Combined Source-Channel Coding of Images Using the Block Cosine Transform

James W. Modestino, David G. Daut, Acie L. Vickers

Research output: Contribution to journalArticle

86 Scopus citations


An approach is described for exploiting the tradeoffs between source and channel coding in the context of image transmission. The source encoder employs two-dimensional (2-D) block transform coding using the discrete cosine transform. This technique has proven to be an efficient and readily implementable source coding technique in the absence of channel errors. In the presence of channel errors, however, the performance degrades rapidly, requiring some form of error-control protection if high quality image reconstruction is to be achieved. This channel coding can be extremely wasteful of channel bandwidth if not applied judiciously. The approach described here provides a rationale for combined source-channel coding which provides improved quality image reconstruction without sacrificing transmission bandwidth. This approach is shown to result in a relatively robust design which is reasonably insensitive to channel errors and yet provides performance approaching theoretical performance limits.

Original languageEnglish (US)
Pages (from-to)1261-1274
Number of pages14
JournalIEEE Transactions on Communications
Issue number9
StatePublished - Sep 1981

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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