US 12,452,410 B2
Affine motion prediction-based video decoding method and device using subblock-based temporal merge candidate in video coding system
Hyeongmoon Jang, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Jun. 5, 2024, as Appl. No. 18/734,752.
Application 18/734,752 is a continuation of application No. 18/126,743, filed on Mar. 27, 2023, granted, now 12,034,917.
Application 18/126,743 is a continuation of application No. 17/420,241, granted, now 11,627,310, issued on Apr. 11, 2023, previously published as PCT/KR2020/000016, filed on Jan. 2, 2020.
Claims priority of provisional application 62/787,741, filed on Jan. 2, 2019.
Prior Publication US 2024/0323357 A1, Sep. 26, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/137 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/137 (2014.11); H04N 19/176 (2014.11)] 11 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
deriving a reference block in a reference picture based on a left neighboring block of a current block;
deriving a subblock-based temporal merging candidate for the current block based on the reference block;
deriving an inherited affine candidate for the current block;
deriving a constructed affine candidate for the current block;
constructing a subblock merge candidate list for the current block including the subblock-based temporal merging candidate, the inherited affine candidate and the constructed affine candidate;
deriving motion information of sub-blocks of the current block based on the subblock merge candidate list;
deriving prediction samples for the current block based on motion information of the sub-blocks;
generating a reconstructed picture based on the prediction samples; and
filtering the reconstructed picture based on at least one of a deblocking filter, a sample adaptive offset, or adaptive loop filter,
wherein based on a size of the current block being W×H, and an x component of a top-left sample position of the current block being a and a v component of the top-left sample position being b, the left neighboring block is a block including a sample at (a−1, b+H−1) coordinates.