Voice verification circuit for validating the identity of an unknown person
First Claim
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1. A method of verifying the identity of an unknown person, whereby the unknown person'"'"'s identity is determined to be either a true speaker or an imposter, comprising the steps of:
- receiving input speech from the unknown person;
coding the input speech into a set of predetermined spectral and energy parameters;
transforming the parameters based on a predetermined statistically maximized discrimination between true speakers and successful impostors; and
comparing the transformed parameters with a stored reference model to verify the identity of the unknown person.
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Abstract
A speaker verification system receives input speech from a speaker of unknown identity. The speech undergoes linear predictive coding (LPC) analysis and transformation to maximize separability between true speakers and impostors when compared to reference speech parameters which have been similarly transformed. The transformation incorporated a "inter-class" covariance matrix of successful impostors within a database.
51 Citations
21 Claims
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1. A method of verifying the identity of an unknown person, whereby the unknown person'"'"'s identity is determined to be either a true speaker or an imposter, comprising the steps of:
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receiving input speech from the unknown person; coding the input speech into a set of predetermined spectral and energy parameters; transforming the parameters based on a predetermined statistically maximized discrimination between true speakers and successful impostors; and comparing the transformed parameters with a stored reference model to verify the identity of the unknown person. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of verifying the identity of an unknown person over a telephone network, whereby the unknown person'"'"'s identity is determined to be either a true speaker or an imposter, comprising the steps of:
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receiving input speech from the unknown person over the telephone network; coding the input speech into a set of predetermined spectral and energy parameters; transforming the parameters based on a predetermined statistically maximized discrimination between true speakers and successful impostors; and comparing the transformed parameters with a stored reference model to verify the identity of the unknown person. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. Apparatus for verifying the identity of an unknown person, whereby the unknown person'"'"'s identity is determined to be either a true speaker or an imposter, comprising:
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circuitry for receiving input speech from the unknown person; circuitry for coding the input speech into a set of predetermined spectral and energy parameters; circuitry for transforming the parameters based on a predetermined statistically maximized discrimination between true speakers and successful imposters; and circuitry for comparing the transformed parameters with a stored reference model to verify the identity of the unknown person. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification