Back to results
US 8,275,622 B2Granted
Ultrasonic doppler sensor for speaker recognition
AssigneeMitsubishi Electric Research Laboratories, Inc.
InventorsBhiksha Raj Ramakrishnan, Kaustubh Kalgaonkar
Life of this patent
Estimating the term…
Abstract
A method and system recognizes an unknown speaker by directing an ultrasonic signal at a face of the unknown speaker. A Doppler signal of the ultrasonic signal is acquired after reflection by the face, and Doppler features are extracted from the reflected Doppler signal. The Doppler features are classified using Doppler models storing the Doppler features and identities of known speakers to recognize and identify the unknown speaker.
Claims16
A method for recognizing an unknown speaker, comprising the steps of:
- directing an ultrasonic signal at a face of an unknown speaker;
- acquiring a Doppler signal of the ultrasonic signal after reflection by the face;
- extracting Doppler features from the reflected Doppler signal;
- and
- classifying the Doppler features using Doppler models storing the Doppler features and identities of known speakers to recognize and identify the unknown speaker, wherein there is one model for each known speaker.
2 more elements
A system for recognizing an unknown speaker, comprising:
- a transmitter configured to direct an ultrasonic signal at a face of a speaker;
- a receiver configured to acquire a Doppler signal after the ultrasonic signal is reflected by the face;
- means for extracting Doppler features from the reflected Doppler signal;
- and
- means for classifying the Doppler features using Doppler models storing the Doppler features and identities of known speakers to recognize and identify the unknown speaker, wherein there is one model for each known speaker.
2 more elements
Dependencies are inferred from the claim text.