Inventors:
Jefferson M. Willey - Columbia MD, US
Todd Stephenson - Washington DC, US
Hugh Faust - Huntingtown MD, US
James P. Hansen - Fairfax VA, US
George J. Linde - Accokeek MD, US
Carol Chang - Falls Church VA, US
Justin Nevitt - Bristow VA, US
James A. Ballas - Arlington VA, US
Thomas Herne Crystal - Arlington VA, US
Vincent Michael Stanford - North Potomac MD, US
Jean W. de Graaf - Potomac MD, US
International Classification:
G10L 15/14
G10L 15/04
US Classification:
7042561, 704251, 704E15005, 704E15028
Abstract:
A method for detecting and recognizing speech is provided that remotely detects body motions from a speaker during vocalization with one or more radar sensors. Specifically, the radar sensors include a transmit aperture that transmits one or more waveforms towards the speaker, and each of the waveforms has a distinct wavelength. A receiver aperture is configured to receive the scattered radio frequency energy from the speaker. Doppler signals correlated with the speaker vocalization are extracted with a receiver. Digital signal processors are configured to develop feature vectors utilizing the vocalization Doppler signals, and words associated with the feature vectors are recognized with a word classifier.