CPC G10L 17/22 (2013.01) [G10L 17/06 (2013.01); G10L 17/10 (2013.01); G10L 17/26 (2013.01); G10L 25/06 (2013.01)] | 20 Claims |
1. A method of authenticating a speech signal received by a device comprising first and second transducers, wherein the first transducer comprises a microphone, the method comprising:
performing a first voice biometric process on speech contained in a first part of a signal received by the microphone, in order to determine whether the speech is the speech of an enrolled user;
determining a first correlation between said first part of the signal received by the microphone and a corresponding part of the signal received by the second transducer;
determining a second correlation between a second part of the signal received by the microphone and the corresponding part of the signal received by the second transducer, said second part different from said first part; and
determining whether the first correlation and the second correlation satisfy a predetermined condition;
if it is determined that the speech contained in the first part of the received signal is the speech of an enrolled user and that the first correlation and the second correlation satisfy the predetermined condition, authenticating the received speech signal; and
if it is determined that the speech contained in the first part of the received signal is not the speech of an enrolled user, not authenticating the received speech signal.
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