IMAGE CODING DEVICE, IMAGE CODING METHOD, IMAGE DECODING DEVICE, IMAGE DECODING METHOD AND 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. Image coding device is proposed, including: a block dividing module with the ability to divide an input image into a plurality of blocks, prediction module with a capability to perform prediction based on coded pixels in order to generate prediction errors, a transformation module with the ability to perform orthogonal transformation for prediction errors, in order to generate transform coefficients, a quantization matrix generation module with the ability to generate quantization matrices, which are used to quantize the transform coefficients, quantization matrix coding module with the ability to calculate difference values by scanning the quantization matrices and encode difference values, quantization module with the ability to generate quantization coefficients by quantizing the generated transform coefficients using quantization matrices and a coefficient coding module with the ability to encode the quantization coefficients, wherein the quantization matrix encoding module is configured to scan the coefficients of the quantization matrices in a unidirectional manner to calculate the difference value.

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

17 cl, 40 dwg