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公开(公告)号：US11693626B2
公开(公告)日：2023-07-04
申请号：US15931860
申请日：2020-05-14
Inventor： John Paul Lesso
CPC classification number: G06F7/523 , G06G7/16 , G06F2207/382
Abstract: The present disclosure relates to a computing system. The computing system comprises a data input configured to receive an input data signal, a computation unit having an input coupled with the data input, the computation unit being operative to apply a weight to a signal received at its input to generate a weighted output signal, and a controller. The controller is configured to monitor a parameter of the input signal and/or a parameter of the output signal and to issue a control signal to the computation unit to control a level of accuracy of the weighted output signal based at least in part on the monitored parameter.
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公开(公告)号：US11689871B2
公开(公告)日：2023-06-27
申请号：US17396974
申请日：2021-08-09
Inventor： John P. Lesso
IPC: H04R29/00
CPC classification number: H04R29/001 , H04R2400/01 , H04R2460/03
Abstract: The disclosure relates in general to on-ear transition detection, and in particular to on-ear transition detection circuitry comprising: a monitoring unit operable to monitor a speaker current flowing through a speaker and/or a speaker voltage induced across the speaker, and to generate a monitor signal indicative of the speaker current and/or the speaker voltage; and an event detector operable to detect a qualifying disturbance in a sensor signal indicative of a qualifying pressure change incident on the speaker caused by the speaker transitioning from an on-ear state to an off-ear state or vice versa, wherein the sensor signal is, or is derived from, the monitor signal.
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公开(公告)号：US11653150B2
公开(公告)日：2023-05-16
申请号：US17516830
申请日：2021-11-02
Inventor： John Paul Lesso , Mark James McCloy-Stevens , John Bruce Bowlerwell , Yanto Suryono , Xin Zhao , Morgan Timothy Prior
CPC classification number: H04R5/04 , H03F3/183 , H03G3/3005 , H04R5/02 , H04R29/001 , H04S1/007 , H03G2201/103
Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.
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公开(公告)号：US10828672B2
公开(公告)日：2020-11-10
申请号：US16369556
申请日：2019-03-29
Inventor： Carl Lennart Ståhl , Emmanuel Marchais , Anthony Stephen Doy , John L. Melanson
Abstract: Driver circuitry for driving an electromechanical load with a drive output signal based on a digital reference signal at a first sample rate, the drive output signal inducing a first electrical quantity at the electromechanical load, the driver circuitry comprising: a function block configured, based on said first electrical quantity, to digitally determine at a second sample rate higher than the first sample rate an adjustment signal indicative of a second electrical quantity which would be induced at a target output impedance of the driver circuitry due to said first electrical quantity; and a driver configured to generate the drive output signal based on the reference signal and the adjustment signal to cause the drive output signal to behave as if an output impedance of the driver circuitry has been adjusted to comprise the target output impedance, wherein the first electrical quantity is a current and the second electrical quantity is a voltage, or vice versa.
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35.发明授权公开(公告)号：US10827265B2
公开(公告)日：2020-11-03
申请号：US16255537
申请日：2019-01-23
Inventor： Ziad Hatab , Jie Su , Kaichow Lau
IPC: H04R3/04 , G10L25/21 , G10L25/18 , H04R3/00 , G10L21/0316
Abstract: A method for processing audio data for output to a transducer may include receiving an audio signal, filtering the audio signal with a fixed filter having fixed filter coefficients to generate a filtered audio signal, and outputting the filtered audio signal to the transducer. The fixed filter coefficients of the fixed filter may be tuned by using a psychoacoustic model of the transducer to determine audibility masking thresholds for a plurality of frequency sub-bands, allocating compensation coefficients to the plurality of frequency sub-bands, and fitting the fixed filter coefficients with the compensation coefficients allocated to the plurality of sub-bands.
