US 12,081,740 B2
Image/video coding method and device based on weighted prediction
Seethal Paluri, Seoul (KR); Hendry Hendry, Seoul (KR); Jie Zhao, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Mar. 28, 2023, as Appl. No. 18/127,257.
Application 18/127,257 is a continuation of application No. 17/843,872, filed on Jun. 17, 2022, granted, now 11,652,986.
Application 17/843,872 is a continuation of application No. PCT/KR2020/018134, filed on Dec. 11, 2020.
Claims priority of provisional application 62/950,963, filed on Dec. 20, 2019.
Prior Publication US 2023/0239463 A1, Jul. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/70 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/137 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/137 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A decoding apparatus for an image decoding, the decoding apparatus comprising:
a memory; and
at least one processor connected to the memory, the at least one processor configured to:
parse L0 number information on weighted reference pictures in a reference picture list 0 from a prediction weighted table syntax;
parse L1 number information on weighted reference pictures in a reference picture list 1 from the prediction weight table syntax;
derive weightings for weighted prediction based on the L0 number information and the L1 number information;
derive prediction samples for a current block by performing the weighted prediction on the current block based on the weightings; and
reconstruct a current picture based on the prediction samples,
wherein the prediction weighted table syntax is comprised in a picture header of a bitstream,
wherein the L1 number information is different from the L0 number information,
wherein the L0 number information and the L1 number information are present in the prediction weighted table syntax comprised in the picture header,
wherein the weightings are derived based on:
parsing luma weighting factor-related L0 flag information for the reference picture list 0 from the prediction weighted table syntax based on the L0 number information,
parsing chroma weighting factor-related L0 flag information for the reference picture list 0 from the prediction weighted table syntax,
parsing delta luma weighting factor-related L0 information from the prediction weighted table syntax based on the luma weighting factor-related L0 flag information,
parsing delta chroma weighting factor-related L0 information from the prediction weighted table syntax based on the chroma weighting factor-related L0 flag information, and
wherein a parsing order of the chroma weighting factor-related L0 flag information is after a parsing order of the luma weighting factor-related L0 flag information and before a parsing order of the delta luma weighting factor-related L0 information.