REPORT PicassoEsp-IRR99-24/IDIAP An Overview of the PICASSO Project Research Activities in Speaker Verification for Telephone Applications Bimbot, Frédéric Blomberg, Mats Boves, Louis Chollet, Gérard Jaboulet, Cédric Jacob, Bruno Kharroubi, Jamal Koolwaaij, Johan Lindberg, Johan Mariéthoz, Johnny Mokbel, Chafic Mokbel, Houda Idiap-RR-24-1999 1999 IDIAP This paper presents a general overview of the current research activities in the European PICASSO project on speaker verification for telephone applications. First, the general formalism used by the project is described. Then the scientific issues under focus are discussed in detail. Finally, the paper briefly describes the Picassoft research platform. Along the article, entry points to more specific work also published in the Eurospeech99 proceedings are given.