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A Novel SVC VoD System with Rate Adaptation and Error Concealment over GPRS/EDGE Network

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3 Author(s)
Li-Na Zhang ; Dept. of Comput. Sci. & Technol., Tsinghua Univ., Beijing ; Chun Yuan ; Yu-Zhuo Zhong

Considering the high packet losses and low, varying bandwidth of GPRS/EDGE network and limited computation power of handheld devices, we present and implement a novel SVC video-on-demand system for hand-held devices over GPRS/EDGE network. For the purpose of handling varying bitrate, we propose a priority based layer switching (PLS) adaptation scheme for SVC stream, which not only performs online 3-D adaptation more quickly by a simple parser, but also optimizes the video quality in a R-D sense under the bandwidth constraint. To resist packet losses, a motion-detection based adaptive error concealment (MDA) algorithm is proposed, which can achieve a PSNR gain of up to 3dB comparing to existing methods, while maintaining low complexity. Moreover, our proposed system was implemented and tested over existing GPRS/EDGE network deployed in China. The test results demonstrate that the proposed system and schemes have performance advantage in terms of quicker data rate adaptation, higher PSNR and lower overhead.

Published in:

Image and Signal Processing, 2008. CISP '08. Congress on  (Volume:1 )

Date of Conference:

27-30 May 2008

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