US 12,355,970 B2
Method and device for picture encoding and decoding using position dependent intra prediction combination
Gagan Rath, Rennes (FR); Fabien Racape, San Francisco, CA (US); and Fabrice Urban, Thorigne Fouillard (FR)
Assigned to InterDigital CE Patent Holdings, SAS, Paris (FR)
Filed by INTERDIGITAL CE PATENT HOLDINGS, SAS, Paris (FR)
Filed on Mar. 26, 2024, as Appl. No. 18/617,160.
Application 18/617,160 is a continuation of application No. 17/619,047, granted, now 11,991,361, previously published as PCT/EP2020/066522, filed on Jun. 15, 2020.
Claims priority of application No. 19305798 (EP), filed on Jun. 20, 2019.
Prior Publication US 2024/0244215 A1, Jul. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/132 (2014.01); H04N 19/105 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/105 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] 17 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining a predicted value Ppred(x,y) for a sample of a block of an image, the predicted value being intra predicted according to a value representative of an intra prediction angle; and
determining a sample value P(x,y), such that:
for an intra prediction angle corresponding to a vertical direction: P(x,y)=Ppred(x,y)+((((Pleft−Ppred(x,y))<<log 2(wL))+32)>>6), and
for an intra prediction angle corresponding to a horizontal direction: P(x,y)=Ppred(x,y)+((((Ptop−Ppred(x,y))<<log 2(wT))+32)>>6),
where, Pleft is determined based on the value of a left reference sample, Ptop is determined based on the value of a top reference sample, and wL and wT are weightings.