Multiple description coding: Difference between revisions

Revision as of 22:07, 12 January 2010

Revision as of 13:16, 12 November 2010

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{{ArticleMultiple issues|orphan =February 2009|context =October 2009|refimprove =July 2007}}

'''Multiple description coding (MDC)''' is a [[Channel coding|coding]] technique that fragments a single [[Streaming media|media stream]] into ''n'' substreams (''n'' ≥ 2) referred to as descriptions. The [[Packet (information technology)|packets]] of each description are routed over multiple, (partially) disjoint paths. In order to decode the media stream, any description can be used, however, the quality improves with the number of descriptions received in parallel. The idea of MDC is to provide error resilience to media streams. Since an arbitrary subset of descriptions can be used to decode the original stream, network congestion or packet loss — which are common in [[best-effort network]]s such as the [[Internet]] — will not interrupt the stream but only cause a (temporary) loss of quality. The quality of a stream can be expected to be roughly proportional to data rate sustained by the receiver.

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*R. Puri and K. Ramchandran, “Multiple description source coding through forward error correction codes,” IEEE Proceedings Asilomar Conference on Signals, Systems, and Computers, Asilomar, CA, October 1999.

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[[Category:Coding theory]]