1. A method of obtaining approximated integer cosine transform coefficients, in particular for coding pixel blocks, the transform coefficients being selected as follows: a limited value range is defined for the transform coefficients, the coefficients of the base vectors for the submatrices are selected, taking into account the orthogonality condition, so that the sum of their squares yields the square of the constant component coefficient, the coefficients of the variable components are derived from these coefficients.