US 12,244,838 B2
Video decoding method, apparatus, and computer-readable medium with sub-block transform partitioning
Liqiang Wang, Shenzhen (CN)
Assigned to TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED, Shenzhen (CN)
Filed by TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED, Shenzhen (CN)
Filed on Dec. 5, 2022, as Appl. No. 18/074,855.
Application 18/074,855 is a continuation of application No. PCT/CN2022/071732, filed on Jan. 13, 2022.
Claims priority of application No. 202110194810.5 (CN), filed on Feb. 21, 2021.
Prior Publication US 2023/0104359 A1, Apr. 6, 2023
Int. Cl. H04N 19/44 (2014.01); H04N 19/119 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/119 (2014.11); H04N 19/176 (2014.11)] 12 Claims
OG exemplary drawing
 
1. A video decoding method, comprising:
acquiring a coding block of a video image frame;
determining a partitioning mode available to the coding block according to a size of the coding block and an allowable maximum sub-block size ratio when determining that sub-block transform (SBT) is to be performed on the coding block;
determining, based on the partitioning mode available to the coding block, a target partitioning mode used during the SBT performed on the coding block; and
partitioning the coding block based on the target partitioning mode, and decoding a plurality of sub-blocks obtained through the partitioning,
wherein determining a partitioning mode available to the coding block comprises at least one of:
allowing a vertical half partitioning mode for the coding block when determining that a width of the coding block is greater than or equal to 8 and twice a height of the coding block is less than or equal to a product of the width and the maximum sub-block size ratio, or otherwise prohibiting the vertical half partitioning mode for the coding block;
allowing a vertical quad partitioning mode for the coding block when determining that a width of the coding block is greater than or equal to 16 and 4 times a height of the coding block is less than or equal to a product of the width and the maximum sub-block size ratio, or otherwise prohibiting the vertical quad partitioning mode for the coding block;
allowing a horizontal half partitioning mode for the coding block when determining that a height of the coding block is greater than or equal to 8 and twice a width of the coding block is less than or equal to a product of the height and the maximum sub-block size ratio, or otherwise prohibiting the horizontal half partitioning mode for the coding block; or
allowing a horizontal quad partitioning mode for the coding block when determining that a height of the coding block is greater than or equal to 16 and 4 times a width of the coding block is less than or equal to a product of the height and the maximum sub-block size ratio, or otherwise prohibiting the horizontal quad partitioning mode for the coding block.