JP2012138670A - Digital broadcast receiver, digital broadcast receiver control method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver, a digital broadcast receiver control method, and a control program capable of reducing discomfort felt when switching between television voice reproduction and caption voice reproduction.SOLUTION: A digital broadcast receiver 10 which receives digital television broadcast containing caption data on television voice and reproduces images and voices is provided with: a caption voice generation part 17 which generates caption voice for reading out a caption on the basis of the caption data, while voice reproduction is interrupted; and a caption voice adjustment part 22 which adjusts the caption voice in accordance with the characteristics of the program content or the television voice of the digital television broadcast.

Description

  The present invention relates to a digital broadcast receiving apparatus that selectively displays subtitles based on subtitle data, a control method for the digital broadcast receiving apparatus, and a control program.

Conventionally, a video signal and an audio signal used for digital broadcasting are each digitally compressed and encoded to be a video elementary stream (ES) and an audio elementary stream. These video elementary streams or audio elementary streams are divided into packets of appropriate size and packetized to form PES (Packetized Elementary Stream). Further, these PESs are connected in time series to be a video transfer stream (TS) and an audio transfer stream.
When subtitle broadcasting is performed by digital broadcasting, the subtitle data is converted into an elementary stream after encoding. The elementary stream is divided and packetized into an appropriate size to form a PES, which is connected in time series and is transferred to the subtitle. Stream (TS).
These video transfer stream, audio transfer stream, and subtitle transfer stream are multiplexed into one transfer stream TS and transmitted as a digital broadcast signal (see, for example, Patent Document 1).

On the digital broadcast receiver side, the received multiplexed signal is separated into a video transfer stream, an audio transfer stream, and a caption transfer stream in a procedure reverse to the above-described procedure, and then decoded to obtain the original video signal, audio signal, and caption signal. I was trying.
By the way, a caption signal in digital broadcasting is a closed caption, which is different from a caption (open caption) in analog broadcasting, and display / non-display setting or selection can be set or selected on the transmission side or the reception side.
Also, when subtitle broadcasting is performed, when synchronizing with video and audio, the display timing of subtitles becomes a problem, but synchronization with video and audio is performed using a mechanism called a time stamp.

JP 2003-046960 A

By the way, in the terrestrial digital television broadcasting, when the radio wave condition is deteriorated, the video cannot be displayed first, and then the sound reproduction is interrupted.
In particular, in the in-vehicle digital broadcast receiving apparatus, since the driver grasps the broadcast content by sound, if the sound is interrupted, the broadcast content cannot be grasped at all.
In this case, it is conceivable to reproduce the audio based on the caption data. However, if a certain audio is used, the difference between the normal TV sound and the subtitle sound based on the subtitle data becomes large, and the normal audio reproduction is performed. And the subtitle sound reproduction based on the subtitle data may cause the user to feel uncomfortable.
The present invention has been made in view of the above-described circumstances, and provides a digital broadcast receiving apparatus, a control method for a digital broadcast receiving apparatus, and a control program capable of reducing a sense of incongruity when switching between TV sound and subtitle sound. The purpose is to provide.

In order to achieve the above-mentioned object, the present invention receives a digital television broadcast including television audio subtitle data and reproduces video and audio while the audio reproduction is interrupted. A subtitle audio generation unit that generates subtitle audio that reads out subtitles based on subtitle data, and a subtitle audio adjustment unit that adjusts the subtitle audio in accordance with the program content of the digital TV broadcast or the characteristics of the TV audio. It is characterized by that.
According to the above configuration, the subtitle audio generation unit that generates the subtitle audio that reads out the subtitle based on the subtitle data while the audio reproduction is interrupted includes the subtitle audio generation unit. Subtitle audio can be played back based on the data. In addition, since it has a subtitle audio adjustment unit that adjusts subtitle audio in accordance with digital TV broadcast program content or TV audio characteristics, the difference between normal TV audio and subtitle audio based on subtitle data is reduced. It is possible to reduce a sense of incongruity when switching between reproduction and subtitle audio reproduction based on subtitle data.

