Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent
1995-12-19
1998-02-03
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Pseudo stereophonic
381 25, H04S 500
Patent
active
057153175
ABSTRACT:
The present invention discloses a sound image localization apparatus for localizing a sound image at an arbitrary location in three-dimensional space by adding an attenuation in distance to a digital filter in order to reduce an operation time of convolution and approximating the head related transfer function in a three-dimensional space thereby to control the localization in real time. The sound image localization control apparatus comprises a location sensor for three-dimensional measuring of the direction and location of a listener's head, a microprocessor for correcting sound pressure attenuation in proportion to the distance between a sound source and the head relative to a digital filter that approximates the head related transfer function consistent with the direction of the head, and a convolution processor for convolving the corrected digital filter with the monaural sound source data.
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patent: 5369725 (1994-11-01), Iizuka et al.
patent: 5404406 (1995-04-01), Fuchigami et al.
patent: 5596644 (1997-01-01), Abel et al.
"C Language -Digital Signal Processing "by Kageo Akitsuki et al., published by Baifukan pp. 136-189 and p. 212.
"Spatial Hearing ", Blauert, Morimoto, Goto et al. published by Kajima Institute Publishing Co., Ltd. pp. 1-207.
Isen Forester W.
Sharp Kabushiki Kaisha
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