FIELD: information technology.
SUBSTANCE: method comprises the following steps: matrix of offset coefficients is generated by adding one or more offset values to the coefficient of the matrix of initial coefficients. A matrix of transformed coefficients is generated using fixed-point arithmetic for repeated application of one-dimensional transformation to coefficients in the matrix of offset coefficients. A matrix of output coefficients is generated via right-side shifting of coefficients in the matrix of transformed coefficients, where coefficients in the matrix of output coefficients are approximations of values which could have been obtained by transforming the matrix of initial coefficients using an ideal inverse discrete cosine transform. The media presentation unit is instructed to output audible or visible signals based on the matrix of output values.
EFFECT: reduced round-off errors when calculating discrete cosine transform using fixed-point calculations.
83 cl, 12 dwg
