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On the Symmetric Gaussian Multiple Description Rate-Distortion Function

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On the Symmetric Gaussian Multiple Description Rate-Distortion Function
We consider symmetric multiple description coding for the Gaussian source, and provide upper and lower bounds for the individual description rate-distortion function. One of the main contributions of this work is a novel lower bound on the sum rate under symmetric distortion constraints, which yields a lower bound on the individual rate for the symmetric case. Two upper bounds are derived, the first of which is based on successive refinement coding coupled with multilevel diversity coding (SR-MLD), and the second is based on the multi-layer coding scheme proposed in literature. We show that the gaps between the lower bound and the upper bounds are no larger than certain constants depending only on the number of descriptions, but not the distortion constraints. Moreover, regardless of the number of descriptions, the gap between the lower bound and the upper bound using the SR-MLD coding scheme is less than
Chao Tian, Soheil Mohajer, Suhas N. Diggavi
Added 29 May 2010
Updated 29 May 2010
Type Conference
Year 2008
Where DCC
Authors Chao Tian, Soheil Mohajer, Suhas N. Diggavi
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