GSM语音编码，这是一个标准C的编码，可以用于Softphone等应用，程序中有注释。-GSM voice coding, which is a standard C code that can be used in applications such as Softphone, a procedure Notes.

MPEG-7 标准中音频编码部分源代码，JAVA语言实现，欢迎下载-MPEG-7 standard audio coding part of the source code, Java language, welcome to download

MPEG-2的AAC编码参考代码，可以用于学习AAC编码标准。-MPEG-2 AAC coding reference code can be used to study AAC coding standard.

3GPP制定的用于第三代移动通信的变速率语音编码标准amr的源码，代码加入工程后需在typedefs.h定义所用平台才可编译成功。-3GPP developed for third generation mobile communications standard variable rate speech coding amr source code by adding works to be defined in the platform in typedefs.h be compiled s