US 12,355,942 B2
Adapting the transform process to neural network-based intra prediction mode
Thierry Dumas, Rennes (FR); Franck Galpin, Thorigne-Fouillard (FR); Philippe Bordes, Laille (FR); and Fabrice Le Leannec, Betton (FR)
Assigned to InterDigital CE Patent Holdings, SAS, Paris (FR)
Appl. No. 18/011,184
Filed by INTERDIGITAL CE PATENT HOLDINGS, SAS, Paris (FR)
PCT Filed Jun. 8, 2021, PCT No. PCT/EP2021/065209
§ 371(c)(1), (2) Date Dec. 18, 2022,
PCT Pub. No. WO2021/254812, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 20305668 (EP), filed on Jun. 18, 2020; application No. 20306137 (EP), filed on Sep. 30, 2020; and application No. 21305378 (EP), filed on Mar. 26, 2021.
Prior Publication US 2023/0224454 A1, Jul. 13, 2023
Int. Cl. H04N 19/105 (2014.01); H04N 19/12 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/12 (2014.11); H04N 19/176 (2014.11); H04N 19/593 (2014.11)] 24 Claims
OG exemplary drawing
 
1. A method comprising:
determining an intra prediction of an image block and a vector by applying at least one neural network to a context comprising pixels adjacent to the image block, wherein an ith element of the vector indicates a relative relevance that a respective group of transforms corresponding to an index i includes a transform that is applied to the image block and wherein the index i identifies the respective group of transforms from among a plurality of groups of transforms;
inferring an index corresponding to a higher relative relevance of the vector, wherein the index identifies a particular group of transforms from among a plurality of groups of transforms;
obtaining a block of residue for the image block by at least applying an inverse transform to transform coefficients of the image block, the inverse transform belonging to the particular group of transforms identified by the index; and
decoding the image block based on the intra prediction and the block of residue.