel standard. This coordinate information is stored in the memory 70 as, for example, a coordinate information table. The coordinate information may be represented by orthogonal coordinates as shown in FIG. 5, or may be represented by polar coordinates as shown in FIG.

The speaker label information is information for specifying the speaker defined by the audio codec specifications (hereinafter referred to as output audio codec specifications) output by the broadcast receiving device 1, and is used by the signal output unit 60 of the broadcasting receiving device 1. Information that can be interpreted even by equipment connected to the This speaker label information is stored in the memory 70 as, for example, a label information table. The speaker label information is described in detail in another non-patent document "Backwards-compatible object audio carriage using Enhanced AC-3, ETSI TS 103 420 V1.2.1 (2018-10)".

Note that the coordinate information and the speaker label information may be described in the program when the audio processing unit 10 is realized by the program.

Speaker position information acquisition section 104 acquires coordinate information and speaker label information from memory 70 based on read access from data conversion section 103 , and outputs them to data conversion section 103 .

The data conversion unit 103 adds coordinate information to the audio data of the channels, among the 22.2 channels, for which coordinate conversion of speaker positions is required. In addition, the data conversion unit 103 directly applies the speaker defined in the output audio codec specification of the broadcast receiving apparatus 1 to the audio data of the channel that does not require coordinate conversion of the speaker position among the 22.2 channels. Therefore, speaker label information is added.

Here, among the 22.2 channels, the channels for which coordinate transformation of speaker positions needs to be performed will be described with reference to FIGS. 4, 7A, and 7B.

FIG. 7A is a diagram showing an example of speaker placement in the middle layer of an acoustic space. FIG. 7B is a diagram showing an example of speaker arrangement in the upper layer of the acoustic space. In FIGS. 7A and 7B, the positions of the 22-channel speakers are indicated by hatching dots, and the positions of the speakers specified by the atoms typical configuration are indicated by diagonal hatching. Note that the atoms typical configuration is an example of output audio codec specifications of the broadcast receiving apparatus 1 .

As shown in FIG. 7A, in the middle layer of the acoustic space, for example, the 22.2-channel FL, FR, and FC speakers are the same as the L, R, and C speakers defined in the output audio codec specifications of the broadcast receiving apparatus 1. Positioned to be located at or in the vicinity of. Further, as shown in FIG. 7B, in the upper layer of the acoustic space, for example, the 22.2-channel TpSiL, TpSiR, TpFC, and TpBC speakers are far from the 6ch speakers defined by the output audio codec specifications of the broadcast receiving apparatus 1. placed at a distance.

Due to the positional relationship of the speakers shown in FIGS. 7A and 7B, in the example shown in FIG. 4, each audio data corresponding to the channels (TpSiL, TpSiR, TpFC, TpBC) located in the upper layer has Coordinate information is given. Audio data corresponding to the channels (FL, FR, FC) located in the middle layer are not provided with coordinate information because there is no need to perform coordinate conversion, and are provided with speaker label information.

In this way, the data conversion unit 103 determines that the speaker position defined by the 22.2 channel standard is at least a predetermined distance from the speaker position defined by the output audio codec specification of the broadcast receiving apparatus 1 based on the positional relationship of the speakers. A distant channel may be the channel that needs to be coordinate transformed. In addition, the data conversion unit 103 selects a channel in which the speaker position defined in the 22.2 channel standard is the same as the speaker position defined in the output audio codec specification of the broadcast receiving apparatus 1 or a channel not separated by a predetermined distance or more, Channels that do not require coordinate conversion may be used. This predetermined distance is appropriately set according to the size, shape, etc. of the acoustic space.

The audio processing unit 10 incorporates the coordinate information or the speaker label information output from the speaker position information acquisition unit 104 into metadata, and attaches the metadata to the input audio data, thereby transforming channel-based audio data into object-based data. audio data. Then, the object-based audio data is output to the digital audio output section 64 . According to this, a 22.2-channel acoustic space can be constructed with object-based audio technology.

