This solution use amr-nb voice codec to code and decode .wav files in order to sound quality on different bitrates. IDE: VS 2010 In solution four projects 1. ConvertWavToData - convert .wav file to PCM short file. 2. AMRNBCodec - amr-nb en

C代码实现的GSM全速率语音编解码，GSM系统是一种全数字系统，话音和其它信号都要进行数字化处理，因此移动台首先要将语音信号转换成模拟电信号，以及其反变换，移动台再把这模拟电信号转换成13Kbit/s的数字信号，用于无线传输-GSM full rate speech code-decode.GSM system is a full digital system, voice and other signals to digital processing, so the mobile statio

This Program using matlab to convert rain rate to rain attenuation. Rain attenuation results are used for calculated the link performance of communication systems.

用于音频信号处理中采样率的转换，matlab代码，可支持不同采样率转换-used as different sampling convert for audio