FIELD: information technology.
SUBSTANCE: video decoding device includes a processor that is configured to obtain from the information bitstream on a method of determining a group of pixels to be compensated, and when the above information is obtained, obtaining a compensation value from the bitstream; when a group of pixels to be compensated according to the bands is determined on the basis of information on the method of determining a group of pixels to be compensated, applying the compensation value to the pixel corresponding to the band among the pixels of the current block; and when a group of pixels to be compensated according to the boundary value levels is determined on the basis of the method of determining the group of pixels to be compensated, applying the compensation value to the pixel corresponding to the boundary value level among the pixels of the current block, the band is one of bands plurality. A plurality of bands is generated by dividing a common range of pixel values of one or more pixels in the current block.
EFFECT: improved image quality.
22 dwg, 2 tbl
