Detecting a replay attack on a voice biometrics system comprises: receiving a speech signal;
generating an ultrasound signal; detecting a reflection of the generated ultrasound signal; …

Primary Examiner Brandon S Hoffman Assistant Examiner William A Corum, Jr.(74) Attorney,
Agent, or Firm Jackson Walker LLP (57) ABSTRACT The present invention relates to …

A method of speaker identification comprises receiving an audio signal representing
speech; performing a first voice biometric process on the audio signal to attempt to identify …

Detecting liveness of a speaker comprises: generating an ultrasound signal; receiving an
audio signal comprising a reflection of the ultrasound signal; using the received audio signal …

(57) ABSTRACT A method of determining whether a sound has been generated by a
loudspeaker comprises receiving an audio signal representing at least a part of the sound …

In order to detect a replay attack on a voice biometrics system, a speech signal is received at
at least a first microphone and a second microphone. The speech signal has components at …

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 …

In order to detect a replay attack on a voice biometrics system, a first signal from received
sound is generated at a first microphone, and a second signal from the received sound is …

A method for authenticating a user of an electronic device is disclosed. The method
comprises: responsive to detection of a trigger event indicative of a user interaction with the …

Embodiments described herein provide for automatically detecting whether an audio signal
is a spoofed audio signal or a genuine audio signal. A spoof detection system can include …