4.编码器是将采样幅值转换成一组脉冲的单元,它对 数字传输是非常重要的。 The coder, a unit that converts amplitude values to a set ofpulses, is very important to digital transmission 5.编码的问题是一个极为重要的问题。 The problem of coding is a very important one. 6.PCM这个术语是一个通信术语。 The term PCM is a communications one4. 编码器是将采样幅值转换成一组脉冲的单元，它对 数字传输是非常重要的。 The coder, a unit that converts amplitude values to a set of pulses, is very important to digital transmission. 5. 编码的问题是一个极为重要的问题。 The problem of coding is a very important one. 6. PCM这个术语是一个通信术语。 The term PCM is a communications one