DocumentCode :
1197530
Title :
New Results on Multiple Descriptions in the Wyner-Ziv Setting
Author :
Wang, Jia ; Wu, Xiaolin ; Yu, Songyu ; Sun, Jun
Author_Institution :
Dept. of Electr. Eng., Shanghai Jiao Tong Univ., Shanghai
Volume :
55
Issue :
4
fYear :
2009
fDate :
4/1/2009 12:00:00 AM
Firstpage :
1701
Lastpage :
1708
Abstract :
Some new results of multiple descriptions in the Wyner-Ziv setting (MDWZ) are presented. MDWZ uses two pieces of side information (SI) for two different side decoders. Both SI are available to the central decoder, but none to the encoder. The complete achievable region for a quadratic Gaussian MDWZ system is derived. This result is an extension of Ozarow´s result on multiple descriptions of a Gaussian source without SI and Diggavi-Vaishampayan´s result on common SI. It is shown that a refinement layer for the central decoder is indispensable if the central distortion is sufficiently small. The tight rate distortion region is also given if one of the side decoders is required to perfectly reconstruct a deterministic function of the source.
Keywords :
Gaussian processes; source coding; Gaussian source descriptions; Wyner-Ziv setting; central decoder; multiple descriptions; quadratic Gaussian system; refinement layer; side decoders; side information; source deterministic function reconstruction; Bandwidth; Decoding; Helium; Information theory; Rate-distortion; Source coding; Sun; Video coding; EGC region; Wyner-Ziv setting; multiple descriptions; no excess rate case; side information;
fLanguage :
English
Journal_Title :
Information Theory, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9448
Type :
jour
DOI :
10.1109/TIT.2009.2013052
Filename :
4802310
Link To Document :
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