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The rate-distortion (RD) problem for two-layer coding of a pair (X,Y) of correlated sources is considered. The first layer information enables reconstruction of X within a certain distortion DX, while reception of both layers additionally enables reconstruction of Y within distortion DY. Although this problem is a special case of the successive refinement problem, the computation of the RD region for this scenario is nontrivial. Using a general class of outer bounds (analogous to Shannon lower bound in the classical RD theory) to the successive refinement rate-distortion region, the successive coding RD region for the case where (X,Y) is a jointly Gaussian pair and the distortion measure is squared-error is explicitly characterized.
Published in:
Information Theory, IEEE Transactions on
(Volume:55
,
Issue:
9
)
Date of Publication: Sept. 2009
- Page(s):
- 4286 - 4298
- ISSN :
- 0018-9448
- INSPEC Accession Number:
- 10828923
- Digital Object Identifier :
- 10.1109/TIT.2009.2025557
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 August 2009
- Issue Date :
- Sept. 2009
- Sponsored by :
- IEEE Information Theory Society
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