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本文简要地分析了数字式彩色电视机的原理和特点、电视信号数字化方法,具体介绍了直接从PAL全电视信号中分离Y信号和U、V信号的数字梳状滤波器电路以及和NTSC共用的数字解码器电路,同时介绍了扫描信号的数字化处理和中央控制器的原理。最后介绍了数字式彩色电视机的发展情况和发展趋势。
This paper briefly analyzes the principle and characteristics of digital color television and the digitization method of television signal, and introduces the digital comb filter circuit which separates the Y signal and the U, V signal directly from the PAL television signal, Digital decoder circuit, at the same time introduced the scanning signal digital processing and the principle of the central controller. Finally introduced the development of digital color TV and the development trend.