US 12,301,818 B2
Context-based binary arithmetic encoding and decoding
Fabrice Leleannec, Mouaze (FR); Tangi Poirier, Thorigne-Fouillard (FR); Ya Chen, Rennes (FR); and Edouard Francois, Bourg des Comptes (FR)
Assigned to InterDigital VC Holdings, Inc., Wilmington, DE (US)
Appl. No. 17/255,746
Filed by InterDigital VC Holdings, Inc., Wilmington, DE (US)
PCT Filed May 30, 2019, PCT No. PCT/US2019/034498
§ 371(c)(1), (2) Date Dec. 23, 2020,
PCT Pub. No. WO2020/009758, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. 18305854 (EP), filed on Jul. 2, 2018.
Prior Publication US 2021/0274182 A1, Sep. 2, 2021
Int. Cl. H04N 19/13 (2014.01); H04N 19/103 (2014.01); H04N 19/119 (2014.01); H04N 19/157 (2014.01); H04N 19/25 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/103 (2014.11); H04N 19/119 (2014.11); H04N 19/157 (2014.11); H04N 19/25 (2014.11); H04N 19/44 (2014.11)] 15 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining a data set representing a current block of a picture; and
decoding the data set, the decoding comprising:
obtaining a value representative of a current quantization applied to transform coefficients of the current block;
determining which at least one block level Context Adaptive Binary Arithmetic Coding (CABAC) context of a plurality of block level CABAC contexts adapted on previous blocks of the picture to apply on binary data of the data set for decoding a significance flag of a transform coefficient of the current block from the obtained data set based on a context increment value, the context increment value being determined from the value representative of the current quantization; and
CABAC decoding the significance flag with the at least one determined context.