Methods, apparatus and systems for biometric processes

    公开(公告)号:US11450097B2

    公开(公告)日:2022-09-20

    申请号:US17182388

    申请日:2021-02-23

    Abstract: Described embodiments relate to a method operable in a biometric authentication system. The method comprises initiating generation of an acoustic stimulus for application to a user's ear; and determining a quality measure of a response signal to the acoustic stimulus. Responsive to determining that the quality measure is inadequate for performing a biometric process, the method comprises one or more of: (i) modifying one or more properties of the acoustic stimulus to improve a signal to noise ratio, SNR, of the response signal and (ii) cancelling the effect of noise from outside the ear on the response signal of the user's ear to the acoustic stimulus to improve the SNR of the response signal.

    Headset on ear state detection
    17.
    发明授权

    公开(公告)号:US11451898B2

    公开(公告)日:2022-09-20

    申请号:US17001997

    申请日:2020-08-25

    Abstract: A method and device for detecting whether a headset is on ear. A probe signal is generated for acoustic playback from a speaker. A microphone signal from a microphone is received, the microphone signal comprising at least a portion of the probe signal as received at the microphone. The microphone signal is passed to a state estimator, to produce an estimate of at least one parameter of the portion of the probe signal contained in the microphone signal. The estimate of the at least one parameter is processed to determine whether the headset is on ear.

    Methods, apparatus and systems for biometric processes

    公开(公告)号:US10970575B2

    公开(公告)日:2021-04-06

    申请号:US16833935

    申请日:2020-03-30

    Abstract: Described embodiments relate to a method operable in a biometric authentication system. The method comprises initiating generation of an acoustic stimulus for application to a user's ear; and determining a quality measure of a response signal to the acoustic stimulus. Responsive to determining that the quality measure is inadequate for performing a biometric process, the method comprises one or more of: (i) modifying one or more properties of the acoustic stimulus to improve a signal to noise ratio, SNR, of the response signal and (ii) cancelling the effect of noise from outside the ear on the response signal of the user's ear to the acoustic stimulus to improve the SNR of the response signal.

    Audio data transfer
    20.
    发明授权

    公开(公告)号:US10957328B2

    公开(公告)日:2021-03-23

    申请号:US16027728

    申请日:2018-07-05

    Abstract: This application relates to transfer of microphone data from a microphone (101, 102, 102a, 201) to a processing module, such as voice biometric authentication module (111) in a secure manner, such that the receiving module can trust that the received audio is genuine. An authentication module (203) is configured to receive microphone data (DM) representative of an audio signal received at the microphone (201), and generate from the microphone data, authentication data (DA) for certifying that the microphone data did pass via the authentication module. The first authentication data (DA) comprises information relating to distinguishing characteristics of the audio content of the microphone data and may, for instance be an acoustic fingerprint of the audio content. The authentication data, may be cryptographically signed or encrypted and sent with the microphone audio to allow a receiver to verify that the audio is genuine and the content has not been substantially altered. The process may be robust to processing of the data that results in imperceptible changes in the audio content.

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