Patent ID: 11902556
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, from a bitstream, video coding layer (VCL) network abstraction layer (NAL) unit type information of a current picture and first flag information specifying whether a subpicture included in the current picture is treated as one picture;
determining a NAL unit type of each of a plurality of slices included in the current picture, based on the obtained VCL NAL unit type information; and
decoding the plurality of slices based on the determined NAL unit type and the first flag information,
wherein the current picture comprises two or more subpictures based on at least some of the plurality of slices having different NAL unit types, and
wherein the first flag information has a predetermined value specifying that each of the two or more subpictures is treated as one picture based on at least some of the plurality of slices having different NAL unit types,
wherein all slices in each subpicture included in the current picture have the same NAL unit type.