US 12,231,650 B2
Method for predicting subblock-based temporal motion vector and apparatus therefor
Hyeongmoon Jang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Dec. 12, 2023, as Appl. No. 18/537,723.
Application 18/537,723 is a continuation of application No. 17/973,935, filed on Oct. 26, 2022, granted, now 11,889,084.
Application 17/973,935 is a continuation of application No. 17/260,739, granted, now 11,539,958, previously published as PCT/KR2019/008846, filed on Jul. 17, 2019.
Claims priority of provisional application 62/699,718, filed on Jul. 17, 2018.
Prior Publication US 2024/0146933 A1, May 2, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/137 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/137 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A decoding apparatus for image decoding, the decoding apparatus comprising:
a memory; and
at least one processor connected to the memory, the at least one processor configured to:
obtain a flag indicating whether to use a subblock-based temporal motion vector predictor (SbTMVP) candidate from a bitstream,
determine whether to use the SbTMVP candidate of a sub-block unit for a current block based on the flag;
derive the SbTMVP candidate of the sub-block unit for the current block based on motion vectors of corresponding sub-blocks related to current sub-blocks split from the current block;
construct a merge candidate list including the SbTMVP candidate of the sub-block unit for the current block;
generate prediction samples of the current block by deriving motion vectors of the sub-block unit for the current block based on the merge candidate list; and
reconstruct a current picture based on the prediction samples of the current block,
wherein the corresponding sub-blocks are located in a reference picture and the motion vectors of the corresponding sub-blocks are derived based on a motion vector of a left neighboring block for the current block, and
wherein the SbTMVP candidate of the sub-block unit is determined not to be used for the current block based on a size of the current block being smaller than a fixed sub-block size which is pre-defined as a minimum sub-block size of 8×8.