Ninth International Conference on Spoken Language Processing

Pittsburgh, PA, USA
September 17-21, 2006

A Text-Prompted Distributed Speaker Verification System Implemented on a Cellular Phone and a Mobile Terminal

Tsuneo Kato, Hisashi Kawai

KDDI R&D Laboratories Inc., Japan

For a practical application of biometrics authentication on cellular phones, a speaker verification system was implemented on a cellular phone and a PDA type mobile terminal. The system has the following three features: 1) a distributed system configuration for connectivity to internet services, 2) text-prompted speaker verification using connected digit patterns for robustness to imposture, and 3) incremental model update for preventing deterioration of accuracy. The system was examined in a two-month test, and effects of the incremental model update were evaluated with those data. Experimental results showed that the average equal error rate over this period was reduced from 8.6% to 4.4% by monthly update, to 2.9% by weekly update, and to 0.9% by daily update.

Full Paper

Bibliographic reference.  Kato, Tsuneo / Kawai, Hisashi (2006): "A text-prompted distributed speaker verification system implemented on a cellular phone and a mobile terminal", In INTERSPEECH-2006, paper 1896-Tue1CaP.11.