PASS PHRASE BASED SPEAKER AUTHENTICATION METHOD Russian patent published in 2011 - IPC G10L15/00 G10L17/00 

FIELD: information technology.

SUBSTANCE: parameters of the input speech signal of the speaker in form of a pass phrase is compared with given accuracy e with stored standard parameters of input speech signals in form of the same pass phrase uttered by speakers known in advance, followed by authentication. Said parameters are the low-frequency part of the wavelet for conversion from the normalised distribution function of special points along the audio file corresponding to the input speech signal of the speaker in form of a pass phrase, selected by comparing the reading in that point in the audio file with preceding and next readings through generalised coefficients of linear prediction and a threshold T. Normalisation of the distribution function amounts to reducing it to standard length Len, obtained when calculating standard parameters of input speech signals in form of a pass phrase uttered by known speakers.

EFFECT: high reliability of speaker recognition when using a pass phrase with a limited length.

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