E-model MOS Estimate Improvement through Jitter Buffer Packet Loss Modelling
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| Title | E-model MOS Estimate Improvement through Jitter Buffer Packet Loss Modelling |
| Authors | |
| Abstract | Proposed article analyses dependence of MOS as a voice call quality (QoS) measure estimated through ITU-T E-model under real network conditions with jitter. In this paper, a method of jitter effect is proposed. Jitter as voice packet time uncertainty appears as increased packet loss caused by jitter memory buffer under- or overflow. Jitter buffer behaviour at receiver’s side is modelled as Pareto/D/1/K system with Pareto-distributed packet interarrival times and its performance is experimentally evaluated by using statistic tools. Jitter buffer stochastic model is then incorporated into E-model in an additive manner accounting for network jitter effects via excess packet loss complementing measured network packet loss. Proposed modification of E-model input parameter adds two degrees of freedom in modelling: network jitter and jitter buffer size. |
| Publisher | Faculty of Electrical Engineering and Computer Science |
| Date | 2011-12-27 |
| Source | Advances in Electrical and Electronic Engineering Vol 9, No 5 (2011): Special Issue |
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