Audio enhancement system

Abstract

A stereo enhancement system processes the difference signal component generated from a pair of left and right input signals to create a broadened stereo image reproduced through a pair of speakers or through a surround sound system. Processing of the difference signal component occurs through equalization characterized by amplification of the low and high range of auditory frequencies. The processed difference signal is combined with a sum signal, generated from the left and right input signals, and the original left and right input signals to create enhanced left and right output signals.

1 . A method for enhancing sound, the method comprising: 
 receiving a first input and a second input;    a difference circuit configured to identify difference information in the first and second inputs;    spectrally shaping the difference information to provide a a maximum boost in a lower range of frequencies; and    combining the spectrally shaped difference information with the first input signal to to generate a first output that contains the spectrally shaped difference information and at least a portion of the first input signal.