Title:
THREE-WAY CALL DETECTION USING STEGANOGRAPHY
Document Type and Number:
WIPO Patent Application WO2005025185
Kind Code:
A3
Abstract:
The present invention involves a device that connects to a telephone, either at the line or handset interfaces, and produces a known signal that is steganographically hidden within the user's normal voice signal. Detection equipment, residing at another location, monitors signals on telephone calls and tests for the presence of the hidden signal or data generated by the invention. Once detection is achieved, appropriate action for terminating or recording the call may be taken.
Inventors:
MARTIN THOMAS J (US)
Application Number:
PCT/US2004/025029
Publication Date:
May 26, 2006
Filing Date:
August 04, 2004
Export Citation:
Assignee:
INMATE TELEPHONE INC (US)
MARTIN THOMAS J (US)
MARTIN THOMAS J (US)
International Classes:
H04M3/42; H04M1/663; H04M3/22; H04M11/06; H04M1/665; H04M
Foreign References:
| US5539812A | 1996-07-23 |
Other References:
"NEWTON'S TELECOM DICTIONARY, 18TH EDITION.", February 2002, pages: 168, XP001237276
See also references of EP 1661371A4
See also references of EP 1661371A4
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