8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


The Awe and Mystery of T-Norm

Jiri Navratil, Ganesh N. Ramaswamy

IBM T.J. Watson Research Center, USA

A popular score normalization technique termed T-norm is the central focus of this paper. Based on widely confirmed experimental observation regarding T-norm tilting the DET curves of speaker detection systems, we set out to identify the components taking role in this phenomenon. We claim that under certain local assumptions the T-norm performs a gaussianization of the individual true and impostor score populations and further derive conditions for clockwise and counter-clockwise DET rotations caused by this transform.

Full Paper

Bibliographic reference.  Navratil, Jiri / Ramaswamy, Ganesh N. (2003): "The awe and mystery of t-norm", In EUROSPEECH-2003, 2009-2012.