-
公开(公告)号：US12142259B2
公开(公告)日：2024-11-12
申请号：US18318269
申请日：2023-05-16
Inventor： John Paul Lesso , Toru Ido
Abstract: A method of detecting live speech comprises: receiving a signal containing speech; obtaining a first component of the received signal in a first frequency band, wherein the first frequency band includes audio frequencies; and obtaining a second component of the received signal in a second frequency band higher than the first frequency band. Then, modulation of the first component of the received signal is detected; modulation of the second component of the received signal is detected; and the modulation of the first component of the received signal and the modulation of the second component of the received signal are compared. It may then be determined that the speech may not be live speech, if the modulation of the first component of the received signal differs from the modulation of the second component of the received signal.
-
公开(公告)号：US11998948B2
公开(公告)日：2024-06-04
申请号：US16921369
申请日：2020-07-06
Inventor： John Paul Lesso , Toru Ido
IPC: B06B1/02
CPC classification number: B06B1/0261 , B06B2201/55
Abstract: The present disclosure relates to driver circuitry for driving a piezoelectric transducer. The circuitry comprises: a power supply; a reservoir capacitance; switch network circuitry; and control circuitry. The control circuitry is configured to control operation of the switch network circuitry so as to charge the reservoir capacitance from the power supply and to transfer charge between the reservoir capacitance and the piezoelectric transducer.
-
3.发明授权公开(公告)号：US11856366B2
公开(公告)日：2023-12-26
申请号：US17079578
申请日：2020-10-26
Inventor： John Paul Lesso , Cedric Andrieu , Calum Cuthill
IPC: H04R23/00 , H04B1/04 , H04B11/00 , H04R3/04 , H03G3/20 , G01S7/52 , G01S7/524 , G01S15/10 , H03G3/00
CPC classification number: H04R23/00 , G01S7/52004 , G01S7/524 , G01S15/10 , H03G3/005 , H03G3/20 , H04B1/04 , H04B11/00 , H04R3/04 , H04R2420/01 , H04R2499/11
Abstract: Driver circuitry is disclosed for driving an electroacoustic transducer to provide an output comprising both ultrasonic and audio signal components. The driver circuitry comprises an adjustment module configured to reduce the level of said ultrasonic component signal in response to an increase in an operational variable indicative of a level of said audio signal component, while also increasing the pulse duration, duty cycle, repetition frequency or frequency span or bandwidth of the ultrasonic component.
-
公开(公告)号：US11829461B2
公开(公告)日：2023-11-28
申请号：US18101843
申请日：2023-01-26
Inventor： John Paul Lesso , John Forsyth
CPC classification number: G06F21/32 , G06F3/165 , G10K11/1783 , G10K11/17823 , H04R1/1041 , G10K2210/1081 , G10K2210/3055 , G10L25/51 , H04R1/028 , H04R29/00
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.
-
公开(公告)号：US11804813B2
公开(公告)日：2023-10-31
申请号：US17386287
申请日：2021-07-27
Inventor： John Paul Lesso , Toru Ido
CPC classification number: H03G3/3089 , H03F1/26 , H03F1/32 , H03F1/34 , H03F3/187 , H03F3/217 , H03F3/2175 , H03G7/002 , H03G7/007 , H03F3/2171 , H03F3/2173 , H03F2200/102 , H03F2200/339 , H03F2200/432
Abstract: This application relates to Class D amplifier circuits. A modulator controls a Class D output stage based on a modulator input signal (Dm) to generate an output signal (Vout) which is representative of an input signal (Din). An error block, which may comprise an ADC, generates an error signal (ε) from the output signal and the input signal. In various embodiments the extent to which the error signal (ε) contributes to the modulator input signal (Dm) is variable based on an indication of the amplitude of the input signal (Din). The error signal may be received at a first input of a signal selector block. The input signal may be received at a second input of the signal selector block. The signal selector block may be operable in first and second modes of operation, wherein in the first mode the modulator input signal is based at least in part on the error signal; and in the second mode the modulator input signal is based on the digital input signal and is independent of the error signal. The error signal can be used to reduce distortion at high signal levels but is not used at low signal levels and so the noise floor at low signal levels does not depend on the component of the error block.
-
Patent Agency Ranking
公开(公告)号：US11790220B2
公开(公告)日：2023-10-17
申请号：US18089020
申请日：2022-12-27
Inventor： John Paul Lesso
Abstract: The present disclosure relates to a neuron for an artificial neural network. The neuron comprises a dot product engine operative to: receive a set of weights; receive a set of data inputs based on a set of input data signals; and calculate the dot product of the set of data inputs and the set of weights to generate a dot product engine output. The neuron further comprises an activation function module arranged to apply an activation function to a signal indicative of the dot product engine output to generate a neuron output; and gain control circuitry. The gain control circuitry is operative to control: an input gain applied to the input data signals to generate the set of data inputs; and an output gain applied to the dot product engine output or by the activation function module. The output gain is selected to compensate for the applied input gain.
-
公开(公告)号：US11748462B2
公开(公告)日：2023-09-05
申请号：US17113917
申请日：2020-12-07
Inventor： John Paul Lesso
CPC classification number: G06F21/32 , G10L15/1815 , G10L15/22 , G10L15/30
Abstract: A method for authenticating a user of an electronic device is disclosed. The method comprises: responsive to detection of a trigger event indicative of a user interaction with the electronic device, generating an audio probe signal to play through an audio transducer of the electronic device; receiving a first audio signal comprising a response of the user's ear to the audio probe signal; receiving a second audio signal comprising speech of the user; and applying an ear biometric algorithm to the first audio signal and a voice biometric algorithm to the second audio signal to authenticate the user as an authorised user.
-
公开(公告)号：US11735191B2
公开(公告)日：2023-08-22
申请号：US16451517
申请日：2019-06-25
Inventor： John Paul Lesso , John Laurence Melanson
CPC classification number: G10L17/20 , G10L17/02 , G10L17/04 , G10L17/22 , G10L25/15 , G10L25/84 , G10L25/90
Abstract: This application describes methods and apparatus for speaker recognition. An apparatus according to an embodiment has an analyzer for analyzing each frame of a sequence of frames of audio data 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 determines, for each frame of audio data, a contribution indicator of the extent to which that frame of audio data should be used for speaker recognition processing based on the determined characteristic of the speech sound. Said contribution indicator comprises a weighting to be applied to each frame in the speaker recognition processing. 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：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.
-
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.
-
-
-
-
-
-
-
-
-
Search Results
160
records
(took 0.065 seconds)
