Voice verification circuit for validating the identity of telephone calling card customers
US5216720A · kind A · utility
44Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Apr 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L17/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for verifying the identity of an unknown user of a telephone calling card service is disclosed which receives identification information corresponding to a valid user of the service, requests the unknown user to speak an authorization phrase without disclosing the authorization phrase to the unknown user, receives the unknown user's speech signal in response to the request, and verifies the identity of the unknown user based on the received speech signal. Other apparatus, systems, and methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.