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VCD影碟机的声音图像质量和纠错能力取决于其解码芯片的性能。解码芯片就是VCD机中完成音频和视频解压缩处理的大规模集成电路。如前几讲所述,VCD机是在CD机心的基础上增加一套VCD信号的处理电路而成的,而VCD信号处理电路是以解压芯片为核心的一组集成电路,其典型结构如图1所示。 市场上流行的VCD机所用的解码芯片,虽然品种型号很多,但基本功能是相同的,只是外围电路、IC引脚定义和相关集成电路不同而已。国产VCD机所采用的解码芯片大都是以美国C-Cube公司开发的CL480、CL484、CL482和CL680为基础的集成电路。另外,夏普、高士达、三星等公司的VCD机也采用这种集成电路。索尼、松下公司则采用各自开发的集成电路。近来ESS公司开发的解码芯片引起了VCD生产厂的极大兴趣,并开始广泛地应用在VCD机中。其型号是ES3204、ES3208和ES3210。
VCD player sound image quality and error correction capability depends on the performance of its decoder chip. Decoder chip is VCD machine to complete audio and video decompression of large-scale integrated circuits. As mentioned earlier, VCD machine is based on the CD movement to add a set of VCD signal processing circuit is made, and VCD signal processing circuit is to decompress the chip as the core of a group of integrated circuits, the typical structure such as Figure 1 shows. The popular VCD decoder on the market, although the variety of models, but the basic functions are the same, but the peripheral circuits, IC pin definitions and related integrated circuits are different. Most domestic VCD decoder chip used by the United States C-Cube developed CL480, CL484, CL482 and CL680-based integrated circuits. In addition, sharp, Gao Shida, Samsung and other companies VCD machines also use this integrated circuit. Sony, Panasonic companies use their own development of integrated circuits. Recently, the decoder chip developed by ESS company has aroused the great interest of VCD manufacturers and began to be widely used in VCD machines. The models are ES3204, ES3208 and ES3210.