Video coding with optimal inter/intra-mode switching for packet loss resilience

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...

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Vydané v:IEEE journal on selected areas in communications Ročník 18; číslo 6; s. 966 - 976
Hlavní autori: Zhang, R., Regunathan, S.L., Rose, K.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York IEEE 01.06.2000
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Computational efficiency
Computational modeling
Computer simulation
Decoding
Degradation
Distortion
Errors
Estimates
Feedback
Networks
Optimization
Packet switching
Propagation losses
Quantization
Rate-distortion
Resilience
Studies
Switching
Video coding
ISSN:0733-8716, 1558-0008
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Popis
Shrnutí: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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ISSN:0733-8716
1558-0008
DOI:10.1109/49.848250