US Patent 7372770 Ultrasonic Doppler sensor for speech-based user interface

Patent 7372770 was granted and assigned to Mitsubishi Electric Research Laboratories on May, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Mitsubishi Electric Research Laboratories

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73727700

Patent Inventor Names

Bhiksha Ramakrishnan0

Kaustubh Kalgaonkar0

Date of Patent

May 13, 2008

Patent Application Number

115193720

Date Filed

September 12, 2006

Patent Primary Examiner

‌

Dan Pihulic

Patent 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.