采用PCM方式对语音信号进行编码和解码，文件包含编码解码函数和量化误差计算函数-PCM voice signal by means of encoding and decoding, encoding and decoding functions and the file contains quantization error calculation functions

this code conveys the pcm encoding and decoding

在MATLAB环境下设计PCM码的编译码，并对比不同情况下的的编码进行对比。-In MATLAB environment design PCM code encoding and decoding, compare and contrast the different circumstances of the coding