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Patent Agency Ranking
公开(公告)号：US10826478B2
公开(公告)日：2020-11-03
申请号：US16735297
申请日：2020-01-06
Inventor： Toru Ido
Abstract: This application relates to digital PWM modulation. A PWM modulator (400, 1100) has a PWM generator (402) configured to receive pulse width data (PWidth) and to output a PWM signal (SPWM) comprising a plurality of repeating PWM cycle periods, in which the duration of any pulse of the PWM signal in each PWM cycle period is based on the pulse width data. The PWM generator is configured to synchronise the PWM cycle periods, and the start and end of any PWM pulse, to a received first clock signal. The PWM generator is operable to generate pulses that have a positional error from a centred position within the PWM cycle period and a pulse position controller (403) is configured to control the position of a pulse in a PWM cycle period so as to at least partly compensate for the positional error of one or more preceding pulses.
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公开(公告)号：US10824265B2
公开(公告)日：2020-11-03
申请号：US16282759
申请日：2019-02-22
Inventor： Edward Veitch Sinnott , Nicholas Jeremy Skinner , Jonathan Taylor , Nigel Burgess
IPC: G06F3/041 , G06F9/451 , G06F1/3231 , G06K9/00
Abstract: An operating method for an electronic device comprising the steps of: monitoring a far-field proximity sensor of the electronic device for far-field detection of a user approach; responsive to said far-field detection, monitoring a near-field proximity sensor of the electronic device for near-field detection of a user approach; and responsive to said far-field detection and/or said near-field detection, providing a visual indication of an interaction zone for the electronic device.
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公开(公告)号：US10812074B2
公开(公告)日：2020-10-20
申请号：US16582528
申请日：2019-09-25
Inventor： Yongjie Cheng , Lei Zhu , Kyehyung Lee
Abstract: In accordance with embodiments of the present disclosure, a system may include a buffer and a switch coupled between the buffer and a voltage supply such that the switch controls a varying voltage at a varying voltage node coupled to the buffer.
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公开(公告)号：US10810990B2
公开(公告)日：2020-10-20
申请号：US16261775
申请日：2019-01-30
Inventor： Gabriel Vogel , Jeffrey Alderson , Ryan A. Hellman , Nitin Kwatra
IPC: G10K11/178
Abstract: An active noise cancellation (ANC) system including a selectable decimation rate decimator that receives an oversampled digital input and has an input that selects the decimation rate, a filter that receives an output of the decimator, and a selectable interpolation rate interpolator that receives an output of the filter and has an input that selects the interpolation rate. The selectable decimation rate decimator and the selectable interpolation rate interpolator operate to provide a selectable sample rate for the filter based on the selected decimation and interpolation rates. The filter may be an anti-noise filter, feedback filter, and/or a filter that models an acoustic transfer function of the ANC system. Rate selection may be static, or dynamically controlled based on battery or ambient noise level. A ratio of the decimation rate and the interpolation rate is fixed independent of the dynamically controlled decimation and interpolation rates.
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公开(公告)号：US10809758B2
公开(公告)日：2020-10-20
申请号：US15926598
申请日：2018-03-20
Inventor： Bruce E. Duewer , Brad Allan Lambert , Michael A. Kost , Marc J. Kobayashi , David Hisky , Vitaliy Kulikov
IPC: G06F1/24 , G06F1/10 , G06F13/38 , G06F1/3215 , G06F1/12 , G06F13/42 , G06F1/3234 , G06F1/08
Abstract: A device may include an input for receiving information communicated from a host to the device and a controller configured to recover a device reference clock on the device, the device reference clock proportional to a host reference clock of the host, when clock signaling from the host to the device is unavailable. The controller may recover the device reference clock by measuring a ratio between the host reference clock and the device reference clock of the device by monitoring, with the device, host start-of-frame markers communicated from the host to the device via the input, creating a recovered reference clock based on the measured ratio, and creating local start-of-frame markers that are phase locked with the host start-of-frame markers based on the recovered reference clock.
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