CONF jaboulet-eurospeech97/IDIAP Speaker Verification in the Telephone Network : Research Activities in the CAVE Project Bimbot, Frédéric Hutter, H. P. Jaboulet, Cédric Koolwaaij, Johan Lindberg, Johan Pierrot, J. B. EXTERNAL http://publications.idiap.ch/attachments/papers/1997/jaboulet97.pdf PUBLIC Proceedings of the European Conference on Speech Communication and Technology (EUROSPEECH'97) 1997 This paper summarizes the main results from the Speaker Verification (SV) research pursued so far in the CAVE project. Different state-of-the art SV algorithms were implemented in a common HMM framework and compared on two databases : YOHO (office environment speech) and SESP (telephone speech). This paper is concerned with the different design issues for LR-HMM-based SV algorithms which emerged from our investigations and which led to our current SV system, which delivers Equal Error Rates below 0.5 \% on a very realistic telephone speech database.