IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE AND IMAGE ENCODING AND DECODING DEVICE Russian patent published in 2019 - IPC H04N19/91 H04N19/176 

FIELD: image processing means.

SUBSTANCE: invention relates to encoding and decoding of images. Image decoding method is disclosed, comprising: performing arithmetic decoding of the first flag, which indicates whether the absolute value of the target coefficient in the block of the target coefficients is greater than 1; performing arithmetic decoding of the second flag, which indicates whether said absolute value is greater than 2; generating coefficients in a block of target coefficients using the decoded first flag and the decoded second flag; performing inverse quantization of the coefficients generated using the decoded first flag and the decoded second flag to obtain residual data; and generating the reconstructed image block using the residual data and the predicted image block.

EFFECT: technical result is an image decoding method which is capable of reducing the amount of processing while suppressing a deterioration in coding efficiency.

18 cl, 64 dwg