  In the above configuration, a data broadcast acquisition unit that acquires a data broadcast may be provided, and the subtitle audio adjustment unit may adjust the subtitle audio in accordance with the caption data or speaker information included in the data broadcast.

  In the above configuration, a data broadcast acquisition unit that acquires data broadcast may be provided, and the caption audio adjustment unit may adjust the caption audio in accordance with program information included in the data broadcast.

  In the above configuration, the audio data storage unit for storing the TV audio is provided, and the subtitle audio adjusting unit is stored in the audio data storage unit according to the characteristics of the TV audio before audio reproduction is interrupted. May be adjusted.

  The present invention also provides a method for controlling a digital broadcast receiving apparatus that receives a digital television broadcast including subtitle data of character television audio and reproduces video and audio, while the audio reproduction is interrupted. The subtitle sound that reads out the subtitle is generated based on the above, and the subtitle sound is adjusted according to the program content of the digital television broadcast or the characteristics of the TV sound.

  According to another aspect of the present invention, there is provided a control program for controlling a digital broadcast receiving apparatus that receives digital television broadcast including television audio subtitle data and reproduces video and audio by the control unit. Generate subtitle sound for reading out subtitles based on the subtitle data while playback is interrupted, and function as means for adjusting the subtitle sound in accordance with the program content of the digital TV broadcast or the characteristics of the TV sound It is characterized by.

  According to the present invention, even when the TV sound is interrupted, the subtitle sound can be reproduced based on the subtitle data, and the difference between the normal TV sound and the subtitle sound based on the subtitle data is reduced. It is possible to reduce a sense of incongruity when switching between TV sound reproduction and caption sound reproduction based on caption data.

1 is a schematic configuration block diagram of an in-vehicle digital broadcast receiver according to an embodiment of the present invention. It is a schematic block diagram of a caption decoder unit. It is explanatory drawing of an example of the format of a digital broadcast signal. It is a figure which shows a database, (A) is a figure which shows a program information database, (B) is a figure which shows a speaker database. It is a flowchart which shows an audio | voice reproduction | regeneration monitoring process. It is a flowchart which shows a caption audio | voice reproduction | regeneration process.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, a vehicle-mounted in-vehicle digital broadcast receiver is illustrated as the digital broadcast receiver.
FIG. 1 is a schematic block diagram of the in-vehicle digital broadcast receiving apparatus according to the present embodiment.
The in-vehicle digital broadcast receiver 10 is installed on, for example, a console panel of a vehicle. The in-vehicle digital broadcast receiving apparatus 10 is connected to an external antenna 11 for receiving terrestrial digital TV broadcast, and a signal related to terrestrial digital TV broadcast (hereinafter simply referred to as a digital broadcast signal) via this antenna. ). This in-vehicle digital broadcast receiver 10 includes a control unit 22, an input unit 23, a tuner unit 12, a transfer stream decoder unit 13, a video decoder unit 14, an audio decoder unit 15, a subtitle decoder unit 16, A data broadcast decoder unit (data broadcast acquisition unit) 24, an audio synthesis unit (caption audio generation unit) 17, an audio processing unit 19, a video processing unit 21, and a storage unit 60 are provided.

The control unit 22 includes a CPU, a ROM, a RAM, other peripheral circuits, and the like, and centrally controls each unit constituting the in-vehicle digital broadcast receiving device 10. In addition, the control unit 22 includes a character recognition unit 22A that recognizes characters and a voice data analysis unit 22B that analyzes voice data.
The input unit 23 is connected to an input device such as a keyboard and a mouse, an operation switch provided in the in-vehicle digital broadcast receiving apparatus 10 main body, a receiver that receives a signal from a remote controller (not shown), and the like. Various instruction inputs including program selection to the digital broadcast receiving apparatus 10 are detected and output to the control unit 22.

