Patent ID: 7088869

Claim:
A wavelet transform filter, comprising: a first low-pass filter to perform a low-pass filtering operation on a set of data using a first input coefficient; a first pair of cascaded delays coupled to an output of the first low-pass filter, first pair of cascaded delays having a first and a second delay outputs to delay the output of the first low-pass filter for one and two cycles respectively; a first high-pass filter coupled to the output of the first low-pass filter and the first and second delay outputs, the first high-pass filter performing a high-pass filtering operation to generate coefficients to be used in an LH subband; a second pair of cascaded delays coupled to an input of the first low-pass filter to receive the set of data, the second pair of cascaded delays having a third and a fourth delay outputs to delay the set of data for one and two cycles respectively; and a second high-pass filter coupled to receive the third and fourth delay outputs and the set of data, the second high-pass filter performing a high-pass filtering operation to generate coefficients to be used in an HH subband.