METHOD AND DEVICE FOR CODING OR DECODING PIXEL UNITS Russian patent published in 2018 - IPC H04N19/463 

FIELD: physics.

SUBSTANCE: method for processing the current pixel block of the image uses a pallet prediction mode that uses the current palette to compose an index predictor block to predict the current pixel block. The current palette contains entries that associate indexes of records with the pixel values. The current palette is predicted from the records of two or more palettes, which are the palettes previously used for processing the pixel blocks. The palette predictor is used, which is composed of the palette used for processing the pixels for the coding unit in the current coding object and the previously used palette, for which the flag bitmap indicates, whether its elements are copied or not to the palette used in the past.

EFFECT: reducing the cost of transmitting the service information by reducing the amount of information transmitted relative to the palette from the encoder to the decoder.

13 cl, 28 dwg