-
11.发明申请公开(公告)号：US20210044906A1
公开(公告)日：2021-02-11
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
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：US20200382109A1
公开(公告)日：2020-12-03
申请号：US16998789
申请日：2020-08-20
Inventor： John Paul LESSO
Abstract: This application relates to time-encoding modulators (TEMs). A TEM (100) receives an input signal (SIN) and outputs a time encoded signal (SPWM). A comparator (101) is located within a forward signal path of a feedback loop of the TEM. Also in the feedback loop are a filter (104) and a delay element (106) for applying a controlled delay. In some embodiments a latching element (101, 302; 106, 402) is located within the forward signal path to synchronise any signal transitions output from the latching element to a received first clock signal. Any signal transitions in the output (SOUT) from the modulator are thus synchronised to the first clock signal. In some embodiments the delay element (106) is a digital delay element which is synchronised to the first clock signal.
-
公开(公告)号：US20200302944A1
公开(公告)日：2020-09-24
申请号：US16893929
申请日：2020-06-05
Inventor： John Paul LESSO
IPC: G10L19/16 , H03M7/30 , G10L19/24 , G10L19/002
Abstract: One aspect of the disclosure provides a device, comprising: an allocation module, for determining one or more metrics of each of a plurality of data streams; a compression module, for compressing each of the plurality of data streams and generating a plurality of compressed data streams, the compression module applying a compression ratio that varies as a function of the metrics determined by the allocation module; and a buffer memory, for storing the plurality of compressed data streams.
-
公开(公告)号：US20200286492A1
公开(公告)日：2020-09-10
申请号：US16880576
申请日：2020-05-21
Inventor： John Paul LESSO
Abstract: This application relates to microphone authentication apparatus for verifying whether or not an audio signal originated at a microphone. The microphone authentication apparatus has a comparison block configured to receive a first signal indicative of one or more spectral parameters of at least part of an audio signal to be verified, and compare the one or more spectral parameters to one or more predetermined characteristic microphone parameters relating to a characteristic resonance associated with an acoustic port of a microphone. The first signal may be an audio signal and the microphone authentication apparatus may have a feature extract module for determining the spectral parameters. Based on the comparison determination block may whether the audio signal originated from a microphone and may send a verification signal to a voice biometric module.
-
公开(公告)号：US20200251526A1
公开(公告)日：2020-08-06
申请号：US16781157
申请日：2020-02-04
Inventor： John Paul LESSO
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.
-
Patent Agency Ranking
公开(公告)号：US20200186927A1
公开(公告)日：2020-06-11
申请号：US16709075
申请日：2019-12-10
Inventor： John Paul LESSO , Mark James MCCLOY-STEVENS , John Bruce BOWLERWELL , Yanto SURYONO , Xin ZHAO , Morgan Timothy PRIOR
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.
-
公开(公告)号：US20200068300A1
公开(公告)日：2020-02-27
申请号：US16668535
申请日：2019-10-30
Inventor： John Paul LESSO
Abstract: Audio circuitry, comprising: a speaker driver operable to drive a speaker based on a speaker signal; a current monitoring unit operable to monitor a speaker current flowing through the speaker and generate a monitor signal indicative of that current; and a microphone signal generator operable, when external sound is incident on the speaker, to generate a microphone signal representative of the external sound based on the monitor signal and the speaker signal.
-
公开(公告)号：US20190228779A1
公开(公告)日：2019-07-25
申请号：US15877660
申请日：2018-01-23
Inventor： John Paul LESSO
Abstract: A method of speaker identification comprises receiving an audio signal representing speech; performing a first voice biometric process on the audio signal to attempt to identify whether the speech is the speech of an enrolled speaker; and, if the first voice biometric process makes an initial determination that the speech is the speech of an enrolled user, performing a second voice biometric process on the audio signal to attempt to identify whether the speech is the speech of the enrolled speaker. The second voice biometric process is selected to be more discriminative than the first voice biometric process.
-
公开(公告)号：US20190228778A1
公开(公告)日：2019-07-25
申请号：US16255390
申请日：2019-01-23
Inventor： John Paul LESSO
Abstract: A method of speaker identification comprises receiving an audio signal representing speech; performing a first voice biometric process on the audio signal to attempt to identify whether the speech is the speech of an enrolled speaker; and, if the first voice biometric process makes an initial determination that the speech is the speech of an enrolled user, performing a second voice biometric process on the audio signal to attempt to identify whether the speech is the speech of the enrolled speaker. The second voice biometric process is selected to be more discriminative than the first voice biometric process.
-
公开(公告)号：US20190130919A1
公开(公告)日：2019-05-02
申请号：US16170717
申请日：2018-10-25
Inventor： John Paul LESSO
IPC: G10L17/06 , G10L21/0232 , G10L25/84 , G10L17/02 , G10L17/22
Abstract: A method of speaker identification, comprises: receiving an audio signal representing speech; removing effects of a channel and/or noise from the received audio signal to obtain a cleaned audio signal; obtaining an average spectrum of at least a part of the cleaned audio signal; and comparing the average spectrum with a long term average speaker model for an enrolled speaker. Based on the comparison, it can be determined whether the speech is the speech of the enrolled speaker.
-
-
-
-
-
-
-
-
-
Search Results
151
records
(took 0.021 seconds)
