Abstract: To accurately calculate the Ie-eff coefficient when evaluating VoIP speech quality with the ITU-T G.107 E-model, a real-time evaluation algorithm based on Markov model was presented. Through the establishment of 3-state Markov model for Ppl and 2-state Markov model for BurstR, formulas were derived and corresponding statistics algorithm was given. Commercial test results indicate that this algorithm can accurately evaluate the VoIP speech quality in real-time environment.

Key words: VoIP, markov model, E-model, Ie-eff, speech quality

摘要： 针对运用国际电联G.107 E模型评估VoIP通话质量时如何准确计算有效设备损伤系数的问题，提出一种基于马尔可夫模型的实时评估算法，通过分别为随机信息包丢失概率和突发比建立三态和二态马尔可夫模型，推导出估算有效设备损伤系数的运算公式和相应统计算法。商用测试结果表明，该评估算法能够在实时环境中较准确地评估VoIP通话质量。

关键词: 网络电话, 马尔可夫模型, E模型, 有效设备损伤系数, 通话质量