US 12,407,821 B2
Improving the angle discretization in decoder side intra mode derivation
Thierry Dumas, Rennes (FR); Fabrice Le Leannec, Betton (FR); Franck Galpin, Thorigne-Fouillard (FR); and Philippe Bordes, Laille (FR)
Assigned to INTERDIGITAL CE PATENT HOLDINGS, SAS, Paris (FR)
Appl. No. 18/691,191
Filed by INTERDIGITAL CE PATENT HOLDINGS, SAS, Paris (FR)
PCT Filed Sep. 16, 2022, PCT No. PCT/EP2022/075843
§ 371(c)(1), (2) Date Mar. 12, 2024,
PCT Pub. No. WO2023/052156, PCT Pub. Date Apr. 6, 2023.
Claims priority of application No. 21306345 (EP), filed on Sep. 28, 2021.
Prior Publication US 2024/0380885 A1, Nov. 14, 2024
Int. Cl. H04N 19/11 (2014.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/11 (2014.11) [H04N 19/105 (2014.11); H04N 19/176 (2014.11); H04N 19/593 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
determining one or more gradients for available reference pixels surrounding a current video block;
determining an intra prediction mode to use for encoding the current video block based on said gradients; and,
encoding the current video block using the determined intra prediction mode, wherein when horizontal and vertical gradients are equal magnitude and same sign the intra prediction mode is 34, and when horizontal and vertical gradients are equal magnitude and opposite sign, the intra prediction mode is 66.