一、概述 数字化的音响唱片(DAD)的基本录音和放音过程,如图1所示。它是将数码印制在唱片上,唱片的信号是一连串脉冲编码(PCM)信号,亦即将普通的模拟音频信号进行编码。在重放时,例如CD唱机则用激光照射唱片上的编码信号,经反射至拾音器(换能器)将编码信号解码还原成模拟信号, First, an overview of the digital audio recording (DAD) basic recording and playback process, as shown in Figure 1. It is digital printed on the record, the record signal is a series of pulse code (PCM) signal, that is, the ordinary analog audio signal encoding. During playback, for example, a CD player irradiates a coded signal on a disc with a laser and reflects it to a pickup (transducer) to decode and decode the encoded signal into an analog signal,