ENCODER, DECODER AND CORRESPONDING METHODS FOR PERFORMING CHROMA DEBLOCKING FOR BLOCKS USING COMBINED CHROMA CODING Russian patent published in 2024 - IPC H04N19/117 H04N19/176 

FIELD: physics.

SUBSTANCE: invention relates to a deblocking method for deblocking an edge of a chroma block between a first chroma block of a first image block and the second chromaticity unit of the second image unit when encoding the image and/or decoding the image, wherein the de-blocking method comprises: performing a decision process with respect to an edge of a chroma block, wherein the decision process comprises: determining a first chroma quantization parameter (Qp_Cp) for the first chroma block based on the first luminance quantization parameter (Qp_YP) of the first luminance block of the first image block and chroma QP reference tables for the first chroma unit; determining a second chrominance quantization parameter (Qp_Cq) for a second chroma block based on the second parameter (Qp_YQ) luma quantization of the second luma block of the second image block and the chroma QP reference table for the second chroma block; determining an average and rounded chroma quantization parameter (Qp_C) based on a first chroma quantization parameter (Qp_Cp) and a second chroma quantization parameter (Qp_Cq); and determining the threshold parameter (t_C) based on the averaged and rounded chromaticity quantization parameter (Qp_C); and performing a filtering process on the edge of the chroma block based on the threshold parameter (t_C).

EFFECT: implementation of the purpose is provided.

31 cl, 20 dwg