公开(公告)号：US20190014429A1

公开(公告)日：2019-01-10

申请号：US16026103

申请日：2018-07-03

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert LUKE ,  Vitaliy SAPOZHNYKOV ,  Thomas Ivan HARVEY

IPC: H04R29/00 ,  H04R1/40 ,  H04R3/00

Abstract: Detection of a blocked microphone involves receiving microphone signals from a plurality of microphones. A plurality of signal feature measures are derived from the microphone signals. The signal feature measures are normalised. The normalised signal feature measures are variably weighted in response to detected environmental conditions in the microphone signals. The variably weighted normalised signal feature measures are combined to produce an output indication of whether a microphone is blocked.

公开(公告)号：US20180098152A1

公开(公告)日：2018-04-05

申请号：US15708890

申请日：2017-09-19

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Vitaliy SAPOZHNYKOV ,  Henry CHEN

IPC: H04R3/14 ,  H04R5/04 ,  H04R3/04

CPC classification number: H04R3/14 ,  H04R3/04 ,  H04R5/04 ,  H04R2430/01

Abstract: A crosstalk canceller for reducing acoustic crosstalk at a time of audio playback is derived by forming a channel frequency response for a nominated playback geometry, and decomposing the channel frequency response to derive a decomposition element such as a singular value decomposition matrix. A value of the decomposition element, such as the smallest singular value, is then adjusted to reduce spectral coloration, and filter coefficients of a crosstalk cancellation filter are derived from the adjusted decomposition element.

公开(公告)号：US20220095044A1

公开(公告)日：2022-03-24

申请号：US17543085

申请日：2021-12-06

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Vitaliy SAPOZHNYKOV ,  Thomas I. HARVEY ,  Hock LIM ,  David WATTS

IPC: H04R3/00 ,  G01P15/18 ,  H04R1/10 ,  H04R1/22

Abstract: A method, comprising: obtaining one or more accelerometer signals derived from an accelerometer; and determining one or more parameters of wind at the accelerometer based on the one or more accelerometer signals.

公开(公告)号：US20210248403A1

公开(公告)日：2021-08-12

申请号：US17182388

申请日：2021-02-23

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Thomas Ivan HARVEY ,  Vitaliy SAPOZHNYKOV ,  Brenton POTTER

IPC: G06K9/03 ,  G06K9/00 ,  G06F21/32

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.

公开(公告)号：US20200058285A1

公开(公告)日：2020-02-20

申请号：US16539092

申请日：2019-08-13

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Viral PARIKH ,  Jon D. HENDRIX ,  Jeffrey D. ALDERSON ,  Vitaliy SAPOZHNYKOV ,  Nafiseh ERFANIAN SAEEDI ,  Thomas I. HARVEY ,  Robert LUKE

IPC: G10K11/178

Abstract: An integrated circuit for implementing at least a portion of a personal audio device may include an output for providing an output signal to a transducer, wherein the output signal includes a pilot signal, a microphone input for receiving a microphone signal from a microphone indicative of an output of the transducer, and a processing circuit. The processing circuit may be configured to implement a pilot signal control to apply an adjustment to the pilot signal as necessary to maintain the pilot signal at a substantially constant magnitude regardless of proximity of the transducer to a pinna and implement a proximity determination block configured to determine proximity of the transducer to the pinna based on the adjustment.

公开(公告)号：US20190342683A1

公开(公告)日：2019-11-07

申请号：US16515934

申请日：2019-07-18

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert LUKE ,  Vitaliy SAPOZHNYKOV ,  Thomas Ivan HARVEY

IPC: H04R29/00 ,  H04R1/40 ,  H04R3/00

Abstract: Detection of a blocked microphone involves receiving microphone signals from a plurality of microphones. A plurality of signal feature measures are derived from the microphone signals. The signal feature measures are normalised. The normalised signal feature measures are variably weighted in response to detected environmental conditions in the microphone signals. The variably weighted normalised signal feature measures are combined to produce an output indication of whether a microphone is blocked.

公开(公告)号：US20190200114A1

公开(公告)日：2019-06-27

申请号：US16288451

申请日：2019-02-28

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Vitaliy SAPOZHNYKOV ,  Thomas Ivan HARVEY ,  Nafiseh ERFANIANSAEEDI ,  Robert LUKE

IPC: H04R1/10 ,  H04R1/40 ,  H04R3/00 ,  H04R29/00

CPC classification number: H04R1/1041 ,  G10K11/17815 ,  G10K11/17817 ,  G10K11/17823 ,  G10K11/17825 ,  G10K2210/1081 ,  G10K2210/30351 ,  G10K2210/3043 ,  G10K2210/3046 ,  G10K2210/503 ,  H04R1/1008 ,  H04R1/1016 ,  H04R1/406 ,  H04R3/005 ,  H04R29/001 ,  H04R2420/07

Abstract: A method and device for detecting whether a headset is on ear. Microphone signals from a plurality of microphones are used to derive a plurality of signal feature measures, which are normalized to a common reference scale. The signal feature measures are weighted based upon detected signal conditions in the microphone signals. The normalized and variably weighted signal feature measures are then combined to produce an output indication of whether a headset is on ear.

公开(公告)号：US20190013027A1

公开(公告)日：2019-01-10

申请号：US16027728

申请日：2018-07-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Michael PAGE ,  Thomas Ivan HARVEY ,  Vitaliy SAPOZHNYKOV

IPC: G10L17/22 ,  G10L19/018 ,  G10L25/51

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.

公开(公告)号：US20170257725A1

公开(公告)日：2017-09-07

申请号：US15447944

申请日：2017-03-02

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Vitaliy SAPOZHNYKOV

IPC: H04S7/00

Abstract: An acoustic crosstalk canceller is determined for an asymmetric audio playback device, by determining a transfer function of an acoustic stereo playback path having asymmetries defined by speakers of the playback device. The transfer function is inverted to determine an inverse transfer function. The inverse transfer function is regularised by applying frequency dependent regularisation parameters to obtain an acoustic crosstalk canceller. Also, the inverse transfer function could be regularised for symmetric playback paths by applying aggregated frequency dependent regularisation parameters to obtain an acoustic crosstalk canceller without band branching.