Patent ID: 11870981
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A video encoding method comprising:
determining an intra prediction mode of a current block;
performing intra prediction using the intra prediction mode;
when a width of the current block is greater than a height of the current block and the intra prediction mode indicates a second upper-right direction, replacing the intra prediction mode with a first intra prediction mode indicating a first lower-left direction;
when the height of the current block is greater than the width of the current block and the intra prediction mode indicates a second lower-left direction, replacing the intra prediction mode with a first intra prediction mode indicating a first upper-right direction;
encoding intra prediction mode information indicating the first intra prediction mode,
wherein, when a value of the intra prediction mode is A (where A is an integer), the first intra prediction mode is obtained by subtracting a predetermined value from A or adding a predetermined value to A.