CPC G10L 17/22 (2013.01) [H04L 9/0643 (2013.01); H04L 9/3268 (2013.01)] | 11 Claims |
1. A method of authenticating a speech signal in a first device, the method comprising:
receiving a speech signal;
performing a live speech detection process to determine whether the received signal represents live speech, wherein the live speech detection process generates a live speech detection output;
forming a certificate by encrypting at least a quality metric of the received signal with the live speech detection output, wherein the quality metric of the received signal comprises a fundamental frequency of speech in the received signal; and
transmitting the received signal and the certificate to a separate second device.
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