David H Lambert

US Patent:

7864937, Jan 4, 2011

Filed:

Jun 2, 2004

Appl. No.:

10/860602

Inventors:

Tracy A. Bathurst - South Jordan UT, US
David Lambert - South Jordan UT, US
Wayne Whiteley - Lindon UT, US
Carrie L. Owen - Layton UT, US

Assignee:

ClearOne Communications, Inc. - Salt Lake City UT

International Classification:

H04M 3/42

US Classification:

37920201, 37920401, 348 1409, 381119

Abstract:

This disclosure describes a method of controlling a multi-pod conferencing system for local conference participants to communicate with remote conference participants. This method includes providing a plurality of pods to local conference participants wherein an individual pod connects to one or more of the plurality of pods through a data communication means. The individual pods further include pod processor means. The pod processor means couples to an input device and a display. The method further includes providing a base unit that couples to the plurality of pods through the data communication means. The base unit further couples to a carrier medium, where the base unit further includes base controller means. The base controller means couples to the converting means. Additionally, the method further includes receiving command input at an individual pod from the local conference participant, updating the display at the individual pod in response to the command input, and distributing the command input through said data communication means to other plurality of pods and the base controller, where the plurality of pods and the base controller interpret the command input and change their operational state if necessary in response to the command input.

US Patent:

7912211, Mar 22, 2011

Filed:

Mar 14, 2007

Appl. No.:

11/686250

Inventors:

David Lambert - South Jordan UT, US

Assignee:

Clearone Communications, Inc. - Salt Lake City UT

International Classification:

H04M 1/00

US Classification:

37940608, 37940611

Abstract:

Disclosed herein are portable teleconferencing products that implement a doubletalk detector in a low frequency range or in a frequency range commensurate with the frequencies through which sound may be efficiently transferred between a speaker and a microphone through an enclosure. Also disclosed herein are teleconferencing systems that implement a secondary doubletalk detector, a non-presumptive doubletalk detector, a confirmatory doubletalk detector, and/or a false doubletalk detector, whereby echo cancellation coefficients may be better adapted after echo path changing events through the use of accelerated coefficient adaptation or half-duplex operation until adaptation is restored. Further disclosed herein are teleconferencing products that include more than one port for communicating with distant parties or a single party and a local source of audio material, whereby one distant party is prevented from being transmitted to it private audio from another party or another audio signal while permitting a local participant to hear the private audio. Detailed information on various example embodiments of the inventions are provided in the Detailed Description below, and the inventions are defined by the appended claims.

US Patent:

7916849, Mar 29, 2011

Filed:

Jun 2, 2004

Appl. No.:

10/859903

Inventors:

Tracy A. Bathurst - South Jordan UT, US
David Lambert - South Jordan UT, US
Wayne Whiteley - Lindon UT, US
Carrie L. Owen - Layton UT, US

Assignee:

Clearone Communications, Inc. - Salt Lake City UT

International Classification:

H04M 3/42
H04R 3/00

US Classification:

37920201, 381 92

Abstract:

This disclosure describes a method of gating a multi-pod conferencing system for local conference participants to communicate with remote conference participants that includes providing a plurality of pods where an individual pod connects to one or more plurality of pods through a data communication means. The individual pods further include: pod processor means, digital to analog converter means, analog to digital converting means, virtual microphone means, pod echo cancellation means, and microphone gating means. The disclosed method further includes providing a base unit that uses data communication means and base controller means. The disclosed method further includes the computed values of the pod gating means being distributed to other pods to gate the pods on and or off.

US Patent:

8019076, Sep 13, 2011

Filed:

Mar 14, 2007

Appl. No.:

11/686266

Inventors:

David Lambert - South Jordan UT, US

Assignee:

Clearone Communications, Inc. - Salt Lake City UT

International Classification:

H04M 9/08

US Classification:

37940608, 370286, 455570

Abstract:

Disclosed herein are portable teleconferencing products that implement a doubletalk detector in a low frequency range or in a frequency range commensurate with the frequencies through which sound may be efficiently transferred between a speaker and a microphone through an enclosure. Also disclosed herein are teleconferencing systems that implement a secondary doubletalk detector, a non-presumptive doubletalk detector, a confirmatory doubletalk detector, and/or a false doubletalk detector, whereby echo cancellation coefficients may be better adapted after echo path changing events through the use of accelerated coefficient adaptation or half-duplex operation until adaptation is restored. Further disclosed herein are teleconferencing products that include more than one port for communicating with distant parties or a single party and a local source of audio material, whereby one distant party is prevented from being transmitted to it private audio from another party or another audio signal while permitting a local participant to hear the private audio. Detailed information on various example embodiments of the inventions are provided in the Detailed Description below, and the inventions are defined by the appended claims.

