US 12,262,050 B2
Intra prediction for video encoding and decoding
Gagan Rath, Bretagne (FR); Fabrice Urban, Thorigne Fouillard (FR); Fabrice Le Leannec, Betton (FR); and Fabien Racape, San Francisco, CA (US)
Assigned to InterDigital CE Patent Holdings, SAS, Paris (FR)
Appl. No. 17/619,446
Filed by InterDigital CE Patent Holdings, SAS, Cesson-Sevigne (FR)
PCT Filed Jun. 22, 2020, PCT No. PCT/EP2020/067318
§ 371(c)(1), (2) Date Dec. 15, 2021,
PCT Pub. No. WO2020/260188, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 19305824 (EP), filed on Jun. 24, 2019.
Prior Publication US 2022/0312034 A1, Sep. 29, 2022
Int. Cl. H04N 19/593 (2014.01); H04N 19/105 (2014.01); H04N 19/11 (2014.01); H04N 19/59 (2014.01)
CPC H04N 19/593 (2014.11) [H04N 19/105 (2014.11); H04N 19/11 (2014.11); H04N 19/59 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
determining a value associated with a prediction of a pixel of a block of picture information, the block of picture information having a top and a left, wherein the prediction is based on an intra-prediction along a non-diagonal direction,
determining, from among a plurality of decoded pixels neighboring the block on the top and the left, at least four reference samples for the block based on the non-diagonal direction, wherein the determining of the value comprises an interpolation based on a quadratic model and the at least four reference samples, the quadratic model comprising a linear portion and a quadratic portion, and the quadratic portion being based on a piecewise linear approximation; and
decoding at least a portion of the picture information based on the value.