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http://dx.doi.org/10.7776/ASK.2014.33.2.133

Playout Scheduling Method Based on Adaptive Jitter Estimation for Enhancing VoIP Speech Quality  

Ryu, Sang-Hyeon (광운대학교 전파공학과)
Kim, Hyoung-Gook (광운대학교 전파공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.33, no.2, 2014 , pp. 133-138 More about this Journal
Abstract
Packet arrival-delay variation, so-called 'jitter' is one of the main factors that degrade the quality of voice in mobile devices at the Voice over Internet Protocol (VoIP). To resolve this issue, a playout scheduling based on adaptive jitter estimation for enhancing VoIP speech quality is proposed. The proposed algorithm copes with the effect of transmission jitter by expanding or compressing each packet according to the predicted network delay and variations. Additionally, the active network jitter estimation incorporates rapid detection of delay spikes and reacts to changes in network conditions. The experimental results have shown that the proposed algorithm delivers high voice quality in unstable network environment.
Keywords
VoIP; Jitter estmation; Playout scheduling; Packet compression;
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