US 11,671,620 B2
Video decoding apparatus and video coding apparatus
Takeshi Chujoh, Sakai (JP); Tomoko Aono, Sakai (JP); Tomohiro Ikai, Sakai (JP); Eiichi Sasaki, Sakai (JP); and Yukinobu Yasugi, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed by Sharp Kabushiki Kaisha, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
Filed on Dec. 8, 2021, as Appl. No. 17/544,991.
Application 17/544,991 is a continuation of application No. 16/960,108, granted, now 11,212,551, previously published as PCT/JP2019/000257, filed on Jan. 8, 2019.
Claims priority of application No. 2018-001191 (JP), filed on Jan. 9, 2018; and application No. 2018-175146 (JP), filed on Sep. 19, 2018.
Prior Publication US 2022/0094973 A1, Mar. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/52 (2014.01); H04N 19/56 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/52 (2014.11) [H04N 19/176 (2014.11); H04N 19/56 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A motion vector derivation apparatus to derive a motion vector for each of multiple subblocks, the motion vector derivation apparatus comprising:
a matching prediction processing circuit that derives a first prediction block by using a first reference picture and a second prediction block by using a second reference picture; wherein
the matching prediction processing circuit derives a sum of an absolute difference between the first prediction block, which is defined by a first location, and the second prediction block, which is defined by a second location,
the matching prediction processing circuit derives an initial motion vector by using the sum of the absolute difference,
the matching prediction processing circuit derives the motion vector of a subblock by using the initial motion vector, and
the sum of the absolute difference is derived by correcting values of the first prediction block and the second prediction block with a shift value corresponding to a bit depth value.