PICTURE CODING DEVICE, PICTURE CODING METHOD AND PICTURE CODING PROGRAM, AND PICTURE DECODING DEVICE, PICTURE DECODING METHOD AND PICTURE DECODING PROGRAM Russian patent published in 2017 - IPC H04N19/13 H04N19/137 H04N19/176 H04N19/593 

FIELD: physics.

SUBSTANCE: image encoding device separates the difference information between the image being an encoded object and the image being a predicted object into a plurality of sub-blocks and the resulting sub-blocks are encoded in a predetermined order. Contains: a block for encoding information about a significant sub-block indicating the equality or inequality of "0" of all values of the difference coefficients related to a sub-block; a coding block for information about a significant difference coefficient indicating the equality or inequality "0" of the value of the difference coefficient; a difference coefficient value encoding unit and a context extraction unit that extracts the index and the context used to encode the significant difference coefficient information based on this index, and the position of the difference coefficient being an encoded object in the sub-block being the encoded object.

EFFECT: increasing the efficiency of encoding and decoding information about a significant difference coefficient.

6 cl, 25 dwg