Patent ID: 11876961
Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of decoding an image performed by an image decoding apparatus, comprising:
obtaining a reconstructed picture of a current picture;
determining whether to perform filtering on a boundary of a current division unit based on a predetermined flag, the current division unit being one of a plurality of division units belonging to the current picture; and
performing filtering on the boundary of the current division unit in response to the determination,
wherein each of the division units includes at least one of a sub-picture, a slice, or a tile,
wherein the flag includes at least one of a first flag indicating whether filtering is performed on boundaries of the division units within the current picture or a second flag indicating whether filtering is performed on the boundary of the current division unit,
wherein whether to perform filtering on the boundary of the current division unit is determined by further considering a third flag indicating whether filtering is performed on a boundary of a neighboring division unit adjacent to the current division unit,
wherein when the first flag is a first value, it is restricted so that filtering is not performed on the boundaries of the division units within the current picture, and when the first flag is a second value, the restriction on the boundaries of the division units within the current picture is not imposed, and
wherein the second flag is decoded only when the restriction on the boundaries of the division units within the current picture is not imposed according to the first flag.