Issue No. 04 - July/August (2005 vol. 9)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/MIC.2005.72
Miroslaw Narbutt , Dublin Institute of Technology
Andrew Kelly , Dublin City University
Liam Murphy , University College Dublin
Philip Perry , University College Dublin
Delay and packet loss dramatically affect the quality of voice-over-IP (VoIP) calls and depend on the playout buffer scheme implemented at the receiver. The choice of playout algorithm can't be based on statistical metrics without considering the perceived end-to-end conversational speech quality. The authors present a method for evaluating various playout algorithms that extends the E-model concept by estimating user satisfaction from time-varying transmission impairments. This article evaluates several playout algorithms and shows a correspondence between the authors' results and those obtained via statistical loss and delay metrics.
VoIP, jitter compensation, adaptive playout algorithms, call quality assessment, user satisfaction
M. Narbutt, L. Murphy, A. Kelly and P. Perry, "Adaptive VoIP Playout Scheduling: Assessing User Satisfaction," in IEEE Internet Computing, vol. 9, no. , pp. 28-34, 2005.