IMAGE DECODING DEVICE AND IMAGE DECODING METHOD Russian patent published in 2019 - IPC H04N19/44 H04N19/176 H04N19/196 

FIELD: data processing.

SUBSTANCE: invention relates to encoding and decoding an image using encoding a prediction quantisation parameter. Technical result is achieved by the bitstream decoding in the decoding unit with quantization unit and to be decoded decoding unit with quantization difference parameter quantization and extraction, quantization parameter extraction with prediction, summing up the decoding unit with quantization difference quantization parameter, extraction of a quantisation parameter with prediction using quantisation parameters of two decoding units with quantisation, wherein the average quantisation parameters of said two decoding units with quantisation is given as a prediction quantisation parameter.

EFFECT: technical result consists in improvement of coding efficiency due to reduction of quantization parameter code size.

2 cl, 19 dwg