基于语音质量预测的VoIP自适应抖动缓冲算法

计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (10): 63-66.

基于语音质量预测的VoIP自适应抖动缓冲算法

蔡铁1，2，龙志军3，伍星2

1.深圳市可视媒体处理与传输重点实验室，广东深圳 518029
2.深圳信息职业技术学院，广东深圳 518029
3.中兴通讯股份有限公司，广东深圳 518057

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-04-01 发布日期:2011-04-01

Adaptive Jitter buffer algorithm of VoIP based on speech quality prediction

CAI Tie1，2，LONG Zhijun3，WU Xing2

1.Shenzhen Key Laboratory of Visual Media Processing and Transmission，Shenzhen，Guangdong 518029，China
2.Shenzhen Institute of Information Technology，Shenzhen，Guangdong 518029，China
3.ZTE Corporation，Shenzhen，Guangdong 518057，China

Received:1900-01-01 Revised:1900-01-01 Online:2011-04-01 Published:2011-04-01

摘要/Abstract

摘要： 抖动缓冲是解决VoIP系统延时抖动问题的有效方法。为实现抖动缓冲的动态调整，获得更好的VoIP通话质量，提出了一种基于语音质量预测的自适应抖动缓冲算法。算法采用Pareto分布为延时建模，通过E-Model方法预测突发丢包模式下的瞬时语音质量，以最大化语音质量为目标，自适应选择出最优的抖动缓冲区大小。实验仿真结果表明，所提算法明显优于已有算法，能够有效提高VoIP系统的语音质量。

关键词: IP语音, 抖动缓冲, 语音质量预测

Abstract: Jitter buffering is an effective method to combat the delay jitter problems in Voice over IP（VoIP） systems.To adjust the jitter buffer dynamically and achieve better quality of VoIP，an adaptive jitter buffer algorithm based on speech quality prediction is proposed.This algorithm uses a Pareto distribution to model the delay and predicts the instantaneous speech quality under burst packet loss condition based on E-Model method.Then it adaptively selects the optimal jitter buffer size to maximize the predicted value of speech quality.The simulation results demonstrate that the proposed algorithm outperforms existing algorithms and improves the speech quality of VoIP system effectively.

Key words: Voice over IP（VoIP）, jitter buffer, speech quality prediction

蔡铁1，2，龙志军3，伍星2. 基于语音质量预测的VoIP自适应抖动缓冲算法[J]. 计算机工程与应用, 2011, 47(10): 63-66.

CAI Tie1，2，LONG Zhijun3，WU Xing2. Adaptive Jitter buffer algorithm of VoIP based on speech quality prediction[J]. Computer Engineering and Applications, 2011, 47(10): 63-66.