[1-3. Operation of audio processor]
Next, the operation of the audio processing section 10 will be described with reference to FIG. It should be noted that the operation shown here is for the case where it is determined that the audio channel configuration of the broadcast stream is 22.2 channels.

FIG. 8 is a diagram showing the operation of the audio processing section 10 of the broadcast receiving device 1. As shown in FIG. FIG. 8 shows an example of converting audio data corresponding to a plurality of channels one by one.

First, the audio processing unit 10 determines whether or not there is an unselected channel for which conversion processing has not been performed (step S11).

If there are unselected channels (Yes at S11), the audio processor 10 selects one of the unselected channels (step S12).

Next, the audio processing unit 10 determines whether or not the selected channel is a channel to be coordinate-transformed (step S13). Whether coordinate conversion should be performed is determined, for example, by whether the distance between the speaker position defined by the 22.2 channel standard and the speaker position defined by the output audio codec specification of the broadcast receiving apparatus 1 is equal to or greater than a threshold. determined by whether

When the audio processing unit 10 determines that the coordinates of the selected channel should be converted (Yes in S13), the audio processing unit 10 adds coordinate information to the channel-based audio data (step S14). When the audio processing unit 10 determines that the coordinates of the selected channel should not be converted (No in S13), it adds speaker label information to the channel-based audio data (step S15). In this way, the channel-based audio data is converted into object-based audio data by adding coordinate information or speaker label information to the channel-based audio data (step S16).

Then, the process returns to step S11, and these steps are repeated until there are no more unselected channels. When there are no more unselected channels (No in S11), the audio data of all channels are output to the digital audio output unit 64 (step S17). This completes the operation of the audio processing unit 10 .

In this way, the audio processing unit 10 converts channel-based audio data into object-based audio data by adding coordinate information or speaker label information to the audio data. According to this, a 22.2-channel acoustic space can be constructed with object-based audio technology.

[1-4. effects, etc.]
The broadcast receiving apparatus 1 of the present embodiment has a channel configuration for determining whether or not the audio channel configuration of the broadcast stream obtained via the tuner or the broadcast stream recorded on the optical media is 22.2 channels. A determination unit 102, a speaker position information acquisition unit 104 that acquires speaker position information defined in the 22.2 channel standard, and a channel-based audio data included in a broadcast stream that converts into object-based audio data. and a data conversion unit 103 for output. When the channel configuration is 22.2 channels, the data conversion unit 103 adds coordinate information of the speaker position to the audio data of the channel for which the coordinate conversion of the speaker position needs to be performed among the 22.2 channels, In addition, channel-based audio data is converted into object-based audio data by adding speaker label information to audio data of channels that do not require coordinate conversion of speaker positions.

In this way, by adding coordinate information or speaker label information to channel-based audio data, a 22.2-channel acoustic space can be constructed using object-based audio technology.

In addition, the data conversion unit 103 converts a channel whose speaker position defined by the 22.2 channel standard is away from the speaker position defined by the output audio codec specification of the broadcast receiving apparatus 1 by a predetermined distance or more to the speaker position. A channel that needs to be coordinate-transformed, and the speaker position defined in the 22.2 channel standard is the same channel as the speaker position defined in the output audio codec specification of the broadcast receiving device 1, or a channel that is not separated by a predetermined distance or more. may be defined as a channel that does not require coordinate transformation of speaker positions.

According to this, it is possible to accurately determine which channels need coordinate conversion of speaker positions and which channels do not need coordinate conversion. As a result, a 22.2-channel acoustic space can be accurately constructed using object-based audio technology.

Further, the broadcast receiving apparatus 1 further includes a memory 70 for storing speaker position information. good.

According to this, the data conversion unit 103 can accurately add the speaker position information to the channel-based audio data. As a result, a 22.2-channel acoustic space can be accurately constructed using object-based audio technology.

