PCM mode audio synthesis system of television

Abstract

The invention discloses a PCM mode audio synthesis system of a television. The PCM mode audio synthesis system comprises a clock oscillator, a control device, a voice memory, an address counter, a decoding circuit, a digital-to-analog converter, a low-pass filter, an audio amplifier, and an audio output device. The control device, the voice memory, and the address counter are connected with the clock oscillator; the voice memory, the address counter, the decoding circuit, the digital-to-analog converter, the low-pass filter, the audio amplifier, and the audio output device are successively connected, and the clock oscillator is used for generating different clock signals required by the television. The clock signals are provided for the control device, the voice memory and the address counter at the same time through the same clock oscillator, the consistency of three devices of the control device, the voice memory and the address counter is guaranteed, and the real-time performance ofthe audio synthesis system is guaranteed, the decoding circuit is used for conducting data decompression under the condition that the distortion rate is reduced, and the high recognition rate is guaranteed.

Description

technical field [0001] The invention relates to a TV audio system, in particular to a PCM mode audio synthesis system of the TV. Background technique [0002] Television (Television, TV, Video) refers to the use of electronic technology and equipment to transmit moving images and audio signals, that is, television receivers, and is also an important tool for broadcasting and video communication. Televisions were first invented by British engineer John Logie Baird. Invented in 1925. Televisions use electrical methods to transmit live visual images in real time. Similar to movies, television uses the visual residual effect of the human eye to display frame-by-frame still images, forming visually moving images. The sending end of the TV system converts each tiny part of the scene into electrical signals according to brightness and chromaticity, and then transmits them sequentially. At the receiving end, the brightness and chromaticity of each tiny part are displayed accordin...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the audio synthesis system in the prior art cannot have both advantages of recognition rate and real-time. The advantages

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