Patent ID: 6448846
Filing Date: 2002-09-10
Classification: H04R

Abstract:
A signal processing device comprising:at least one filter adapted to receive an input signal and further adapted to phase shift frequency components of said input signal that are in a stopband range of a frequency spectrum, said at least one filter further adapted to output frequency components of said input signal that are in a passband range of the frequency spectrum and said phase shifted frequency components of said stopband range of the frequency spectrum, said at least one filter including a low-pass filter having at least one pole frequency setting and an output gain setting; a high-pass filter having at least one pole frequency setting and an output gain setting, said high-pass filter in a parallel arrangement with said low-pass filter; a gain control circuit adapted to receive and variably amplify/attenuate said input signal where the gain of said gain control circuit is dependent on the at least one pole frequency of said low-pass filter; the output gain of said low-pass filter; the at least one pole frequency of said high-pass filter; and the output gain of said high-pass filter; and a summing device coupled to said at least one filter, said summing device adapted to receive and sum said frequency components of an output signal from said at least one filter that are in said passband range of the frequency spectrum; said phase shifted frequency components of said stopband range of the frequency spectrum; and an output signal of said gain control circuit.