Patent ID: 6718354
Filing Date: 2004-04-06
Classification: G06F,H03H

Abstract:
A method for digitally filtering an input signal, the method comprising:receiving samples of the input signal, corresponding to a first sample rate, from an analog-to-digital conversion device; adding a first sample and second sample of said samples to generate a first intermediate value; subtracting the first sample and the second sample to generate a second intermediate value; multiplying the first intermediate value by a first coefficient to generate a first resultant value; multiplying the second intermediate value by a second coefficient to a generate a second resultant value; generating a first sum including the first resultant value; generating a second sum including the second resultant value; adding the first sum and the second sum to generate a first output value; subtracting the first sum and the second sum to generate a second output value; multiplying the first intermediate value by a third coefficient to generate a third resultant value; generating a third output value using the third resultant value; and storing the first output value, the second output value and the third output value to a destination buffer in a memory; wherein the first output value, the second output value and the third output value are representative of the input signal at a second sample rate different from the first sample rate.