The tuner unit 12 demodulates the digital broadcast signal received by the external antenna 11 under the control of the control unit 22 to generate a broadcast signal, and outputs the broadcast signal to the transfer stream decoder unit 13.
The transfer stream decoder unit 13 controls the video PES, audio PES, subtitle PES, and data broadcast data corresponding to the program selected by the user from the transfer stream format broadcast signal input from the tuner unit 12 under the control of the control unit 22. The video PES is output to the video decoder unit 14, the audio PES is output to the audio decoder unit 15, the subtitle PES is output to the subtitle decoder unit 16, and the data broadcast is output to the data broadcast decoder unit 24 as data broadcast data. In addition, when the video data, audio data, caption data, and data broadcast cannot be extracted, the transfer stream decoder unit 13 outputs each error data to the control unit 22.

Under the control of the control unit 22, the video decoder unit 14 decodes the video PES input from the transfer stream decoder unit 13 and outputs the decoded video PES to the video processing unit 21.
The audio decoder unit 15 decodes the audio PES input from the transfer stream decoder unit 13 under the control of the control unit 22 and outputs the decoded audio signal SA to the audio processing unit 19. The audio decoder unit 15 outputs the combined audio data to the control unit 22.
The subtitle decoder unit 16 decodes the subtitle PES (independent PES) input from the transfer stream decoder unit 13 under the control of the control unit 22, and outputs the subtitle signal SC to the video processing unit 21 and the subtitle data DC to the voice synthesis unit. 17 to output. In addition, the caption decoder unit 16 outputs the combined caption data to the control unit 22.

The data broadcast decoder unit 24 decodes the data broadcast data input from the transfer stream decoder unit 13 under the control of the control unit 22 and outputs the decoded data broadcast data SD to the video processing unit 21. That is, the data broadcast decoder unit 24 acquires a data broadcast. Further, the data broadcast decoder unit 24 outputs the combined data broadcast data to the control unit 22.
The data broadcast data includes program information, program arrangement information, and the like. As data related to the program information, the genre of each program (for example, news program, sports program, drama program, movie program, animation program, etc.) ), Data indicating the titles of individual programs, data on keywords (for example, names of performers and roles) that characterize the individual programs, and the like.

Under the control of the control unit 22, the voice synthesis unit 17 generates subtitle audio that reads out the subtitle based on the subtitle data DC, and outputs the subtitle audio to the audio processing unit 19 as a subtitle audio signal SCA.
The audio processing unit 19 includes a D / A converter, an amplifier, and the like, performs various processes on the audio signal SA or the caption audio signal SCA, and outputs the processed signal to the external speaker 18.
The video processing unit 21 performs various types of video processing on the video signal SG, the caption signal SC, and the data broadcast signal SD, and outputs them to the display 20. The display 20 includes a display such as a liquid crystal display, an organic EL display, or a CRT display, and displays an image such as a television screen on the display display based on the video signal SG input from the video processing unit 21.

  The storage unit 60 includes a storage device such as a hard disk or an EEPROM, and stores various data in a rewritable manner under the control of the control unit 22. The storage unit 60 includes an audio data storage unit 60A that stores the audio data output from the audio decoder unit 15, a subtitle data storage unit 60B that stores subtitle data output from the subtitle decoder unit 16, and an output from the data broadcast decoder unit 24. A data broadcast data storage unit 60C for storing the data broadcast data, a speaker storage unit 60D for storing the speaker database 61 (see FIG. 4), and a program information storage unit for storing the program information database 62 (see FIG. 4) 60E.

FIG. 2 is a schematic configuration block diagram of the caption decoder unit 16.
The subtitle decoder unit 16 is roughly divided into a data analysis unit 25 that analyzes subtitle data, a subtitle control unit 26 that generates and outputs a subtitle signal SC and subtitle data DC based on the analysis result of the data analysis unit 25, It has.
The data analysis unit 25 receives the subtitle PES, performs code analysis of the input subtitle PES, extracts control information and character information, and outputs the control information and the control extracted by the code analysis unit 27 Control information analysis that analyzes information and outputs display control information such as subtitle character display position, subtitle character display start timing (PTS: Presentation Time Stamp), subtitle character display size, and subtitle character display color as analysis results And a character information analysis unit 29 that analyzes the character information extracted by the code analysis unit 27 and outputs character control information such as character codes of subtitle characters and external character information as an analysis result.

