System and process for robust sound source localization

Details System and process for robust sound source localization System and process for robust sound source localization

2006-10-24

2006-10-24

Grier, Laura A. (Department: 2615)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C348S014080

Reexamination Certificate

active

07127071

ABSTRACT:
A system and process for finding the location of a sound source using direct approaches having weighting factors that mitigate the effect of both correlated and reverberation noise is presented. When more than two microphones are used, the traditional time-delay-of-arrival (TDOA) based sound source localization (SSL) approach involves two steps. The first step computes TDOA for each microphone pair, and the second step combines these estimates. This two-step process discards relevant information in the first step, thus degrading the SSL accuracy and robustness. In the present invention, direct, one-step, approaches are employed. Namely, a one-step TDOA SSL approach and a steered beam (SB) SSL approach are employed. Each of these approaches provides an accuracy and robustness not available with the traditional two-step approaches.

REFERENCES:
patent: 4802227 (1989-01-01), Elko et al.
patent: 5737431 (1998-04-01), Brandstein et al.
patent: 6469732 (2002-10-01), Chang et al.
patent: 6999593 (2006-02-01), Rui et al.

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