US 11,721,346 B2
Authentication device
John P. Lesso, Edinburgh (GB)
Assigned to Cirrus Logic, Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Jun. 10, 2020, as Appl. No. 16/897,815.
Prior Publication US 2021/0390960 A1, Dec. 16, 2021
Int. Cl. G10L 17/22 (2013.01); H04L 9/06 (2006.01); H04L 9/32 (2006.01)
CPC G10L 17/22 (2013.01) [H04L 9/0643 (2013.01); H04L 9/3268 (2013.01)] 11 Claims
OG exemplary drawing
 
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.