JPH10164461A - Multiplexed audio signal processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify structure when only an audio signal in a digital input video/audio signal multiplexed by an AES/EBU format is processed and to obtain the audio signal to which high-definition processing is performed. SOLUTION: Only the audio signal in the digital input video/audio signal Si is processed by a processing audio processing circuit 20. A synchronization signal of the audio signal is separated in the processing audio processing circuit 20 by a synchronization separation circuit 21 and the synchronization signal delayed to correspond to the start and end positions on a time axis of the audio signal is outputted from delay circuits 23, 24 to the audio processing circuit 20. A clock signal is generated from a video signal and inputted to the audio processing circuit 20 by a clock signal generating circuit 22, only the audio signal is processed by the clock signal by the audio processing circuit 20 and the digital output video/audio signal So is transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a television (T)
V) A multiplexed audio signal processing device that is used for a sub-adjustment system of a broadcasting station and performs processing only on an audio signal in a digital input video / audio signal multiplexed in an AES / EBU format which is a standard of digital television broadcasting. About.

[0002]

2. Description of the Related Art Conventionally, in a sub-adjustment system of a TV broadcasting station, processing is performed only on an audio signal in a digital input video / audio signal obtained by multiplexing a video signal and an audio signal in an AES / EBU format, for example, a fade process. Sometimes.

FIG. 3 is a block diagram showing a configuration of a conventional multiplexed audio signal processing device. In FIG. 3, AES / E
A digital input video / audio signal Si in which a video signal and an audio signal are multiplexed in the BU format is input to the demultiplexer 11, where it is separated into a video signal and an audio signal. The separated video signal and audio signal are input to the video synchronizer 12 and the audio processing circuit 13, respectively.

[0004] The audio processing circuit 13 performs processing on the audio signal, for example, fade processing, and the audio signal is input to the audio synchronizer 14. The audio signal and the video signal that have been synchronized through the audio synchronizer 14 and the video synchronizer 12 are input to the multiplexing unit 15. The multiplexing unit 15 multiplexes the video signal and the audio signal separated by the separation unit 11 again, and outputs the multiplexed digital output video / audio signal So.

As a conventional example of such a device, Japanese Patent Laid-Open Publication No. Hei 6-205316, entitled "Multi-Channel Broadcast Receiver",
JP-A-6-205317, "Multi-channel broadcast receiver" can be mentioned. In this conventional example, in a multi-channel broadcast receiver, at least one type of program is selected at the same time, and a video signal and an audio signal can be freely combined and selected. Therefore, for example, when a two-screen television or the like is used, both video signals and audio signals of two types of programs can be displayed simultaneously.

[0006]

However, in the above-mentioned conventional example, when processing on an audio signal in the AES / EBU format, for example, when the audio processing circuit 13 performs fade processing, the separating section 11 for separating the video signal and the audio signal.
Also, a video synchronizer 12, an audio synchronizer 14, and a multiplexing unit 15 for establishing synchronization and performing multiplexing processing again are required. In other words, there are disadvantages in that the number of processing circuits is large, the configuration thereof is complicated, the phase matching processing at the time of remultiplexing is difficult, and a high-quality processed audio signal cannot be obtained.

SUMMARY OF THE INVENTION The present invention solves such problems in the prior art, and performs processing when only processing an audio signal in a digital input video / audio signal multiplexed in the AES / EBU format. The number of circuits is reduced, the configuration is simplified, and furthermore, processing such as phase matching at the time of remultiplexing becomes unnecessary, and a multiplexed audio signal processing apparatus capable of obtaining a high-quality processed audio signal is provided. For the purpose of providing.

[0008]

In order to achieve the above object, the present invention is directed to a multiplexing apparatus for processing only an audio signal in a digital input video / audio signal multiplexed in AES / EBU format. In the audio signal processing device, an audio processing means for transmitting a digital output video / audio signal obtained by processing only an audio signal in a digital input video / audio signal;
Synchronization separation means for separating a synchronization signal used for processing only an audio signal in an audio signal from a digital input video / audio signal and outputting the same, and audio processing means for generating a clock signal from the digital input video / audio signal Clock signal generating means for outputting the synchronization signal from the synchronization separation means so as to correspond to the start position and the end position on the time axis of the audio signal in the digital input video / audio signal, and output to the audio processing means. And a delay unit.

A multiplexed audio signal processing apparatus according to a second aspect of the present invention is configured to include a processing setting unit for selectively performing a plurality of types of processing on only the audio signal in the digital input video / audio signal.

