US 11,917,157 B2
Image encoding/decoding method and device for performing PROF, and method for transmitting bitstream
Nae Ri Park, Seoul (KR); Jung Hak Nam, Seoul (KR); and Hyeong Moon Jang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Oct. 20, 2022, as Appl. No. 17/970,124.
Application 17/970,124 is a continuation of application No. 17/696,619, filed on Mar. 16, 2022, granted, now 11,516,475.
Application 17/696,619 is a continuation of application No. PCT/KR2020/012245, filed on Sep. 10, 2020.
Claims priority of provisional application 62/909,153, filed on Oct. 1, 2019.
Claims priority of provisional application 62/902,954, filed on Sep. 19, 2019.
Prior Publication US 2023/0089062 A1, Mar. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/132 (2014.01); H04N 19/105 (2014.01); H04N 19/137 (2014.01); H04N 19/176 (2014.01); H04N 19/513 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/105 (2014.11); H04N 19/137 (2014.11); H04N 19/176 (2014.11); H04N 19/513 (2014.11)] 14 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
deriving a prediction sample of a current block based on motion information of the current block;
deriving a reference picture resampling (RPR) condition for the current block;
determining whether prediction refinement with optical flow (PROF) applies to the current block based on the RPR condition; and
deriving a refined prediction sample for the current block by applying PROF to the current block,
wherein the RPR condition is derived based on a width of the reference picture of the current block being different from that of the current picture or a height of the reference picture of the current block being different from that of the current picture.