Patent ID: 11917194
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
obtaining inter prediction information of a current block within a current picture and wraparound information from a bitstream; and
generating a prediction block of the current block based on the inter prediction information and the wraparound information,
wherein the wraparound information comprises a first flag and a second flag, the first flag specifying whether wraparound motion compensation is enabled for a current video sequence including the current picture, and the second flag specifying whether the wraparound motion compensation is enabled for the current picture,
wherein, when the current video sequence includes at least one subpicture being treated as a picture and having a width different from a value being derived based on information on a maximum width of a picture in the current video sequence, the first flag obtained from the bitstream is constrained to have a first value specifying that the wraparound motion compensation is disabled for the current video sequence, and
wherein the second flag has a first value specifying that the wraparound motion compensation is disabled for the current picture when the first flag has the first value.