Patent ID: 11968384
Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Field: nan (nan)
Classification: CPC nan | IPC H

Claim 16:
17. The non-transitory computer-readable storage medium of claim 11, wherein the one or more syntax elements further comprise at least one of: a temporal_mvp_enabled_flag, an mvd_l1_zero_flag, a fourth syntax element specifying a usage of a second prediction mode for the first video picture, or a fifth syntax element specifying a usage of a third prediction mode for the first video picture,
wherein, in the second prediction mode, for a video block in the first video picture, a bi-directional optical flow tool is used to obtain a motion vector offset based on at least one gradient value corresponding to a sample in a reference block of the video block, and
wherein, in the third prediction mode, for a video block in the first video picture, initial prediction samples of a sub-block of the video block coded with an affine mode is generated, and an optical flow operation is applied to generate final prediction samples for the sub-block by deriving a prediction refinement based on motion vector differences dMvH or dMvV, and wherein dMvH and dMvV indicate motion vector differences along a horizontal direction and a vertical direction, respectively.