Patent ID: 11917199
Assignee: INTELLECTUAL DISCOVERY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of decoding an image, the method comprising:
determining a current block by partitioning a coding block in the image based on a tree-based block division;
determining an intra prediction mode of the current block based on a syntax element obtained from a bitstream; and
performing intra prediction of the current block based on the intra prediction mode,
wherein the syntax element comprises a flag indicating whether a pre-defined default mode is used for the intra prediction of the current block,
wherein, in response to the flag indicating that the default mode is used for the intra prediction of the current block, the intra prediction mode is set to the default mode,
wherein, in response to the flag indicating that the default mode is not used for the intra prediction of the current block, the intra prediction mode is derived from a candidate group including a plurality of most probable mode (MPM) candidates,
wherein the default mode is representative of a Planar mode, and
wherein, in response to a case where the current block is partitioned into a plurality of sub-blocks, the intra prediction is sequentially performed in units of the sub-blocks and the plurality of sub-blocks belonging to the current block uses the same intra prediction mode for the intra prediction.