DEBLOCKING FILTRATION Russian patent published in 2015 - IPC H04N19/86 

FIELD: information technologies.

SUBSTANCE: to reduce blocking artefacts at the border (1) of units between a unit (10) of multiple pixels (11, 13, 15, 17) and an adjacent unit (20) of multiple pixels (21, 23, 25, 27), in a video frame blocking artefacts at the border of the blocks are suppressed by means of calculation of displacement on the basis of pixel values of pixels (11, 13) on the line (12) of pixels (11, 13, 15, 17) in the unit (10) and on the basis of pixel values of pixels (21, 23) on the appropriate line (22) of pixels (21, 23, 25, 27) in the adjacent unit (20). Displacement is added to the pixel value of the pixel (11) that is closer to the border (1) of the units on the line (12) of pixels (11, 13, 15, 17) and is subtracted from the pixel value of the pixel (21) that is closer to the border (1) of the units on the appropriate line (22) of pixels (21, 23, 25, 27).

EFFECT: provision of effective suppression of blocking artefacts and improved low-frequency characteristics of filtration.

24 cl, 15 dwg