Audio and video multiplexed transmission system

An audio and video multiplexed receiver for receiving coded audio and video information for demultiplexing and decoding, comprising:

• a demultiplexer for demultiplexing a received data stream to separate digital audio and video signals;
• an audio decoder for decoding the digital audio signal;
• a video decoder for decoding the digital video signal;
• an audio digital-to-analog converter for converting the decoded digital audio signal into an analog audio signal periodically according to a predetermined clock frequency;
• a video digital-to-analog converter for converting the decoded digital video signal into an analog video signal periodically according to said predetermined clock frequency;
• a decoding controller for providing control data, corresponding to said predetermined clock frequency, to the audio decoder and the video decoder;
• and
• a timer for outputting time data representing said predetermined clock frequency to the audio digital-to-analog converter, the video digital-to-analog converter and the decoding controller.

An audio and video multiplexed transmission system for coding then transmitting audio and video information through a coding, and for receiving the coded audio and video information for decoding, comprising:

• a transmitter;
• and
• a receiver,
• wherein the transmitter comprises:
• an audio analog-to-digital converter for converting an audio signal into a digital audio signal periodically according to a predetermined clock frequency;
• an audio encoder for coding the digital audio signal;
• a video analog-to-digital converter for converting a video signal into a digital video signal periodically according to said predetermined clock frequency;
• a video encoder for coding the digital video signal;
• a coding controller for providing control data corresponding to said predetermined clock frequency to the audio encoder and the video encoder;
• a first timer for providing first time data representing said predetermined clock frequency to the audio analog-to-digital converter, the video analog-to-digital converter and the coding controller;
• and
• a multiplexer for multiplexing the coded audio and video signals according to the control data from the coding controller to output a data stream;
• and
• the receiver comprises:
• a demultiplexer for demultiplexing the input data stream to separate digital audio and video signals;
• an audio decoder for decoding the digital audio signal;
• an audio digital-to-analog converter for converting the decoded audio signal into an analog audio signal periodically according to said predetermined clock frequency;
• a video decoder for decoding the digital video signal;
• a video digital-to-analog converter for converting the decoded video signal into an analog video signal periodically according to said predetermined clock frequency;
• a decoding controller for providing control data corresponding to said predetermined clock frequency to the audio decoder and the video decoder;
• and
• a second timer for outputting second time data representing said predetermined clock frequency to the audio digital-to-analog converter, the video digital-to-analog converter and the decoding controller.