12th Annual Conference of the International Speech Communication Association

Florence, Italy
August 27-31. 2011

Improved Quality for Conversational VoIP Using Path Diversity

Qipeng Gong, Peter Kabal

McGill University, Canada

In Voice-over-IP, the quality of interactive conversation is important to users. Quality-based playout buffering seeks an optimum balance between delay and loss. However, such a scheme still suffers when packet losses are bursty. Path diversity can alleviate the effect of losses and improve perceived quality by providing redundancy. In this paper, a new scheme is proposed which evaluates the performance of both paths. We consider three different path diversity schemes. The playout scheduling algorithms are designed based on conversational quality including both calling quality and interactivity. The simulation results show the efficacy of our algorithms in correcting for losses (isolated and burst) and improving perceived conversational quality.

Full Paper

Bibliographic reference.  Gong, Qipeng / Kabal, Peter (2011): "Improved quality for conversational voIP using path diversity", In INTERSPEECH-2011, 2549-2552.