公开(公告)号：US20190012448A1

公开(公告)日：2019-01-10

申请号：US16029015

申请日：2018-07-06

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO

IPC: G06F21/32 ,  H04R5/033

Abstract: Embodiments of the invention relate to methods, apparatus and systems for biometric authentication based on an audio signal, wherein the audio signal comprises a representation of a voice signal of a user conducted via at least part of a user's skeleton. Further embodiments of the disclosure may relate to biometric authentication based upon a combination of a bone-conducted audio signal, or a bone-conducted voice biometric process, with an air-conducted voice signal.

公开(公告)号：US20190012446A1

公开(公告)日：2019-01-10

申请号：US16028907

申请日：2018-07-06

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO

IPC: G06F21/32 ,  G10K11/178 ,  G06F17/18

Abstract: Embodiments of the disclosure relate to methods, apparatus and systems for biometric processes. The invention relates to initiating generation of an acoustic stimulus for application to a user's ear and extracting features for use in a biometric process from a measured response signal. The measured response signal may be used to derive one or more quality metrics and the quality metrics may be used to validate features extracted from the measured response. The quality metrics may be used to provide feedback to the user seeking to carry out the biometric process.

公开(公告)号：US20180351569A1

公开(公告)日：2018-12-06

申请号：US15991619

申请日：2018-05-29

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  David Paul SINGLETON

IPC: H03M1/50 ,  H03M1/08 ,  H03M1/06 ,  H03M1/34

CPC classification number: H03M1/504 ,  H03M1/0604 ,  H03M1/0626 ,  H03M1/0854 ,  H03M1/182 ,  H03M1/34 ,  H03M1/508

Abstract: This application relates time-encoding modulators such as may be used as part of analogue-to-digital conversion. A time-encoding modulator (100) receives an analogue input signal (SIN) at an input node (102) and outputs a corresponding time-encoded signal (SOUT) at an output node (103). A hysteretic comparator (101) has a first comparator input connected to the input node and a comparator output connected to the output node. A feedback path extends between the output node and a second comparator input of the hysteretic comparator; with a filter arrangement (104) arranged to apply filtering to the feedback path. The hysteretic comparator (101) compares the input signal (SIN) to the feedback signal (SFB) with hysteresis. This provides a pulse-width modulated output signal (SOUT) where the duty cycle encodes the input signal (SIN).

公开(公告)号：US20180288545A1

公开(公告)日：2018-10-04

申请号：US15935489

申请日：2018-03-26

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  Emmanuel Philippe Christian HARDY

IPC: H04R29/00 ,  G01K11/26 ,  G10L25/60

CPC classification number: H04R29/004 ,  G01K11/26 ,  G10L25/18 ,  G10L25/51 ,  G10L25/60 ,  H04R19/005 ,  H04R2499/11

Abstract: This application relates to an apparatus (300) for monitoring an operating temperature condition of a microphone device (100) having an acoustic port (110). The apparatus includes a spectrum peak detect block (301) for receiving a microphone signal (SMIC) and determining, from the microphone signal, a resonance frequency (fH) and a quality factor (QH) of a resonance (202) associated with the acoustic port of the microphone. A condition monitoring block (302) is configured to determine any change in resonance frequency and quality factor with respect to respective reference values of resonance frequency and quality factor and to determine a temperature condition for the air temperature within the acoustic port based on said determined changes.

公开(公告)号：US20180040323A1

公开(公告)日：2018-02-08

申请号：US15666280

申请日：2017-08-01

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  John Laurence MELANSON

IPC: G10L17/20 ,  G10L17/02 ,  G10L25/84 ,  G10L17/22 ,  G10L25/90 ,  G10L17/04 ,  G10L25/15

Abstract: This application describes methods and apparatus for speaker recognition. An apparatus according to an embodiment has an analyzer (202) for analyzing each frame of a sequence of frames of audio data (AIN) which correspond to speech sounds uttered by a user to determine at least one characteristic of the speech sound of that frame. An assessment module (203) determines, for each frame of audio data, a contribution indicator of the extent to which the frame of audio data should be used for speaker recognition processing based on the determined characteristic of the speech sound. In this way frames which correspond to speech sounds that are of most use for speaker discrimination may be emphasized and/or frames which correspond to speech sounds that are of least use for speaker discrimination may be de-emphasized.

