EP0099476A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Identity verification system
Assignee: Toshiba Corp
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Filing: 1983-06-20
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Granted: —
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Expires: 2003-06-20
Abstract
Abstract An input pattern of an individual requesting identity verification, such as a speech pattern, is compared with reference patterns of a plurality of categories in a category recognition unit (33) to recognize the category of the input pattern. A differential pattern corresponding to a difference between the input pattern and the reference pattern of the same category as that of the input pattern is computed by a differential pattern computation unit (35). The differential pattern is verified, in a verification unit, against reference differential patterns registered in a verification data file (31) to perform the identity verification. When the identity verification based on the differential pattern is difficult, a feature vector pattern distinctively representing a feature of the individual is extracted from the differential pattern. The feature vector pattern is verified, by the verification unit (341, against reference feature vector pattern data of the same category registered in the verification data file (31).
Inventors
- 👤 Shoichi Hirai
- 👤 Sadakazu Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 19:28
CPC Classifications
G; G10; G10L; G10L17/00; G10L17/02; G06; G06V; G06V30/00; G06V30/10; G06V30/24; G06V30/248; G06V30/2504; G06V40/00; G06V40/30; G07; G07C; G07C9/00; G07C9/30; G07C9/32; G07C9/37
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
An identity verification system comprising: data filing means (17; 31) for filing reference difference pattern data for identity verification which corresponds to a difference between an input pattern of each of registered persons and a reference pattern of the same category as that of the input pattern; category recognizing means (12, 13; 33) for recognizing the category of an input pattern of a person requesting identity verification by comparing the input pattern of the person with reference patterns of a plurality of categories; difference pattern computing means (15; 35) for computing a difference pattern corresponding to a difference between the input pattern and the reference pattern of the same category as that of the input pattern; and identity verification means (16; 34) for performing the identity verification by verifying the difference pattern against the reference difference pattern data of the same category filed in said data filing means.
Claim 2
Dependent Claim
148 words
An identity verification system comprising: data filing means (17; 31) for filing reference difference pattern data for identity verification which corresponds to a difference between an input pattern of each of registered persons and a reference pattern of the same category as that of the input pattern; category recognizing means (12, 13; 33) for recognizing the category of an input pattern of a person requesting identity verification by comparing the input pattern of the person with reference patterns of a plurality of categories; difference pattern computing means (15; 35) for computing a difference pattern corresponding to a difference between the input pattern and the reference pattern of the same category as that of the input pattern; and identity verification means (16; 34) for performing the identity verification by verifying the difference pattern against the reference difference pattern data of the same category filed in said data filing means.
Claim 3
Dependent Claim
185 words
An identity verification system comprising: data filing means (20; 31) for filing reference feature pattern data for identity verification, which is extracted from a difference pattern corresponding to a difference between an input pattern of each of registered persons and a reference pattern of the same category as that of the input pattern; category recognizing means (12, 13; 33) for recognizing the category of an input pattern of a person requesting identity verification by comparing the input pattern of the person with reference patterns of a plurality of categories; difference pattern computing means (15; 35) for computing a difference pattern corresponding to a difference between the input pattern and the reference pattern of the same category as that of the input pattern; feature vector pattern extraction means (18; 36) for extracting a feature vector pattern peculiar to the person from the computed difference pattern; and identity verification means (19; 34) for performing the identity verification by verifying the feature vector pattern extracted by said feature pattern extraction means against the reference feature vector pattern data of the same category filed in said data filing means.
Claim 4
Dependent Claim
185 words
An identity verification system comprising: data filing means (20; 31) for filing reference feature pattern data for identity verification, which is extracted from a difference pattern corresponding to a difference between an input pattern of each of registered persons and a reference pattern of the same category as that of the input pattern; category recognizing means (12, 13; 33) for recognizing the category of an input pattern of a person requesting identity verification by comparing the input pattern of the person with reference patterns of a plurality of categories; difference pattern computing means (15; 35) for computing a difference pattern corresponding to a difference between the input pattern and the reference pattern of the same category as that of the input pattern; feature vector pattern extraction means (18; 36) for extracting a feature vector pattern peculiar to the person from the computed difference pattern; and identity verification means (19; 34) for performing the identity verification by verifying the feature vector pattern extracted by said feature pattern extraction means against the reference feature vector pattern data of the same category filed in said data filing means.
Claim 5
Dependent Claim
93 words
An identity verification system according to claim 2, characterized in that said data filing means also files the reference difference pattern data corresponding to a difference between the input pattern of each of the registered persons and the reference pattern of the same category as that of the input pattern, and said identity verification means is arranged to perform, in a first stage, the identity verification based on the difference pattern, and, in a second stage, the identity verification based on the feature vector pattern when the first stage identity verification is difficult.
Claim 6
Dependent Claim
22 words
An identity verification system according to claim 2, characterized in that the input pattern and the reference pattern are speech patterns, respectively.
Claim 7
Dependent Claim
21 words
An identity verification system according to claim 2, characterized in that the input pattern and the reference pattern are handwritten patterns.
Claim 8
Dependent Claim
53 words
An identity verification system according to claim 2, characterized in that said category recognizing means comprises memory means (13; 33b) for storing reference pattern data of a plurality of categories, and recognizing means (12; 33a) for recognizing the category of the input pattern by comparing the input pattern with the reference pattern data.
References Cited (Backward Citations)
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