IMAGE ENCODING DEVICE, AN IMAGE ENCODING METHOD, AN IMAGE DECODING DEVICE, AN IMAGE DECODING METHOD AND A DATA STORAGE MEDIUM Russian patent published in 2019 - IPC H04N19/129 H04N19/196 

FIELD: data processing.

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, a prediction module configured to perform prediction based on the encoded pixels to generate prediction errors, a conversion module configured to perform orthogonal transformation for prediction errors to generate conversion coefficients, a quantization matrix generation module configured to generate quantization matrices which are used to quantize conversion coefficients, quantization matrix coding module with the ability to calculate difference values by scanning the quantization matrices and encode difference values, quantization module with possibility of forming quantization coefficients by quantization of formed transformation coefficients using quantization matrices, and a coefficient encoding module with the possibility of encoding quantization coefficients, wherein the quantization matrix encoding module is configured to scan quantization matrix coefficients using a unidirectional method in order to calculate the difference value.

EFFECT: high-efficiency encoding of quantization matrices.

17 cl, 40 dwg