JP4661443B2 - Digital broadcast receiver - Google Patents

Description

  The present invention relates to a digital broadcast receiver that reproduces built-in sound data and sound effect sound data included in a received digital broadcast.

  In recent years, in digital broadcasting such as BS, CS, and terrestrial digital, which are widely used, it is possible for a user to use an interactive service or the like by operating on a screen of a digital broadcasting receiver. When the user selects a menu displayed on the screen or presses a button on the content being played in order to use such a service, the user is fed back that these operations have been performed. For generating sound effects.

  Audio data output as sound effects in digital broadcasting includes built-in sound data built in the receiver and audio data included in the received data broadcast content.

  It is determined by the broadcast station side that these audio data are output as sound effects alone or synthesized with audio data of a broadcast program. This instruction on the broadcast station side is described in a BML document included in the data broadcast content.

Patent Document 1 describes a method of synthesizing audio data built in a receiver with program audio. By this method, the receiver built-in sound can be synthesized with the program sound by a simple process.
JP 2003-23581 A

  However, if the audio data is output at a high level until just before the playback end time of the audio data, noise may be generated due to a sudden decrease in the audio level at the end of the playback. There was a problem.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a digital broadcast receiver that suppresses generation of noise at the end of reproduction of audio data.

  In order to achieve the above object, a digital broadcast receiver according to claim 1 of the present invention, which receives a digital broadcast wave by a receiving means and reproduces a broadcast program, uses sound effect data unique to this receiver. Storage means for storing certain first sound effect data, extraction means for extracting second sound effect data that is sound effect data included in the digital broadcast wave received by the receiving means, and first and second Generating at least one of the sound effect data, and generating new sound effect data by concatenating the end of the acquired sound effect data with silence data whose data content is silence; A digital broadcast receiver comprising: a playback means for playing back the generated new sound effect data. The sound effect data means that the receiver is operated from the outside. A predetermined length of audio data to be reproduced.

  According to the digital broadcast receiver of the present invention, silence data is connected to the end of audio data and reproduced, thereby generating a silence reproduction period during which no sound is output between the end time of audio output and the end time of reproduction. The generation of noise at the end of playback can be suppressed.

<First Embodiment>
<< Configuration of Digital Broadcasting Receiver 10 >>
A digital broadcast receiver 10 according to a first embodiment of the present invention will be described with reference to FIG.

  The digital broadcast receiver 10 of this embodiment separates a broadcast 11 received by an antenna 30 into a tuner 11 that demodulates and digitizes the digital broadcast data, and compresses the broadcast data into compressed broadcast video data and compressed broadcast audio data. A demultiplexing unit 12 for sending out, a broadcast video data decoding unit 13 for decompressing and decoding the compressed broadcast video data, a broadcast audio data decoding unit 14 for decompressing and decoding the compressed broadcast audio data, Effects of reproducing audio data in a graphics video mixing unit 15 that superimposes the decoded broadcast video data and graphics data included in menu screen data or data broadcast content, and a non-volatile memory 22 or an audio data memory 24 described later. The sound reproduction unit 16, the decoded broadcast audio data, and the built-in sound data acquired by the sound effect reproduction unit 16 Alternatively, an audio synthesizer 17 that synthesizes content audio data included in the data broadcast content, a video output unit 18 that outputs the superimposed video data, an audio output unit 19 that outputs the synthesized audio data, and the tuner 11. The CPU 20 is connected to each component of the audio output unit 19 via the bus 26 and controls these components.

  The CPU 20 further includes a program memory 21 for storing software for the CPU 20 to control each of the above components, program tuning history and personal information, setting information to be stored, built-in sound data, menu screen data, etc. , A work memory 23 used when the CPU 20 performs control processing, internal sound data acquired from the nonvolatile memory 22, audio data included in the received data broadcast content, and silence data Is connected to the remote control I / F 25 for acquiring commands by infrared rays transmitted from the remote controller.

<< Operation of the digital broadcast receiver 10 when receiving broadcast waves >>
An operation when a broadcast radio wave is received by the digital broadcast receiver 10 in the present embodiment will be described with reference to FIG.

  First, broadcast data is acquired from radio waves received from the antenna 30 in the tuner 11.

  The acquired broadcast data is separated into broadcast video data and broadcast audio data by the demultiplexing unit 12.

  The separated broadcast video data is sent to the video data decoding unit 13, and the broadcast audio data is sent to the audio data decoding unit 14.

  In the video data decoding unit 13, the compressed broadcast video data is decoded, and the graphics data included in the menu screen data acquired from the non-volatile memory 22 and the received data broadcast content is included in the broadcast video data. 15 and is output from the video output unit 18.

  The audio data decoding unit 14 decodes the compressed broadcast audio data, synthesizes the built-in sound data or content audio data on the nonvolatile memory 22 or the audio data memory 24 acquired by the sound effect reproduction unit 16, Output from the audio output unit 19.

<< Operation of Digital Broadcasting Receiver 10 During Sound Effect Playback >>
In the digital broadcast receiver 10 of the present embodiment described above, the processing when the user performs an operation on the screen and the built-in sound data as the first sound effect data is reproduced with reference to the flowchart of FIG. explain.

