US 12,439,027 B2
Apparatuses for encoding and decoding image, and methods for encoding and decoding image thereby
Woongil Choi, Suwon-si (KR); Minsoo Park, Suwon-si (KR); Minwoo Park, Suwon-si (KR); Seungsoo Jeong, Suwon-si (KR); Kiho Choi, Suwon-si (KR); Narae Choi, Suwon-si (KR); Anish Tamse, Suwon-si (KR); and Yinji Piao, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Appl. No. 17/434,657
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
PCT Filed Feb. 28, 2020, PCT No. PCT/KR2020/002924
§ 371(c)(1), (2) Date Mar. 7, 2022,
PCT Pub. No. WO2020/175967, PCT Pub. Date Sep. 3, 2020.
Claims priority of provisional application 62/811,764, filed on Feb. 28, 2019.
Prior Publication US 2023/0103665 A1, Apr. 6, 2023
Int. Cl. H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/30 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/176 (2014.11); H04N 19/30 (2014.11)] 4 Claims
OG exemplary drawing
 
1. An image decoding method comprising:
obtaining, from a sequence parameter set of a bitstream, information about a plurality of first reference picture lists for a picture sequence including a current picture;
obtaining, from a slice header of the bitstream, an indicator for a current slice in the current picture;
if a first reference picture list indicated by the indicator among the plurality of first reference picture lists does not include a picture order count (POC)-related information about a long-term type reference picture, obtaining the POC-related information about the long-term type reference picture from the slice header of the bitstream;
constituting a second reference picture list by using the POC-related information about the long-term type reference picture and a POC-related information about a short-term type reference picture included in the first reference picture list indicated by the indicator;
obtaining a predicted sample of a current sample included in the current picture based on a reference picture included in the second reference picture list;
obtaining information indicating a post-processing parameter set from among a plurality of post-processing parameter sets, the post-processing parameter set being applied to luma mapping for the current picture;
obtaining one or more luma mapping parameters from the post-processing parameter set of the bitstream, the post-processing parameter set being different from the sequence parameter set;
obtaining a modified predicted sample by changing the predicted sample based on the one or more luma mapping parameters obtained from the post-processing parameter set; and
obtaining a reconstructed sample of the current sample included the current picture based on the modified predicted sample.