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Proceedings Paper

Feedback-aided error resilience technique based on Wyner-Ziv coding
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Paper Abstract

Compressed video is very sensitive to channel errors. A few bit losses can stop the entire decoding process. Therefore, protecting compressed video is always necessary for reliable visual communications. In recent years, Wyner-Ziv lossy coding has been used for error resilience and has achieved improvement over conventional techniques. In our previous work, we proposed an unequal error protection algorithm for protecting data elements in a video stream using a Wyner-Ziv codec. We also presented an improved method by adapting the parity data rates of protected video information to the video content. In this paper, we describe a feedback aided error resilience technique, based on Wyner-Ziv coding. By utilizing feedback regarding current channel packet-loss rates, a turbo coder can adaptively adjust the amount of parity bits needed for correcting corrupted slices at the decoder. This results in an effcient usage of the data rate budget for Wyner-Ziv coding while maintaining good quality decoded video when the data has been corrupted by transmission errors.

Paper Details

Date Published: 28 January 2008
PDF: 9 pages
Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68220T (28 January 2008); doi: 10.1117/12.767283
Show Author Affiliations
Liang Liang, Purdue Univ. (United States)
Paul Salama, Indiana Univ.-Purdue Univ., Indianapolis (United States)
Edward J. Delp, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 6822:
Visual Communications and Image Processing 2008
William A. Pearlman; John W. Woods; Ligang Lu, Editor(s)

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