We present an energy-based technique to estimate both microphone

and speaker/talker locations from an ad hoc network of

microphones. An example of such ad hoc microphone network is

a set of microphones built in the laptops that some meeting participants

bring in a meeting room. Compared with traditional sound

source localization approaches based on time of flight, our technique

does not require accurate synchronization, and it does not require

each laptop to emit special signals. We estimate the meeting

participants' positions based on average energies of their speech

signals. In addition, we present a technique, which is independent

of the volumes of the speakers, to estimate the relative gains of the

microphones. This is crucial to aggregate various audio channels

from the ad hoc microphone network into a single stream for audio

conferencing.

PDF file

In: IEEE Int'l Conf. Acoustics, Speech, and Signal Processing

Publisher: Institute of Electrical and Electronics Engineers, Inc.
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