Patent ID: 6507613
Filing Date: 2003-01-14
Classification: H03H

Abstract:
A digital filter adapted to transform an input digital signal into first and second output digital signal, includes:an input to receive the input digital signal including input samples (xi); a first output to output the digital signal including output samples (y2i+1) of odd ranking, each output sample of odd ranking being equal to the input sample (x2i) of the same ranking decreased by the approximate value of a sum of input samples of even ranking respectively multiplied by first filtering coefficients (pk); and a second output to output the digital signal including output samples (y2i) of even ranking, each output sample of even ranking being equal to the input sample (x2i) of the same ranking decreased by the approximate value of a sum of output samples of odd ranking respectively multiply by second filtering coefficients (uk); wherein the second filtering coefficients (uk) are chosen from all the following sets of coefficients: (5/16, 5/16), (âˆ’1/16, 5/16, 5/16, âˆ’1/16), and (1/256, âˆ’15/256, 78/256, 78/256, âˆ’15/256, 1/256).