Patent ID: 7324025

Claim:
A non-integer interpolation filter for interpolating an input value, comprising: an N-th order differentiator for differentiating the input value in an input sample domain at an input sample rate and for generating a difference of the input value at the output of said N-th order differentiator; a multiplier network formed of multiplier stages and being coupled to the output of said N-th order differentiator for combining the output of said N-th order differentiator with corresponding coefficients and for generating output values in the input sample domain; an N-th order integrator formed of integrator stages in which each of said integrator stages is associated to only a corresponding single coefficient of said corresponding coefficients through only a respective one of said multiplier stages for integrating the same and for generating an interpolated output value at an output sample rate in which the output sample rate has a non-integer factor with respect to the input sample rate; and said N-th order being greater than a first order.