28 January 2008 Feedback-aided error resilience technique based on Wyner-Ziv coding
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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.
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Liang Liang, Liang Liang, Paul Salama, Paul Salama, Edward J. Delp, Edward J. Delp, } "Feedback-aided error resilience technique based on Wyner-Ziv coding", Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68220T (28 January 2008); doi: 10.1117/12.767283; https://doi.org/10.1117/12.767283
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