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首先回顾了目前用于测量GSM网络中语音质量的多种方法,并介绍了一种新方法。该方法根据ITU-TG.107中的建议,为实际提供的语音质量以及用户感受提供了解决方案。接着讨论了增强语音质量的传统方法,并描述了基于网络的VED的具体功能。最后介绍并讨论了最近进行的实验以及基于ITU-TG.107条款所做的客观语音质量测量结果。这些实验和测量的对象是在几个部署先进VED的无线网络中发生的大量实际通话,将客观测量结果与实验室收听测试得出的结果进行对比,从而估算出典型网络条件下采用VED对语音质量的改善效果。
First of all, the current review of the current method for measuring voice quality in GSM networks has been reviewed and a new method has been introduced. This method, based on the recommendations in ITU-T G.107, provides a solution to the actual voice quality and user experience provided. The discussion followed the traditional approach to enhancing voice quality and described the specific capabilities of web-based VEDs. Finally, the recent experiments and objective speech quality measurements based on ITU-TG.107 are introduced and discussed. These experiments and measurements were conducted on a large number of actual calls that took place in several wireless networks deploying advanced VEDs, comparing objective measurements to laboratory-based listening tests to estimate the effect of VED on voice over typical network conditions Quality improvement.