NDLI: Joint Source–Channel Turbo Techniques for Discrete-Valued Sources: From Theory to Practice

Content Provider	IEEE Xplore Digital Library
Author	Jaspar, X. Guillemot, C. Vandendorpe, L.
Copyright Year	1963
Abstract	The principles which have been prevailing so far for designing communication systems rely on Shannon's source and channel coding separation theorem. This theorem states that source and channel optimum performance bounds can be approached as close as desired by designing independently the source and channel coding strategies. However, this theorem holds only under asymptotic conditions, where both codes are allowed infinite length and complexity. If the design of the system is constrained in terms of delay and complexity, if the sources are not stationary, or if the channels are nonergodic, separate design and optimization of the source and channel coders can be largely suboptimal. For practical systems, joint source-channel (de)coding may reduce the end-to-end distortion. It is one of the aspects covered by the term cross-layer design, meaning a rethinking of the layer separation principle. This article focuses on recent developments of joint source-channel turbo coding and decoding techniques, which are described in the framework of normal factor graphs. The scope is restricted to lossless compression and discrete-valued sources. The presented techniques can be applied to the quantized values of a lossy source codec but the quantizer itself and its impact are not considered.
Sponsorship	IEEE Publication
Starting Page	1345
Ending Page	1361
Page Count	17
File Size	1062560
File Format	PDF
ISSN	00189219
Volume Number	95
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decoding Communication systems Channel coding Constraint optimization Design optimization Cross layer design Error probability Delay Turbo codes Codecs turbo principle Channel code cross-layer design iterative decoding joint source–channel code source code
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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