Title :
Uncertainty Evaluation of Objective Speech Quality Measurement in VoIP Systems
Author :
Paglierani, Pietro ; Petri, Dario
Author_Institution :
Multimedia Products & Solutions, Italtel S.p.A., Milan
Abstract :
This paper deals with the measurement uncertainty of the speech quality (SQ) achievable by an actual voice-over-Internet-protocol (VoIP) telephony network. The accuracy of end-to-end speech data provided by the perceptual estimation of SQ (PESQ) algorithm suggested in the International Telecommunication Union (ITU) recommendation P.862 is discussed. Then, the uncertainty of the PESQ results under different measurement conditions and real-life VoIP equipment (media gateway) is analyzed. This problem, in fact, has received very little attention in the literature, although many results related to other kinds of PESQ applications are available. Meaningful experimental data are reported and discussed mainly by means of statistical tools.
Keywords :
Internet telephony; voice communication; International Telecommunication Union recommendation P.862; VoIP system; end-to-end speech data; media gateway; objective speech quality measurement; perceptual estimation algorithm; telephony network; uncertainty evaluation; voice-over-Internet-protocol; Communication system performance; Voice over Internet Protocol (VoIP); mean opinion score (MOS); network testing; speech codecs; speech quality (SQ);
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2008.2004984
