METHOD AND DEVICE FOR INTRA-PREDICTION IN WHICH PREDICTION BLOCK IS DIVIDED INTO SUB-BLOCKS AND PREDICTION IN SUB-BLOCKS Russian patent published in 2023 - IPC H04N19/117 H04N19/132 H04N19/593 

FIELD: video encoding and decoding.

SUBSTANCE: method and apparatus for intra-prediction is proposed, in which a prediction unit is divided into sub-blocks and predicted in sub-blocks. The video decoding method includes: determining whether to divide the current block into a plurality of sub-blocks; when the current block is divided into a plurality of sub-blocks, determining the division direction for the current block between the horizontal and vertical division direction and the number of sub-blocks based on the division information decoded from the bitstream and the width and height of the current block; restoring the current block by sequentially restoring sub-blocks that are indicated according to the split direction and the number of sub-blocks using intra-prediction; and setting a grid of N samples at regular intervals in the horizontal and vertical directions, and performing deblocking filtering among boundaries between sub-blocks in the current block that match the grid boundary.

EFFECT: capability of providing intra-prediction for dividing the prediction unit into sub-blocks in such a way as to place the reconstructed neighbouring samples used to predict the current sample so that it is closer to the current sample, and predict block sub-blocks using the general intra-prediction mode.

10 cl, 2 tbl, 14 dwg