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

1997-01-17

1998-09-01

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

381 63, H04S 500, H03G 300

Patent

active

058021809

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 target set of impulse responses corresponding to head related transfer functions. Efficient implementations for rendering reflection effects, air absorption losses and other ambient effects, and for spatializing multiple sound sources and/or generating multiple output signals are disclosed.

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patent: 5596644 (1997-01-01), Abel et al.
Martens, "Principal Components Analysis and Resynthesis of Spectral Cues to Perceived Direction," ICMC Proceedings, 1987, pp. 274-281.
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.
Wenzel, "Localization in Virtual Acoustic Displays," Presence, vol. 1, No. 1, 1992, pp. 80-107.
Wightman et al., "Multidimensional Scaling Analysis of Head-Related Transfer Functions," IEEE Workshop 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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