Home // International Journal On Advances in Telecommunications, volume 5, numbers 1 and 2, 2012 // View article

Adaptive Jitter Buffer based on Quality Optimization under Bursty Packet Loss

Authors:
Liyun Pang
Laszlo Böszörmenyi

Keywords: adaptive jitter buffer; E-Model; AMR WB; time-scaling; bursty packet loss

Abstract:
Quality of voice delivered over packet networks is affected by various factors such as packet loss, end-to-end delay, packet delay variation (jitter) and codec bit rate. Different approaches and models predict speech quality as a function of such impairments. In order to ensure a continuous play-out of voice transmitted over a packet switched network, jitter buffers are commonly used to counter jitter introduced by queuing. In this paper, we propose a new adaptive jitter buffer algorithm based on optimizing the predicted voice quality. The algorithm consists of an adaptive play-out mechanism based on the extended E-Model taking into account packet loss pattern and a time-scaling technique relying on a speech classification mechanism embedded in the decoder. In our work, we apply the time-scaling to the modified AMR WB decoder. Simulation results show that the proposed algorithm outperforms the best existing algorithms in a variety of different network scenarios under bursty packet loss.

Pages: 1 to 10

Copyright: Copyright (c) to authors, 2012. Used with permission.

Publication date: June 30, 2012

Published in: journal

ISSN: 1942-2601