CONF Khoury_ODYSSEY_2014/IDIAP Hierarchical speaker clustering methods for the NIST i-vector Challenge Khoury, Elie El Shafey, Laurent Ferras, Marc Marcel, Sébastien EXTERNAL http://publications.idiap.ch/attachments/papers/2014/Khoury_ODYSSEY_2014.pdf PUBLIC Odyssey: The Speaker and Language Recognition Workshop 2014