FIG. 3 is an explanatory diagram of an example of a format of a digital broadcast signal.
The digital broadcast signal 30 includes a video transfer stream 31, an audio transfer stream 32, a caption transfer stream 33, and a data broadcast transfer stream 34.
The video transfer stream 31, the audio transfer stream 32, and the subtitle transfer stream 33 have the same configuration. More specifically, the video transfer stream 31 includes a transfer stream header 41 that represents the head of the transfer stream, and a video PES 42 that stores actual video data. The audio transfer stream 32 includes a transfer stream header 44 that represents the head of the transfer stream, and an audio PES 45 that stores actual audio data. The subtitle transfer stream 33 includes a transfer stream header 47 that represents the head of the transfer stream, and a subtitle PES 48 that stores actual subtitle data. The data broadcast transfer stream 34 includes a transfer stream header 71 representing the head of the transfer stream, and a data broadcast packet 72 in which actual data broadcast is stored.

Here, the caption PES will be described in more detail.
The caption PES 48 includes a PES header 51 that represents the type of stored caption data (synchronous or asynchronous) and PES data 52 that stores a plurality of sets of actual caption data.
The PES data 52 includes a header 53 indicating the head portion of the PES data 52, data group data 54 in which information corresponding to a plurality of sets of caption data is stored, and CRC data in which a CRC code for error detection is stored. 55.
The data group data 54 includes a control information unit 56 that stores various control information including display start timing (PTS) of subtitle characters, and a subtitle data group 58 that includes a data unit 57 that stores actual subtitle data. Are provided.
The data unit 57 stores character position, character size information, color information, character interval designation information, line interval designation information, character code of subtitle text, external character information such as a bitmap image of non-standard characters, and the like.

4 is a diagram showing a database, FIG. 4 (A) is a diagram showing a speaker database 61, and FIG. 4 (B) is a diagram showing a program information database 62.
As shown in FIG. 4A, in one record of the speaker database 61, a speaker name field 61A indicating the name of the speaker and a voice adjustment information field 61B in which data indicating the voice adjustment information are stored. And are included. The audio adjustment information stores parameters for changing the voice quality and tone of the default subtitle audio.
As shown in FIG. 4B, in one record of the program information database 62, a program information field 62A in which data indicating program information is stored, and audio adjustment information in which data indicating audio adjustment information is stored. Field 62B. The program information stores a program genre, a title, and a keyword. For example, in a record whose program genre is a news program, sound adjustment information PG1 for changing the default subtitle sound into a calm tone is stored.

Next, the operation of the present embodiment will be described with reference to FIGS.
The tuner unit 12 of the in-vehicle digital broadcast receiving apparatus 10 demodulates the digital broadcast signal received via the external antenna 11 and outputs the demodulated signal to the transfer stream decoder unit 13.
The transfer stream decoder unit 13 decodes the transfer stream from the broadcast signal, outputs the video PES 42 to the video decoder unit 14, outputs the audio PES 45 to the audio decoder unit 15, and outputs the subtitle PES 48 to the subtitle decoder unit 16.

As a result, the video decoder unit 14 decodes the video PES 42 and outputs the decoded video signal SG to the video processing unit 21.
Further, the audio decoder unit 15 decodes the audio PES 45 and outputs the decoded audio signal SA to the audio processing unit 19.
The data analysis unit 25 of the subtitle decoder unit 16 performs code analysis of the subtitle PES 48 input by the code analysis unit 27, extracts the control information unit 56 that is control information, and outputs the control information unit 56 to the control information analysis unit 28. . The code analysis unit 27 extracts the data unit 57 that is character information and outputs the data unit 57 to the character information analysis unit 29.

