Patents by Inventor John Laurence Melanson

John Laurence Melanson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10726849
    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.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: July 28, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, John Laurence Melanson
  • Patent number: 10645495
    Abstract: This application relates to methods and apparatus for digital microphones. Disclosed is a digital microphone apparatus (300) for outputting a digital output signal (DATA) at a sample rate defined by a received clock signal (CLK). The apparatus includes a band splitter (302) configured to receive a microphone signal (SMD) indicative of an output of a microphone transducer and split said microphone signal into first signal path (SP1) for frequencies in a first band and a second signal path (SP2) for frequencies in a second band, the frequencies of the second band being higher than the frequencies in the first band. A modulation block (304) is configured to operate on the second signal path to down-convert signals in the second signal path from the second frequency band to a lower frequency band.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: May 5, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, John Laurence Melanson
  • Publication number: 20190318745
    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.
    Type: Application
    Filed: June 25, 2019
    Publication date: October 17, 2019
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, John Laurence MELANSON
  • Publication number: 20190259400
    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.
    Type: Application
    Filed: April 10, 2019
    Publication date: August 22, 2019
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, John Laurence MELANSON
  • Publication number: 20190261085
    Abstract: This application relates to methods and apparatus for digital microphones. Disclosed is a digital microphone apparatus (300) for outputting a digital output signal (DATA) at a sample rate defined by a received clock signal (CLK). The apparatus includes a band splitter (302) configured to receive a microphone signal (SMD) indicative of an output of a microphone transducer and split said microphone signal into first signal path (SP1) for frequencies in a first band and a second signal path (SP2) for frequencies in a second band, the frequencies of the second band being higher than the frequencies in the first band. A modulation block (304) is configured to operate on the second signal path to down-convert signals in the second signal path from the second frequency band to a lower frequency band.
    Type: Application
    Filed: March 1, 2019
    Publication date: August 22, 2019
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, John Laurence MELANSON
  • Patent number: 10313792
    Abstract: This application relates to methods and apparatus for digital microphones. Disclosed is a digital microphone apparatus (300) for outputting a digital output signal (DATA) at a sample rate defined by a received clock signal (CLK). The apparatus includes a band splitter (302) configured to receive a microphone signal (SMD) indicative of an output of a microphone transducer and split said microphone signal into first signal path (SP1) for frequencies in a first band and a second signal path (SP2) for frequencies in a second band, the frequencies of the second band being higher than the frequencies in the first band. A modulation block (304) is configured to operate on the second signal path to apply a selective gain modulation to signals in the second signal path.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: June 4, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, John Laurence Melanson
  • Patent number: 10297258
    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 center frequencies that are non-uniformly spaced, for example mel frequencies.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: May 21, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, John Laurence Melanson
  • Patent number: 10257612
    Abstract: This application relates to methods and apparatus for digital microphones. Disclosed is a digital microphone apparatus (300) for outputting a digital output signal (DATA) at a sample rate defined by a received clock signal (CLK). The apparatus includes a band splitter (302) configured to receive a microphone signal (SMD) indicative of an output of a microphone transducer and split said microphone signal into first signal path (SP1) for frequencies in a first band and a second signal path (SP2) for frequencies in a second band, the frequencies of the second band being higher than the frequencies in the first band. A modulation block (304) is configured to operate on the second signal path to down-convert signals in the second signal path from the second frequency band to a lower frequency band.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: April 9, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, John Laurence Melanson
  • Publication number: 20180040325
    Abstract: This application describes methods and apparatus for generating a prompt to be presented to a user for the user to vocalise as part of speaker recognition. An apparatus according to an embodiment has a selector for selecting at least one vocal prompt element to form at least part of said prompt from a predetermined set of a plurality of vocal prompt elements. The selector is configured to select the vocal prompt element based, at least partly, on an indication of the operating conditions for the biometric speaker recognition, for example background noise. The prompt is selected to be one which will provide a good likelihood of discrimination between users when vocalised and used for speaker recognition in the current operating conditions. The prompt may be issued as part of a verification process for an existing user or an enrolment process for an enrolling user.
    Type: Application
    Filed: August 1, 2017
    Publication date: February 8, 2018
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Laurence MELANSON, John Paul LESSO
  • Publication number: 20180040323
    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.
    Type: Application
    Filed: August 1, 2017
    Publication date: February 8, 2018
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, John Laurence MELANSON
  • Publication number: 20180005636
    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.
    Type: Application
    Filed: December 22, 2015
    Publication date: January 4, 2018
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, John Laurence MELANSON
  • Publication number: 20170251302
    Abstract: This application relates to methods and apparatus for digital microphones. Disclosed is a digital microphone apparatus (300) for outputting a digital output signal (DATA) at a sample rate defined by a received clock signal (CLK). The apparatus includes a band splitter (302) configured to receive a microphone signal (SMD) indicative of an output of a microphone transducer and split said microphone signal into first signal path (SP1) for frequencies in a first band and a second signal path (SP2) for frequencies in a second band, the frequencies of the second band being higher than the frequencies in the first band. A modulation block (304) is configured to operate on the second signal path to down-convert signals in the second signal path from the second frequency band to a lower frequency band.
