A method and system for training a user authentication by voice signal are described. In one embodiment, during training, a set of all spectral feature vectors for a given speaker is globally decomposed into speaker-specific decomposition units and a speaker-specific recognition unit. During recognition,...http://www.google.ca/patents/US6697779?utm_source=gb-gplus-sharePatent US6697779 - Combined dual spectral and temporal alignment method for user authentication by voice
