US 12,439,054 B2
Image encoding/decoding method and device
Bae Keun Lee, Seongnam-si (KR); and Dong San Jun, Changwon-si (KR)
Assigned to INTELLECTUAL DISCOVERY CO., LTD., Seoul (KR)
Filed by Dolby International AB, Amsterdam Zuidoost (NL)
Filed on Sep. 27, 2023, as Appl. No. 18/476,044.
Application 18/476,044 is a continuation of application No. 17/418,540, granted, now 11,812,031, previously published as PCT/KR2019/018644, filed on Dec. 27, 2019.
Claims priority of application No. 10-2018-0171321 (KR), filed on Dec. 27, 2018.
Prior Publication US 2024/0022730 A1, Jan. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 7/12 (2006.01); H04N 19/139 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/513 (2014.01)
CPC H04N 19/139 (2014.11) [H04N 19/176 (2014.11); H04N 19/46 (2014.11); H04N 19/513 (2014.11)] 6 Claims
OG exemplary drawing
 
1. A decoding method of an image, the method comprising:
deriving motion information of a current block based on a merge index and a merge candidate list of the current block, wherein the motion information includes at least one of a motion vector or a reference picture index, and wherein the merge candidate list includes at least one merge candidate; and
performing inter prediction of the current block based on the motion information of the current block,
wherein a maximum number of merge candidates available for the current block is adaptively determined based on a first flag indicating whether to use a motion vector difference value for inter prediction of the current block,
wherein the motion vector of the current block is modified with the motion vector difference value based on the first flag indicating that the motion vector difference value is used for the inter prediction of the current block,
wherein the motion vector difference value is derived based on a merge offset vector,
wherein the merge offset vector is determined based on a length candidate and a direction candidate,
wherein the length candidate is determined based on a first index specifying one of a plurality of length candidates, and the direction candidate is determined based on a second index specifying one of a plurality of direction candidates,
wherein a range of the length candidates is determined differently based on a second flag indicating whether only integer sample precision is used, and
wherein the second flag equal to a first value indicates that only the integer sample precision is used, and the second flag equal to a second value indicates that either fractional or integer sample precision is used.