System and process for locating a speaker using 360 degree...

Electrical audio signal processing systems and devices – Directive circuits for microphones

Reexamination Certificate

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C348S211110, C348S014080

Reexamination Certificate

active

07039199

ABSTRACT:
A system and process is described for estimating the location of a speaker using signals output by a microphone array characterized by multiple pairs of audio sensors. The location of a speaker is estimated by first determining whether the signal data contains human speech components and filtering out noise attributable to stationary sources. The location of the person speaking is then estimated using a time-delay-of-arrival based SSL technique on those parts of the data determined to contain human speech components. A consensus location for the speaker is computed from the individual location estimates associated with each pair of microphone array audio sensors taking into consideration the uncertainty of each estimate. A final consensus location is also computed from the individual consensus locations computed over a prescribed number of sampling periods using a temporal filtering technique.

REFERENCES:
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Zotkin, D., R. Duraiswami, I. Hariatoglu, L. Davis. A real time acoustic source localization system, TR Mar. 1999.
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Kleban, J., Combined acoustic and visual processing for video conferencing systems, MS Thesis, The State University of New Jersey, Rutgers, 2000.

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