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何为“单芯片”? DVD机的内部存在着解码和伺服两大系统。所谓伺服就是控制读取数据的激光头聚焦、主轴电机转动及跟踪系统运动的电机自控线路,它是以传统的模拟自动控制电路为主的集成电路。而解码系统则是将伺服系统获得的未经处理的信号解码输出为可被听到和看到的音、视频信号,并将下一步的处理结果反馈给伺服系统。这两者的设计要求有许多不同,传统DVD机往往将这两者和音视频编码三块芯片分开进行数据处理。
What is “single-chip”? DVD machine’s internal decoding and servo exist two systems. The so-called servo is to read the data control laser head focus, spindle motor rotation and tracking system motion motor control circuit, which is based on the traditional simulation of automatic control circuit-based integrated circuits. The decoding system is the unprocessed signal obtained by the servo system is decoded and output as audio and video signals that can be heard and seen, and the result of the next step is fed back to the servo system. There are many differences between the design requirements of the two, the traditional DVD machines are often two separate audio and video coding chip for data processing.