According to a third aspect of the present invention, there is provided the multiplexed audio signal processing device, wherein the processing setting unit includes a control unit for performing control for selectively performing a plurality of types of processing on the audio signal to the audio processing unit; On the other hand, an operation unit for performing an input operation for setting a plurality of types of processing for an audio signal is provided.

According to a fourth aspect of the present invention, in the multiplexed audio signal processing apparatus, the processing setting section includes any one of a synchronization separating section, a clock signal generating section, and a delay section for selectively performing a plurality of types of processing on the audio signal. Alternatively, the control unit includes a control unit that controls the combination and an operation unit that performs an input operation for setting a plurality of types of processing on the audio signal with respect to the control unit.

This multiplexed audio signal processing apparatus is preferably applied to a sub-adjustment system of a television broadcasting station.

In the multiplexed audio signal processing device according to the first aspect of the present invention, a digital output video / audio signal obtained by processing only the audio signal in the input digital input video / audio signal is transmitted. You. On this occasion,
The processing for only the audio signal is performed using the synchronization signal separated from the digital input video / audio signal and the clock signal generated from the digital input video / audio signal. Further, only the audio signal is processed by the synchronization signal delayed so as to correspond to the start position and the end position on the time axis of the audio signal in the digital input video / audio signal.

As a result, when performing processing on an audio signal, as described in the conventional example, a circuit for performing separation processing of a video signal and an audio signal, establishment of synchronization of multiplexing processing, remultiplexing processing, and the like, is provided. Since it becomes unnecessary, the configuration is simplified. In addition, since the phase matching processing at the time of remultiplexing is not required, an audio signal that has been subjected to high-quality processing can be obtained.

The multiplexed audio signal processing device according to the second, third, and fourth aspects selectively performs a plurality of types of processing on only the audio signal in the digital input video / audio signal. As a result, various processes can be performed on only the audio signal.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a multiplexed audio signal processing apparatus according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a multiplexed audio signal processing device according to a first embodiment of the present invention. The first shown in FIG.
The multiplexed audio signal processing device according to the embodiment has an AES / EBU
A digital input video / audio signal Si in which a video signal and an audio signal are multiplexed in a format is input, and here, processing for only the audio signal, for example, audio processing for transmitting a digital output video / audio signal So subjected to a fade process The circuit 20 is provided.

In the multiplexed audio signal processing apparatus, the synchronization signal used when the audio processing circuit 20 processes only the audio signal in the digital input video / audio signal Si is separated from the digital input video / audio signal Si. And a sync separation circuit 21 for outputting the same. A clock signal generation circuit 22 for generating a clock signal from the digital input video / audio signal Si and outputting the clock signal to the audio processing circuit 20; a start position and an end on the time axis of the audio signal in the digital input video / audio signal Si Delay circuits 23 and 24 for outputting two delay synchronization signals corresponding to positions to the audio processing circuit 20
Are provided.

Next, the operation of the first embodiment will be described. In FIG. 1, the audio processing circuit 20 performs processing on only the audio signal in the digital input video / audio signal Si, for example, fade processing. A synchronization separation circuit 21 separates a synchronization signal used for processing only an audio signal in the digital input video / audio signal Si by the audio processing circuit 20 from the digital input video / audio signal Si, and outputs the synchronization signal to the delay circuits 23 and 24. Output. This delay circuit 2
3 and 24 output to the audio processing circuit 20 synchronization signals delayed so as to correspond to the start position and the end position on the time axis of the audio signal in the digital input video / audio signal Si.

Further, the digital input video / audio signal Si
In order to establish synchronization between the audio signal and the video signal in
The clock signal generation circuit 22 generates a clock signal from the digital input video / audio signal Si,
Output to The clock processing circuit 2
0 transmits a digital output video / audio signal So which has been subjected to processing for only the audio signal in the digital input video / audio signal Si, for example, fade processing.

As described above, in the first embodiment, the AES
When processing is performed only on the audio signal in the digital input video / audio signal Si multiplexed in the / EBU format, the processing circuit is simplified. That is, as described in the conventional example, the separation processing of the video signal and the audio signal,
A circuit for establishing the synchronization of the multiplexing process and performing the re-multiplexing process becomes unnecessary. In addition, since the phase matching processing at the time of remultiplexing is not required, an audio signal that has been subjected to high-quality processing can be obtained.

FIG. 2 is a block diagram showing a configuration in the second embodiment. The second embodiment shown in FIG. 2 selectively performs a plurality of types of processing on only the audio signal in the digital input video / audio signal Si. In the second embodiment, the audio processing circuit 20 and the synchronization separation circuit 2 shown in FIG.
1. Clock signal generation circuit 22 and delay circuits 23 and 24
have.