Further, the broadcast receiving apparatus 1 further includes a channel configuration information acquisition unit 101 that acquires information on the channel configuration from the broadcast stream, and the channel configuration determination unit 102 acquires information on the channel configuration from the channel configuration information acquisition unit 101. , the above determination may be performed.

According to this, the channel configuration determination unit 102 can accurately determine whether or not the audio channel configuration of the broadcast stream is 22.2 channels. Therefore, the data conversion unit 103 can accurately add the speaker position information corresponding to 22.2 channels to the audio data. As a result, a 22.2-channel acoustic space can be accurately constructed using object-based audio technology.

Also, the channel configuration determination unit 102 may acquire information about the channel configuration from the audio asset information included in the broadcast stream and perform the above determination.

According to this, the channel configuration determination unit 102 can accurately determine whether or not the audio channel configuration of the broadcast stream is 22.2 channels. Therefore, the data conversion unit 103 can accurately add the speaker position information corresponding to 22.2 channels to the audio data. As a result, a 22.2-channel acoustic space can be accurately constructed using object-based audio technology.

[1-5. Other configurations of the audio processing section]
Next, another configuration of the audio processing section will be described with reference to FIGS. 9 and 10. FIG. Here, an example of reducing the amount of audio data input to the data conversion unit 103 will be described.

FIG. 9 is a diagram showing another configuration of the audio processing section 10 of the broadcast receiving device 1. As shown in FIG.

The audio processing section 10 shown in FIG. 9 further includes a data amount adjustment section 106 in addition to the configuration shown in FIG. Data amount adjustment section 106 is provided between audio decoder 100 and data conversion section 103 and adjusts the amount of audio data input to data conversion section 103 . By providing the data amount adjustment unit 106 in the audio processing unit 10 in this way, the amount of data processed by the data conversion unit 103 can be reduced, and the amount of data output to the digital audio output unit 64 can be reduced. .

FIG. 10 is a diagram showing the configuration of the data amount adjusting section 106 of the audio processing section 10 shown in FIG. As shown in FIG. 10, data amount adjustment section 106 includes adjustment data output section 107 and channel selection section 108 .

The channel selection unit 108 selects, for example, a channel set and input by an external remote controller or the like as a channel whose data amount should be adjusted. According to this, it is possible to appropriately set the channel for adjusting the data amount based on the setting input from the outside.

Note that the channel selection unit 108 may analyze the gain of the input audio data and select a channel with a low gain as the channel for adjusting the data amount. According to this, it is possible to adjust the amount of data while suppressing deterioration in acoustic quality.

The adjusted data output unit 107 converts the bit depth of the audio data of the channel selected by the channel selection unit 108 from 24 bits to 16 bits, for example, and outputs the converted data to the data conversion unit 103 . According to this, it is possible to suppress the deterioration of the sound quality due to the adjustment of the data amount. When the processing of the adjustment data output unit 107 is conversion processing from 24 bits to 16 bits, the channel selection unit 108 may select all channels as channels for adjusting the data amount.

Adjusted data output section 107 may not output the audio data of the channel selected by channel selection section 108 to data conversion section 103 , but may output the audio data of channels other than the selected channel to data conversion section 103 . According to this, it is possible to suppress the deterioration of the sound quality due to the adjustment of the data amount.

Further, the adjusted data output unit 107 may mix the audio data of the channel selected by the channel selection unit 108 into audio data different from the channel, down-mix and output to the data conversion unit 103 . According to this, it is possible to suppress the deterioration of the sound quality due to the adjustment of the data amount.

[1-6. Modification of Embodiment 1]
Next, a broadcast receiving apparatus 1 according to a modification of Embodiment 1 will be described with reference to FIGS. 11 and 12. FIG. In the modified example, an example will be described in which the audio processing unit 10 adds coordinate information to audio data of all channels.

FIG. 11 is a diagram showing the configuration of the audio processing section 10 of the broadcast receiving device 1 according to the modification. As in the first embodiment, the audio processing unit 10 of the modification includes an audio decoder 100, a channel configuration information acquisition unit 101, a channel configuration determination unit 102, a data conversion unit 103, and a speaker position information acquisition unit 104. Prepare.

