JPH05328323A - Television broadcasting system based upon wide band isdn - Google Patents

Abstract

PURPOSE:To select and receive an optional sound out of plural sounds corresponding to an image by selecting an optional cell from plural cells included in a sound signal by a sound cell selecting part and converting the output cell into a sound input signal to be inputted to a TV image receiver. CONSTITUTION:When an image signal 4 is inputted to the input of a video cell assembling part l, an image cell 6 is outputted. When individual monophonic sound signals 5-1 to 5-3 are respectively inputted to the inputs of sound cell assembling parts 2-1 to 2-3, sound cells 7-1 to 7-3 are outputted. A cell multiplexing part 3 multiplexes these cells and outputs an output 8 to a wide band ISDN. On the other hand, a signal inputted from a TV broadcasting receiving part 12 is distributed into an image cell decomposing part 9 and a sound cell selecting part 10. The decomposing part 9 selects only the image cell, converts the selected cell into a video signal 13 and inputs the signal 13 to the video input part of a TV image receiver to reproduce an image. The selecting part 10 selects one cell out of three cells and a sound cell decomposing part 11 converts an output cell 14 from the selecting part 10 into a sound signal 15 and inputs the signal 15 to a sound input part to reproduce the sound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadband ISDN television broadcasting system, and more particularly to a broadband ISDN television broadcasting system using an asynchronous transfer system of a broadband ISDN (Integrated Services Digital Network).

[0002]

2. Description of the Related Art In a conventional television broadcasting system, either one channel stereo audio or two channel monaural audio can be selected and transmitted for one television broadcasting channel.

[0003]

In this conventional television broadcasting system, when it is attempted to increase the number of audio channels for one television broadcasting channel to two or more in the case of stereo audio or to the number of channels in the case of monaural audio. It is difficult to increase the number of audio channels because the frequency band width per television broadcasting channel is determined in the above, and in order to increase the number of audio channels, the frequency band per channel of television broadcasting is increased. When changing the width, there is a drawback that the frequency allocation of the channels of the television broadcasting must be changed.

[0004]

Broadband ISDN of the present invention.
The television broadcasting system according to is an asynchronous transfer system of a broadband ISDN (Integrated Services Digital Network), and in the television broadcasting transmitting unit, one type of video signal is converted into a cell which is a fixed length packet for one channel, and is converted into a video. A plurality of related monaural audio signals are converted into cells, the cells are multiplexed and transmitted, and the television broadcast receiver includes a video signal from the multiplexed cells transmitted from the television broadcast transmitter. It is characterized in that a cell is selected and converted into a video input signal of the television receiver, and the multiplexed cell transmitted from the television broadcast transmitting section is converted into a stereo or monaural audio input signal.

[0005]

The present invention will be described below with reference to the drawings. 1A and 1B show an embodiment of the present invention. FIG. 1A is a block diagram of a television broadcast transmitter, and FIG. 1B is a block diagram of a television broadcast receiver.

This embodiment is based on the asynchronous transfer system of the broadband ISDN (Integrated Services Digital Network) and is shown in FIG.
In the television broadcasting transmitting unit, a video cell assembling unit 1 for converting one type of video signal into a cell which is a fixed length packet for one channel, and a plurality of stereo-related or a plurality of monaural audio signals related to the video are provided. It has a plurality of voice cell assembling sections 2-1 to 2-3 for converting into cells and a cell multiplexing section 3 for multiplexing cells. In the television broadcast receiving unit of FIG. 1B, a cell containing a video signal is selected from the cells transmitted from the television broadcast transmitting unit to generate a video signal which is a video input signal of the television receiver. A video cell decomposition unit 9 for conversion and an audio cell selection unit 10 for selecting any one type of cell from a plurality of cells containing a stereo or monaural audio signal from the cells transmitted from the television broadcasting transmission unit. And a voice cell disassembling unit 11 for converting a cell containing one type of voice signal output from the voice cell selecting unit 10 into a stereo or monaural voice input signal of the television receiver.

As described above, in this embodiment, three audio cell assembling units for converting a stereo or monaural audio signal of the television broadcasting transmitting unit into cells are provided, and the input of the video cell assembling unit 1 is a television camera or a VTR. By inputting the video signal 4 such as (video tape recorder),
A video cell 6, which is a cell containing a video signal, is output. To the inputs of the voice cell assembling sections 2-1, 2-2 and 2-3, individual stereo or monaural voice signals 5-1, 5-2 and 5-3 are inputted from a microphone or a VTR voice signal. As a result, the voice cells 7-1, 7-2 and 7-3, which are the cells including the voice signal, are output. The cell multiplexer 3 multiplexes the video cell 6 and the audio cells 7-1, 7-2 and 7-3, and sends the output 8 to the wide band ISDN as the output of the television broadcast transmitter.

The signals input from the television broadcast receiving unit input 12 are distributed to the video cell disassembling unit 9 and the audio cell selecting unit 10, respectively.

The video cell disassembling unit 9 can reproduce the video by selecting only the video cell, converting it into the video signal 13, and inputting it to the video signal input unit of the television receiver. In the voice cell selection unit, only one arbitrary type cell is selected from the three types of cells containing voice information, and the output cell 14 is converted into a stereo or monaural voice signal 15 by the voice cell decomposition unit 11, By inputting into the audio signal input section of the television receiver, an arbitrary sound can be reproduced from the three kinds of sounds.

[0010]

As described above, the broadband I of the present invention is used.
In the broadcasting system by SDN, the television broadcasting transmitting section sends out one kind of video signal for one channel,
Sends multiple stereo or monaural audio signals related to video, multiplexes these sent signals and sends them, and the television broadcast receiver receives the video signal from the signal sent from the television broadcast transmitter. By receiving an arbitrary audio signal related to the video, the user of the television receiver can select any one kind of sound from a plurality of sounds for one kind of video, and By adding a voice cell assembling unit to the television broadcast transmitting unit, it is possible to easily increase the types of voices that can be transmitted per channel.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

[Explanation of symbols]

 1 Video Cell Assembly Section 2-1 to 2-3 Audio Cell Assembly Section 3 Cell Multiplexing Section 4 Video Signal Input 5-1 to 5-3 Audio Signal Input 6 Video Cell Output 7-1 to 7-3 Audio Cell Output 8 Television John broadcast transmission unit output 9 Video cell decomposition unit 10 Audio cell selection unit 11 Audio cell decomposition unit 12 Television broadcast reception unit input 13 Video signal output 14 Audio cell selection unit output 15 Audio signal output

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Claims (1)

[Claims] 1. In an asynchronous transfer system of a broadband ISDN (Integrated Services Digital Network), a television broadcast transmission unit converts one type of video signal for one channel into a cell which is a fixed length packet, and relates to video. A plurality of monaural audio signals are converted into cells, the cells are multiplexed and transmitted, and the television broadcast receiving unit selects a cell containing a video signal from the multiplexed cells transmitted from the television broadcast transmitting unit. A wideband ISDN, which is selected and converted into a video input signal of a television receiver, and converted from a multiplexed cell of transmission from the television broadcast transmission section into a stereo or monaural audio input signal.
Television broadcasting system by.