As a result, the control information analysis unit 28 analyzes the control information extracted by the code analysis unit 27 and displays the display position of the subtitle character, the display start timing (PTS) of the subtitle character, the display size of the subtitle character, and the subtitle character display. Display control information such as the display color is output to the caption control unit 26 as an analysis result.
On the other hand, the character information analysis unit 29 analyzes the character information extracted by the code analysis unit 27 and outputs character control information such as the character code of the subtitle character and the external character information to the subtitle control unit 26 as the analysis result.

Then, the caption control unit 26 generates a caption signal SC based on the display control information and the character control information, and outputs it to the video processing unit 21. In the present embodiment, since the caption is a closed caption, the caption signal SC is not output to the video processing unit 21 when the display setting is not made.
The subtitle control unit 26 generates subtitle data DC and outputs the subtitle data DC to the voice synthesis unit 17.

By the way, the control unit 22 monitors the operation state of the transfer stream decoder unit 13 and always monitors whether the radio wave state has deteriorated and the audio decoder unit 15 cannot reproduce normal audio (television audio). Yes.
When the audio decoder unit 15 determines that the audio cannot be reproduced, the audio synthesis unit 17 performs audio synthesis based on the subtitle data DC output from the subtitle decoder unit 16, and the audio processing unit 19. Thus, the subtitle sound is played back.

FIG. 5 is a flowchart showing the audio reproduction monitoring process.
First, the control unit 22 monitors the operation state of the transfer stream decoder unit 13 (step S11), and determines whether or not video reproduction is possible (step S12). At this time, if the error data of the video data is not input from the transfer stream decoder unit 13, the control unit 22 determines that video playback is possible.
If it is determined in step S12 that video playback is possible (step S12; Yes), the control unit 22 stores audio data in the audio data storage unit 60A (step S13). The audio data storage unit 60A stores audio data for a predetermined time or a predetermined amount.
Next, the control unit 22 causes the video processing unit 21 to perform video reproduction based on the video signal SG, and causes the audio processing unit 19 to reproduce audio based on the audio signal SA (step S14), and the process is performed again in step S11. The same processing is performed thereafter.

  If it is determined in step S12 that video reproduction is not possible (step S12; No), the control unit 22 determines whether audio reproduction is possible based on the operating state of the transfer stream decoder unit 13. (Step S15). At this time, if the error data of the audio data is not input from the transfer stream decoder unit 13, the control unit 22 determines that audio reproduction is possible.

If it is determined in step S15 that sound reproduction is possible (step S15; Yes), the control unit 22 stores the sound data in the sound data storage unit 60A (step S16), and the sound processing unit 19 stores the sound signal. Audio reproduction is performed based on SA (step S17), the process is shifted again to step S11, and the same process is performed thereafter.
If it is determined in step S15 that audio reproduction is not possible (step S15; No), since subtitle audio needs to be reproduced, the control unit 22 performs subtitle audio reproduction processing (step S18). The process proceeds to step S11.

FIG. 6 is a flowchart showing subtitle audio reproduction processing.
In the caption audio reproduction processing, the control unit 22 functions as a caption audio adjustment unit that adjusts the caption audio generated by the audio synthesis unit 17.
First, when the audio reproduction is interrupted, the control unit 22 causes the audio synthesis unit 17 to generate subtitle audio from the subtitle data DC (step S21). At this time, the subtitle sound generated by the sound synthesizer 17 is the default subtitle sound.
Next, the control unit 22 determines whether there is data broadcasting (step S22). At this time, if the error data of the data broadcast is not input from the transfer stream decoder unit 13, the control unit 22 determines that there is a data broadcast.

If it is determined in step S22 that there is a data broadcast (step S22; Yes), the control unit 22 adjusts the caption audio according to the program content included in the data broadcast (step S23).
More specifically, the control unit 22 causes the character recognition unit 22A to recognize the characters of the caption data stored in the caption data storage unit 60B, and specifies the speaker name such as the performer name or the role name in the caption data. It is determined whether or not person information is included. For example, in the drama program, the movie program, and the animation program, the control unit 22 recognizes the role name added to the beginning of the caption as the speaker information. Further, the control unit 22 causes the character recognition unit 22A to recognize the characters of the data broadcast stored in the data broadcast data storage unit 60C, and compares the data broadcast with the speaker information included in the caption data. Thus, the speaker name may be specified.

