US 11,936,871 B2
Method and device for picture encoding and decoding using illumination compensation
Philippe Bordes, Laille (FR); Fabrice Leleannec, Mouazé (FR); Tangi Poirier, Thorigné-Fouillard (FR); and Fabrice Urban, Thorigne Fouillard (FR)
Assigned to INTERDIGITAL MADISON PATENT HOLDINGS, SAS, Paris (FR)
Appl. No. 17/429,077
Filed by INTERDIGITAL MADISON PATENT HOLDINGS, SAS, Paris (FR)
PCT Filed Feb. 3, 2020, PCT No. PCT/US2020/016345
§ 371(c)(1), (2) Date Aug. 6, 2021,
PCT Pub. No. WO2020/163209, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 19305149 (EP), filed on Feb. 8, 2019; and application No. 19305584 (EP), filed on May 7, 2019.
Prior Publication US 2022/0159260 A1, May 19, 2022
Int. Cl. H04N 19/132 (2014.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/196 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/105 (2014.11); H04N 19/176 (2014.11); H04N 19/196 (2014.11)] 14 Claims
OG exemplary drawing
 
1. A method of decoding a block of samples of a picture of a video, the method comprising:
determining, for the block of samples, from a set of neighboring reconstructed samples, a set of N valid samples, N being an integer, wherein a neighboring reconstructed sample is considered as a valid sample on the condition that the sample has not been coded with a mode amongst a set of coding modes and/or with a parameter amongst a set of parameters values, wherein determining the set of N valid samples comprises:
when a block height is greater than or equal to a block width or a number of valid neighboring samples at a left of the block is greater than or equal to a number of valid neighboring samples at a top of the block, first adding all valid neighboring samples at the left of the block in the set of N valid samples and adding valid neighboring samples at the top of the block only to complete the set up to N valid samples; and
when the block height is smaller than the block width or the number of valid neighboring samples at the left of the block is smaller than the number of valid neighboring samples at the top of the block, first adding all valid neighboring samples at the top of the block in the set of N valid samples and adding valid neighboring samples at the left of the block only to complete the set up to N valid samples;
determining local illumination compensation parameters from the determined set of N valid samples and corresponding reference samples in a reference block; and
reconstructing the block from a prediction block obtained by applying local illumination compensation with the determined parameters on the reference block.