Patent ID: 11909986
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A video decoding apparatus comprising:
an inter predictor configured to:
determine whether to perform optical flow based compensation by using at least one of a size of a current block, flag information related to whether to perform the optical flow based compensation, a picture order count (POC) difference, and whether the current block is bi-predicted;
if it is determined to perform the optical flow based compensation, obtain a first displacement vector in a horizontal direction and a second displacement vector in a vertical direction for a pixel group; and
obtain a predicted pixel value of the current block based on a pixel value of a first reference block, a pixel value of a second reference block and a value obtained by using the first displacement vector and the second displacement vector for the pixel group, and

a decoder configured to reconstruct the current block based on the predicted pixel value,
wherein:
the flag information is obtained from a bitstream,
the POC difference is a difference between a POC of a reference picture and a POC of a current picture, and
the pixel group is N×N block, N being equal to or greater than 2.