DECODING IMAGE DEVICE, METHOD FOR DECODING IMAGES AND LONG-TERM COMPUTER READABLE RECORD MEDIUM Russian patent published in 2019 - IPC H04N19/91 H04N19/593 H04N19/176 

FIELD: data processing.

SUBSTANCE: invention relates to decoding images. An image decoding device that decodes the bitstream obtained by separating the difference information between the image being the decoding object, and the image that is the object of the prediction, on the set of subblocks and encoding the divided subblocks in the specified order, contains: block for decoding information on a significant subblock indicating the 0 equality of all or not all values of the difference coefficients related to the subblock being the object of decoding; block for decoding information about a significant difference coefficient indicating the equality or inequality 0 of the value of the difference coefficient; decoding unit of the value of the difference coefficient and a context extraction unit, which extracts the context for decoding the information about the significant difference coefficient that is the object of decoding, based on the sum of the horizontal position and the vertical position of the difference coefficient in the subunit that is the object of decoding and at least one of: (1) information on the relevant sub-block of the decoded sub-blocks adjacent to the sub-block being the decoding object, (2) information on significant difference coefficients related to decoded subunits adjacent to the subunit being the decoding object, and (3) values of difference coefficients related to decoded subunits adjacent to the subunit being the decoding object.

EFFECT: increase the efficiency of image decoding.

3 cl, 20 dwg