US Patent 11705135 Detection of liveness
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US Patent 11705135 Detection of liveness
Article
Detecting a replay attack on a voice biometrics system comprises: receiving a speech signal from a voice source; generating and transmitting an ultrasound signal through a transducer of the device; detecting a reflection of the transmitted ultrasound signal; detecting Doppler shifts in the reflection of the generated ultrasound signal; and identifying whether the received speech signal is indicative of liveness of a speaker based on the detected Doppler shifts. The method further comprises: obtaining information about a position of the device; and adapting the generating and transmitting of the ultrasound signal based on the information about the position of the device.
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Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
117051350
Date of Patent
July 18, 2023
0Patent Application Number
170603390
Date Filed
October 1, 2020
0Patent Citations
Patent Primary Examiner
CPC Code
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