  The sound effect data is sound data of a predetermined length that is reproduced when an operation is performed on the receiver from the outside. In the present embodiment, a case where a menu screen is acquired and operated by the user will be described.

  First, when the digital broadcast receiver 10 is powered on, the CPU 20 initializes each processing unit as necessary, and waits for broadcast reception or a user operation (S1).

  With this initialization, all or a part of the built-in sound data stored in the nonvolatile memory 22 is stored in the sound data memory 24.

  When the user operates the remote control in the state of step S1, the remote control I / F 25 receives a command for instructing activation of the menu screen. When the command is received by the remote control I / F 25, the menu screen data is acquired from the nonvolatile memory 22 by the CPU 20. The acquired menu screen data is displayed on the screen by the video output unit 18 via the graphics video mix unit 15 (S2).

  When the user performs an operation such as selecting a menu or pressing the enter button on the displayed menu screen (S3), the CPU 20 incorporates the operation in advance to feed back to the user that the operation has been performed. A process of reproducing the built-in sound data as a sound effect is performed. Processing for reproducing the internal sound data will be described with reference to FIGS.

  As shown in FIG. 3, the area where the internal sound data is stored in the audio data memory 24 is defined as the internal sound data area 24a, and the area where the audio data of the data broadcast content is stored is the content audio data area 24b. An area in which silence data (data in which “0” continues as digital data) is stored is defined as a silence data area 24c.

  First, the CPU 20 acquires internal sound data corresponding to the operation on the menu screen from the internal sound data area 24a of the audio data memory 24 (S4).

  The configuration of the built-in sound data 100 is shown in FIG. The built-in sound data 100 is composed of header data 110 and sound data 120. The header data 110 includes information such as the type of the audio data 120, the sampling frequency, the data length of the audio data 120, and the number of frames of the audio data 120.

  Next, silence data 200 as shown in FIG. 5 is acquired from the silence data area 24c of the audio data memory 24 (S5).

  The silence data 200 includes header data 210 and ‘0’ data 220 in which ‘0’ is continuous as digital data. The header data 210 includes information such as data type, sampling frequency, data length of the “0” data 220, and the number of frames of the “0” data 220.

  The acquired built-in sound data 100 and silence data 200 are connected by the processing of the CPU 20, and reproduced sound data 300 as new sound effect data as shown in FIG. 6 is generated (S6).

  The reproduced sound data 300 includes header data 310, audio data 120, and “0” data 220. The header data 210 includes the type of the audio data 120 and the “0” data 220, the sampling frequency, the data length of the data length of the audio data 120 and the data length of the “0” data 220, and the number of frames of the audio data 120. And the number of frames including the number of frames of the “0” data 220 are included.

  The generated reproduction sound data 300 is sent to the sound effect reproduction unit 16 and reproduced from the audio output unit 19 via the audio synthesis unit 17 (S7).

  According to the first embodiment described above, the sound effect is reproduced in a state where silence data is connected to the built-in sound data. Therefore, the sound effect reproduction is terminated after the sound is silenced to some extent, and at the end of the reproduction. Generation of noise can be suppressed.

Second Embodiment
A digital broadcast receiver according to a second embodiment of the present invention will be described. Since the configuration of the digital broadcast receiver according to this embodiment and the operation when a broadcast radio wave is received are the same as those in the first embodiment, detailed description thereof is omitted.

<< Operation of Digital Broadcasting Receiver 10 During Sound Effect Playback >>
In the present embodiment, processing when content audio data, which is second sound effect data included in received data broadcast content, is reproduced in the digital broadcast receiver 10 will be described with reference to the flowchart of FIG. To do.

  First, when the digital broadcast receiver 10 is powered on, the CPU 20 initializes each processing unit as necessary, and waits for broadcast reception or a user operation (S11).

  With this initialization, all or a part of the built-in sound data stored in the nonvolatile memory 22 is stored in the sound data memory 24.

  When the data broadcast content is received from the antenna 30 in the state of step S11 (S12), the demultiplexing unit 12 obtains the content audio data, the graphics data from the data broadcast content, and the control method and related information regarding the data broadcast content. The described BML document data is acquired (S13).

  Here, after the content audio data is acquired, it is temporarily stored in the content audio data area 24b of the audio data memory 24 (S14).

  Next, the BML document acquired by the CPU 20 is analyzed (S15). In accordance with the description of the analyzed BML document, content reproduction screen data is formed from the acquired graphics data, and is displayed on the screen by the video output unit 18 via the graphics video mixing unit 15 (S16).

  When an operation is performed by the user on the displayed content reproduction screen (S17), a process of reproducing sound effects according to the description of the BML document is performed. This user operation includes, for example, an operation of pressing a button on the content reproduction screen by a remote controller.

  As the sound effect reproduced here, the built-in sound data may be reproduced or the content audio data extracted from the received data broadcast content may be reproduced. The processing when the built-in sound data is reproduced as a sound effect is the same as in the first embodiment.

  Processing when content audio data extracted from data broadcast content received as sound effects is reproduced will be described.

