Cross-Block Difference Guided Fast CU Partition for VVC Intra Coding
This work addresses encoding efficiency for video compression, but it is incremental as it builds on existing VVC standards.
The paper tackles the problem of reducing encoding time in VVC intra coding by proposing a fast CU partition algorithm based on cross-block difference, achieving an average 41.64% time saving with only a 0.97% BD-rate increase.
In this paper, we propose a new fast CU partition algorithm for VVC intra coding based on cross-block difference. This difference is measured by the gradient and the content of sub-blocks obtained from partition and is employed to guide the skipping of unnecessary horizontal and vertical partition modes. With this guidance, a fast determination of block partitions is accordingly achieved. Compared with VVC, our proposed method can save 41.64% (on average) encoding time with only 0.97% (on average) increase of BD-rate.