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 …

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 …

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 …

A method of speaker recognition comprises: receiving an audio signal comprising speech;
performing a biometric process on a first part of the audio signal, wherein the first part of the …

Methods, apparatus and systems for biometric authentication based on an audio signal are
provided. The audio signal comprises a representation of a voice signal of a user conducted …

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 …

Embodiments of the disclosure relate to methods, apparatus and systems for biometric
processes. The invention relates to initiating generation of an acoustic stimulus for …

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. The audio signal is …

Embodiments of the invention relate to methods, apparatus and systems for biometric
processes. The methods include updating stored ear model data for a user following …

(57) ABSTRACT Related US Application Data A method of detecting a replay attack
comprises: receiving an audio signal representing speech; identifying speech (63) …