Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent
1998-03-19
2000-09-12
Chang, Vivian
Electrical audio signal processing systems and devices
Binaural and stereophonic
Pseudo stereophonic
381 27, H04R 500
Patent
active
06118876&
ABSTRACT:
An apparatus for realistically reproducing sound, particularly for sound based on a stereophonic signal having dialog and effects and associated with an accompanying video image. The apparatus includes a front speaker located in proximity to the video image for providing acoustic output based upon a summation signal of the component left and right (L+R) channels of the audio signal. A rear speaker located to the rear of the viewing area provides acoustic output based upon a difference signal, (L-R) or (R-L), between the left and right channels. The left and right side speakers are located to the respective left and right sides of the viewing area. The left side speaker provides two acoustic outputs in accordance with a band limited left channel signal and a band limited difference signal. The right side speaker provides two acoustic outputs in accordance with a band limited right channel signal and a band limited difference signal. Band limiting substantially filters out frequency components below a predetermined threshold. A bass speaker may also be provided to output the low frequency components of a (L+R) summation signal. The (L+R) summation signal input to the front speaker assists in localizing dialog to the video image.
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Chang Vivian
REP Investment Limited Liability Company
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