Reverberation-Robust Online Multi-Speaker Tracking by using a Microphone Array and CASA Processing

Axel Plinge, Marius H. Hennecke and Gernot A. Fink
Proc. 13th International Workshop on Acoustic Signal Enhancement (IWAENC), 2012.

Aachen, Germany

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Online tracking of speakers is an important task for applications in smart environments such as camera control, meeting annotation and speech separation. Challenges for an audio-only system are small-room reverberation, noise, the unknown number of speakers, and gaps occurring in natural speech. Combining models from neurobiology and cognitive psychology with many-channel signal processing and pattern recognition techniques, a hybrid method was developed. By employing online CASA processing to signals from a microphone array, the real-time capable method is able to track an arbitrary number of concurrent moving speakers in highly reverberant environments.