US 12,382,053 B2
In-loop filtering-based image coding device and method
Hendry Hendry, Seoul (KR); Naeri Park, Seoul (KR); Hyeongmoon Jang, Seoul (KR); Jaehyun Lim, Seoul (KR); Junghak Nam, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/915,025
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Mar. 15, 2021, PCT No. PCT/KR2021/003143
§ 371(c)(1), (2) Date Sep. 27, 2022,
PCT Pub. No. WO2021/201463, PCT Pub. Date Oct. 7, 2021.
Claims priority of provisional application 63/003,293, filed on Apr. 1, 2020.
Claims priority of provisional application 63/001,464, filed on Mar. 29, 2020.
Prior Publication US 2023/0164321 A1, May 25, 2023
Int. Cl. H04N 19/132 (2014.01); H04N 19/172 (2014.01); H04N 19/46 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/172 (2014.11); H04N 19/46 (2014.11); H04N 19/82 (2014.11)] 15 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, comprising:
obtaining image information including subpicture-related information and residual information through a bitstream;
dividing a current picture into at least one subpicture based on the subpicture-related information;
generating reconstructed samples of the current picture based on the residual information; and
generating modified reconstructed samples based on an in-loop filtering procedure for the reconstructed samples,
wherein the at least one subpicture includes one or more rectangular slices,
wherein the one or more rectangular slices are included in one or more tiles,
wherein the image information includes in-loop filtering-related information,
wherein whether the in-loop filtering procedure for the reconstructed samples is performed across at least one of a boundary of the one or more tiles or a boundary of the one or more rectangular slices in the current picture is determined based on the in-loop filtering-related information,
wherein the image information includes a picture parameter set (PPS) referred by the current picture and a sequence parameter set (SPS) referred by the current picture,
wherein the image information includes a tile boundary in-loop filtering available flag for the at least one subpicture in the current picture,
wherein, based on the tile boundary in-loop filtering available flag for the at least one subpicture, whether the in-loop filtering procedure for the reconstructed samples is performed across the boundary of the one or more tiles in at least one subpicture is determined,
wherein the image information includes a slice boundary in-loop filtering available flag for the one or more tiles in the current picture,
wherein, based on the slice boundary in-loop filtering available flag for the one or more tiles, whether the in-loop filtering procedure for the reconstructed samples is performed across the boundary of the one or more rectangular slices in the one or more tiles is determined, and
wherein tile boundary in-loop filtering available flags for at least two subpictures that contain the one or more rectangular slices that belong to a same tile are identical to each other.