METHOD AND DEVICE OF COLOUR IMAGE CODING/DECODING USING CHROMA SIGNAL COMPONENTS CORRELATION Russian patent published in 2008 - IPC H04N9/64 H04N7/30 H04N11/06 

FIELD: physics.

SUBSTANCE: invention concerns image processing technology, particularly YCbCr-format colour image data coding/decoding to smaller data volume by finding correlation between Cb and Cr chroma signal components of colour image data. The invention claims colour image coding method involving stages of: chroma signal component conversion in each of two or more mutual prediction modes; cost calculation for conversion values in each of two or more mutual prediction modes with the help of cost function defined preliminarily; selection of one or more mutual prediction modes on the basis of calculation result and conversion value output for the selected mutual prediction mode; entropic coding of output conversion values, where preliminarily defined cost function is selected out of cost function defining distortion in dependence of transfer rate, function of absolute subtract value amount, function of absolute converted subtract, function of square subtract sum and function of average absolute subtract.

EFFECT: increased efficiency of image coding.

88 cl, 23 dwg