VoIP中丢包对语音质量影响的评估

The 2nd IEEE Internatioal Workshop on Haptic, Audio and Visual Environments and Their Applications, 2003. HAVE 2003. Proceedings. Pub Date : 2003-11-10 DOI:10.1109/HAVE.2003.1244724

L. Ding, R. Goubran

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引用次数: 73

摘要

本文通过使用ITU-T G.107 (E-model)研究丢包对网络语音协议(VoIP)应用中语音质量的影响，该模型的参数目前仅涵盖有限的VoIP场景。研究了G.729编解码器的丢包率、包大小和错误隐藏技术。以平均意见分数(MOS)作为评价语音质量的指标，采用语音质量感知评价(PESQ)算法进行测量。这些对语音质量的影响在设备损伤因子域中进行评估，然后形成e模型。验证试验表明，所提公式具有较好的精度，大多数情况下的预测误差在/spl mnplus/0.10 MOS之间，绝对最大值为0.14 MOS。

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Assessment of effects of packet loss on speech quality in VoIP

This paper investigates the effects of packet loss on speech quality in Voice over Internet Protocol (VoIP) applications by using ITU-T G.107, the E-model, whose parameters currently only cover limited VoIP scenarios. Several packet loss rates, packet sizes and error concealment techniques for codec G.729 are examined. Mean Opinion Score (MOS) is used as an index for speech quality and is measured by Perceptual Evaluation of Speech Quality (PESQ) algorithm. These effects on speech quality are assessed in the equipment impairment factor domain and then formulated into the E-model. The validation test shows good accuracy of the proposed formula, the prediction errors range between /spl mnplus/0.10 MOS for most cases with an absolute maximum of 0.14 MOS.

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来源期刊

The 2nd IEEE Internatioal Workshop on Haptic, Audio and Visual Environments and Their Applications, 2003. HAVE 2003. Proceedings.

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