The invention discloses a vocal print dynamic
password modeling and
verification method, and relates to a voice biometric
feature recognition technology. A vocal print dynamic
password modeling and
verification method having the following advantages is provided, through the method, the modeling process only needs to be performed once in the vocal print registration process, and the modeling process does not need to be performed again in the
verification process, so advantages of convenience and high efficiency can be realized, HMM and GMM(or i-vector) are combined to better fuse the voice recognition technology and the vocal print recognition technology together so as to make the identity
authentication system be more reliable. The method comprises the following steps: 1) the vocal print modeling step in which a vocal print
system is used to prompt a user to input voice, and after the voice is received and passes examination, vocal print modeling is performed; 2) the vocal print verification in which the vocal print
system is used to generate a random dynamic
password, generate corresponding restricted
syntax, and then perform voice recognition and vocal print confirmation according to the voice inputted by the user; 3) and the vocal print system is used to compare the fusion
score with a threshold
value set in advance, and give a result of acceptance and refusal. According to the invention, the recording pretending condition can be effectively prevented, so the accuracy and reliability of a vocal print
recognition system can be greatly improved.