G729 codec 简介(含g729a.rar (447 K) g729_lib.rar (841 K) )
G.729标准制定是通过的8kbps的语音编码协议，采用共轭结构的算术码本激励线性预测CS-ACELP算法。
G.729系列主要有以下几种：
G.729 --- 最基本的G.729 标准协议
G.729A --- 对G.729 codec 一些算法进行简单处理，相当于降低了算法的复杂度
G.729B --- 加入了语音端点检测模块，在编码前对语音进行语音和静默音进行检测，然后分别对不同情况进行编码
G.729AB --- 就是G.729A 中加入语音端点检测算法， 目前G.729AB 用得比较多，encoder 后，码流中有三种数据块： 语音(80bits), CNG (16bits), DTX(0 bit).
G.729 Codec ,从2006年开始， 所有的spec 和 source code 都是开源的，可以从ITU 主页上下的。
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