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Titolo:
Unequal loss protection: Graceful degradation of image quality over packeterasure channels through forward error correction
Autore:
Mohr, AE; Riskin, EA; Ladner, RE;
Indirizzi:
Univ Washington, Dept Comp Sci & Engn, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 mp Sci & Engn, Seattle, WA 98195 USA Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 pt Elect Engn, Seattle, WA 98195 USA
Titolo Testata:
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
fascicolo: 6, volume: 18, anno: 2000,
pagine: 819 - 828
SICI:
0733-8716(200006)18:6<819:ULPGDO>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
NOISY CHANNELS; PROGRESSIVE TRANSMISSION; EFFICIENT; CODES;
Keywords:
joint source/channel coding; lossy image transmission; lossy packet networks; packet erasure channel; packet loss; priority encoding transmission; Reed-Solomon coding; unequal loss protection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Mohr, AE Univ Washington, Dept Comp Sci & Engn, Seattle, WA 98195 USA UnivWashington Seattle WA USA 98195 Engn, Seattle, WA 98195 USA
Citazione:
A.E. Mohr et al., "Unequal loss protection: Graceful degradation of image quality over packeterasure channels through forward error correction", IEEE J SEL, 18(6), 2000, pp. 819-828

Abstract

We present the unequal loss protection (ULP) framework in which unequal amounts of forward error correction are applied to progressive data to provide graceful degradation of image quality as packet losses increase. We develop a simple algorithm that can find a good assignment within the ULP framework. We use the Set Partitioning in Hierarchical Trees coder in this work, but our algorithm can protect any progressive compression scheme. In addition, we promote the use of a PMF of expected channel conditions so that our system can work with almost any model or estimate of packet losses, We fmd that when optimizing for an exponential packet loss model with a mean loss rate of 20% and using a total rate of 0.2 bits per pixel on the Lenna image, good image quality can be obtained even when 40% of transmitted packets are lost.

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Documento generato il 24/09/20 alle ore 04:39:39