利用Matlab软件的GUI界面编程，通过此界面调用相关的程序去实现由抽样判决后的AMI码型、CMI码型和HDB3码型数字序列恢复出原始的PCM脉冲编码信号。-GUI interface using Matlab software programming, make a simple interface, this interface by calling the relevant procedures to implement the decision by sampling pattern after AMI, CMI HDB3 code pattern and sequence of digital pulses to recover the original PCM encoded signal.