8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


Segmenting Multiple Concurrent Speakers Using Microphone Arrays

Guillaume Lathoud, Iain A. McCowan, Darren C. Moore

IDIAP, Switzerland

Speaker turn detection is an important task for many speech processing applications. However, accurate segmentation can be hard to achieve if there are multiple concurrent speakers (overlap), as is typically the case in multi-party conversations. In such cases, the location of the speaker, as measured using a microphone array, may provide greater discrimination than traditional spectral features. This was verified in previous work which obtained a global segmentation in terms of single speaker classes, as well as possible overlap combinations. However, such a global strategy suffers from an explosion of the number of overlap classes, as each possible combination of concurrent speakers must be modeled explicitly. In this paper, we propose two alternative schemes that produce an individual segmentation decision for each speaker, implicitly handling all overlapping speaker combinations. The proposed approaches also allow straightforward online implementations. Experiments are presented comparing the segmentation with that obtained using the previous system.

Full Paper

Bibliographic reference.  Lathoud, Guillaume / McCowan, Iain A. / Moore, Darren C. (2003): "Segmenting multiple concurrent speakers using microphone arrays", In EUROSPEECH-2003, 2889-2892.