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On the rate region of the vector gaussian one-helper distributed source-coding problem
KTH, School of Electrical Engineering (EES), Sound and Image Processing.
2011 (English)In: 2011 DATA COMPRESSION CONFERENCE (DCC), 2011, 263-272 p.Conference paper (Refereed)
Abstract [en]

In this paper we consider the rate region of the vector Gaussian one-helper distributed source coding problem. In particular, we derive optimality conditions under which a weighted sum rate is minimum by using a contradiction-based argument. When the sources are specified to be scalar, the optimality conditions can always be constructed for any weighted sum rate. In the derivation of the optimality conditions, we introduce a new concept of "source enhancement", which can be viewed as a dual to the well-known "channel enhancement" technique. In particular, source enhancement refers to the operation of increasing the covariance matrix of a Gaussian source in a partial ordering sense. This new technique makes the derivation of the optimality conditions straightforward.

Place, publisher, year, edition, pages
2011. 263-272 p.
, IEEE Data Compression Conference, ISSN 1068-0314
National Category
Computer Systems
URN: urn:nbn:se:kth:diva-92452DOI: 10.1109/DCC.2011.33ISI: 000298610800027ScopusID: 2-s2.0-79955739408ISBN: 978-0-7695-4352-9OAI: diva2:513903
Data Compression Conference (DCC) MAR 29-31, 2011 UT
QC 20120404Available from: 2012-04-04 Created: 2012-04-02 Last updated: 2012-04-04Bibliographically approved

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