METHOD AND DEVICE FOR IMAGE ENCODING AND DECODING Russian patent published in 2023 - IPC H04N19/119 H04N19/167 H04N19/186 

FIELD: image encoding/decoding.

SUBSTANCE: invention relates to means for image encoding and decoding. A position on an image of a given count position in a chromaticity block is determined. A jointly located brightness block is determined, which is a brightness block containing brightness count jointly located with the position in the chromaticity block. The use of a tool for scaling chromaticity residues is determined. If the tool for scaling chromaticity residues is activated, scaling of a residue of the chromaticity block is used according to a scaling coefficient, where the scaling coefficient for the tool for scaling chromaticity residues is determined based on one or several restored brightness counts, which belong to a lower row and/or a right column of brightness counts, which, respectively, belong to upper and left neighboring permitted rectangular areas of permitted rectangular areas containing the current chromaticity block. The specified chromaticity block is decoded.

EFFECT: increase in the efficiency of image encoding.

10 cl, 42 dwg