US 12,137,229 B2
Image encoding/decoding method and device, and recording medium storing bitstream
Ha Hyun Lee, Seoul (KR); Jung Won Kang, Daejeon (KR); Sung Chang Lim, Daejeon (KR); Jin Ho Lee, Daejeon (KR); and Hui Yong Kim, Daejeon (KR)
Assigned to Electronics and Telecommunications Research Institute, Daejeon (KR)
Filed by Electronics and Telecommunications Research Institute, Daejeon (KR)
Filed on Nov. 1, 2023, as Appl. No. 18/499,795.
Application 18/499,795 is a continuation of application No. 17/994,261, filed on Nov. 25, 2022, granted, now 11,871,001.
Application 17/994,261 is a continuation of application No. 17/277,664, granted, now 11,546,605, issued on Jan. 3, 2023, previously published as PCT/KR2019/012277, filed on Sep. 20, 2019.
Claims priority of application No. 10-2018-0113033 (KR), filed on Sep. 20, 2018; application No. 10-2018-0115917 (KR), filed on Sep. 28, 2018; application No. 10-2018-0119528 (KR), filed on Oct. 8, 2018; application No. 10-2018-0169000 (KR), filed on Dec. 26, 2018; application No. 10-2019-0000555 (KR), filed on Jan. 3, 2019; and application No. 10-2019-0069693 (KR), filed on Jun. 13, 2019.
Prior Publication US 2024/0107025 A1, Mar. 28, 2024
Int. Cl. H04N 19/139 (2014.01); H04N 19/159 (2014.01); H04N 19/167 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/139 (2014.11) [H04N 19/159 (2014.11); H04N 19/167 (2014.11); H04N 19/176 (2014.11); H04N 19/593 (2014.11)] 12 Claims
OG exemplary drawing
 
1. A method of decoding an image, the method comprising:
deriving a temporal motion vector of a current block;
determining, based on the temporal motion vector of the current block, a position of a co-located block within a co-located picture; and
determining a representative motion information corresponding to a central position of the current block based on motion information of the co-located block, the representative motion information comprising a representative motion vector and a representative list utilization flag,
wherein, based on an availability of the motion information of the co-located block, an availability of whether a motion vector of the current block is derived in units of sub-blocks is determined,
wherein, in response to deriving the motion vector of the current block in units of sub-blocks being available, a sub-block motion vector of the sub-block included in the current block is derived based on a co-located sub-block corresponding to the sub-block, and
wherein, in response to motion information of the co-located sub-block corresponding to the sub-block being unavailable, the sub-block motion vector of the sub-block is determined as the representative motion vector.