公开(公告)号：US20180005636A1

公开(公告)日：2018-01-04

申请号：US15538619

申请日：2015-12-22

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  John Laurence MELANSON

IPC: G10L19/00 ,  G10L15/00 ,  G10L25/24 ,  G10L25/78 ,  G10L21/0208 ,  H04R3/00

CPC classification number: G10L19/0019 ,  G10L15/00 ,  G10L19/00 ,  G10L21/0208 ,  G10L25/24 ,  G10L25/78 ,  H04R3/00 ,  H04R2201/003

Abstract: A microphone unit has a transducer, for generating an electrical audio signal from a received acoustic signal; a speech coder, for obtaining compressed speech data from the audio signal; and a digital output, for supplying digital signals representing said compressed speech data. The speech coder may be a lossy speech coder, and may contain a bank of filters with centre frequencies that are non-uniformly spaced, for example mel frequencies.

公开(公告)号：US20160359500A1

公开(公告)日：2016-12-08

申请号：US15243305

申请日：2016-08-22

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  Emmanuel Philippe Christian HARDY

IPC: H03M7/30

CPC classification number: H03M7/30 ,  H03K7/08 ,  H03K9/08 ,  H03M1/18 ,  H03M1/181 ,  H03M1/50 ,  H03M1/504 ,  H03M3/484 ,  H03M2201/00

Abstract: This application relates to analogue-to-digital converters (ADCs). An ADC 200 has a first converter (201) for receiving an analogue input signal (AIN) and outputting a time encode signal (DT), such as a pulse-width-modulated (PWM) signal, based on input signal and a first conversion gain setting (GIN). In some embodiments the first converter has a PWM modulator (401) for generating a PWM signal such that the input signal is encoded by pulse widths that can vary continuously in time. A second converter (202) receives the time encoded signal and outputs a digital output signal (DOUT) based on the time encoded signal (DT) and a second conversion gain setting (GO). The second converter may have a first PWM-to-digital modulator (403). A gain allocation block (204) generates the first and second conversion gain settings based on the time encoded signal (DT). The gain allocation block (204) may have a second PWM-to-digital modulator (203) which may be of lower latency and/or lower resolution that the first PWM-to-digital modulator (403).

公开(公告)号：US20230377602A1

公开(公告)日：2023-11-23

申请号：US18359577

申请日：2023-07-26

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO

IPC: G10L25/66 ,  G16H10/00 ,  A61B7/00

CPC classification number: G10L25/66 ,  G16H10/00 ,  A61B7/003

Abstract: A detected sound signal may comprise speech or non-verbal sounds, and many non-verbal sounds contain health information. If the speech, or a non-verbal sound containing health information, was produced by an enrolled user, data relating to the sound can be stored in a storage element. A system also comprises a data modification block, for obfuscating received data to provide an obfuscated version of the stored data. The system then has a first access mechanism, for controlling access to the stored data such that only an authorised user can obtain access to said stored data, and a second access mechanism, for controlling access to said stored data such the second access mechanism only provides access to the obfuscated version of the stored data.

公开(公告)号：US20230289422A1

公开(公告)日：2023-09-14

申请号：US18200746

申请日：2023-05-23

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO

IPC: G06F21/32 ,  G10K11/178 ,  G06F16/23 ,  G06F21/40 ,  G10L17/00

CPC classification number: G06F21/32 ,  G10K11/17823 ,  G06F16/2379 ,  G06F21/40 ,  G10L17/00 ,  G10K2210/3027 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10L17/24

Abstract: 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 successful authentication of the user. The ear model data may be acquired using a personal audio device that generates an acoustic stimulus and detects a measured response. The acquisition of the ear model data may be responsive to a determination that the personal audio device is inserted into or placed adjacent to the user's ear. The acquisition of the ear model data may also be responsive to the determination that the personal audio device has not been removed from or moved away from the user's ear.

公开(公告)号：US20230169158A1

公开(公告)日：2023-06-01

申请号：US18101843

申请日：2023-01-26

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  John FORSYTH

IPC: G06F21/32 ,  G06F3/16 ,  H04R1/10 ,  G10K11/178

CPC classification number: G06F21/32 ,  G06F3/165 ,  H04R1/1041 ,  G10K11/17823 ,  G10K11/1783 ,  G10L25/51

Abstract: The present invention relates to methods, apparatus and systems for audio playback via a personal audio device following a biometric process. A personal audio device may be used to obtain ear model data for authenticating a user via an ear biometric authentication system. Owing to that successful authentication, the electronic device is informed of the person who is listening to audio playback from the device. Thus the device can implement one or more playback settings which are specific to that authorised user.