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Titolo:
Video coding with optimal inter/intra-mode switching for packet loss resilience
Autore:
Zhang, R; Regunathan, SL; Rose, K;
Indirizzi:
Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA Univ Calif Santa Barbara Santa Barbara CA USA 93106 Barbara, CA 93106 USA
Titolo Testata:
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
fascicolo: 6, volume: 18, anno: 2000,
pagine: 966 - 976
SICI:
0733-8716(200006)18:6<966:VCWOIS>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSMISSION; COMPRESSION; CONCEALMENT; STANDARD; IMAGE; H.263;
Keywords:
intra-mode; intra-refresh; packet loss; packet video; rate-distortion; video coding;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Zhang, R Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA Univ Calif Santa Barbara Santa Barbara CA USA 93106 CA 93106 USA
Citazione:
R. Zhang et al., "Video coding with optimal inter/intra-mode switching for packet loss resilience", IEEE J SEL, 18(6), 2000, pp. 966-976

Abstract

Resilience to packet loss is a critical requirement in predictive video coding for transmission over packet-switched networks, since the prediction loop propagates errors and causes substantial degradation in video quality. This work proposes an algorithm to optimally estimate the overall distortion of decoder frame reconstruction due to quantization, error propagation, and error concealment. The method recursively computes the total decoder distortion at pixel level precision to accurately account for spatial and temporal error propagation. The accuracy of the estimate is demonstrated via simulation results. The estimate is integrated into a rate-distortion (RD)-based framework for optimal switching between intra-coding and inter-coding modes per macroblock. The cost in computational complexity is modest. The framework is further extended to optimally exploit feedback/acknowledgment information from the receiver/network. Simulation results both with and without a feedback channel demonstrate that precise distortion estimation enables the coder to achieve substantial and consistent gains in PSNR over known state-of-the-art RD- and non-RD-based mode switching methods.

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Documento generato il 25/09/20 alle ore 00:07:47