Abstract
Apparatus and method for operating a speech password system. The system apparatus records and stores a plurality of alphanumeric models. A user password is enrolled by the apparatus recognizing spoken sounds and comparing spoken password enrollment sounds with each of the alphanumeric models. Each user password is stored in the system by recording a pair of clusters identifying five alphanumeric models closest to and farther from the user spoken password enrollment sounds of the password. The system identifies subsequent passwords by recognizing a spoken access password and comparing the sounds thereof with each of the cluster identified alphanumeric models and assigning scores representing the similarity of the password access sounds with the alphanumeric models recorded in the pair of clusters. The spoken password access sounds are identified as a previously enrolled password by summarizing the cluster assigned scores and comparing the summation thereof with a predetermined threshold.
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