Patents by Inventor David K. Lambert

David K. Lambert 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: 11950050
    Abstract: This disclosure describes an apparatus and method of an embodiment of an invention that is a ceiling tile microphone that includes: a plurality of microphones positioned at predetermined locations and coupled together as a microphone array used for beamforming; a single ceiling tile with an outer surface on the front side of the ceiling tile where the outer surface is acoustically transparent, the microphone array couples to the back side of the single ceiling tile, the microphone array combines with the ceiling tile as a single unit, the single unit is mountable in a drop ceiling in place of a single ceiling tile included in the drop ceiling, all or part of the single unit is in the drop space of the drop ceiling when the single unit is used in a drop ceiling mounting configuration; where the ceiling tile microphone further includes beamforming, acoustic echo cancellation, and auto mixing.
    Type: Grant
    Filed: January 10, 2023
    Date of Patent: April 2, 2024
    Assignee: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Publication number: 20240022668
    Abstract: This disclosure describes a conferencing device with beamforming and echo cancellation that includes: a microphone array that further comprises a plurality of microphones oriented to develop a corresponding plurality of microphone signals; a processor configured to execute the following steps: (1) performing a beamforming operation; (2) performing an acoustic echo cancellation operation; (3) post processing; (4) selecting one or more of the post processed signals for transmission to the far end where a signal selector uses the far end signal as information to inhibit the signal selector from changing the selection of the post processed signals while only the far end signal is active.
    Type: Application
    Filed: August 24, 2023
    Publication date: January 18, 2024
    Applicant: ClearOne, Inc.
    Inventors: Ashutosh Pandey, Darrin T. Thurston, David K. Lambert, Tracy A. Bathurst
  • Patent number: 11831812
    Abstract: This disclosure describes a conferencing device with beamforming and echo cancellation that includes: a microphone array that further comprises a plurality of microphones oriented to develop a corresponding plurality of microphone signals; a processor configured to execute the following steps: (1) performing a beamforming operation to combine the plurality of microphone signals from the microphone array into a plurality of combined signals, (2) performing an acoustic echo cancellation operation on the plurality of combined signals to generate a plurality of combined echo cancelled signals, (3) receiving with a voice activity detector the far end signal as an input, (4) selecting one or more of the combined echo cancelled signals for transmission to the far end where a signal selector uses the far end signal as information to inhibit the signal selector from changing the selection of the combined echo cancelled signals while only the far end signal is active.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: November 28, 2023
    Assignee: ClearOne, Inc.
    Inventors: Ashutosh Pandey, Darrin T. Thurston, David K. Lambert, Tracy A. Bathurst
  • Patent number: 11743639
    Abstract: A beamforming microphone array may be integrated into a wall or ceiling tile as a single unit. The beamforming microphone array includes a plurality of microphones that picks up audio input signals. In addition, the wall or ceiling tile may include an acoustically transparent outer surface on the front side of the tile, and the beamforming microphone array picks up the audio input signals through the outer surface of the tile. The beamforming microphone array may be coupled to the tile as a single unit and may be integrated into the back side of the tile.
    Type: Grant
    Filed: July 14, 2022
    Date of Patent: August 29, 2023
    Assignee: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Patent number: 11743638
    Abstract: A beamforming microphone array may be integrated into a wall or ceiling tile as a single unit. The beamforming microphone array includes a plurality of microphones that picks up audio input signals. In addition, the wall or ceiling tile may include an acoustically transparent outer surface on the front side of the tile, and the beamforming microphone array picks up the audio input signals through the outer surface of the tile. The beamforming microphone array may be coupled to the tile as a single unit and may be integrated into the back side of the tile.
    Type: Grant
    Filed: July 14, 2022
    Date of Patent: August 29, 2023
    Assignee: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Publication number: 20230124859
    Abstract: This disclosure describes a conferencing device with beamforming and echo cancellation that includes: a microphone array that further comprises a plurality of microphones oriented to develop a corresponding plurality of microphone signals; a processor configured to execute the following steps: (1) performing a beamforming operation to combine the plurality of microphone signals from the microphone array into a plurality of combined signals, (2) performing an acoustic echo cancellation operation on the plurality of combined signals to generate a plurality of combined echo cancelled signals, (3) receiving with a voice activity detector the far end signal as an input, (4) selecting one or more of the combined echo cancelled signals for transmission to the far end where a signal selector uses the far end signal as information to inhibit the signal selector from changing the selection of the combined echo cancelled signals while only the far end signal is active.
    Type: Application
    Filed: November 22, 2022
    Publication date: April 20, 2023
    Applicant: ClearOne, Inc.