FIG. 12 is a diagram showing audio data converted by the audio processing unit 10 of the modified example. FIG. 12 shows an example in which coordinate information is added to all channel-based audio data input to the data conversion unit 103 and output as object-based audio data.

The speaker position information acquisition unit 104 acquires the coordinate information from the memory 70 based on the read access from the data conversion unit 103 and outputs it to the data conversion unit 103 .

When the channel configuration determination unit 102 determines that the audio channel configuration is 22.2 channels, the data conversion unit 103 assigns coordinate information to the audio data of all the channels, thereby converting the input data into 22.2 channels. It converts the channel-based audio data into object-based audio data and outputs it.

As described above, the broadcast receiving apparatus 1 of the modified example has a channel for determining whether or not the audio channel configuration of the broadcast stream obtained via the tuner or the broadcast stream recorded on the optical media is 22.2 channels. A configuration determination unit 102, a speaker position information acquisition unit 104 that acquires speaker position information defined in the 22.2 channel standard, and a channel-based audio data included in a broadcast stream that converts into object-based audio data. and a data conversion unit 103 for outputting the data. When the channel configuration is 22.2 channels, the data conversion unit 103 adds coordinate information of speaker positions to audio data of all channels, thereby converting channel-based audio data into object-based audio data. Convert.

According to this, it is possible to suppress deterioration in acoustic quality and construct a 22.2-channel acoustic space using object-based audio technology.

It should be noted that the audio processing unit 10 of the modified example may also include the data amount adjusting unit 106 as in the first embodiment. Data amount adjustment section 106 may include channel selection section 108 and adjustment data output section 107 .

(Embodiment 2)
Next, a broadcast receiving apparatus 1A according to Embodiment 2 will be described with reference to FIGS. 13 and 14. FIG. In the second embodiment, a case will be described where it is determined that the audio channel configuration of the broadcast stream is not 22.2 channels due to, for example, switching of broadcast programs. Also, here, a case where the channel configuration is one of 7.1 channels, 5.1 channels, 2 channels, and 1 channel will be described as an example.

FIG. 13 is a diagram showing the configuration of the audio processing section 10 of the broadcast receiving device 1A according to Embodiment 2. As shown in FIG. In the broadcast receiving apparatus 1A shown in FIG. 13, part of the first signal input section 21, the second signal input section 22, the video processing section 50, and the signal output section 60 are omitted.

As in the first embodiment, the audio processing unit 10 of the second embodiment includes an audio decoder 100, a channel configuration information acquisition unit 101, a channel configuration determination unit 102, a data conversion unit 103, and a speaker position information acquisition unit. 104.

The channel configuration determination unit 102 monitors changes in broadcast storms due to changes in broadcast programs, etc., and appropriately determines whether or not the audio channel configuration of the broadcast stream is 22.2 channels. Further, in Embodiment 2, when the channel configuration is not 22.2 channels, it is further determined whether the channel configuration is 7.1 channels, 5.1 channels, or 2 channels. , 1 channel. Channel configuration determination section 102 outputs the determination result to data conversion section 103 as channel determination information.

FIG. 14 is a diagram showing audio data converted by the audio processing unit 10 according to the second embodiment. FIG. 14 shows an example in which speaker label information is added to all channel-based audio data input to the data conversion unit 103 and output as object-based audio data.

Based on read access from the data conversion unit 103 , the speaker position information acquisition unit 104 acquires speaker label information from the memory 70 and outputs it to the data conversion unit 103 .

When the audio channel configuration is determined to be 7.1 channels, the data conversion unit 103 adds speaker label information corresponding to 7.1 channels to the audio data of all channels. Further, when the audio channel configuration is determined to be 5.1 channels, the data conversion unit 103 adds speaker label information corresponding to 5.1 channels to the audio data of all channels. Further, when it is determined that the audio channel configuration is two channels, the data conversion unit 103 adds speaker label information corresponding to two channels to the audio data of all channels. Further, when it is determined that the audio channel configuration is one channel, the data conversion unit 103 adds speaker label information corresponding to one channel to the audio data of all channels.

