摘要
随着 IP电话的广泛应用 ,IP电话的语音质量越来越受到人们的关注 ,成为制约其广泛应用的一个瓶颈 ,尤其是语音抖动现象的存在 ,更是制约了 IP电话在人们生活、工作中的应用。影响 IP电话质量主要有 3个因素 :抖动、分组延时、分组丢失。本文对 IP电话中的语音抖动成因进行了详细的分析 ,并提出了应用语音分组延时智能缓冲平滑的方法消除语音抖动 ,给出了自己特有的缓冲设计方案、设计原则 ,并进行了简单的仿真实验分析以及结果验证 ,提高了 IP电话话音质量。
With the extensive application of IP telephone, the pronunciation quality of IP telephone is paid close attention to more and more by people, become and restrict a bottleneck used extensively of it, especially the existence of the phenomenon that the pronunciation shakes, have restricted application in people′s life, work of IP telephone especially Influence IP telephone quality to have three factors mainly: Shake, divide into groups and delay time, divide into groups and lose This paper analyses reason of IP telephone pronunciation in detail, delay time intelligence buffer level and smooth method dispel pronunciation shake to divide into groups to put forward, provide one′s own peculiar plan of design of buffer, design principle, and has carried on simple emulation experimental analysis and result to verify, improve IP telephone speech quality with this
出处
《现代电子技术》
2005年第5期72-74,77,共4页
Modern Electronics Technique
关键词
IP电话
分组延时
语音抖动
缓冲区
IP telephone
divide into groups and delay time
pronunciation shakes
buffering area
