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公开(公告)号：US10810291B2
公开(公告)日：2020-10-20
申请号：US15927824
申请日：2018-03-21
Inventor： John Paul Lesso
Abstract: Embodiments of the disclosure include methods, apparatus and computer programs for detecting the proximity of an ear to an audio device. In one embodiment, the disclosure provides a system for detecting the presence of an ear in proximity to an audio device. The system comprises: an input for obtaining a data signal from the environment of the audio device; and an ear biometric authentication module configured to: compare one or more ear biometric features, extracted from the data signal, to an ear biometric template; and generate a first output indicative of the presence or absence of any ear in proximity to the audio device based on the comparison of the one or more extracted ear biometric features to the ear biometric template.
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公开(公告)号：US10726829B2
公开(公告)日：2020-07-28
申请号：US15907630
申请日：2018-02-28
Inventor： John Paul Lesso
Abstract: A method of speaker recognition comprises receiving an audio signal representing speech. A speaker change detection process is performed on the received audio signal. A trigger phrase detection process is also performed on the received audio signal. On detecting the trigger phrase in the received audio signal, a speaker recognition process is performed on the detected trigger phrase and on any speech preceding the detected trigger phrase and following an immediately preceding speaker change.
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公开(公告)号：US10244331B1
公开(公告)日：2019-03-26
申请号：US15953094
申请日：2018-04-13
Inventor： James Thomas Deas , John Paul Lesso
Abstract: The present disclosure relates to a micro electro-mechanical system (MEMS) device comprising a fixed electrode, a moveable electrode that is moveable with respect to the fixed electrode and an output terminal for outputting a transducer output signal indicative of a capacitance between the fixed electrode and the moveable electrode. A package is provided which houses the fixed electrode and the moveable electrode, the package defining a first volume on a first side of the moveable electrode. The moveable electrode is moveable within the first volume in response to sound or pressure waves incident on the moveable electrode. A power dissipation element is disposed within the package. The power dissipation element is configured to receive a generated stimulus signal and to dissipate heat into the first volume so as to modulate the pressure of air within the first volume in accordance with the received generated stimulus signal.
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公开(公告)号：US10187021B2
公开(公告)日：2019-01-22
申请号：US15629273
申请日：2017-06-21
Inventor： John Paul Lesso
Abstract: An apparatus and method for DC offset compensation. An amplifier receives an input signal (AIN) and provides an amplified output signal (SOUT) and a feedback path provides DC offset compensation. The feedback path comprises at least one voltage controlled oscillator (VCO) and a counter. The VCO provides, over time, a first VCO output signal based on said amplified output signal and a second VCO output signal based on a reference signal (VREF). The counter generates first pulse counts based upon the first VCO output signal and second pulse counts based upon the second VCO output signal and provides a compensation signal based on a comparison of the first and second pulse counts. One voltage controlled oscillator may sequentially receive a signal based on said amplifier output signal and the reference signal from a multiplexer so as to sequentially produce the first and second VCO output signals.
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公开(公告)号：US10070223B2
公开(公告)日：2018-09-04
申请号：US15628057
申请日：2017-06-20
Inventor： John Paul Lesso , Emmanuel Philippe Christian Hardy , James Thomas Deas , Toru Ido
IPC: H04R3/06 , G01D5/244 , G01P15/125 , H04R19/00 , H03M1/06 , H03M3/00 , H04R19/04 , G01D5/24 , G01D3/02 , H04R29/00 , H03M1/12 , G01P15/08
Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path. The monitoring may be performed in an analogue or a digital part of the signal path and in either case the modification may be applied in an analogue or a digital part of the signal path.
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Patent Agency Ranking
公开(公告)号：US10045124B2
公开(公告)日：2018-08-07
申请号：US15380463
申请日：2016-12-15
Inventor： John Paul Lesso , Toru Ido
Abstract: This application describes methods and apparatus for mitigating the effects of crosstalk in multichannel audio. An audio driver circuit (200) for driving first and second audio loads (103) having a common return path (RC), has first and second signal paths (Left and Right). A crosstalk compensation block (205) is configured to add a first compensation signal to the first signal path and add a second compensation signal to the second signal path. The first compensation signal is generated based on the second audio signal and a first compensation function and the second compensation signal is generated based on the first audio signal and a second compensation function. Each of the first and second compensation functions is based on a predetermined impedance value for at least part of the common return path (RH1) and is also based on a determined DC impedance value (ZL, ZR) for one of the first and second audio loads which is modified by a band correction factor (γ). The band correction factor modifies the DC impedance value so it is a better estimate of impedance across the frequency band of interest.
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公开(公告)号：US09716945B2
公开(公告)日：2017-07-25
申请号：US14787052
申请日：2014-04-23
Inventor： John Paul Lesso , Emmanuel Philippe Christian Hardy , James Thomas Deas , Toru Ido
IPC: H04R19/00 , H04R3/06 , G01D5/244 , G01P15/125 , G01D5/24 , H03M1/06 , H03M3/00 , H04R19/04 , H04R29/00 , G01P15/08 , G01D3/02 , H03M1/12
CPC classification number: H04R3/06 , G01D3/02 , G01D5/24 , G01D5/24476 , G01P15/125 , G01P2015/0865 , H03M1/0609 , H03M1/12 , H03M3/352 , H03M3/458 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2201/003 , H04R2499/11
Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path. The monitoring may be performed in an analogue or a digital part of the signal path and in either case the modification may be applied in an analogue or a digital part of the signal path.
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公开(公告)号：US20160126968A1
公开(公告)日：2016-05-05
申请号：US14931332
申请日：2015-11-03
Inventor： John Paul Lesso , Emmanuel Philippe Christian Hardy
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).
Abstract translation: 本申请涉及模拟 - 数字转换器（ADC）。 ADC200具有第一转换器（201），用于接收模拟输入信号（AIN），并输出诸如脉冲宽度调制（PWM）信号的时间编码信号（DT），其基于输入信号和第一转换 增益设置（GIN）。 在一些实施例中，第一转换器具有用于产生PWM信号的PWM调制器（401），使得输入信号由可在时间上连续变化的脉冲宽度编码。 第二转换器（202）接收时间编码信号并基于时间编码信号（DT）和第二转换增益设置（GO）输出数字输出信号（DOUT）。 第二转换器可以具有第一PWM到数字调制器（403）。 增益分配块（204）基于时间编码信号（DT）生成第一和第二转换增益设置。 增益分配块（204）可以具有第二PWM到数字调制器（203），其可以具有第一PWM到数字调制器（403）的较低等待时间和/或更低的分辨率。
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公开(公告)号：US12200946B2
公开(公告)日：2025-01-14
申请号：US18323838
申请日：2023-05-25
Inventor： John Paul Lesso , Gordon James Bates
Abstract: There is described a two-terminal multi-level memristor element synthesised from binary memristors, which is configured to implement a variable resistance based on unary or binary code words. There is further described a circuit such as a synapse circuit implemented using a multi-level memristor element.
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公开(公告)号：US11934506B2
公开(公告)日：2024-03-19
申请号：US17981170
申请日：2022-11-04
Inventor： Thomas Ivan Harvey , John Paul Lesso
CPC classification number: G06F21/32 , G06F3/167 , G06F9/542 , H04R3/04 , H04R2460/01
Abstract: A method for use in a biometric process, comprising: for a first function and a second function, applying an acoustic stimulus to a user's ear; and for the second function: receiving a response signal of a user's ear to the acoustic stimulus; and extracting, from the response signal, one or more features for use in a biometric process, wherein the first function is a function other than to induce the response signal for use in the biometric process.
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