A Text-prompted Distributed Spe Implemented on a Cellular Pho
نویسنده
چکیده
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.
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