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Title: US6078807: Telephony fraud detection using voice recognition techniques
[ Derwent Title ]

Country: US United States of America

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12 pages

Inventor: Dunn, James Michael; Ocean Ridge, FL
Ganek, Alan George; Chappaqua, NY
Stern, Edith Helen; Boca Raton, FL
Willner, Barry Edward; Briarcliff Manor, NY

Assignee: International Business Machines Corporation, Armonk, NY
other patents from INTERNATIONAL BUSINESS MACHINES CORPORATION (280070) (approx. 44,393)
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Published / Filed: 2000-06-20 / 1997-08-26

Application Number: US1997000920025

IPC Code: Advanced: H04M 3/38; H04M 15/00;
IPC-7: H01B 7/00;

ECLA Code: H04M15/47; H04M3/38; H04M15/00; T04M3/38A2; T04M201/40; T04M201/41; T04M203/60C; T04M215/01F;

U.S. Class: Current: 455/410; 455/411; 455/563; 455/565;
Original: 455/410; 455/411; 455/563; 455/565;

Field of Search: 379/88.01,88.02,189 455/410,411,403,404,565,563 704/231,236,240,239,272

Priority Number:
1997-08-26  US1997000920025

Abstract:     A system/method is disclosed for screening telephone system callers, using speaker-dependent text-independent voice recognition, to either prevent excessive fraudulent use of certain telephone system lines (or radio channels) or to selectively restrict classes of service allowed for different users of a common line. The voice recognition process is configured to provide an extent of mismatch indication, between a voice sample taken from a caller immediately using the protected line (or channel) and a recorded reference voice sample, which indication corresponds to the probability that the instant caller is not the same as the person who provided the reference sample. The extent of mismatch indication is compared to a mismatch limit value which can be set to a different magnitude for each call. Different actions are taken depending upon whether the extent of mismatch indication is or is not larger than the limit value. In situations screening for potential fraudulent use of a line/channel, a mismatch indication larger than the set limit is considered representative of possible fraud and further action is taken to either immediately block continuation of the call or to acquire additional information from the caller which can be used to verify authorized usage.

Attorney, Agent or Firm: Lieber, Robert ; Tomlin, Richard A. ;

Primary / Asst. Examiners: Eisenzopf, Reinhard J.; Kincaid, Lester G.

Maintenance Status: E1 Expired  Check current status

INPADOC Legal Status: Show legal status actions

Family: None

First Claim:
Show all 11 claims
What is claimed is:     1. A system for controlling access to a resource comprising:
  • means for storing a reference voice sample of an authorized user of said resource;
  • means for obtaining a "dirty" voice sample from a person seeking access to said resource;
  • means for applying a voice recognition process to said dirty and reference voice samples, to derive an indication therefrom of the extent of mismatch between said samples;
  • means for setting a variable mismatch limit related specifically to conditions pertaining to allowable uses of said resource;
  • means for determining if said derived mismatch indication exceeds said related mismatch limit; a determination that said derived mismatch indication exceeds said related mismatch limit being considered indicative that the person seeking access is probably not said authorized user associated with said reference voice sample, and a determination that said derived mismatch indication does not exceed said related mismatch limit being considered indicative that the person seeking access could be said authorized user;
  • means for utilizing said determination that said derived mismatch indication does not exceed said related mismatch limit for permitting said person seeking access to said resource to have access to said resource; and
  • means for utilizing said determination that said derived mismatch indication exceeds said related mismatch limit for initiating further action to control access to said resource by said person seeking access to said resource.

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Forward References: Show 24 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (24)   |   Backward references (10)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 18pp US4292471  1981-09 Kuhn et al.  U.S. Philips Corporation Method of verifying a speaker
Get PDF - 9pp US4827518  1989-05 Feustel et al.  Bell Communications Research, Inc. Speaker verification system using integrated circuit cards
Get PDF - 7pp US5054083  1991-10 Naik et al.  Texas Instruments Incorporated Voice verification circuit for validating the identity of an unknown person
Get PDF - 21pp US5432816  1995-07 Gozzo  International Business Machines Corporation System and method of robust sequence estimation in the presence of channel mismatch conditions
Get PDF - 25pp US5448760  1995-09 Frederick  Corsair Communications, Inc. Cellular telephone anti-fraud system
Get PDF - 12pp US5574977  1996-11 Joseph et al.  Telefonaktiebolaget LM Ericsson System and method for providing priority access and channel assignment in a cellular telecommunication system
Get PDF - 17pp US5590242  1996-12 Juang et al.  Lucent Technologies Inc. Signal bias removal for robust telephone speech recognition
Get PDF - 8pp US5608784  1997-03 Miller   Method of personnel verification using voice recognition
Get PDF - 15pp US5623539  1997-04 Bassenyemukasa et al.  Lucent Technologies Inc. Using voice signal analysis to identify authorized users of a telephone system
Get PDF - 12pp US5778336  1998-07 Chou et al.  Lucent Technologies Inc. Speech coding and joint data/channel bias estimation using finite state vector quantizer derived from sequential constraints
Foreign References: None

Other Abstract Info: DERABS G2000-531252 DERABS G2000-531252

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