Most probable direct mode for chroma intra mode coding

Bumyoon Kim; Jeeyoon Park; Byeungwoo Jeon

doi:10.1117/12.2590980

13 March 2021 Most probable direct mode for chroma intra mode coding

Bumyoon Kim, Jeeyoon Park, Byeungwoo Jeon

Proceedings Volume 11766, International Workshop on Advanced Imaging Technology (IWAIT) 2021; 117660X (2021) https://doi.org/10.1117/12.2590980
Event: International Workshop on Advanced Imaging Technology 2021 (IWAIT 2021), 2021, Online Only

Abstract

The CST (Chroma Separate Tree) coding tool in VVC (Versatile Video Coding) allows different partition structures in the luma and chroma channels, and it gives significant coding efficiency for the chroma channel. Under CST, the DM mode can be less efficient when the current chroma block and its co-located luma block have different block shapes and sizes, thus less correlated. To solve this potential problem, we investigate a slightly modified DM mode, so called MPDM (Most Probable Direct Mode), to increase coding efficiency of the chroma intra coding. The proposed method is shown to achieve BDBR gain of -0.03% in the Y channel, -0.25% and -0.24% in the Cb and Cr channels, respectively.

Citation Download Citation

Bumyoon Kim, Jeeyoon Park, and Byeungwoo Jeon "Most probable direct mode for chroma intra mode coding", Proc. SPIE 11766, International Workshop on Advanced Imaging Technology (IWAIT) 2021, 117660X (13 March 2021); https://doi.org/10.1117/12.2590980

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