The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2008
Filed:
Sep. 12, 2006
Applicants:
Bhiksha Ramakrishnan, Watertown, MA (US);
Kaustubh Kalgaonkar, Atlanta, GA (US);
Inventors:
Bhiksha Ramakrishnan, Watertown, MA (US);
Kaustubh Kalgaonkar, Atlanta, GA (US);
Assignee:
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01S 15/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system detect speech activity. An ultrasonic signal is directed at a face of a speaker over time. A Doppler signal of the ultrasonic signal is acquired after reflection by the face. Energy in the Doppler signal is measured over time. The energy over time is compared to a predetermined threshold to detect speech activity of the speaker in a concurrently acquired audio signal.