基于静音检测的ITU-TG.729算法  

Improvement of G.729 Algorithm Based on Voice Active Detection

作　　者：郑洪英[1,2,3] 郭东辉[1] 黄国和[3] 陈彩生[2] 

机构地区：[1]厦门大学技术物理研究所,福建厦门361005 [2]厦门大学电子工程系 [3]香港城市大学电子工程系,中国香港

出　　处：《厦门大学学报（自然科学版）》2002年第4期431-434,共4页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金 (6 0 0 76 0 15 );"86 3"预研基金 (6 9886 0 0 2 );福建省科委科技基金资助项目

摘　　要：提出了一种能够提高ITU TG .72 9算法性能的静音检测技术 .该技术的引入不仅可以降低G .72 9的语音通讯平均传输比特率 ,而且可以大量节省G .72 9压缩和解压过程的实际运算量 .通过在不同噪声背景下的性能分析 ,该静音检测技术的引入不会对G .72ITU T G.729 is a useful full rate recommendation for 8 kb/s digital speech communication. However it seems rather complex when applied to personal communication systems. Noticing that active speech is only account about 40% of real two way conversation, a simplified version of G.729 based on voice active detection (VAD) is presented in this paper. After applying voice active detection, G.729 will enable not only bit rate saving but also computation improving. The average bit rate of G.729 will be down to lower than 4 kb/s and computation time will be saved up to 54% in this improved G.729. Performance of the algorithm under different noise is also presented. Tests show good result under different noisy environments.

关 键 词：静音检测 ITU-TG.729算法 语音压缩 语音编码 语音合成 语音通讯 传输比特率 

分 类 号：TN912.3[电子电信—通信与信息系统]