摘要
文章介绍了VoIP(IP网络上传送语音)语音质量的测试方法,分析了影响VoIP语音质量的主要因素:延迟、抖动、丢包率和时延。利用E模型定量地分析了语音质量与端到端时延的关系,通过建立数学模型,指出了VoIP系统中主要的时延分量,并研究了这些时延分量产生的机理和影响它们的参数。在设计实际的VoIP系统时,可以通过优化影响时延分量的主要参数,改善VoIP系统的时延。
In this paper, the method for measuring the QoS for VoIP network is introduced and the main elements affecting VoIP QoS performance such as delay jitter, packet loss and IP network delay analyzed. The relationship between its end-to-end voice quality and delay is quantitatively analyzed by using the E-model, the main delay components in the VoIP system pointed out by setting up a mathematical model and the mechanism of their generation and parameters affecting them studied. In the design of a practical VoIP system, it is possible to improve its delay by optimizing these main parameters.
出处
《光通信研究》
北大核心
2007年第1期11-14,共4页
Study on Optical Communications
基金
国家"八六三计划"资助项目(2004AA122310)
