Method and apparatus for efficient presentation of high-quality

Details Method and apparatus for efficient presentation of high-quality Method and apparatus for efficient presentation of high-quality

1994-10-27

1997-01-21

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

381 63, H04S 500

Patent

active

055966446

ABSTRACT:
Spatialization of soundfields is accomplished by filtering audio signals using filters having unvarying frequency response characteristics and amplifying signals using amplifier gains adapted in response to signals representing sound source location and/or listener position. The filters are derived using a singular value decomposition process which finds the best set of component impulse responses to approximate a given set of head related transfer functions. Efficient implementations for rendering reflection effects, and for spatializing multiple sound sources and/or generating multiple output signals are disclosed.

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Kistler et al., "A Model of Head-Related Transfer Functions Based on Principal Components Analysis and Minimum-Phase Reconstruction," J. Acoust. Soc. Am., Mar. 1992, pp. 1637-1647.
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Wightman et al., "Multidimensional Scaling Analysis of Head-Related Transfer Functions," IEEE Wrkshp on Appl. of Sig. Proc. to Audio & Acoust., Oct. 1993.
Begault, "3-D Sound for Virtual Reality and Multimedia," Academic Press, 1994, pp. v-ix, 52-61, 99-105, 123-125, 135-139, 144-146, 164-174, 179-190, 205-210.

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