US 12,278,972 B2
Image coding/decoding method and device for selectively signaling filter availability information, and method for transmitting bitstream
Nae Ri Park, Seoul (KR); Jung Hak Nam, Seoul (KR); and Hyeong Moon Jang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/797,953
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Feb. 15, 2021, PCT No. PCT/KR2021/001856
§ 371(c)(1), (2) Date Aug. 5, 2022,
PCT Pub. No. WO2021/162494, PCT Pub. Date Aug. 19, 2021.
Claims priority of provisional application 62/977,060, filed on Feb. 14, 2020.
Prior Publication US 2023/0080116 A1, Mar. 16, 2023
Int. Cl. H04N 19/174 (2014.01); H04N 19/117 (2014.01); H04N 19/119 (2014.01); H04N 19/172 (2014.01); H04N 19/46 (2014.01); H04N 19/70 (2014.01); H04N 19/80 (2014.01); H04N 19/85 (2014.01); H04N 19/86 (2014.01)
CPC H04N 19/174 (2014.11) [H04N 19/117 (2014.11); H04N 19/119 (2014.11); H04N 19/172 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11); H04N 19/80 (2014.11); H04N 19/85 (2014.11); H04N 19/86 (2014.11); H04N 19/865 (2014.11)] 10 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
determining a number of tiles in a current picture based on partitioning of the current picture not being limited;
obtaining, from a bitstream, a first flag for filtering on a boundary of a tile based on the number of tiles in the current picture being plural;
determining to perform filtering on the boundary of the tile belonging to the current picture based on a value of the first flag;
obtaining, from the bitstream, a second flag for filtering on a boundary of a slice based on partitioning of the current picture not being limited;
determining to perform filtering on the boundary of the slice belonging to the current picture based on a value of the second flag,
wherein first information on a slice constituting the current picture is obtained from the bitstream based on partitioning of the current picture not being limited,
wherein the second flag is obtained from the bitstream based on the first information on the slice representing that the current picture does not consist of only one slice, and
wherein the second flag is obtained from the bitstream based on second information on the slice representing whether to apply rectangular slice mode to the current picture.