US 12,273,564 B2
Method and device for processing video signal by using subblock-based motion compensation
Geonjung Ko, Seoul (KR); Dongcheol Kim, Suwon-Si (KR); Juhyung Son, Uiwang-Si (KR); Jaehong Jung, Seoul (KR); and Jinsam Kwak, Anyang-Si (KR)
Assigned to WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Seongnam-si (KR)
Filed by WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Seongnam-si Gyeonggi-Do (KR)
Filed on Apr. 19, 2021, as Appl. No. 17/234,688.
Application 17/234,688 is a continuation of application No. PCT/KR2019/014016, filed on Oct. 23, 2019.
Claims priority of application No. 10-2018-0126782 (KR), filed on Oct. 23, 2018; application No. 10-2018-0137704 (KR), filed on Nov. 9, 2018; application No. 10-2019-0000479 (KR), filed on Jan. 2, 2019; and application No. 10-2019-0016537 (KR), filed on Feb. 13, 2019.
Prior Publication US 2021/0243476 A1, Aug. 5, 2021
Int. Cl. H04N 19/70 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/52 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/52 (2014.11)] 9 Claims
OG exemplary drawing
 
1. A method of processing a video signal, the method comprising:
acquiring a first syntax element indicating whether a subblock-based merge mode is applied to a current block;
when the first syntax element indicates that the subblock-based merge mode is not applied to the current block, acquiring a second syntax element indicating whether a merge mode using a motion vector difference is applied to the current block;
when the second syntax element indicates that the merge mode using the motion vector difference is applied to the current block, acquiring a third syntax element indicating a candidate used for inter prediction of the current block among candidates included in a merge candidate list of the current block, acquiring information related to the motion vector difference, inducing a motion vector of the current block by adding the motion vector difference to a motion vector of the candidate indicated by the third syntax element;
when the first syntax element indicates that the subblock-based merge mode is applied to the current block, inducing the motion vector of the current block without parsing the second syntax element; and
generating a predicted block of the current block using the motion vector of the current block.