In this manner, the broadcast receiver 1A executes audio processing according to the channel configuration of the switched broadcast program. Then, when the broadcast program returns to the original 22.2 channel, the broadcast receiver 1A executes the audio processing shown in the first embodiment again.

As described above, in broadcast receiving apparatus 1A of Embodiment 2, channel configuration determining section 102 further determines whether or not the channel configuration is 7.1 channel. When the channel configuration is 7.1 channels, the data conversion unit 103 adds speaker label information corresponding to 7.1 channels to the audio data of all channels. This converts channel-based audio data into object-based audio data.

According to this broadcast receiver 1A, an acoustic space of not only 22.2 channels but also 7.1 channels can be constructed by object-based audio technology. Further, according to this broadcast receiving apparatus 1A, even when there is a change of broadcast programs, it is possible to suppress the occurrence of software processing overhead, and to prevent the occurrence of sound interruptions such as missing the beginning of audio data. can be suppressed.

Further, in broadcast receiving apparatus 1A of Embodiment 2, channel configuration determination section 102 further determines whether the channel configuration is 5.1 channels. When the channel configuration is 5.1 channels, the data conversion unit 103 adds speaker label information corresponding to 5.1 channels to the audio data of all channels. This converts channel-based audio data into object-based audio data.

According to this broadcast receiver 1A, an acoustic space of not only 22.2 channels but also 5.1 channels can be constructed by object-based audio technology. Further, according to this broadcast receiving apparatus 1A, even when there is a change of broadcast programs, it is possible to suppress the occurrence of software processing overhead, and to prevent the occurrence of sound interruptions such as missing the beginning of audio data. can be suppressed.

Further, in broadcast receiving apparatus 1A of Embodiment 2, channel configuration determining section 102 further determines whether or not the channel configuration is two channels. When the channel configuration is two channels, the data conversion unit 103 adds speaker label information corresponding to two channels to the audio data of all channels. This converts channel-based audio data into object-based audio data.

According to this broadcast receiver 1A, it is possible to construct a 2-channel acoustic space, not limited to 22.2 channels, using object-based audio technology. Further, according to this broadcast receiving apparatus 1A, even when there is a change of broadcast programs, it is possible to suppress the occurrence of software processing overhead, and to prevent the occurrence of sound interruptions such as missing the beginning of audio data. can be suppressed.

Further, in broadcast receiving apparatus 1A of Embodiment 2, channel configuration determining section 102 further determines whether or not the channel configuration is one channel. When the channel configuration is one channel, the data conversion unit 103 adds speaker label information corresponding to one channel to audio data of all channels. This converts channel-based audio data into object-based audio data.

According to this broadcast receiving apparatus 1A, a 1-channel acoustic space can be constructed by object-based audio technology without being limited to 22.2 channels. Further, according to this broadcast receiving apparatus 1A, even when there is a change of broadcast programs, it is possible to suppress the occurrence of software processing overhead, and to prevent the occurrence of sound interruptions such as missing the beginning of audio data. can be suppressed.

(Other embodiments)
Although the broadcast receiving apparatus according to aspects of the present disclosure has been described above based on the embodiments and the like, the present disclosure is not limited to these embodiments. For example, another embodiment realized by arbitrarily combining the constituent elements described in this specification or omitting some of the constituent elements may be an embodiment of the present disclosure. In addition, the present disclosure includes modifications obtained by making various modifications that a person skilled in the art can think of without departing from the gist of the present disclosure, that is, the meaning indicated by the words described in the claims, with respect to the above-described embodiment. be

In addition, the forms shown below may also be included within the scope of one or more aspects of the present disclosure.

