US 11,991,373 B2
Method and device for picture encoding and decoding
Edouard Francois, Bourg des Comptes (FR); Fabrice LeLeannec, Mouazé (FR); and Tangi Poirier, Thorigné-Fouillard (FR)
Assigned to InterDigital VC Holdings, Inc., Wilmington, DE (US)
Appl. No. 17/434,152
Filed by InterDigital VC Holdings, Inc., Wilmington, DE (US)
PCT Filed Feb. 25, 2020, PCT No. PCT/US2020/019626
§ 371(c)(1), (2) Date Aug. 26, 2021,
PCT Pub. No. WO2020/176459, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 19305236 (EP), filed on Feb. 28, 2019; application No. 19305281 (EP), filed on Mar. 11, 2019; application No. 19305326 (EP), filed on Mar. 18, 2019; application No. 19305373 (EP), filed on Mar. 25, 2019; application No. 19305465 (EP), filed on Apr. 10, 2019; application No. 19305591 (EP), filed on May 9, 2019; application No. 19305633 (EP), filed on May 17, 2019; application No. 19305684 (EP), filed on May 29, 2019; and application No. 19305904 (EP), filed on Jul. 2, 2019.
Prior Publication US 2023/0300351 A1, Sep. 21, 2023
Int. Cl. H04N 19/186 (2014.01); H04N 19/119 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/186 (2014.11) [H04N 19/119 (2014.11); H04N 19/176 (2014.11)] 16 Claims
OG exemplary drawing
 
1. A method for controlling the use of a chroma residual scaling tool for a chroma block of a picture divided in non-overlapping rectangular areas forming a grid of authorized rectangular areas, the method comprising, in the condition that the chroma block is inside a single chroma authorized rectangular area and the luma block co-located with the chroma block is inside a single luma authorized rectangular area co-located with said chroma authorized rectangular area:
enabling the chroma residual scaling tool, and
determining a scaling factor for the chroma residual scaling tool based on one or more reconstructed luma samples which belong to the bottom line and/or the right column of luma samples which respectively belong to the top and left neighboring authorized rectangular areas of the authorized rectangular areas that contains the current chroma block.