US 12,439,074 B2
Method and device for video signal processing
Bae Keun Lee, Gyeonggi-do (KR)
Assigned to KT CORPORATION, Gyeonggi-do (KR)
Filed by KT CORPORATION, Gyeonggi-do (KR)
Filed on Jun. 27, 2023, as Appl. No. 18/214,760.
Application 18/214,760 is a division of application No. 17/526,484, filed on Nov. 15, 2021, granted, now 11,743,483.
Application 17/526,484 is a division of application No. 16/613,940, granted, now 11,206,419, issued on Dec. 21, 2021, previously published as PCT/KR2018/005584, filed on May 16, 2018.
Claims priority of application No. 10-2017-0061086 (KR), filed on May 17, 2017.
Prior Publication US 2023/0353772 A1, Nov. 2, 2023
Int. Cl. H04N 19/513 (2014.01); H04N 19/139 (2014.01); H04N 19/176 (2014.01); H04N 19/583 (2014.01)
CPC H04N 19/513 (2014.11) [H04N 19/139 (2014.11); H04N 19/176 (2014.11); H04N 19/583 (2014.11)] 9 Claims
OG exemplary drawing
 
1. A method of decoding an image with a decoding apparatus, comprising:
dividing, with the decoding apparatus, a coding tree block based on a tree-based division to determine a current block, the tree-based division including at least one of a quad division or a binary division;
determining whether motion information is derived in units of sub-blocks or not;
in response that motion information is derived in units of sub-blocks,
determining, with the decoding apparatus, a temporal neighboring sub-block of a current sub-block in the current block, the temporal neighboring sub-block being included in a source picture referred to by a current picture including the current block;
obtaining, with the decoding apparatus, motion information of the current sub-block in the current block based on the temporal neighboring sub-block; and
obtaining, with the decoding apparatus, prediction samples for the current sub-block in the current block from a reference sub-block in a reference picture,
wherein the temporal neighboring sub-block is specified by a temporal vector derived from a spatial neighboring block adjacent to the current block while the reference sub-block is specified by the motion information derived from the temporal neighboring sub-block, and
wherein the spatial neighboring block is located at a pre-defined position adjacent to the current block.