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2006 IEEE International Symposium on Circuits and Systems

DOI: 10.1109/iscas.2006.1693825

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Error resilience transcoding using content-aware intra-refresh based on profit tracing

Journal article published in 2006 by Chih-Ming Chen, Chih-Ming Chen, Yung-Chang Chen, Yung-Chang Chen, Chia-Wen Lin ORCID, C. M. Chen;Y C. Chen;C W. Lin
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This paper is available in a repository.

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Abstract

2030101030014 ; 電機工程學系 ; In this paper, we present a two-pass error-resilience transcoding scheme based on content-aware intra-refresh (CAIR) for inserting error-resilience features to a compressed video. The proposed transcoder can adaptively vary the intrarefresh rate according to the video content and the channel's packet-loss rate to protect the most important macroblocks (MBs) against packet loss. Based on the CAIR transcoder, we propose a profit tracing scheme to improve the efficacy of intra-fresh allocation of the transcoder by avoiding wasting intra-refresh resource in MBs of high error-propagation ranks in a prediction path. Experimental results show that incorporating the proposed profit tracing scheme into CAIR scheme can achieve significant PSNR performance improvement over the CAIR scheme itself.