Abstract: The present invention provides a method and apparatus for enrollment and verification of speaker authentication. The method for enrollment of speaker authentication, comprising: extracting an acoustic feature vector sequence from an enrollment utterance of a speaker; and generating a speaker template using the acoustic feature vector sequence; wherein said step of extracting an acoustic feature vector sequence comprises: generating a filter-bank for the enrollment utterance of the speaker for filtering locations and energies of formants in the spectrum of the enrollment utterance based on the enrollment utterance; filtering the spectrum of the enrollment utterance by the generated filter-bank; and generating the acoustic feature vector sequence from the filtered enrollment utterance.

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.

Abstract: The present invention provides a method and apparatus for compressing a speaker template, a method and apparatus for merging a plurality of speaker templates, a method and apparatus for enrollment and verification of speaker authentication, a system for speaker authentication. Said method for compressing a speaker template that includes a plurality of feature vectors, comprising: designating a code to each of said plurality of feature vectors in said speaker template according to a codebook that includes a plurality of codes and their corresponding feature codes; and replacing a plurality of adjacent feature vectors designated with the same code in the speaker template with a feature vector.

Abstract: The present invention provides a method and apparatus for enrollment and evaluation of speaker authentication, a method for estimating discriminating ability of a speech, and a system for speaker authentication. A method for enrollment of speaker authentication, comprising: inputting a speech containing a password that is spoken by a speaker; obtaining a phoneme sequence from said inputted speech; estimating discriminating ability of the phoneme sequence based on a discriminating ability table that includes a discriminating ability for each phoneme; setting a discriminating threshold for said speech; and generating a speech template for said speech.