    Inventors: Ashutosh Pandey, Darrin T. Thurston, David K. Lambert, Tracy A. Bathurst
  • Patent number: 11601749
    Abstract: This disclosure describes a ceiling tile microphone system that includes a plurality of microphones coupled together as a microphone array and used for beamforming processing, one or more separate processing devices that couple to the microphone array, where one or more separate processing devices further include beamforming, acoustic echo cancellation, and adaptive acoustic processing; a single ceiling tile with an outer surface on the front side of the ceiling tile where the outer surface is acoustically transparent, the microphone array combines with the ceiling tile as a single unit, the ceiling tile being mountable in a drop ceiling in place of a ceiling tile included in the drop ceiling; where the system is used in a drop ceiling mounting configuration; where the microphone array couples to the back side of the ceiling tile and all or part of the system is in the drop space of the drop ceiling.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: March 7, 2023
    Assignee: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Patent number: 11539846
    Abstract: This disclosure describes an apparatus and method of an embodiment of an invention that is a conferencing device that includes a microphone array that further comprises a plurality of microphones; a processor configured to execute the following steps: performing a beamforming operation to combine the plurality of microphones into a plurality of combined signals that is greater in number than one and less in number than the plurality of microphone signals, each of the plurality of combined signals corresponding to a different fixed beam; wherein performing the beamforming operation includes applying beamforming weights to the signals from each microphone to achieve a desired pickup pattern that includes a main lobe and sidelobes together with nulls for each fixed beam; performing an acoustic echo cancellation operation generate a plurality of combined echo cancelled signals; and selecting one or more of the combined echo cancelled signals for transmission to the far end.
    Type: Grant
    Filed: February 28, 2021
    Date of Patent: December 27, 2022
    Assignee: ClearOne, Inc.
    Inventors: Ashutosh Pandey, Darrin T. Thurston, David K. Lambert, Tracy A. Bathurst
  • Publication number: 20220353610
    Abstract: A beamforming microphone array may be integrated into a wall or ceiling tile as a single unit. The beamforming microphone array includes a plurality of microphones that picks up audio input signals. In addition, the wall or ceiling tile may include an acoustically transparent outer surface on the front side of the tile, and the beamforming microphone array picks up the audio input signals through the outer surface of the tile. The beamforming microphone array may be coupled to the tile as a single unit and may be integrated into the back side of the tile.
    Type: Application
    Filed: July 14, 2022
    Publication date: November 3, 2022
    Applicant: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Publication number: 20220353609
    Abstract: A beamforming microphone array may be integrated into a wall or ceiling tile as a single unit. The beamforming microphone array includes a plurality of microphones that picks up audio input signals. In addition, the wall or ceiling tile may include an acoustically transparent outer surface on the front side of the tile, and the beamforming microphone array picks up the audio input signals through the outer surface of the tile. The beamforming microphone array may be coupled to the tile as a single unit and may be integrated into the back side of the tile.
    Type: Application
    Filed: July 14, 2022
    Publication date: November 3, 2022
    Applicant: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Patent number: 11303996
    Abstract: This disclosure describes a ceiling tile microphone that includes: a plurality of microphones coupled together as a microphone array used for beamforming, the plurality of microphones are positioned at predetermined locations; a single ceiling tile with an outer surface on the front side of the ceiling tile where the outer surface is acoustically transparent, the microphone array combines with the ceiling tile as a single unit, the ceiling tile being mountable in a drop ceiling in place of a ceiling tile included in the drop ceiling; where the ceiling tile microphone further includes beamforming, acoustic echo cancellation, and auto voice tracking; where the ceiling tile microphone is used in a drop ceiling mounting configuration; where the microphone array couples to the back side of the ceiling tile and all or part of the ceiling tile microphone is in the drop space of the drop ceiling.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: April 12, 2022
    Assignee: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Patent number: 11297420
    Abstract: This disclosure describes a ceiling tile microphone that includes: a plurality of microphones coupled together as a microphone array used for beamforming, the plurality of microphones are positioned at predetermined locations; a single ceiling tile with an outer surface on the front side of the ceiling tile where the outer surface is acoustically transparent, the microphone array combines with the ceiling tile as a single unit, the ceiling tile being mountable in a drop ceiling in place of a ceiling tile included in the drop ceiling; where the ceiling tile microphone further includes beamforming, acoustic echo cancellation, and auto voice tracking; where the ceiling tile microphone is used in a drop ceiling mounting configuration; where the microphone array couples to the back side of the ceiling tile and all or part of the ceiling tile microphone is in the drop space of the drop ceiling.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: April 5, 2022
    Assignee: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Patent number: 11272064
    Abstract: This disclosure describes an apparatus and method of an embodiment of an invention that is a conferencing apparatus. This embodiment of the apparatus/system includes a microphone array that further comprises a plurality of microphones where each microphone is configured to sense acoustic waves and the plurality of microphones are oriented to develop a corresponding plurality of microphone signals; a processor, memory, and storage operably coupled to the microphone array, the processor configured to: perform a beamforming operation; perform an acoustic echo cancellation operation; perform a direction of arrival determination; and select one or more of the combined echo cancelled signals.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: March 8, 2022
    Assignee: ClearOne, Inc.
    Inventors: Ashutosh Pandey, Darrin T. Thurston, David K. Lambert, Tracy A. Bathurst
  • Patent number: 11240597
    Abstract: This disclosure describes a ceiling tile beamforming microphone array system that includes a plurality of microphones coupled together as a microphone array and used for beamforming processing, the plurality of microphones are positioned at predetermined locations that produce audio signals to be used to form a directional pickup pattern; one or more separate processing devices where one of the separate processing devices further includes beamforming processing; a single ceiling tile with an outer surface on the front side of the ceiling tile where the outer surface is acoustically transparent; where the ceiling tile beamforming microphone array system is used in a drop ceiling mounting configuration, where the microphone array couples to the back side of the ceiling tile and all or part of the ceiling tile beamforming microphone array system is in the drop space of the drop ceiling.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: February 1, 2022
    Assignee: ClearOne, Inc.
