10th Annual Conference of the International Speech Communication Association

Brighton, United Kingdom
September 6-10, 2009

Within-Session Variability Modelling for Factor Analysis Speaker Verification

Robbie Vogt (1), Jason Pelecanos (2), Nicolas Scheffer (3), Sachin Kajarekar (3), Sridha Sridharan (1)

(1) Queensland University of Technology, Australia
(2) IBM T.J. Watson Research Center, USA
(3) SRI International, USA

This work presents an extended Joint Factor Analysis model including explicit modelling of unwanted within-session variability. The goals of the proposed extended JFA model are to improve verification performance with short utterances by compensating for the effects of limited or imbalanced phonetic coverage, and to produce a flexible JFA model that is effective over a wide range of utterance lengths without adjusting model parameters such as retraining session subspaces. Experimental results on the 2006 NIST SRE corpus demonstrate the flexibility of the proposed model by providing competitive results over a wide range of utterance lengths without retraining and also yielding modest improvements in a number of conditions over current state-of-the-art.

Full Paper

Bibliographic reference.  Vogt, Robbie / Pelecanos, Jason / Scheffer, Nicolas / Kajarekar, Sachin / Sridharan, Sridha (2009): "Within-session variability modelling for factor analysis speaker verification", In INTERSPEECH-2009, 1563-1566.