  First, the content audio data to be reproduced is acquired from the content audio data area 24b of the audio data memory 24 (S18).

  The content audio data is composed of header data 110 and audio data 120 in the same way as the built-in sound data in FIG.

  Next, silence data 200 as shown in FIG. 5 is acquired from the silence data area 24c of the audio data memory 24 (S19).

  The acquired content audio data and silence data 200 are connected by the processing of the CPU 20 to generate reproduced sound data 300 as shown in FIG. 6 (S20).

  The generated reproduction sound data 300 is sent to the sound effect reproduction unit 16 and reproduced from the audio output unit 19 via the voice synthesis unit 17 (S21).

  According to the second embodiment described above, since sound effects are reproduced in a state where silence data is connected to content audio data acquired from received data broadcast content, sound effects are reproduced after a certain amount of silence has been achieved. And the generation of noise at the end of playback can be suppressed.

  In the present embodiment, the content audio data is acquired from the data broadcast content and then temporarily stored in the content audio data area 24b of the audio data memory 24. However, the present invention is not limited to this. It may be obtained from data broadcasting content.

<Third Embodiment>
A digital broadcast receiver according to a third embodiment of the present invention will be described. Since the configuration of the digital broadcast receiver according to the present embodiment and the operation when a broadcast radio wave is received are the same as those in the first embodiment, detailed description thereof will be omitted.

<< Operation of Digital Broadcasting Receiver 10 During Sound Effect Playback >>
In the present embodiment, in the digital broadcast receiver 10, when the silence data is added to the sound data of the sound effect and reproduced as in the first embodiment and the second embodiment, the CPU 20 plays the sound data of the sound effect and the sound silence. Processing for acquiring and reproducing data separately will be described.

  In the present embodiment, the operations (steps S1 to S4 in FIG. 2 or steps S11 to S17 in FIG. 7) until the internal sound data or content sound data is acquired by the CPU 20 are the same as those in the first embodiment or the first embodiment. Since it is the same as that of 2nd Embodiment, detailed description is abbreviate | omitted.

  Next, the operation when sound effects are reproduced in the digital broadcast receiver 10 of the present embodiment will be described with reference to the flowchart of FIG.

  When the built-in sound data or content sound data is acquired as a sound effect in the CPU 20 of the digital broadcast receiver 10 of the present embodiment (S31), the sound is output to the sound effect reproducing unit 16 and output via the sound synthesizing unit 17. It is reproduced from the part 19 (S32).

  When the output of the built-in sound data or content sound data reaches the end, an interrupt is generated and notified to the CPU 20 from the sound effect reproducing unit 16 before the reproduction end processing is started (S33).

  When this notification is received, the CPU 20 continuously obtains the silence data 200 from the silence data area 24c of the voice data memory 24 (S34), is sent to the sound effect reproduction unit 16, and is sent via the voice synthesis unit 17 to the voice. It is reproduced from the output unit 19 (S35).

  According to the third embodiment described above, since the silence data is reproduced continuously after the built-in sound data as the sound effect or the content audio data acquired from the received data broadcast content is reproduced, the sound becomes somewhat silent. After the sound effect is reproduced, the generation of noise at the end of the reproduction can be suppressed.

It is a block diagram which shows the digital broadcast receiver in 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the digital broadcast receiver in 1st Embodiment of this invention. It is a table | surface which shows an example of the result of the channel scan performed with the digital broadcast receiver in 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the audio | voice data built in the digital broadcast receiver in 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the silence data incorporated in the digital broadcast receiver in 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the reproduction sound data produced | generated by the digital broadcast receiver in 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the digital broadcast receiver in 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the digital broadcast receiver in 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Digital broadcast receiver 11 ... Tuner 12 ... Demultiplexing unit 13 ... Video data decoding unit 14 ... Audio data decoding unit 15 ... Graphics video mixing unit 16 ... Sound effect reproduction unit 17 ... Audio synthesis unit 18 ... Video output unit 19 ... Sound output unit 20 ... CPU
21 ... Program memory 22 ... Non-volatile memory 23 ... Work memory 24 ... Audio data memory 24a ... Built-in sound data area 24b ... Data broadcast content audio data area 24c ... Sound data area 25 ... Remote control I / F
26 ... Bus 30 ... Antenna 100 ... Built-in sound data 110 ... Header data 120 ... Audio data 200 ... Sound data 210 ... Header data 220 ... '0' data 300 ... Reproduced sound data 310 ... Header data

Claims (1)

In a digital broadcast receiver that receives a digital broadcast wave by a receiving means and reproduces a broadcast program,
Storage means for storing first sound effect data which is sound effect data unique to the receiver;
Extracting means for extracting second sound effect data that is sound effect data included in the digital broadcast wave received by the receiving means;
At least one of the first sound effect data and the second sound effect data is acquired, and new sound effect data is obtained by connecting silence data whose data content is silence to the end of the acquired sound effect data. Generating means for generating;
Reproducing means for reproducing the generated new sound effect data;
A digital broadcast receiver characterized by comprising:
The sound effect data is a digital broadcast receiver that is audio data of a predetermined length that is reproduced when an operation is performed on the receiver from the outside.

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