IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE DECODING METHOD AND DATA STORAGE MEDIUM Russian patent published in 2020 - IPC H04N19/129 H04N19/196 

FIELD: physics.

SUBSTANCE: invention relates to the image encoding and decoding. Disclosed is an image encoding device, comprising: a unit for dividing blocks to divide an input image into a plurality of blocks, prediction module to perform prediction based on encoded pixels and generate prediction errors, conversion module to perform orthogonal transformation for prediction errors and generate conversion coefficients, module for generating quantisation matrices to generate quantisation matrices, which are used to quantize conversion coefficients, module for encoding quantisation matrices to calculate values of differences by scanning quantisation matrices and encode values of differences, a quantisation module to form quantisation coefficients by quantisation of formed transformation coefficients using quantisation matrices, and coefficients encoding module, in order to encode quantisation coefficients, wherein the quantisation matrix encoding module is configured to scan coefficients of quantisation matrices by a unidirectional method in order to calculate the difference value.

EFFECT: technical result is to provide highly efficient coding of quantization matrices.

15 cl, 40 dwg