US 11,917,150 B2
Encoder, decoder, encoding method, and decoding method
Kiyofumi Abe, Osaka (JP); Takahiro Nishi, Nara (JP); Tadamasa Toma, Osaka (JP); Ryuichi Kanoh, Osaka (JP); Chong Soon Lim, Singapore (SG); Ru Ling Liao, Singapore (SG); Hai Wei Sun, Singapore (SG); Sughosh Pavan Shashidhar, Singapore (SG); Han Boon Teo, Singapore (SG); and Jing Ya Li, Singapore (SG)
Assigned to Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed on Apr. 25, 2022, as Appl. No. 17/728,284.
Application 17/728,284 is a continuation of application No. 17/727,194, filed on Apr. 22, 2022.
Application 17/727,194 is a continuation of application No. 17/726,133, filed on Apr. 21, 2022.
Application 17/726,133 is a continuation of application No. 17/725,106, filed on Apr. 20, 2022.
Application 17/725,106 is a continuation of application No. 17/724,178, filed on Apr. 19, 2022.
Application 17/724,178 is a continuation of application No. 16/942,630, filed on Jul. 29, 2020, granted, now 11,350,092.
Application 16/942,630 is a continuation of application No. PCT/JP2019/003065, filed on Jan. 30, 2019.
Claims priority of provisional application 62/623,834, filed on Jan. 30, 2018.
Prior Publication US 2022/0248016 A1, Aug. 4, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/119 (2014.01); H04N 19/176 (2014.01); H04N 19/137 (2014.01); H04N 19/52 (2014.01)
CPC H04N 19/119 (2014.11) [H04N 19/137 (2014.11); H04N 19/176 (2014.11); H04N 19/52 (2014.11)] 1 Claim
OG exemplary drawing
 
1. A non-transitory computer readable medium storing a bitstream, the bitstream including information according to which a decoder determines to perform first inter prediction or second inter prediction, the first inter prediction including a bi-directional optical flow (BIO) process, the second inter prediction including a motion compensation process, the second inter prediction not including the BIO process, wherein
in response to a determination, based on the information, to perform the BIO process,
(i) first prediction images for an image block are obtained;
(ii) gradient images for the first prediction images are obtained; and
(iii) a prediction image for the image block is generated using the first prediction images and the gradient images, and
in response to a determination, based on the information, to perform the motion compensation process,
(i) a plurality of partitions are determined in the image block;
(ii) a second prediction image is obtained for each of the plurality of partitions; and
(iii) a prediction image for the image block is generated using the second prediction images.