Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent
1997-05-19
1999-02-16
Kuntz, Curtis A.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Pseudo stereophonic
381 17, 381 1, 381 22, H04R 500
Patent
active
058728511
ABSTRACT:
A stereophonic signal processing system for enhancing the perception of sonic dimension and imaging in a sound reproduction system having at least two stereo speakers. The system provides a detector for detecting the continually changing value of amplitude ratio of a derived stereo difference signal relative to a derived stereo sum signal and dynamically expands, in real-time, changes in such ratio-value in the left-front and right-front output signals; an element for utilizing the ratio-value to control a decrease in the amplitudes of the front-left and front-right output signals; an element for utilizing the ratio-value to control a boost in the relative amplitude of bass frequencies in the left-front and right-front output signals and a boost in the amplitude of a subwoofer output signal; an element for utilizing the ratio-value to control a boost in amplitude of derived stereo difference signals that provide left-rear and right-rear output signals; and an element for utilizing the derived stereo sum signal to provide a center-front output signal.
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Harman Motive Incorporated
Kuntz Curtis A.
McTaggart J. E.
Mei Xu
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