Patent ID: 11949904
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of decoding an image, comprising:
obtaining a reference index of a collocated picture being used for a motion vector prediction;
based on that a reference picture of a spatial neighboring block around a current block is the same as one pre-determined reference picture among reference pictures included in a reference picture list, deriving a collocated block of the current block in the one pre-determined reference picture using a motion vector of the spatial neighboring block, wherein the one pre-determined reference picture is based on the reference index of the collocated picture;
deriving motion vectors of sub-blocks in the current block based on the motion vector of the collocated block;
generating prediction samples of the current block based on the motion vectors of the sub-blocks; and
generating reconstructed samples of the current block based on the prediction samples,
wherein the one pre-determined reference picture is loaded in a picture header or a slice header.