GB7611-1987脉冲编码调制通信系统网路数字接口参数
Parameters of digital interface for PCM systems over telecommunication network
GB/T4110-1983脉冲编码调制通信系统系列
Pulse code modulation communication system hierarchy
基于对数脉冲编码调制的语音压缩系统实现
Realization of a Speech Compression System Based on Logarithmic Pulse Code Modulation