IMAGE ENCODING DEVICE, AN IMAGE ENCODING METHOD AND A PROGRAM, AND AN IMAGE DECODING DEVICE, AN IMAGE DECODING METHOD AND A PROGRAM Russian patent published in 2019 - IPC H04N19/124 H04N19/119 H04N19/60 H04N19/176 

FIELD: data processing.

SUBSTANCE: invention relates to encoding/decoding images. Image encoding device comprises: a determination unit for determining a block size for a block included in the image; information coding module, to encode information on the region minimum size related to the quantisation parameter; and an encoding module for encoding a difference value for a quantisation parameter capable of being shared in encoding processes for a group of blocks, including a plurality of blocks; wherein plurality of units includes at least first and second unit; wherein encoding module is configured to encode difference value during first unit processing in case, when the first block contains a coefficient value not equal to 0, and encoding the difference value during processing of the second block in case the second block contains a coefficient value not equal to 0, and the difference value was not encoded when processing the first block.

EFFECT: possibility of controlling image quality during encoding or decoding an image.

29 cl, 32 dwg