  And the control part 22 specifies the record containing a speaker name with reference to the speaker name field 61A of the speaker database 61 memorize | stored in the speaker memory | storage part 60D. When the control unit 22 specifies the record including the speaker name, the control unit 22 outputs the voice adjustment information of the specified record to the voice synthesis unit 17 to adjust the default subtitle voice, and the voice synthesis unit 17 receives the adjusted subtitle voice. The subtitle audio signal SCA is output.

  When the speaker information cannot be specified or when the record indicating the specified speaker name cannot be specified, the control unit 22 outputs the default subtitle sound as the subtitle audio signal SCA to the voice synthesis unit 17. Let At this time, the control unit 22 may adjust the caption audio according to the program information of the program selected by the user with reference to the program information database 62 stored in the program information storage unit 60E. For example, when the program selected by the user is a news program, the control unit 22 refers to the program information field 62A of the program information database 62 and specifies a record including the program information of the program selected by the user. When the control unit 22 identifies the record including the program information, the control unit 22 adjusts the default subtitle sound to a calm sound using the sound adjustment information of the identified record.

If it is determined in step S22 that there is no data broadcast (step S22; No), the control unit 22 adjusts and reproduces the subtitle sound in accordance with the characteristics of the television sound before interruption (step S24).
More specifically, the control unit 22 causes the audio data analysis unit 22B to analyze the audio data stored in the audio data storage unit 60A. And the control part 22 produces | generates audio | voice adjustment information from the analysis results, such as a frequency, outputs the produced | generated audio | voice adjustment information to the audio | voice synthesis | combination part 17, adjusts a default subtitle audio | voice, and adjusted to the audio | voice synthesis | combination part 17. The caption audio is output as the caption audio signal SCA.

Next, the control unit 22 causes the audio processing unit 19 to reproduce the adjusted subtitle audio (step SS25). The audio processing unit 19 performs various processes on the adjusted subtitle audio signal SCA and outputs the processed subtitle audio signal SCA to the external speaker 18, so that the subtitle audio that matches the audio characteristics of the speaker is reproduced from the external speaker 18.
As a result, even if the sound is interrupted as well as the video due to the deterioration of the radio wave condition, the subtitle audio is reproduced based on the subtitle data. You can easily grasp the situation.
Especially in the in-car TV receiver, the driver cannot watch the TV screen, so if the sound is interrupted as well as the video, the broadcast contents could not be grasped at all in the past. . In this embodiment, since the subtitle sound is reproduced when the sound is interrupted, the driver can grasp the broadcast content. In addition, subtitle sound is adjusted according to the program contents such as program information and speaker information or the TV sound before interruption, so that the discomfort when switching between normal audio playback and subtitle audio playback based on subtitle data is minimized. Can be suppressed.

  In the reproduction of subtitle audio in step S25, the control unit 22 performs the adjustment performed in step S23 or step S24 on the subtitle audio based on the next subtitle when reproduction of the subtitle audio based on a single subtitle is completed. The subtitle sound based on the next subtitle may be reproduced as the default subtitle sound. Here, as one subtitle, for example, a subtitle included in one or a plurality of data units 57, or a subtitle included in one or a plurality of subtitles PES48 can be cited.

  As described above, according to the present embodiment, the audio synthesizing unit 17 that generates subtitle audio that reads out subtitles based on the subtitle data while the audio reproduction is interrupted, and the program content of the digital television broadcast are matched. A control unit 22 that adjusts subtitle audio and a data broadcast decoder unit 24 that acquires data broadcast, and the control unit 22 adjusts subtitle audio in accordance with program contents such as program information and speaker information. did. For this reason, even if the sound is interrupted as well as the video due to the deterioration of radio wave conditions, the subtitle audio can be played back based on the subtitle data, and the viewer user can see what program the user is watching. Can easily grasp the situation. Moreover, since the caption audio is adjusted according to the program information and speaker information, the difference between normal TV audio and subtitle audio based on subtitle data is reduced, and normal audio playback and subtitle audio playback based on subtitle data are reduced. Discomfort when switching to can be reduced.

