NDLI: Distributed source coding system for correlated Gaussian observations

Content Provider	IEEE Xplore Digital Library
Author	Oohama, Y.
Copyright Year	2009
Description	Author affiliation: Department of Information Science and Intelligent Systems, University of Tokushima, 2-1 Minami Josanjima-Cho, Tokushima 770-8506, Japan (Oohama, Y.)
Abstract	We consider the distributed source coding system for L correlated Gaussian remote sources Xi, i = 1, 2,···, L, where Xi, i = 1, 2, ·, L are L correlated Gaussian random variables. We deal with the case where each of L distributed encoders can not directly observe Xi but its noisy version Yi = Xi +Ni. Here Ni, i = 1,2,···, L are independent additive L Gaussian noises also independent of Xi, i = 1, 2,···, L. On this coding system the determination problem of the rate distortion region remains open. In our previous works, we derived explicit outer and inner bounds of the rate distortion region and explicit sufficient condition for those two to match. In this paper we derive a stronger sufficient condition for the inner and outer bound to match. We further study the sum rate part of the rate distortion region when the correlation has some symmetrical property and derive a new lower bound of the sum rate part. We further derive a sufficient condition for this lower bound to be tight. The derived sufficient condition depends only on the correlation property of the sources and their observations.
Starting Page	193
Ending Page	197
File Size	236367
Page Count	5
File Format	PDF
ISBN	9781424449828
DOI	10.1109/ITW.2009.5351193
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-11
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sufficient conditions Information science Source coding Gaussian noise Conferences Rate-distortion Rate distortion theory Random variables Intelligent systems Information theory
Content Type	Text
Resource Type	Article

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