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首页> 外文期刊>Journal of visual communication & image representation >Using curved angular intra-frame prediction to improve video coding efficiency
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Using curved angular intra-frame prediction to improve video coding efficiency

机译：Using curved angular intra-frame prediction to improve video coding efficiency

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摘要

This article presents a new curved-based intra-frame prediction method for current and upcoming video codingstandards. Our proposal extends conventional straight-line angular modes found on intra-prediction tools tomodel curved texture characteristics, enhancing the intra-frame prediction process. Our work targets the HighEfficiency Video Coding (HEVC) standard for evaluation, although our curved-based method can be used byany other video coding standard. We model curved intra-frame prediction using an offset-based displacementcalculation to each predicted sample. The proposal incurs a small bitstream overhead for transmitting thedisplacement information, which is offset by encoding efficiency gains. Experimental results demonstratereduced residual energy; consequently, improving BD-Rate for the tested sequences. Evaluations applying eightcurve displacement values show an average BD-Rate reduction of 2.69%, 2.49%, and 0.86% for All-Intra-8, All-Intra 10, and Random-Access configurations, respectively. The proposal allows further BD-Rate improvements,albeit at higher encoding complexity.

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