这是一个子带编码的程序，利用子带编码有很多优点，尤其是在语音通信的应用中，读者可以自定义信道模型，程序里选择的是老师给定的文件-This is a sub-band coding process, using sub-band coding has many advantages, especially in voice communication applications, the reader can customize the channel model, the program selected in a given document is the teacher