Patent ID: 11894000
Assignee: CIRRUS LOGIC INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 18:
19. A system for authenticating a speech signal received by a device comprising first and second transducers, wherein the first transducer comprises a microphone, the system comprising:
at least one input for receiving signals generated by the microphone and by the second transducer; and
a processor configured for performing a method comprising:
performing a first voice biometric process on speech contained in a first part of the signal generated 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 generated by the microphone and a corresponding part of the signal generated by the second transducer;
determining a second correlation between a second part of the signal generated by the microphone and the corresponding part of the signal generated by the second transducer, said second part different from said first part;
determining whether the first correlation and the second correlation satisfy a predetermined condition; and

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.