US 12,034,951 B2
Video decoding apparatus
Takeshi Chujoh, Sakai (JP); Eiichi Sasaki, Sakai (JP); Tomonori Hashimoto, Sakai (JP); Tomoko Aono, Sakai (JP); and Tomohiro Ikai, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed by Sharp Kabushiki Kaisha, Sakai (JP)
Filed on Jul. 7, 2022, as Appl. No. 17/859,079.
Application 17/859,079 is a continuation of application No. 17/299,812, granted, now 11,412,243, previously published as PCT/JP2019/047253, filed on Dec. 3, 2019.
Claims priority of application No. 2018-230199 (JP), filed on Dec. 7, 2018.
Prior Publication US 2022/0345734 A1, Oct. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/109 (2014.01); H04N 19/139 (2014.01); H04N 19/172 (2014.01); H04N 19/44 (2014.01); H04N 19/52 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/105 (2014.11); H04N 19/109 (2014.11); H04N 19/139 (2014.11); H04N 19/172 (2014.11); H04N 19/52 (2014.11); H04N 19/70 (2014.11)] 1 Claim
OG exemplary drawing
 
1. A video decoding apparatus comprising,
a parameter decoding circuit configured to decode parameters for generating a prediction image in an MMVD mode; and
an MMVD prediction circuit configured to obtain a motion vector by adding a vector difference to a motion vector for merging,
wherein the parameter decoding circuit decodes a first syntax element indicating an index of a merge candidate list, a second syntax element indicating a length of the vector difference, and a third syntax element indicating a direction of the vector difference,
the MMVD prediction circuit
derives the motion vector for merging from the first syntax element,
derives a first vector from the second syntax element and the third syntax element, and
in a case that a distance between a target picture and a L0 picture is equal to a distance between the target picture and a L1 picture, derives the vector difference by scaling the first vector.