ODYSSEY 2004 - The Speaker and Language Recognition Workshop May 31 - June 3, 2004 Toledo, Spain

BECARS: A Free Software for Speaker Verification

Raphael Blouet (1), Chafic Mokbel (2), Hoda Mokbel (2), Eduardo Sánchez Soto (1), Gérard Chollet (1), Hanna Greige (2)

(1) ENST, dépt. TSI, Paris, France
(2) University of Balamand, El-Koura, Tripoli, Lebanon

The aim of Automatic Speaker Verification (ASV) is to detect whether a speech segment has been uttered by the claimed identity or by an impostor. Our contribution includes the distribution of BECARS , a free software based on Gaussian Mixture Models (GMM) for Automatic Speaker Verification (ASV), and the design of a new methodology to estimate the decision score in an ASV system. BECARS in available at http://www.tsi.enst.fr/~blouet/Becars/ . The main characteristic of this software is to allow the use of several adaptation techniques including the most common ones such as Maximum A Posteriori (MAP) and Maximum Likelihood Linear Regression (MLLR). The proposed method for score computation is based on the use of a hierarchical Gaussian clusterization method that we describe in details in this paper.

We introduce this work with a general summary of Automatic Speaker Verification (ASV), followed by a description of the adaptation technique available in BECARS used in this work. We then present and evaluate our score computation scheme before concluding the paper.

Full Paper

Bibliographic reference.  Blouet, Raphael / Mokbel, Chafic / Mokbel, Hoda / Soto, Eduardo Sánchez / Chollet, Gérard / Greige, Hanna (2004): "BECARS: a free software for speaker verification", In ODYS-2004, 145-148.