US 4,449,189 A · Personal access control system using speech and face recognition

Abstract

A method and an apparatus are disclosed for identifying an individual through a combination of both speech and face recognition. The voice signature of an interrogated person uttering a key word into a microphone is compared in a pattern matcher with the previously stored voice signature of a known person uttering the same key word to obtain a first similarity score. At the same time, when a key event in the utterance of the key word by the interrogated person occurs, a momentary image of that person's mouth region onto which a grid pattern has been projected is optically recorded and compared with the previously stored corresponding momentary image of the same known person to obtain a second similarity score. The two similarity scores are analyzed to verify that the identity of the interrogated person is that of the known person.

Claims13

Dependent claims

A method for identifying an individual through a combination of speech and face recognition which comprises:

(a) defining a characteristic sequence of features of the voice in response to the utterance of a predetermined key word by the individual to be identified;
(b) forming a momentary image of a voice-utterance varying portion of the individual's face upon the occurrence of a key event in the utterance of the key word;
and
(c) using both the defined sequence of features and the momentary image in order to determine the identity or non-identity of the individual.

1 more element

Apparatus for identifying an individual through a combination of speech and face recognition which comprises:

(a) means for defining a characteristic sequence of features of the voice in response to the utterance of a predetermined key word by the individual to be identified;
(b) means for forming a momentary image of a voice-utterance varying portion of the individual's face upon the occurrence of a key event in the utterance of the key word;
and
(c) identification means connected to both the defining means and the momentary image-forming means for using both the defined sequence of features and the momentary image in order to determine the identity or non-identity of the individual.

1 more element

Dependencies are inferred from the claim text.

Personal access control system using speech and face recognition

Life of this patent

Personal access control system using speech and face recognition

Life of this patent

Abstract

Claims13