Assessment of Speech Quality for VoIP Applications using PESQ and E-Model |
The aim of the paper is to investigate and assess speech quality for VoIP applications using
Khan HA, Sun L
the latest ITU-T standards (i.e. ITU-T P.862 PESQ and G.107 E-Model) and to compare the
results with subjective tests results. . The speech quality metrics used in this experiment are
MOS-LQS, MOS-LQO and MOS-CQE. The impact of packet loss rate (including packet
burstness) on speech quality was investigated based on a VoIP testbed (including NistNET
network emulator and XLite/ Skype VoIP terminals). The preliminary results show that PESQ
achieves a higher correlation rate (81%) with subjective test results than that of E-model
(74%). Some issues related with how to test speech quality properly in the experimental
testbed are also discussed.