Patent ID: 6597791
Filing Date: 2003-07-22
Classification: H04S

Abstract:
An apparatus for enhancing sound, the apparatus comprising:a high-pass filter which receives at least a first input signal and a second input signal, the filter configured to decrease the amplitude of a first set of lower frequencies in the first and second input signals relative to the amplitude of other frequencies in the first and second input signals to create at least a first modified signal and a second modified signal; a first summing circuit configured to identify sum information in the first input and second input signals; a difference circuit in communication with the high-pass filter, the difference circuit configured to identify the difference information in the first and second modified signals; an equalizer in communication with the difference circuit, the equalizer configured to spectrally shape the difference information; and a second summing circuit in communication with the first summing circuit, the equalizer and the first input signal, the second summing circuit configured to combine at least a portion of the spectrally shaped difference information, the first input signal, and at least a portion of the sum information to generate a combined signal.