Energy-based sound source localization and gain normalization for ad hoc microphone arrays

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.

LiuZHC07.pdf
PDF file

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

Publisher  Institute of Electrical and Electronics Engineers, Inc.
© 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Details

TypeInproceedings
> Publications > Energy-based sound source localization and gain normalization for ad hoc microphone arrays