Accuracy enhancement in intra- and inter-frame example search for lossless video coding

Koji Nemoto; Yusuke Kameda; Ichiro Matsuda; Susumu Itoh; Kyohei Unno; Sei Naito

doi:10.1117/12.2567004

1 June 2020 Accuracy enhancement in intra- and inter-frame example search for lossless video coding

Koji Nemoto, Yusuke Kameda, Ichiro Matsuda, Susumu Itoh, Kyohei Unno, Sei Naito

Proceedings Volume 11515, International Workshop on Advanced Imaging Technology (IWAIT) 2020; 115150U (2020) https://doi.org/10.1117/12.2567004
Event: International Workshop on Advanced Imaging Technologies 2020 (IWAIT 2020), 2020, Yogyakarta, Indonesia

Abstract

We previously proposed a lossless video coding method based on intra/inter-frame example search and probability model optimization. In this method, several examples, i.e. a set of pels whose neighborhoods are similar to a local texture of the target pel to be encoded, are searched from already encoded areas of the current and previous frames with integer pel accuracy. Probability distribution of an image value at the target pel is then modeled as weighted sum of the Gaussian functions whose peaked positions are given by the individual examples. Furthermore, model parameters that control shapes of the Gaussian functions are numerically optimized so that the resulting coding rate can be a minimum. In this paper, the above example search process is enhanced to allow fractional-pel positions for more accurate probability modeling.

Citation Download Citation

Koji Nemoto, Yusuke Kameda, Ichiro Matsuda, Susumu Itoh, Kyohei Unno, and Sei Naito "Accuracy enhancement in intra- and inter-frame example search for lossless video coding", Proc. SPIE 11515, International Workshop on Advanced Imaging Technology (IWAIT) 2020, 115150U (1 June 2020); https://doi.org/10.1117/12.2567004

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