US 12,439,031 B2
Encoder, decoder, encoding method, and decoding method
Kiyofumi Abe, Osaka (JP); Takahiro Nishi, Nara (JP); Tadamasa Toma, Osaka (JP); and Ryuichi Kanoh, Osaka (JP)
Assigned to Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed on Oct. 18, 2023, as Appl. No. 18/489,678.
Application 18/489,678 is a continuation of application No. 17/374,085, filed on Jul. 13, 2021, granted, now 11,831,864.
Application 17/374,085 is a continuation of application No. 16/901,869, filed on Jun. 15, 2020, granted, now 11,115,654, issued on Sep. 7, 2021.
Application 16/901,869 is a continuation of application No. 16/702,254, filed on Dec. 3, 2019, granted, now 10,728,543, issued on Jul. 28, 2020.
Application 16/702,254 is a continuation of application No. PCT/JP2018/020659, filed on May 30, 2018.
Claims priority of provisional application 62/515,208, filed on Jun. 5, 2017.
Prior Publication US 2024/0048691 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/119 (2014.01); H04N 19/139 (2014.01); H04N 19/14 (2014.01); H04N 19/176 (2014.01); H04N 19/52 (2014.01); H04N 19/573 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/119 (2014.11); H04N 19/139 (2014.11); H04N 19/14 (2014.11); H04N 19/176 (2014.11); H04N 19/52 (2014.11); H04N 19/573 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A decoder comprising:
circuitry; and
memory,
wherein, using the memory, the circuitry:
in a first operating mode,
derives first motion vectors for a first block obtained by splitting a picture, using a first inter prediction scheme, and
generates a prediction image corresponding to the first block, by referring to spatial gradients of luminance generated based on the first motion vectors; and
in a second operating mode,
derives second motion vectors for a sub-block obtained by splitting a second block, using a second inter prediction scheme different from the first inter prediction scheme, the second block being obtained by splitting the picture, and
generates a prediction image corresponding to the sub-block without referring to spatial gradients of luminance.