Patent ID: 7974425
Filing Date: 2011-07-05
Classification: H04R,H04S

Abstract:
1. A sound reproduction system for a surround sound stereophonic system, comprising: a surround left speaker; a surround right speaker; a pair of surround back speakers located in close proximity and oriented in substantially the same direction, said surround back speakers comprising a surround back left speaker and a surround back right speaker; a surround left channel audio signal electrically connected to said surround left speaker; a surround right channel audio signal electrically connected to said surround right speaker; and a sound processor receiving as inputs said left channel audio signal and said right channel audio signal, said sound processor configured to generate a difference signal representing a difference between said surround left channel audio signal and said surround right channel audio signal, apply spectral weighting to said difference signal thereby generating a spectrally weighted signal, and cross-cancel said spectrally weighted signal with said surround left channel audio signal and said surround right channel audio signal to respectively generate a surround back left speaker signal and a surround back right speaker signal for said surround back left and right speakers.