標題: Real-Time VoIP Quality Measurement for Mobile Devices
作者: Chen, Whai-En
Lin, Pin-Jen
Lin, Yi-Bing
資訊工程學系
Department of Computer Science
關鍵字: All-IP;E-model;mean opinion score (MOS);perceptual evaluation of speech quality (PESQ);session initiation protocol (SIP);voice over Internet protocol (VoIP)
公開日期: 1-Dec-2011
摘要: The quality of voice over Internet protocol (VoIP) is typically measured by mean opinion score (MOS) that significantly varies in wireless environments. Several approaches have been proposed to evaluate the MOS values of voice paths. However, these solutions require extra servers/gateways to conduct heavy computation for MOS measurement of VoIP calls. We propose two MOS measurement procedures for mobile devices. In our approach, a simple program is installed in each of the mobile devices (through an app-store like mechanism). In the perceptual evaluation of speech quality (PESQ) MOS measurement procedure, a lightweight real-time table lookup solution significantly reduces the computation time of PESQ MOS measurement from 315.4 s to 3 s. In the E-model MOS measurement procedure, the E-model MOS value can be accurately computed in 5.35 s.
URI: http://dx.doi.org/10.1109/JSYST.2011.2165604
http://hdl.handle.net/11536/14917
ISSN: 1932-8184
DOI: 10.1109/JSYST.2011.2165604
期刊: IEEE SYSTEMS JOURNAL
Volume: 5
Issue: 4
起始頁: 538
結束頁: 544
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