FIELD: information technology.
SUBSTANCE: video decoding method supports an algorithm of precise scalability on quality (FGS). The method involves: obtaining a predicted image for the current frame, using a motion vector, evaluated with a predetermined accuracy, quantisation of the difference between the current frame and the predicted image, inverse quantisation of the difference and formation of a reconstructed image of the current frame, compensation of motion on the reference frame of the FGS level and on the reference frame of the main level, using an estimated motion vector, calculation of the difference between the FGS level reference frame with compensated motion and the reference frame of the main level with compensated motion, subtraction of the reconstructed image from the current frame and the calculated remainder from the current frame and coding of the subtraction result.
EFFECT: reduced volume of calculations, required for a multi-level algorithm of progressive precise scalability on quality (PFGS).
49 cl, 12 dwg
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