  In addition, according to the present embodiment, the audio data storage unit 60A for storing the TV audio is provided, and the control unit 22 matches the characteristics of the TV audio stored in the audio data storage unit 60A before the audio reproduction is interrupted. The subtitle audio is adjusted. For this reason, for example, even when there is no data broadcast, the subtitle audio is adjusted according to the TV audio before the break, so the difference between the normal TV audio and the subtitle audio based on the subtitle data is reduced, and the normal audio is reduced. It is possible to reduce a sense of incongruity when switching between reproduction and subtitle audio reproduction based on subtitle data.

However, the above embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above embodiment, in step S23, the control unit 22 adjusts the default subtitle sound in accordance with the program content when the audio adjustment information cannot be specified from the speaker information. The default subtitle sound may be adjusted directly in accordance with the program content without trying to specify.
In the above embodiment, program information is acquired from a data broadcast included in a digital television broadcast. However, program information may be acquired via a network.

  In the above-described embodiment, the digital broadcast receiving apparatus is described as an in-vehicle digital broadcast receiving apparatus. However, the digital broadcast receiving apparatus is built in a mobile terminal such as a mobile phone, a PND (Personal Navigation Device), or a game machine. It may be a portable digital broadcast receiver or a stationary digital broadcast receiver.

10 In-vehicle digital broadcast receiver (digital broadcast receiver)
17 Speech synthesis unit (Subtitle audio generation unit)
22 Control unit (Subtitle audio adjustment unit)
24 Data broadcast decoder section (data broadcast acquisition section)
25 storage unit 25A voice data storage unit

Claims (6)

In a digital broadcast receiving apparatus that receives a digital TV broadcast including TV audio subtitle data and reproduces video and audio,
A subtitle audio generation unit that generates subtitle audio that reads out subtitles based on the subtitle data while audio reproduction is interrupted;
A subtitle audio adjustment unit that adjusts the subtitle audio in accordance with the program content of the digital TV broadcast or the characteristics of the TV audio;
A digital broadcast receiver characterized by comprising: It has a data broadcast acquisition unit that acquires data broadcasts,
The digital broadcast receiving apparatus according to claim 1, wherein the subtitle audio adjusting unit adjusts the subtitle audio in accordance with speaker information included in the subtitle data or the data broadcast. It has a data broadcast acquisition unit that acquires data broadcasts,
The digital broadcast receiving apparatus according to claim 1, wherein the subtitle audio adjusting unit adjusts the subtitle audio in accordance with program information included in the data broadcast. An audio data storage unit for storing the TV audio;
2. The digital broadcast reception according to claim 1, wherein the subtitle audio adjusting unit adjusts the subtitle audio in accordance with the characteristics of the television audio stored in the audio data storage unit before the audio reproduction is interrupted. apparatus. In a control method of a digital broadcast receiving apparatus that receives a digital TV broadcast including caption data of TV audio and reproduces video and audio,
Generating subtitle sound for reading out subtitles based on the subtitle data while audio reproduction is interrupted, and adjusting the subtitle sound in accordance with the program content of the digital TV broadcast or the characteristics of the TV sound. To control a digital broadcast receiving apparatus. In a control program for controlling a digital broadcast receiving apparatus that receives digital TV broadcast including caption data of TV audio and reproduces video and audio by a control unit,
While the audio playback is interrupted, the control unit generates subtitle sound that reads out the subtitle based on the subtitle data, and adjusts the subtitle sound in accordance with the program content of the digital TV broadcast or the characteristics of the TV sound. A control program which is made to function as a means to perform.

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