Microphone Arrays for Source Location
James L. Flanagan, Mike Bianchi (Bellcore)
Principal Investigators
Daniel V. Rabinkin, Richard J. Renomeron, Art Dahl, Joe French
Center for Computer Aids for Industrial Productivity, Rutgers University
Microphone Arrays for Automatic Videoconferencing
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Microphone Arrays provide a means for determining the point of sound origin
(e.g. the location of a speaker).
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Speaker coordinates may be used to direct a camera at a member of an audience
during a question-and-answer session, and can also provide directed sound
capture.
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A microphone array system may be used to eliminate the need for a human
camera operator in an auditorium or conference hall environment.
Source Location Algorithm
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Select speech frame with sufficient speech energy.
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Determine time delay of arrival (TDOA): The relative delay in source sound
arrival for selected microphone pairs using the Cross-Power Spectrum
Phase Algorithm.
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Estimate source location by searching space to minimize error between estimated
delays and computed delays for microphone pair aggregate.
The Source Location System
Go back to the Microphone
Array Home Page
Rich Renomeron <renomero@caip.rutgers.edu>