    Inventors: Derek Graham, David K. Lambert, Michael Braithwaite
  • Patent number: 11240598
    Abstract: This disclosure describes an apparatus and method of an embodiment of an invention that is a band-limited beamforming microphone array with acoustic echo cancellation that includes: a plurality of first microphones configured as a beamforming microphone array to resolve first audio input signals within a first frequency range, the beamforming microphone array includes acoustic echo cancellation; one or more additional microphone(s) configured to resolve second audio input signals within a restricted second frequency range such that the additional microphone(s) are coupled to the beamforming microphone array; augmented beamforming that processes audio signals from the beamforming microphone array and the additional microphone(s).
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: February 1, 2022
    Assignee: ClearOne, Inc.
    Inventors: David K. Lambert, Russell S. Ericksen, Derek L. Graham
  • Patent number: 10728653
    Abstract: This disclosure describes an apparatus and method of an embodiment of an invention that is a ceiling tile microphone. This embodiment of the apparatus includes: a beamforming microphone array that includes beamforming and acoustic echo cancellation, the plurality of microphones of the beamforming microphone array are positioned at predetermined locations, the beamforming microphone array picks up audio input signals; a ceiling tile combined with the beamforming microphone array, the ceiling tile being sized and shaped to be mountable in a drop ceiling in place of at least one of a plurality of ceiling tiles included in the drop ceiling; where the outer surface of the ceiling tile is acoustically transparent.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: July 28, 2020
    Assignee: ClearOne, Inc.
    Inventors: Derek L. Graham, David K. Lambert, Michael Braithwaite
  • Publication number: 20190371353
    Abstract: This disclosure describes an apparatus and method of an embodiment of an invention that is a band-limited beamforming microphone array with acoustic echo cancellation that includes: a plurality of first microphones configured as a beamforming microphone array to resolve first audio input signals within a first frequency range, the beamforming microphone array includes acoustic echo cancellation; one or more additional microphone(s) configured to resolve second audio input signals within a restricted second frequency range such that the additional microphone(s) are coupled to the beamforming microphone array; augmented beamforming that processes audio signals from the beamforming microphone array and the additional microphone(s).
    Type: Application
    Filed: August 9, 2019
    Publication date: December 5, 2019
    Applicant: ClearOne, Inc.
    Inventors: David K. Lambert, Russell S. Ericksen, Derek L. Graham
  • Patent number: 10397697
    Abstract: This disclosure describes a band-limited beamforming microphone array made by the augmenting a beamforming microphone array with non-beamforming microphones. The band-limited beamforming microphone array includes a plurality of first microphones configured as a beamforming microphone array to resolve first audio input signals within a first frequency range. The band-limited array further includes one or more additional microphone configured to resolve second audio input signals within a restricted second frequency range such that the additional microphones are coupled to the beamforming microphone array. In addition, the band-limited array includes augmented beamforming that processes audio signals from the beamforming microphone array and the additional microphone(s), where the augmented beamforming combines the beamformed first audio input signal with the resolved and restricted second audio input signals to create an audio signal within a band-limited frequency range.
    Type: Grant
    Filed: March 5, 2016
    Date of Patent: August 27, 2019
    Assignee: ClerOne Inc.
    Inventors: David K. Lambert, Russell S. Ericksen, Derek L. Graham
  • Patent number: 10254584
    Abstract: A liquid crystal display arrangement for a motor vehicle includes a plurality of light emitting diodes positioned to backlight a liquid crystal display. A plurality of electrical conductors are each electrically connected to, and provide electrical power to, a different respective subset of the light emitting diodes. An electronic controller is electrically coupled to each of the conductors and individually controls conduction of electricity through each of the conductors to thereby change a brightness of at least one of the subsets of the light emitting diodes relative to a brightness of at least one other subset of the light emitting diodes during operation of the motor vehicle.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: April 9, 2019
    Assignee: Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America
    Inventors: Edo Omanovic, Walter Nill, David K. Lambert
  • Publication number: 20180160087
    Abstract: A head up display calibration arrangement includes a substrate associated with a windshield. The substrate has a test pattern. A head up display module projects a test display in association with the windshield. The test display at least partially overlaps the test pattern. The test display is projected dependent upon at least one projection parameter value. A camera captures an image of the test display and the test pattern, and transmits an image signal dependent upon the captured image. An electronic processor is communicatively coupled to each of the camera and the head up display module. The processor receives the image signal and determines from the image signal a positional relationship between the test display and the test pattern within the captured image. The processor modifies the projection parameter value dependent upon the determined positional relationship between the test display and the test pattern within the captured image.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 7, 2018
    Inventors: WALTER JOSEPH NILL, DAVID K. LAMBERT, DEREK DIDIER