4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

On-line Incremental Adaptation for Speaker Verification using Maximum Likelihood Estimates of CDHMM Parameters

Kin Yu, John S. Mason

Speech Research Group, Department of Electrical Engineering, University of Wales, Swansea, UK

This papers investigates two approaches to on-line incremental adaptation of CDHMM parameters. First the popular MAP approach is examined, highlighting difficulties in automatically setting the adaptation rate. To overcome these problems we introduce a new approach based on the multi-observation estimation equations of the forward-backward algorithm called a cumulative likelihood estimate (CLE). Experimental results using these two approaches are compared with and without the use of a speech model for enrolment on isolated word speaker models. In both enrolment procedures, the CLE approach can achieve approximately an EER of 1% for six adaptation sequences using a single digit test token.

Full Paper

Bibliographic reference.  Yu, Kin / Mason, John S. (1996): "On-line incremental adaptation for speaker verification using maximum likelihood estimates of CDHMM parameters", In ICSLP-1996, 1752-1755.