Method and apparatus for verification of speaker authentication

Details Method and apparatus for verification of speaker authentication Method and apparatus for verification of speaker authentication

2007-03-28

2010-10-05

Azad, Abul (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C704S203000

Reexamination Certificate

active

07809561

ABSTRACT:
The present invention provides a method and apparatus for verification of speaker authentication. A method for verification of speaker authentication, comprising: inputting an utterance containing a password that is spoken by a speaker; extracting an acoustic feature vector sequence from said inputted utterance; DTW-matching said extracted acoustic feature vector sequence and a speaker template enrolled by an enrolled speaker; calculating each of a plurality of local distances between said DTW-matched acoustic feature vector sequence and said speaker template; nonlinear-transforming said each local distance calculated to give more weights on small local distances; calculating a DTW-matching score based on said plurality of local distances nonlinear-transformed; and comparing said matching score with a predefined discriminating threshold to determine whether said inputted utterance is an utterance containing a password spoken by the enrolled speaker.

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