Patent ID: 6222941
Filing Date: 2001-04-24
Classification: G06F,H03M,H04N

Abstract:
A forward wavelet transform filter for filtering an input data signal comprising:a first adder for adding a first pair of samples of the input data signal to generate a first result;a first divider coupled to receive the first result to divide the first result by a first factor into a second result, wherein the second result is output as a first low-pass coefficient;a first subtractor coupled to receive and subtract the first low-passed coefficient from the second result to produce a third result;a second subtractor for subtracting a second pair of samples of the input data signal from each other to produce a fourth result;a multiplier coupled to receive the fourth result to multiply the fourth result by a second factor to produce a fifth result;a second adder coupled to receive and add the third result and the fifth result to produce a sixth result;a second divider coupled to receive the sixth result and divide the sixth result by a third factor to generate a second low-pass coefficient, wherein the first low-pass coefficient and the second low-pass coefficient are output from the filter.