Method and system for artificial spatialisation of digital audio

Details Method and system for artificial spatialisation of digital audio Method and system for artificial spatialisation of digital audio

1993-02-19

1996-02-13

Kuntz, Curtis

Electrical audio signal processing systems and devices

Sound effects

Reverberators

84630, H03G 300

Patent

active

054917549

ABSTRACT:
A method and a system for artificial spatialization of audio-digital signals x(k) making it possible to effect on elementary signals xi(k), replicas of the audio-digital signal, different delays creating delayed elementary signals (seri) summed after weighting with the signal x(k) in order to create the spatialized audio-digital signal y(k). A plurality of linear combinations of the signals (seri) as combined delayed elementary signals (serci) is summed with the elementary signals xi(k). So as to simulate a late reverberation, the linear combinations are effected by a unit loopback, and an attenuation hi(.omega.), a decaying monotonic function of the reverberation time Tr(.omega.) to be simulated and proportional to the delay, is effected with each delay. A spectral correction before weighted summation satisfying the relation: ##EQU1## is effected, .tau.i designating the value of each delay, increased by the phase delay due to the attenuation.

REFERENCES:
patent: 4218585 (1980-08-01), Carver
patent: 4731835 (1988-03-01), Futamase et al.
patent: 4803731 (1989-02-01), Niimi et al.
"Designing Multi-Channel Reverberators" by John Stautner and Miller Puckette, in Computer Music Journal, pp. 52-65.
Computer Music Journal, vol. 3, No. 2, 1979, Menlo Park, US pp. 13-28, J. Moorer, "About this reverberation business".
90th Audio Engineering Society Convention, Preprint 3030, Feb. 1991, New York, U.S., J-M Jot et al. "Digital delay networks for designing artificial reverberators".

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