IMAGE PROCESSING DEVICE AND METHOD Russian patent published in 2020 - IPC H04N19/124 H04N19/60 

FIELD: computer equipment.

SUBSTANCE: image processing device comprises an encoded data decoding unit for generating quantized data; an inverse differential pulse-code modulation module for setting a DC coefficient; a matrix size conversion module for step-up conversion of 8×8 quantisation matrix into 16×16 quantisation matrix by executing a "next-nearest" interpolation process with respect to the matrix elements of 8×8 quantisation matrix; a coefficient replacement unit (0,0) located at beginning of 16×16 quantisation matrix, a DC coefficient; and a unit for dequantization quantized data obtained by decoding the encoded data using 16×16 quantisation matrix, in which coefficient (0,0), located at the beginning, has been replaced by constant current coefficient by replacement module or using default quantisation matrix 16×16.

EFFECT: technical result consists in improvement of efficiency of quantisation/ dequantization.

10 cl, 59 dwg