(1) Some of the constituent elements of the broadcast receiver may be a computer system comprising a microprocessor, ROM, RAM, hard disk unit, display unit, keyboard, mouse, and the like. A computer program is stored in the RAM or hard disk unit. The function is achieved by the microprocessor operating according to the computer program. Here, the computer program is constructed by combining a plurality of instruction codes indicating instructions to the computer in order to achieve a predetermined function.

(2) Some of the components that make up the above broadcast receiving apparatus may be made up of one system LSI (Large Scale Integration). A system LSI is an ultra-multifunctional LSI manufactured by integrating multiple components on a single chip. Specifically, it is a computer system that includes a microprocessor, ROM, RAM, etc. . A computer program is stored in the RAM. The system LSI achieves its functions by the microprocessor operating according to the computer program.

(3) Some of the constituent elements that make up the above broadcast receiving device may be composed of an IC card or a single module that can be attached to and detached from each device. The IC card or module is a computer system composed of a microprocessor, ROM, RAM and the like. The IC card or the module may include the super multifunctional LSI. The IC card or the module achieves its function by the microprocessor operating according to the computer program. This IC card or this module may be tamper resistant.

(4) In addition, some of the components that make up the above-described broadcast receiving device include a computer-readable recording medium for the computer program or the digital signal, such as a flexible disk, hard disk, CD-ROM, MO, DVD , DVD-ROM, DVD-RAM, BD (Blu-ray (registered trademark) Disc), semiconductor memory, or the like. Moreover, it may be the digital signal recorded on these recording media.

In addition, some of the components that make up the above broadcast receiving device transmit the computer program or the digital signal via an electric communication line, a wireless or wired communication line, a network represented by the Internet, data broadcasting, etc. It may be transmitted.

(5) The present disclosure may be the method shown above. Moreover, it may be a computer program for realizing these methods by a computer, or it may be a digital signal composed of the computer program.

(6) The present disclosure may also be a computer system comprising a microprocessor and memory, the memory storing the computer program, and the microprocessor operating according to the computer program. .

(7) In addition, by recording the program or the digital signal on the recording medium and transferring it, or by transferring the program or the digital signal via the network or the like, another independent computer It may be performed by the system.

(8) You may combine the said embodiment and the said modified example, respectively.

The broadcast receiving device of the present disclosure can be used for televisions, Blu-ray recorders, Blu-ray players, set-top boxes, and the like.

1, 1A broadcast receiver 10 audio processing unit 21 first signal input unit 22 second signal input unit 40 separation control unit 50 video processing unit 60 signal output unit 61 video output unit 62 digital video/audio output unit 63 audio output unit 64 Digital audio output unit 70 Memory 100 Audio decoder 101 Channel configuration information acquisition unit 102 Channel configuration determination unit 103 Data conversion unit 104 Speaker position information acquisition unit 106 Data amount adjustment unit 107 Adjustment data output unit 108 Channel selection unit

Claims (16)

