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14 March 2005 Systematic lossy error protection versus layered coding with unequal error protection
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Proceedings Volume 5685, Image and Video Communications and Processing 2005; (2005)
Event: Electronic Imaging 2005, 2005, San Jose, California, United States
In this paper we compare two schemes for error-resilient video transmission, viz., systematic lossy error protection, and layered coding with unequal error protection. In the first scheme, the systematic portion consists of the compressed video signal transmitted without channel coding. For error-resilience, an additional bitstream, generated by Wyner-Ziv encoding of the video signal, is transmitted. In the event of channel errors, the Wyner-Ziv description is decoded using the error-prone systematic description as side-information. In the second scheme, the video bitstream is partitioned into two or more layers, and each layer is assigned different amounts of parity information depending upon its relative significance. Since the base layer has heavy protection, a certain minimum video quality is guaranteed at the receiver. We derive information-theoretic conditions for optimality of each of the above systems. We also compare experimentally, the performance of the competing schemes, for a particular application, i.e., Error-resilient digital video broadcasting. It is shown that systematic lossy error protection outperforms layered (scalable) coding by ensuring graceful degradation of video quality without incurring the loss in rate-distortion performance observed in practical layered video coding schemes.
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Shantanu D. Rane and Bernd Girod "Systematic lossy error protection versus layered coding with unequal error protection", Proc. SPIE 5685, Image and Video Communications and Processing 2005, (14 March 2005);


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