    Type: Application
    Filed: February 22, 2017
    Publication date: August 31, 2017
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, John Laurence MELANSON
  • Publication number: 20170251303
    Abstract: This application relates to methods and apparatus for digital microphones. Disclosed is a digital microphone apparatus (300) for outputting a digital output signal (DATA) at a sample rate defined by a received clock signal (CLK). The apparatus includes a band splitter (302) configured to receive a microphone signal (SMD) indicative of an output of a microphone transducer and split said microphone signal into first signal path (SP1) for frequencies in a first band and a second signal path (SP2) for frequencies in a second band, the frequencies of the second band being higher than the frequencies in the first band. A modulation block (304) is configured to operate on the second signal path to apply a selective gain modulation to signals in the second signal path.
    Type: Application
    Filed: February 22, 2017
    Publication date: August 31, 2017
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, John Laurence MELANSON
  • Patent number: 9425725
    Abstract: Systems and methods of estimating a motor position of a motor are disclosed. One exemplary system and method involve observing motor currents of the motor at two different times. Average motor voltages of the motor are determined between the two different times. Average back electro motive force (BEMF) values of the motor are calculated between the two different times. The BEMF values are in conformity with the observed motor currents and the average motor voltages. Another exemplary system and method for estimating a rotor position of a motor involve a motor position estimator that receives information from the motor and estimates a rotor position for a future time.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: August 23, 2016
    Assignee: CIRRUS LOGIC, INC.
    Inventor: John Laurence Melanson
  • Patent number: 9035587
    Abstract: A system and method of controlling a motor are disclosed. The system comprises a current observer for observing a motor current at a sampling rate and a proportionate-integral controller that provides a proportionate path and an integral path and at least forms part of a proportionate-integral control loop based on the motor current. The current observer observes a motor current of the motor at a sampling rate. The proportionate path calculates, for a present cycle of the sampling rate, a proportionate path term for the proportionate-integral control loop based on the motor current. The system outputs a respective motor output voltage to the motor in conformity with the proportionate path term calculated for the present cycle. In conformity with the motor current, the integral path calculates an integral path term for another respective motor output voltage to be used in a later cycle of the sampling rate.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 19, 2015
    Assignee: Cirrus Logic Inc.
    Inventor: John Laurence Melanson
  • Patent number: 9018851
    Abstract: A light emitting diode (LED) lighting system includes a switching power converter having an input for coupling to an alternating current (AC) power source, an output, and a switch. The LED lighting system also includes an LED lighting subsystem coupled to receive power from the output of the switching power converter. The LED lighting subsystem includes a current source for one or more LEDs, and the current source has a control node and a sense node. The LED lighting system additionally includes a switch state controller coupled to the switching power converter and coupled to the LED lighting subsystem. The switch state controller controls switching of the switch and varies a control current provided to the control node of the current source based on at least a parameter sensed from the sense node.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: April 28, 2015
    Assignee: Cirrus Logic, Inc
    Inventors: John Laurence Melanson, William Draper
  • Publication number: 20140265968
    Abstract: A system and method of controlling a motor are disclosed. The system comprises a current observer for observing a motor current at a sampling rate and a proportionate-integral controller that provides a proportionate path and an integral path and at least forms part of a proportionate-integral control loop based on the motor current. The current observer observes a motor current of the motor at a sampling rate. The proportionate path calculates, for a present cycle of the sampling rate, a proportionate path term for the proportionate-integral control loop based on the motor current. The system outputs a respective motor output voltage to the motor in conformity with the proportionate path term calculated for the present cycle. In conformity with the motor current, the integral path calculates an integral path term for another respective motor output voltage to be used in a later cycle of the sampling rate.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: Cirrus Logic, Inc.
    Inventor: John Laurence Melanson
  • Publication number: 20140239863
    Abstract: Systems and methods of estimating a motor position of a motor are disclosed. One exemplary system and method involve observing motor currents of the motor at two different times. Average motor voltages of the motor are determined between the two different times. Average back electro motive force (BEMF) values of the motor are calculated between the two different times. The BEMF values are in conformity with the observed motor currents and the average motor voltages. Another exemplary system and method for estimating a rotor position of a motor involve a motor position estimator that receives information from the motor and estimates a rotor position for a future time.
    Type: Application
    Filed: February 28, 2013
    Publication date: August 28, 2014
    Applicant: Cirrus Logic, Inc.
    Inventor: John Laurence Melanson
  • Patent number: 8487546
    Abstract: A light emitting diode (LED) lighting system and method are disclosed. The LED lighting system and method include an LED controller to accurately control a current in an LED system. The LED controller includes components to calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle, modulated at a rate of greater than fifty (50) Hz and to utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period. The LED system and method further involve components to compare the actual charge amount to a desired charge amount for the active time period and compensate for a difference between the actual charge amount and the desired charge amount during the future active time period.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: July 16, 2013
    Assignee: Cirrus Logic, Inc.
    Inventor: John Laurence Melanson
  • Publication number: 20120194143
    Abstract: A switching converter controller and method for controlling a switch-mode converter in a hybrid discontinuous conduction mode (DCM)/continuous conduction mode (CCM) mode are disclosed. The hybrid mode involves using double (two) or more switching pulses in a switching period of a control signal for controlling the switch-mode converter. The switching period is defined by a switch on-time duration, a switch off-time duration, and an N number of switching pulses. N is an integer greater than one. An inductor current through the inductor of the switch-mode converter is zero before an initial switching pulse, is zero after a last switching pulse, and is non-zero for all other times within the switching period. The switch-mode-converter controller can be used as a power factor correction controller for a power factor corrector. The switch-mode converter controller can be implemented on a single integrated circuit.
    Type: Application
    Filed: January 16, 2012
    Publication date: August 2, 2012
    Inventor: John Laurence Melanson