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

Claim 10:
11. A method of encoding 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; and
performing intra prediction of the current block,
wherein a prediction block of the current block is generated by performing the intra prediction based on the intra prediction mode,
wherein a flag indicating whether a pre-defined default mode is used for the intra prediction of the current block is encoded into a bitstream,
wherein, in response to a case where the default mode is used for the intra prediction of the current block, the intra prediction mode is determined to be the default mode,
wherein, in response to a case where the default mode is not used for the intra prediction of the current block, the intra prediction mode is determined 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.