a channel configuration determining unit that determines whether or not the audio channel configuration of the broadcast stream obtained via the tuner or the broadcast stream recorded on the optical media is 22.2 channels;
A speaker position information acquisition unit that acquires speaker position information defined in the 22.2 channel standard;
a data converter that converts channel-based audio data included in the broadcast stream into object-based audio data and outputs the data,
When the channel configuration is 22.2 channels, the data conversion unit converts the coordinate information of the speaker position to the audio data of the channel for which the coordinate conversion of the speaker position needs to be performed among the 22.2 channels. and assigning speaker label information to the audio data of channels for which coordinate conversion of the speaker positions is unnecessary, thereby converting the channel-based audio data into the object-based audio data. receiving device. The data conversion unit
For a channel where the speaker position defined by the 22.2 channel standard is separated from the speaker position defined by the output audio codec specification of the broadcast receiving device by a predetermined distance or more, it is necessary to perform coordinate transformation of the speaker position. Let a channel be
If the speaker position defined by the 22.2 channel standard is the same channel as the speaker position defined by the output audio codec specification of the broadcast receiving device or is not separated by the predetermined distance or more, the coordinate transformation of the speaker position is performed. 2. The broadcast receiving apparatus according to claim 1, wherein the channel does not need to perform a channel configuration determining unit that determines whether or not the audio channel configuration of the broadcast stream obtained via the tuner or the broadcast stream recorded on the optical media is 22.2 channels;
A speaker position information acquisition unit that acquires speaker position information defined in the 22.2 channel standard;
a data converter that converts channel-based audio data included in the broadcast stream into object-based audio data and outputs the data,
When the channel configuration is 22.2 channels, the data conversion unit converts the channel-based audio data to the object-based audio data by adding the coordinate information of the speaker positions to the audio data of all the channels. A broadcasting receiver that converts audio data into Furthermore, comprising a memory for storing information on the speaker position,
The broadcast receiving apparatus according to any one of claims 1 to 3, wherein the speaker position information acquisition section acquires the information on the speaker position from the memory and outputs the information to the data conversion section. further comprising a channel configuration information acquisition unit that acquires information about the channel configuration from the broadcast stream;
The broadcast receiving apparatus according to any one of claims 1 to 4, wherein the channel configuration determination section acquires information about the channel configuration from the channel configuration information acquisition section and performs the determination. The broadcast receiving apparatus according to any one of claims 1 to 4, wherein the channel configuration determination unit acquires information regarding the channel configuration from audio asset information included in the broadcast stream and performs the determination. The broadcast receiving apparatus according to any one of claims 1 to 6, further comprising a data amount adjustment section that adjusts the data amount of the audio data input to the data conversion section. The data amount adjustment unit
a channel selection unit that selects a channel for adjusting the data amount;
The broadcast receiving apparatus according to claim 7, further comprising an adjusted data output unit that converts the bit depth of the audio data of the channel selected by the channel selection unit from 24 bits to 16 bits and outputs the converted data to the data conversion unit. The data amount adjustment unit
a channel selection unit that selects a channel for adjusting the data amount;
8. The adjusted data output unit according to claim 7, further comprising an adjustment data output unit that does not output audio data of a channel selected by the channel selection unit to the data conversion unit, and outputs audio data of channels other than the selected channel to the data conversion unit. Broadcast receiver. The data amount adjustment unit
a channel selection unit that selects a channel for adjusting the data amount;
8. The broadcast receiving apparatus according to claim 7, further comprising an adjusted data output section that mixes the audio data of the channel selected by the channel selection section into audio data different from the channel and outputs the mixed audio data to the data conversion section. The broadcast receiving apparatus according to any one of claims 8 to 10, wherein the channel selection section selects a channel set and input from the outside as a channel for adjusting the data amount. The broadcast receiving apparatus according to any one of claims 8 to 10, wherein the channel selection section selects a channel with a low gain of the audio data as a channel for adjusting the data amount. The channel configuration determination unit further determines whether the channel configuration is 7.1 channels,
13. The data converter according to any one of claims 1 to 12, wherein, when the channel configuration is 7.1 channels, the speaker label information corresponding to the 7.1 channels is added to the audio data of all channels. 1. The broadcast receiving device according to item 1. The channel configuration determination unit further determines whether the channel configuration is 5.1 channels,
13. The data converter according to any one of claims 1 to 12, wherein, when the channel configuration is 5.1 channels, the speaker label information corresponding to the 5.1 channels is added to the audio data of all channels. 1. The broadcast receiving device according to item 1. The channel configuration determination unit further determines whether the channel configuration is two channels,
13. The data conversion unit according to any one of claims 1 to 12, wherein when the channel configuration is 2 channels, the speaker label information corresponding to the 2 channels is added to the audio data of all channels. broadcasting receiver. The channel configuration determining unit further determines whether the channel configuration is one channel,
13. The data conversion unit according to any one of claims 1 to 12, wherein when the channel configuration is 1 channel, the speaker label information corresponding to the 1 channel is added to the audio data of all channels. broadcasting receiver.

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