US 12,273,506 B2
Multilayer-based image coding method in video or image coding system
Hendry Hendry, Seoul (KR); Junghak Nam, Seoul (KR); Hyeongmoon Jang, Seoul (KR); Jaehyun Lim, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/927,108
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed May 11, 2021, PCT No. PCT/KR2021/005872
§ 371(c)(1), (2) Date Nov. 22, 2022,
PCT Pub. No. WO2021/235759, PCT Pub. Date Nov. 25, 2021.
Claims priority of provisional application 63/028,600, filed on May 22, 2020.
Prior Publication US 2023/0209041 A1, Jun. 29, 2023
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/174 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11)] 14 Claims
OG exemplary drawing
 
1. A multi-layer based image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information comprising information related to a reference picture list through a bitstream;
deriving the reference picture list based on the information related to the reference picture list;
generating prediction samples of a current block by performing prediction on the current block based on a reference picture comprised in the reference picture list; and
generating a reconstructed picture comprising reconstructed samples based on the prediction samples,
wherein the information related to the reference picture list comprises information related to an inter-layer reference picture (ILRP),
wherein the information related to the ILRP comprises a delta ILRP index information used to represent a layer index of the ILRP,
wherein the image information comprises a reference picture list structure field,
wherein the reference picture list structure field comprises flag information related to whether an ILRP is used,
wherein the delta ILRP index information is comprised in the reference picture list structure field based on a value of the flag information related to whether an ILRP is used being equal to 1,
wherein the reference picture list structure field is comprised in a Sequence Parameter Set (SPS),
wherein a value of the delta ILRP index information is included in a range of 0 to a value of a syntax element vps_max_layers_minus1, and
wherein the syntax element vps_max_layers_minus1 represents a maximum allowed number of layers in each CVS referring to a Video Parameter Set (VPS).