000086011 001__ 86011
000086011 005__ 20190316233738.0
000086011 02470 $$2DAR$$a12049
000086011 037__ $$aREP_WORK
000086011 245__ $$aMultiuser Successive Refinement and Multiple Description Coding
000086011 269__ $$a2007
000086011 260__ $$c2007
000086011 336__ $$aReports
000086011 520__ $$aWe consider the multiuser successive refinement (MSR) problem, where the users are connected to a central server via links with different noiseless capacities, and each user wishes to reconstruct in a successive-refinement fashion. An achievable region is given for the two-user two-layer case and it provides the complete rate-distortion region for the Gaussian source under the MSE distortion measure. The key observation is that this problem includes multiple description (MD) coding as a subsystem, and the techniques useful in the MD problem can be extended to this case. We show that the coding scheme based on the universality of random binning is sub-optimal, because multiple Gaussian side informations only at the decoders do incur performance loss, in contrast to the case of single side information at the decoder. We further show that unlike the single user case, when there are multiple users, the loss of performance by a multistage coding approach can be unbounded for the Gaussian source. The result suggests that in such a setting, the benefit of using successive refinement is not likely to justify the accompanying performance loss. The MSR problem is also related to the source coding problem where each decoder has its individual side information, while the encoder has the complete set of the side informations. The MSR problem further includes several variations of the MD problem, for which the specialization of the general result is investigated and the implication is discussed.
000086011 6531_ $$aMultiple descriptions
000086011 6531_ $$asuccessive refinement
000086011 6531_ $$arate-distortion theory
000086011 700__ $$0241090$$aTian, Chao$$g169476
000086011 700__ $$aChen, Jun
000086011 700__ $$0241953$$aDiggavi, Suhas$$g157468
000086011 8564_ $$s251460$$uhttps://infoscience.epfl.ch/record/86011/files/MSR_EPFL_Tech.pdf$$zn/a
000086011 909C0 $$0252133$$pLICOS$$xU10880
000086011 909CO $$ooai:infoscience.tind.io:86011$$preport$$qGLOBAL_SET
000086011 937__ $$aLICOS-REPORT-2006-002
000086011 973__ $$aEPFL$$sPUBLISHED
000086011 980__ $$aREPORT