Further, a processing setting section 30 for selectively performing a plurality of types of processing in the audio processing circuit 20 is provided. The processing setting unit 30 includes an audio processing circuit 20, a synchronization separation circuit 21, a clock signal generation circuit 22, and a delay circuit 2.
The control unit 31 includes a control unit 31 connected to the control units 3 and 24, and an operation unit 32 for performing an input operation for setting a plurality of types of processing on the audio signal to the control unit 31.

Next, the operation of the second embodiment will be described. In FIG. 2, an audio processing circuit 20, a synchronization separation circuit 21, a clock signal generation circuit 22, a delay circuit 23,
Operation 24 is basically the same as that of the first embodiment. In this operation, a plurality of types of processing for the audio signal are selectively set from the operation unit 32 to the control unit 31. The control unit 31 controls the audio processing circuit 20, the synchronization separation circuit 21, the clock signal generation circuit 22, and the delay circuits 23 and 24 according to the content of each processing on the audio signal.

The control section 31 latches the audio signal in the audio processing circuit 20 in accordance with the processing content of the audio signal in the digital input video / audio signal Si. Further, the control unit 31 controls the delay circuits 23 and 24 to generate a synchronization signal delayed so as to correspond to the start position and the end position on the time axis of the audio signal. Further, the control unit 31 controls the clock signal generation circuit 22 to adjust the output timing of the clock signal, and controls to output the frequency-converted clock signal to the audio processing circuit 20.

As described above, in the second embodiment,
A plurality of types of processing for only the audio signal in the digital input video / audio signal Si are selectively performed.

[0026]

As is apparent from the above description, according to the multiplexed audio signal processing apparatus of the first aspect of the present invention, the synchronization signal separated from the digital input video / audio signal and the digital input video / audio signal are used. The processing for only the audio signal is performed using the generated clock signal. Further, only the audio signal is processed by the synchronization signal delayed so as to correspond to the start position and the end position on the time axis of the audio signal in the digital input video / audio signal.

As a result, when performing processing on the audio signal, the circuit configuration is simplified. In addition, since the phase matching processing at the time of remultiplexing is not required, an audio signal that has been subjected to high-quality processing can be obtained.

According to the multiplexed audio signal processing device of the second to fourth aspects, since a plurality of types of processing are selectively performed on only the audio signal in the digital input video / audio signal, only various types of audio signals are processed. Can be processed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a multiplexed audio signal processing device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration according to a second embodiment.

FIG. 3 is a block diagram showing a configuration of a conventional multiplexed audio signal processing device.

[Explanation of symbols]

 Reference Signs List 20 audio processing circuit 21 synchronization separation circuit 22 clock signal generation circuit 22 23, 24 delay circuit 30 processing setting unit 31 control unit 32 operation unit Si digital input video / audio signal So digital output video / audio signal

Claims (4)

[Claims] 1. A multiplexed audio signal processing device for processing only an audio signal in a digital input video / audio signal multiplexed in AES / EBU format, wherein the processing is performed only on the audio signal in the digital input video / audio signal. Audio processing means for transmitting the applied digital output video / audio signal; and a synchronizing signal used by the audio processing means for processing only the audio signal in the digital input video / audio signal from the digital input video / audio signal. Synchronizing separation means for generating and outputting a clock signal from a digital input video / audio signal and outputting the clock signal to the audio processing means; The synchronization signal from the synchronization separation means is delayed so as to correspond to the start position and the end position, and Multiplexed audio signal processing apparatus characterized by comprising delay means for outputting to the processing means. 2. The multiplexed audio signal processing device according to claim 1, further comprising a processing setting unit for selectively performing a plurality of types of processing on only the audio signal in the digital input video / audio signal. Multiplexed audio signal processing device. 3. The multiplexed audio signal processing device according to claim 2, wherein the processing setting unit controls the audio processing unit to selectively perform a plurality of types of processing on the audio signal; A multiplexed audio signal processing device, comprising: an operation unit for performing an input operation for setting a plurality of types of processing on an audio signal to a control unit. 4. The multiplexed audio signal processing device according to claim 2, wherein the processing setting unit includes a synchronization separation unit, a clock signal generation unit, and a delay unit for selectively performing a plurality of types of processing on the audio signal. Multiplexed audio signal processing, comprising: a control unit that performs control on any or a combination; and an operation unit that performs an input operation for setting a plurality of types of processing on an audio signal with respect to the control unit. apparatus.