Patent ID: 6600838
Filing Date: 2003-07-29
Classification: G06F

Abstract:
A pre-decomposition filter of a wavelet transform system for mapping a set of original data samples into a set of dual scaling function coefficients for decomposition by the wavelet transform system, the sets of original data samples and dual scaling function coefficients being related to a set of scaling function coefficients, to scaling functions that correspond to the set of scaling function coefficients, and to dual scaling functions that are dual to the scaling functions and correspond to the set of dual scaling function coefficients, the pre-decomposition filter comprising:a first filter stage that filters the set of original data samples to generate a first set of intermediate coefficients; a second filter stage that is parallel to the first filter and filters the set of original data samples to generate a second set of intermediate coefficients; and a summing stage that sums the first and second sets of intermediate data samples to generate the set of dual scaling function coefficients.