An unequal error protection trellis coding scheme for still image communication

Fady Alajaji, Saud Al-Semari, Philippe Burlina

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The source and channel coding functions of a communication system are usually designed independently of one another. This is justified by Shannon's separation principle (1948), which indicates that no performance loss is suffered if the two functions are thus partitioned. However, Shannon's theorem is an asymptotic result that permits unlimited delay and complexity; given a constraint on complexity/delay, joint source-channel coding may outperform separately designed pairs. In this work, we consider the problem of reliable communication of compressed still grey-level images over very noisy channels. An unequal error protection (UEP) joint source-channel coding scheme is proposed for transmitting discrete-cosine transform (DCT) encoded images over an additive white Gaussian noise (AWGN) channel used in conjunction with coherent M-ary phase shift keying (MPSK) modulation. More specifically, it consists of a sequence maximum a posteriori (MAP) detection scheme that exploits both the channel soft decision information and the statistical image characteristics.

Original languageEnglish (US)
Title of host publicationProceedings - 1997 IEEE International Symposium on Information Theory, ISIT 1997
Number of pages1
DOIs
StatePublished - Dec 1 1997
Event1997 IEEE International Symposium on Information Theory, ISIT 1997 - Ulm, Germany
Duration: Jun 29 1997Jul 4 1997

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8095

Other

Other1997 IEEE International Symposium on Information Theory, ISIT 1997
CountryGermany
CityUlm
Period6/29/977/4/97

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Modeling and Simulation
  • Applied Mathematics

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