US Patent:

8027486, Sep 27, 2011

Filed:

Oct 8, 2008

Appl. No.:

12/247757

Inventors:

Ashutosh Pandey - Murray UT, US
David Lambert - South Jordan UT, US

Assignee:

Clearone Communications, Inc. - Salt Lake City UT

International Classification:

H04B 15/00

US Classification:

381 93, 381 942, 381 943, 381 944

Abstract:

Disclosed herein are detectors of audio ringing feedback, that is decaying feedback with a gain of less than one, those detectors utilizing a repeated gain measurement that applied to a range of gain values characteristic of ringing-type feedback. Those gain measurements, while in the range, increase a probability measurement of feedback. When the probability of feedback reaches a threshold, a detection of feedback is made and feedback countermeasures, such as the application of a notch filter, may be applied. Optionally, the audio gain around likely frequencies of feedback may be enhanced for a time to increase the resolution of identification of a feedback frequency, which may be identified through an interpolative method. Repeated gain measurements may also identify building-type feedback. A ringing detector may include more than one range of detection, for example for building, strong-ringing and weak-ringing feedback.

US Patent:

8031853, Oct 4, 2011

Filed:

Jun 2, 2004

Appl. No.:

10/860604

Inventors:

Tracy A. Bathurst - South Jordan UT, US
David Lambert - South Jordan UT, US
Wayne Whiteley - Lindon UT, US
Carrie L. Owen - Layton UT, US

Assignee:

Clearone Communications, Inc. - Salt Lake City UT

International Classification:

H04M 3/42

US Classification:

37920201, 348 141

Abstract:

This disclosure describes a multi-pod conferencing system for local conference participants to communicate with remote conference participants that includes a plurality of pods for local conference participants where an individual pod connects to one or more plurality of pods through a data communication means. The individual pods further include the following: pod processor means; an input device and a display; a loudspeaker that couples to a digital to analog converter; 3 physical bi-polar microphones positioned at 120 degree intervals in the horizontal resting plane of the pod, each individual physical microphone connects to a pair of audio ports with each audio port being equal distance from the loudspeaker, the physical microphones couple to analog to digital converting mean and pod processor means; 3 virtual microphones; pod echo cancellation means; and microphone gating means. The disclosed system further includes a base unit that couples to the plurality of pods through the data communication means. The base unit further includes base controller means, where the base controller means couples to the converting means.

US Patent:

8077857, Dec 13, 2011

Filed:

Mar 14, 2007

Appl. No.:

11/686280

Inventors:

David Lambert - South Jordan UT, US

Assignee:

ClearOne Communications, Inc. - Salt Lake City UT

International Classification:

H04M 9/08

US Classification:

37940602, 37940612

Abstract:

Disclosed herein are portable teleconferencing products that implement a doubletalk detector in a low frequency range or in a frequency range commensurate with the frequencies through which sound may be efficiently transferred between a speaker and a microphone through an enclosure. Also disclosed herein are teleconferencing systems that implement a secondary doubletalk detector, a non-presumptive doubletalk detector, a confirmatory doubletalk detector, and/or a false doubletalk detector, whereby echo cancellation coefficients may be better adapted after echo path changing events through the use of accelerated coefficient adaptation or half-duplex operation until adaptation is restored. Further disclosed herein are teleconferencing products that include more than one port for communicating with distant parties or a single party and a local source of audio material, whereby one distant party is prevented from being transmitted to it private audio from another party or another audio signal while permitting a local participant to hear the private audio. Detailed information on various example embodiments of the inventions are provided in the Detailed Description below, and the inventions are defined by the appended claims.

US Patent:

8090118, Jan 3, 2012

Filed:

Oct 8, 2008

Appl. No.:

12/247768

Inventors:

Ashutosh Pandey - Murray UT, US
David Lambert - South Jordan UT, US

Assignee:

ClearOne Communications, Inc. - Salt Lake City UT

International Classification:

H04B 15/00

US Classification:

381 93, 381 942, 381 943, 381 944

Abstract:

Disclosed herein are detectors of audio ringing feedback, that is decaying feedback with a gain of less than one, those detectors utilizing a repeated gain measurement that applied to a range of gain values characteristic of ringing-type feedback. Those gain measurements, while in the range, increase a probability measurement of feedback. When the probability of feedback reaches a threshold, a detection of feedback is made and feedback countermeasures, such as the application of a notch filter, may be applied. Optionally, the audio gain around likely frequencies of feedback may be enhanced for a time to increase the resolution of identification of a feedback frequency, which may be identified through an interpolative method. Repeated gain measurements may also identify building-type feedback. A ringing detector may include more than one range of detection, for example for building, strong-ringing and weak-ringing feedback.