Patent ID: 11924462
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A non-transitory computer readable storage medium storing a bitstream generated by a video encoding method, the bitstream comprising:
prediction mode information of a left lower block split from a current block to indicate whether the left lower block is predicted in an intra prediction mode,
wherein the video encoding method comprises:
determining a decoding order between the left lower block and a right lower block split from the current block, wherein the right lower block is adjacent to a right side of the left lower block;
when the right lower block is decoded prior to the left lower block according to the determined decoding order:
when the left lower block is predicted in the intra prediction mode, determining prediction samples of the left lower block using at least one of a left block, an upper block, and the right lower block;
determining context information for a syntax element of the prediction mode information of the left lower block based on a sum of a value of prediction mode information of the right lower block, a value of prediction mode information of the left block adjacent to a left side of the left lower block and a value of prediction mode information of the upper block adjacent to an upper side of the left lower block, wherein the prediction mode information of the right lower block indicates whether the right lower block is predicted in the intra prediction mode, the prediction mode information of the left block indicates whether the left block is predicted in the intra prediction mode, and the prediction mode information of the upper block indicates whether the upper block is predicted in the intra prediction mode;
obtaining a context index for the syntax element of the prediction mode information of the left lower block using the context information; and
performing context-adaptive arithmetic entropy encoding on the syntax element of the prediction mode information of the left lower block, using the context information, to generate the bitstream.