Patent ID: 11902578
Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
receiving a bitstream including a current image;
dividing, based on coding information from the bitstream, a coding block in the current image to obtain one or more sub-blocks,
wherein the coding information includes at least one of a first flag indicating whether to divide the coding block to obtain the one or more sub-blocks, a second flag indicating whether to divide the coding block asymmetrically, or a third flag indicating whether a division direction for the coding block is a horizontal direction or a vertical direction, and
wherein, in case the coding block is divided asymmetrically, a first sub-block having a ¼ size of the coding block is obtained, the first sub-block belonging to the one or more sub-blocks ¾; and
obtaining a residual signal of the coding block by performing inverse-quantization and inverse-transformation on the first sub-block.