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Communication Dans Un Congrès Année : 2024

Fast Intra mode prediction algorithms for SCBs in VVC SCC

Résumé

Versatile Video Coding (VVC) now supports Screen Content Coding (SCC) by integrating two efficient coding modes: Intra Block Copy (IBC) and Palette (PLT). However, the numerous modes and the Quad-Tree Plus Multi-Type Tree (QTMT) structure inherent to VVC contribute to a very high coding complexity. To effectively reduce the computational complexity of VVC SCC, we propose a fast Intra mode prediction algorithm for VVC SCC. More specifically, we first use the difference of minimum Sum of Absolute Transformed Differences (SATD) value of four Directional Modes (DMs) of Intra and the SATD value of the IBC-merge mode to determine whether to early skip Intra checking. Subsequently, we use a decision tree to determine whether to early terminate the checking after block differential pulse coded modulation (BDPCM). Finally, we employ a decision tree to determine whether to early skip multiple transform selection (MTS) and low frequency non-separable transform (LFNST) checking. The results demonstrate that our algorithm achieves an average encoding time reduction of 34.34% with a negligible Bjøntegaard delta bitrate increase of 0.46%.
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Dates et versions

hal-04413636 , version 1 (20-03-2024)

Identifiants

  • HAL Id : hal-04413636 , version 1

Citer

Dayong Wang, Yishen Deng, Weisheng Li, Xin Lu, Frédéric Dufaux, et al.. Fast Intra mode prediction algorithms for SCBs in VVC SCC. International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2024), IEEE, Apr 2024, Seoul, South Korea. ⟨hal-04413636⟩
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