FIELD: information technology.;SUBSTANCE: in one version, the device for performing data transformation has a first logic circuit for multiplying a first group from at least one data value by a first group, at least from one rational binary constant which approximates a first group from at least one irrational constant scaled by a first common factor, wherein each rational binary constant is a rational number with a binary denominator; and a second logic circuit for multiplying a second group from at least one data value by a second group from at least one rational binary constant which approximates a second group from at least one irrational constant scaled by a second common factor, wherein the first and second groups from at least one data value have different sizes.;EFFECT: reduced complexity and high accuracy of transformation.;43 cl, 9 dwg, 6 tbl
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