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Tables for practical Wyner-Ziv coding of Laplacian sources

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1 Author(s)
Mukherjee, D. ; HP Labs., Palo Alto, CA

Many practical coding scenarios deal with sources with transform coefficients that are well modeled as Laplacians. For the Wyner-Ziv coding problem for such sources when correlated side-information is available at the decoder, the side-information is modeled as obtained by independent additive Laplacian or Gaussian innovation on the source. This paper deals with the optimal choice of encoding parameters for practical Wyner-Ziv coding in such scenarios, using the same quantizer family as in the regular codec to cover a range of rate-distortion trade-offs, given the variances of the source and innovation. Using our prior analysis of a general encoding model based on multi-level coset codes combining source and channel coding, we present comprehensive tables with optimal encoding parameters. These tables can be readily incorporated into a practical codec to read off the encoding parameters.

Published in:

Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on

Date of Conference:

19-24 April 2009