US 11,704,397 B2
Detection of replay attack
John Paul Lesso, Edinburgh (GB)
Assigned to Cirrus Logic, Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Oct. 20, 2020, as Appl. No. 17/74,743.
Application 17/074,743 is a continuation of application No. 16/018,795, filed on Jun. 26, 2018, granted, now 10,853,464.
Claims priority of provisional application 62/526,013, filed on Jun. 28, 2017.
Prior Publication US 2021/0034730 A1, Feb. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 21/32 (2013.01); H04L 9/32 (2006.01); G10L 25/03 (2013.01); G10L 17/02 (2013.01); H04K 1/00 (2006.01); H04L 9/40 (2022.01); G06F 21/55 (2013.01); H04W 12/122 (2021.01); G01R 33/00 (2006.01); G10L 15/24 (2013.01); G10L 17/26 (2013.01); H04R 3/00 (2006.01)
CPC G06F 21/32 (2013.01) [G01R 33/0094 (2013.01); G06F 21/554 (2013.01); G10L 15/24 (2013.01); G10L 17/02 (2013.01); G10L 17/26 (2013.01); G10L 25/03 (2013.01); H04K 1/00 (2013.01); H04L 9/3231 (2013.01); H04L 63/0861 (2013.01); H04L 63/1466 (2013.01); H04L 63/1483 (2013.01); H04W 12/122 (2021.01); H04R 3/00 (2013.01); H04R 3/005 (2013.01); H04R 2499/13 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of detecting a replay attack in a speaker recognition system, the method comprising:
receiving an audio signal comprising speech;
receiving a magnetometer signal;
determining a syllabic rate or an articulation rate of the speech;
detecting modulation of at least one feature of the magnetometer signal at the syllabic rate or the articulation rate;
determining based on the detecting that the at least one identified feature of the detected magnetic field is indicative of playback of speech through a loudspeaker; and
determining that a replay attack may have taken place.