我们过去接触到的电视机、收录机、录像机等音频、视频设备都是处理模拟信号的设备。自CD、VCD机普及以来,数字技术开始迅速地普及。CD光盘是记录数字音频信号的光盘,而VCD盘则是记录经数据压缩处理的音频、视频信号的光盘。VCD影碟机中的主要电路是处理数字信号的大规模集成电路。在详述VCD影碟机的电路之前,先介绍一下有关音频和视频信号的数字处理方法和原理。 We used to touch the TV, tape recorders, video recorders and other audio and video equipment are analog signal processing equipment. Since the introduction of CDs and VCDs, digital technology has rapidly become popular. CDs are discs that record digital audio signals, while VCDs are discs that record audio and video signals compressed by data. The main circuit in a VCD player is a large scale integrated circuit that processes digital signals. In the VCD VCD player circuit described in detail, first introduce the audio and video signals on the digital processing methods and principles.