Patent US5761329A successfully refreshed from Google Patents.
US5761329A
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Method and apparatus employing audio and video data from an individual for authentication purposes
Assignee: AT&T Inc
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Filing: 1995-12-15
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Granted: 1998-06-02
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Expires: 2015-12-15
Abstract
Abstract A method and apparatus is provided for determining the authenticity of an individual. In accordance with the method, audio and video data of the individual speaking at least one selected phrase is obtained. Identifying audio features and video features are then extracted from the audio data and the video data, respectively. A feature vector is formed which incorporates both the audio features and the video features. The feature vector is compared to a stored feature vector of a validated user speaking the same selected phrase. The individual is authenticated if the feature vector and the stored feature vector form a match within a prescribed threshold.
Inventors
- 👤 Tsuhan Chen
- 👤 Mehmet Reha Civanlar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:37
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/30; G07C9/32; G07C9/37; G06; G06F; G06F18/00; G06F18/20; G06F18/25; G06F18/254; G06F18/256; G06V; G06V10/00; G06V10/70; G06V10/77; G06V10/80; G06V10/809; G06V10/811; G06V40/00; G06V40/70
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
124 words
A method for determining authenticity of an individual, said method comprising the steps of: obtaining audio data of the individual speaking at least one selected phrase; obtaining video data of the individual speaking said at least one selected phrase; extracting identifying audio features and video features from said audio data and said video data, respectively, said audio and video features including temporal variations in said audio data and video data, respectively; forming a feature vector that incorporates said audio features and said video features; comparing said feature vector to a stored feature vector of a validated user speaking said at least one selected phrase; and authenticating said individual if said feature vector and said stored feature vector form a match within a presecribed threshold.
Claim 2
Independent Claim
124 words
A method for determining authenticity of an individual, said method comprising the steps of: obtaining audio data of the individual speaking at least one selected phrase; obtaining video data of the individual speaking said at least one selected phrase; extracting identifying audio features and video features from said audio data and said video data, respectively, said audio and video features including temporal variations in said audio data and video data, respectively; forming a feature vector that incorporates said audio features and said video features; comparing said feature vector to a stored feature vector of a validated user speaking said at least one selected phrase; and authenticating said individual if said feature vector and said stored feature vector form a match within a presecribed threshold.
Claim 3
Dependent Claim
18 words
The method of claim 1 further comprising the step of prompting the individual to speak a predetermined password.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said password is selected by the individual.
Claim 5
Dependent Claim
36 words
The method of claim 1 wherein the step of extracting identifying audio features comprises the step of extracting variations in distance among a plurality of points on lips of the individual over a period of time.
Claim 6
Dependent Claim
31 words
The method of claim 4 wherein said plurality of points include two points on corners of the lips, two points on an upper lip and two points on a lower lip.
Claim 7
Dependent Claim
17 words
The method of claim 1 wherein the step of extracting identifying video features employs a mouth model.
Claim 8
Dependent Claim
17 words
The method of claim 6 wherein the step of extracting identifying audio features employs LPC cepstrum coefficients.
Claim 9
Dependent Claim
21 words
The method of claim 7 wherein the step of comparing said feature vector to a stored feature vector employs time-warped mapping.
Claim 10
Dependent Claim
13 words
The method of claim 6 wherein said mouth model employs model-based audiovisual coding.
Claim 11
Dependent Claim
17 words
The method of claim 1 wherein the step of extracting identifying audio features employs LPC cepstrum coefficients.
Claim 12
Dependent Claim
21 words
The method of claim 1 wherein the step of comparing said feature vector to a stored feature vector employs time-warped mapping.
Claim 13
Dependent Claim
22 words
The method of claim 1 wherein the step of obtaining video data includes the step of displaying a previously stored facial template.
Claim 14
Independent Claim
15 words
The method of 12 wherein said monitor displays a mirror image of the facial template.
Claim 15
Independent Claim
15 words
The method of 12 wherein said monitor displays a mirror image of the facial template.
Claim 16
Independent Claim
109 words
An apparatus for determining authenticity of an individual, comprising: means for obtaining audio data and video data of the individual speaking at least one selected phrase; means for extracting identifying audio features and video features from said audio data and said video data, respectively, said audio and video features including temporal variations in said audio data and video data, respectively; means for forming a feature vector that incorporates said audio features and said video features; and means for comparing said feature vector to a stored feature vector of a validated user speaking said at least one selected phrase to determine if a match is formed above a prescribed threshold.
Claim 17
Independent Claim
109 words
An apparatus for determining authenticity of an individual, comprising: means for obtaining audio data and video data of the individual speaking at least one selected phrase; means for extracting identifying audio features and video features from said audio data and said video data, respectively, said audio and video features including temporal variations in said audio data and video data, respectively; means for forming a feature vector that incorporates said audio features and said video features; and means for comparing said feature vector to a stored feature vector of a validated user speaking said at least one selected phrase to determine if a match is formed above a prescribed threshold.
Claim 18
Dependent Claim
20 words
The apparatus of claim 14 wherein said means for obtaining audio data and video data is a camera and microphone.
Claim 19
Dependent Claim
20 words
The apparatus of claim 14 wherein said forming means and said comparing means is geographically remote from said extracting means.
Claim 20
Dependent Claim
14 words
The apparatus of claim 16 wherein said extracting means is a data input terminal.
Claim 21
Dependent Claim
28 words
The apparatus of claim 16 wherein said extracting means is a client and said forming means and said comparing means is a server in communication with said client.
Claim 22
Dependent Claim
19 words
The apparatus of claim 14 wherein said forming means and comparing means is geographically co-located with said extracting means.
Claim 23
Dependent Claim
20 words
The apparatus of claim 19 wherein said forming means, said comparing means and said extracting means employ a common processor.
Claim 24
Dependent Claim
23 words
The apparatus of claim 14 wherein said means for obtaining audio and video data includes a monitor on which the individual is observable.
Claim 25
Dependent Claim
14 words
The apparatus of claim 21 wherein said monitor displays a previously stored facial template.
Claim 26
Dependent Claim
16 words
The apparatus of claim 22 wherein said monitor displays a mirror image of the facial template.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |