G723 标准执行，C语言，有VAD代码。-G723 standards, C language, and VAD code.

ITU-T G.729语音压缩算法。 descr iption: Fixed-point descr iption of commendation G.729 with ANNEX B Coding of Speech at 8 kbit/s using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) with Voice Activity Decision(VAD), Discontinuo

3GPP Adaptive Multi- Rate (AMR) 标准实现，针对8KHz采样音频文件按20ms一帧实现两者VAD模式的编码 -3GPP Adaptive Multi-Rate (AMR) standard of achievement for 8KHz sample audio files, according to 20ms between the VAD model to achieve a coding