Bryan J Cook

US Patent:

8649999, Feb 11, 2014

Filed:

Dec 27, 2010

Appl. No.:

12/978956

Inventors:

Hua Sheng - Clarksburg MD, US
Bryan A. Cook - Silver Spring MD, US
Matthew G. Liberty - Gaithersburg MD, US

Assignee:

Hillcrest Laboratories, Inc. - Rockville MD

International Classification:

G01P 5/00

US Classification:

702141, 702 87, 702104

Abstract:

A bias value associated with a sensor, e. g. , a time-varying, non-zero value which is output from a sensor when it is motionless, is estimated using a ZRO-tracking filter which is a combination of a moving-average filter and a Kalman filter having at least one constraint enforced against at least one operating parameter of the Kalman filter. It achieves faster convergence on an estimated bias value and produces less estimate error after convergence. A resultant bias estimate may then be used to compensate the biased output of the sensor in, e. g. , a 3D pointing device.

US Patent:

20110135098, Jun 9, 2011

Filed:

Mar 9, 2009

Appl. No.:

12/920578

Inventors:

Markus Kuhr - Wedemark, DE
Jurgen Peissig - Wedemark, DE
Axel Grell - Wedemark, DE
Gregor Zielinsky - Wedemark, DE
Juha Merimaa - Menlo Park CA, US
Veronique Larcher - Palo Alto CA, US
David Romblom - San Francisco CA, US
Bryan Cook - Silver Spring MD, US
Heiko Zeuner - Bernau Bei Berlin, DE

Assignee:

Sennheiser electronic GmbH & Co. KG - Wedemark
SENNHEISER ELECTRONIC CORPORATION - Old Lyem CT

International Classification:

H04R 5/00
H04R 5/02

US Classification:

381 17, 381309

Abstract:

Method and devices for providing surround audio signals are provided. Surround audio signals are received and are binaurally filtered by at least one filter unit. In some embodiments, the input surround audio signals are also processed by at least one equalizing unit. In those embodiments, the binau-rally filtered signals and the equalized signals are combined to form output signals.

US Patent:

20110227825, Sep 22, 2011

Filed:

Jul 1, 2009

Appl. No.:

13/000889

Inventors:

Matthew G. Liberty - Gaithersburg MD, US
Bryan A. Cook - Silver Spring MD, US
Hua Sheng - Clarksburg MD, US

Assignee:

HILLCREST LABORATORIES, INC. - Rockville MD

International Classification:

G06F 3/033

US Classification:

345158

Abstract:

Systems, devices, methods and software are described for mapping movement or motion of a 3D pointing device into cursor position, e.g., for use in rendering the cursor on a display. Absolute and relative type mapping algorithms are described. Mapping algorithms can be combined to obtain beneficial characteristics from different types of mapping.

US Patent:

20130215019, Aug 22, 2013

Filed:

Jun 3, 2011

Appl. No.:

13/701156

Inventors:

Matthew G. Liberty - Gaithersburg MD, US
Bryan A. Cook - Silver Spring MD, US

Assignee:

Hillcrest Laboratories Inc. - Rockville MD

International Classification:

G06F 3/0346

US Classification:

345157

Abstract:

A forward pointing direction associated with a handheld device is estimated or determined by, for example, calculating a center of rotation of the device. A resultant combined or selected bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.

US Patent:

20220308680, Sep 29, 2022

Filed:

Jun 29, 2020

Appl. No.:

17/618991

Inventors:

- MOUNTAIN VIEW CA, US
Steven FRANCZ - MOUNTAIN VIEW CA, US
Stephen SCHEIREY - MOUNTAIN VIEW CA, US
Chad LUCIEN - MOUNTAIN VIEW CA, US
Friedrich GECK - MOUNTAIN VIEW CA, US
Peter Christopher WOOD - MOUNTAIN VIEW CA, US
Bryan A. COOK - Silver Spring MD, US
Mark TURNER - MOUNTAIN VIEW CA, US

International Classification:

G06F 3/0346
G06F 3/01

Abstract:

Method, apparatus, and systems for roll angle estimation for an input/gesture device (IGD) are disclosed. The method includes estimating a first axis vector of the input/gesture device (IGD) relative to the surface of the mobile device (MD), as a first frame of reference, using readings from a first type of sensor; and estimating the first axis vector of the IDG relative to a different, second frame of reference using a gyroscope integration of readings from the 3-axis gyroscope. The method further includes aligning the first axis vector of the IDG in the first frame of reference with the first axis vector of the IDG in the second frame of reference; minimizing a change in the alignment of the first axis vectors between the first frame of reference and the second frame of reference; and determining the roll angle of the IDG relative to the surface of the MD.

US Patent:

20220299321, Sep 22, 2022

Filed:

Jun 26, 2020

Appl. No.:

17/618996

Inventors:

- MOUNTAIN VIEW CA, US
Yun LI - MOUNTAIN VIEW CA, US
Bryan A. COOK - Silver Spring MD, US

International Classification:

G01C 21/16
G06T 7/269

Abstract:

Methods, apparatus, and systems are provided for calibrating an optical flow (OF) sensor by using an inertial measurement unit (IMU) measurements in a planar robot system.

US Patent:

20220299543, Sep 22, 2022

Filed:

Jun 25, 2020

Appl. No.:

17/618997

Inventors:

- MOUNTAIN VIEW CA, US
Bryan A. COOK - Silver Spring MD, US
Zhanlue ZHAO - MOUNTAIN VIEW CA, US
Yun LI - MOUNTAIN VIEW CA, US

Assignee:

CEVA TECHNOLOGIES, INC. - MOUNTAIN VIEW CA

International Classification:

G01P 21/00
G01C 19/54
G01C 25/00
G01P 3/80
G01P 15/14

Abstract:

A method for calculating a scale factor for a gyroscope can include detecting, by a gyroscope, a physical motion of a robot, detecting, by an optical flow (OF) sensor (and/or camera), one or more image signals including information; and deriving estimates of sensor calibration parameters based on the detected physical motion and the information.

US Patent:

20210095966, Apr 1, 2021

Filed:

Feb 21, 2019

Appl. No.:

16/971120

Inventors:

- MOUNTAIN VIEW CA, US
Bryan A. COOK - SILVER SPRING MD, US
Chao WU - CLARKSVILLE MD, US

International Classification:

G01C 21/20
G01C 17/28
G01C 17/38
G01P 15/08
G01P 15/18
G01C 19/00

Abstract:

Methods, apparatus, and systems directed to calibrating a magnetometer. Among such are methods that use only the horizontal components of magnetometer measurements. Then, planar calibrated magnetic field output measurements can be used in sensor fusion with data from gyroscope(s) and accelerometer(s). In other embodiments, heading information from the planar calibrated magnetic field is fused with the heading calculated from gyroscope integration. Other such methods include any of generating combined information including 6-axis fusion information and magnetometer information; accumulating values for any of a first matrix [T] and a first vector [U] according to the combined information; generating a second matrix [{circumflex over (K)}] according to any of a pseudo-inverse of the first matrix [T] and the first vector [U]; generating any of a scale and skew matrix and an offset according to the first matrix [{circumflex over (K)}]; and calibrating the magnetometer according to any of the scale and skew matrix and the offset.