The E-Model, a computational model for use in transmission planning
发布日期
2000-05-01
标准状态
被代替;
摘要
This ITU-T Recommendation gives the algorithm for the so-called E-model as the common ITU-T Transmission Rating Model. This computational model can be useful to transmission planners, to help ensure that users will be satisfied with end-to-end transmission performance. The primary output of the model is a scalar rating of transmission quality. A major feature of this model is the use of transmission impairment factors that reflect the effects of modern signal processing devices.This revision provides an enhanced version of the E-model to better take into account the effects of room noise at the send side, and quantizing distortion.
本ITU-T建议给出了所谓的E模型算法作为通用ITU-T传输评价模型。这个计算机模型可用于传输计划者， 确保使用者对端到端传输性能满意。这个模型的主要输出是传输质量的数量级别。 本模型的主要特征是反应现代信号处理装置效应传输损伤因数的使用。本修正提供了一个E模型的增强版， 为更好地考虑发射端房间噪声和量子化扭曲效应。
The E-Model, a computational model for use in transmission planning
发布日期
2002-07-01
标准状态
被代替;
摘要
This ITU-T Recommendation gives the algorithm for the so-called E-model as the common ITU-T Transmission Rating Model. This computational model can be useful to transmission planners, to help ensure that users will be satisfied with end-to-end transmission performance. The primary output of the model is a scalar rating of transmission quality. A major feature of this model is the use of transmission impairment factors that reflect the effects of modern signal processing devices.
In the year 2000 revision, an enhanced version of the E-model was provided, in order to better take into account the effects of room noise at the send side, and quantizing distortion. With the present revision, the impairment due to random packet-loss has been included in a parametric way for different codecs.
The E-Model, a computational model for use in transmission planning
发布日期
2003-03-01
标准状态
被代替;
摘要
This Recommendation gives the algorithm for the so-called E-model as the common ITU-T Transmission Rating Model. This computational model can be useful to transmission planners, to help ensure that users will be satisfied with end-to-end transmission performance. The primary output of the model is a scalar rating of transmission quality. A major feature of this model is the use of transmission impairment factors that reflect the effects of modern signal processing devices.
In the year 2000 revision, an enhanced version of the E-model was provided, in order to better take into account the effects of room noise at the send side, and quantizing distortion. With the year 2002 revision, the impairment due to random packet-loss has been included in a parametric way for different codecs. The current version (2003) provides an enhanced modelling of the quality in case of low talker sidetone levels.
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发表于 2008-10-17 10:59:10
