IMAGE DECODING DEVICE AND METHOD FOR DECODING INFORMATION RELATING TO INTRA-FRAME PREDICTION MODE Russian patent published in 2019 - IPC H04N19/593 H04N19/109 H04N19/186 

FIELD: computer equipment.

SUBSTANCE: image decoding device comprises an intra-frame brightness prediction mode decoding unit, which decodes a first syntax element related to the intraframe prediction mode of the brightness signal; block decoding mode intraframe prediction of color difference, which decodes the second syntax element relating to the mode of intraframe prediction of the color difference of the color difference signal; intraframe prediction unit of brightness signal and intraframe prediction unit of the color difference signal, wherein, when aspect ratios of pixels of the brightness signal and the color difference signal are different, unit for decoding intraframe color-difference prediction mode extracts a second intraframe color-difference prediction mode based on the conversion table, in which the mode of intraframe prediction of the angle prediction direction is specified as the second mode of intra-frame prediction of color saturation used at different aspect ratios.

EFFECT: technical result consists in efficient decoding of an image signal as a result of intra-frame prediction in accordance with a color-difference format.

2 cl, 35 dwg