NDLI: A strictly improved achievable region for multiple descriptions using combinatorial message sharing

Content Provider	IEEE Xplore Digital Library
Author	Viswanatha, K. Akyol, E. Rose, K.
Copyright Year	2011
Description	Author affiliation: ECE Department, University of California - Santa Barbara (Viswanatha, K.; Akyol, E.; Rose, K.)
Abstract	We recently proposed a new coding scheme for the L-channel multiple descriptions (MD) problem for general sources and distortion measures involving ‘Combinatorial Message Sharing’ (CMS) [7] leading to a new achievable rate-distortion region. Our objective in this paper is to establish that this coding scheme strictly subsumes the most popular region for this problem due to Venkataramani, Kramer and Goyal (VKG) [3]. In particular, we show that for a binary symmetric source under Hamming distortion measure, the CMS scheme provides a strictly larger region for all L> 2. The principle of the CMS coding scheme is to include a common message in every subset of the descriptions, unlike the VKG scheme which sends a single common message in all the descriptions. In essence, we show that allowing for a common codeword in every subset of descriptions provides better freedom in coordinating the messages which can be exploited constructively to achieve points outside the VKG region.
Starting Page	100
Ending Page	104
File Size	558648
Page Count	5
File Format	PDF
ISBN	9781457704383
e-ISBN	9781457704376
DOI	10.1109/ITW.2011.6089354
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-16
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Encoding Random variables Distortion measurement Rate-distortion Decoding Indexes Rate distortion theory Multiple descriptions coding Source coding
Content Type	Text
Resource Type	Article

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