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Binary erasure multiple descriptions: Worst-case distortion

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2 Author(s)
Ahmed, Ebad ; Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA ; Wagner, A.B.

We consider a binary erasure version of the n-channel multiple descriptions problem with no excess rate and no distortion for every k out of n descriptions, i.e., any subset of k messages has a total rate of one and allows for perfect reconstruction of the source. Using a worst-case distortion criterion, we present an explicit coding scheme based on Reed-Solomon codes and, for any n and k, characterize its achievable distortion region when m < k messages are received at the decoder. We prove that this scheme is Pareto optimal in the achievable distortions for all n and k for any number of received messages at the decoder, and is optimal for all n and k when a single message is received. We also provide optimality results for a certain range of values of n and k.

Published in:

Information Theory, 2009. ISIT 2009. IEEE International Symposium on

Date of Conference:

June 28 2009-July 3 2009

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