8th Annual Conference of the International Speech Communication Association

Antwerp, Belgium
August 27-31, 2007

VZ-Norm: An Extension of Z-Norm to the Multivariate Case for Anchor Model Based Speaker Verification

D. Charlet (1), M. Collet (1), Frédéric Bimbot (2)

(1) France Télécom, France
(2) IRISA, France

This paper proposes a vectorial Z-normalization approach, the VZ-norm, which extends Z-normalisation to the multivariate case. It is applied in the framework of Anchor Model (AM) based speaker verification. It experimentally proves to significantly improve performance of anchor models on NIST and ESTER databases. A comparative study of different strategies for computing the covariance matrix involved in the AM VZ-norm is presented and commented.

Full Paper

Bibliographic reference.  Charlet, D. / Collet, M. / Bimbot, Frédéric (2007): "VZ-norm: an extension of z-norm to the multivariate case for anchor model based speaker verification", In INTERSPEECH-2007, 742-745.