Intra-distance derived weighted distortion for error resilience

Authors:
Sunday Nyamweno;Ramdas Satyan;Fabrice Labeau
Affiliations:
Department of Electrical and Computer Engineering, McGill University, Montreal, Canada;Department of Electrical and Computer Engineering, McGill University, Montreal, Canada;Department of Electrical and Computer Engineering, McGill University, Montreal, Canada
Venue:
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Year:
2009

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Abstract

Intra coding is one of the most effective ways of reducing the impact of error propagation caused by predictive coding. However, Intra coding requires a higher bitrate when compared to inter coding. In order to use Inter coding and reduce error propagation it is important that Inter macroblocks predict from "safe" areas that have a decreased chance of spreading errors. To this end we propose a low complexity method of biasing the prediction mechanism towards recently intra updated macroblocks. We devise a method of adjusting the distortion used in rate distortion optimization to take into account the temporal distance of the last Intra macroblock. Our simulations show that our Intra-distance Derived Weighting (IDW) method improves video coding performance in a lossy environment by up to 1.4 dB for a modest increase in bitrate.