FIELD: information technologies.
SUBSTANCE: vector of coefficients of reverse discrete cosine conversion is calculated using a sequence of butterfly-type structure operations above fixed-point numbers. Values of centre shift and a value of additional displacement are added to a coefficient of a matrix of scaled coefficients. Reverse discrete cosine conversion is applied to a resulting matrix of scaled coefficients. Values in a resulting matrix are shifted to the right for produce a matrix of pixel component values.
EFFECT: reduction of errors in process of compression and recovery of images and video information.
57 cl, 12 dwg
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