DEVICE AND SIGNALING OF ADAPTIVE LOOP FILTER (ALF) ON BLOCK BASIS Russian patent published in 2022 - IPC H04N19/117 H04N19/82 

FIELD: video encoding/decoding.

SUBSTANCE: method for adaptive loop filtration of video data is proposed. The method contains a stage, at which multiple sets of adaptive loop filters applicable to a slice are determined at a slice level. A set of adaptive loop filters of the mentioned multiple sets of adaptive loop filters is determined at a block level for a current image block, while the current image block is a coding tree unit (CTU) of the mentioned slice, and the set of adaptive loop filters includes multiple adaptive loop filters including one or more previous adaptive loop filters and additionally including a fixed adaptive loop filter. Next, adaptive loop filtration of the current image block is performed in accordance with the set of adaptive loop filters.

EFFECT: increase in the efficiency of adaptive loop filtration by reduction in signaling costs and computational complexity.

36 cl, 11 dwg, 2 tbl