Using voice signal analysis to identify authorized users of a telephone system
First Claim
1. An apparatus for determining whether at least one of a plurality of users of a telephone line is an authorized user of said telephone line, said apparatus comprising:
- a memory for storing an authorized voice pattern for each of a plurality of authorized users of the telephone line;
a voice segregator for receiving voice information obtained from the telephone line, said voice information corresponding to voice patterns of a plurality of users of the telephone line, said voice segregator segregating said received voice information into a plurality of segregated voice patterns, each said segregated voice pattern corresponding to one of said plurality of users of the telephone line; and
a comparator for receiving said segregated voice patterns from said voice segregator and comparing each said segregated voice pattern to said authorized voice patterns stored in said memory to determine whether one of said plurality of users of the telephone line is an authorized user.
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Accused Products
Abstract
A user transparent telephone fraud detection and prevention system employs speech analysis techniques to determine whether at least one participant in a telephone conversation is an authorized user of the telephone line. A multi-party conversation on a phone line (e.g., a PBX line) is analyzed to separate speech information from noise and then the speech information is separated according to each participant in the conversation. Speech data for each participant is then compared to a library of speech data of authorized users of the system. If a match is found the system determines that the call is authorized. If no match is found the call is determined to be unauthorized and appropriate line control functions are carried out. Examples of the line control functions are: terminating the call; recording the call; disabling the line; intruding into the call and playing noise or a warning message; and intruding into the call to demand identification data from the call participants. The system is also used to verify that a user of a calling card number is an authorized user.
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Citations
25 Claims
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1. An apparatus for determining whether at least one of a plurality of users of a telephone line is an authorized user of said telephone line, said apparatus comprising:
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a memory for storing an authorized voice pattern for each of a plurality of authorized users of the telephone line; a voice segregator for receiving voice information obtained from the telephone line, said voice information corresponding to voice patterns of a plurality of users of the telephone line, said voice segregator segregating said received voice information into a plurality of segregated voice patterns, each said segregated voice pattern corresponding to one of said plurality of users of the telephone line; and a comparator for receiving said segregated voice patterns from said voice segregator and comparing each said segregated voice pattern to said authorized voice patterns stored in said memory to determine whether one of said plurality of users of the telephone line is an authorized user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for determining whether a telephone line is being used by at least one of a plurality of authorized users of the telephone line, said apparatus comprising:
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a memory for storing voice patterns for each of said plurality of authorized users of the telephoning line; means for segregating a live conversation on the telephone line to obtain at least one voice pattern corresponding to one of a plurality of persons engaged in said live conversation; and a comparator tbr receiving said segregated voice pattern and comparing said segregated voice pattern to said stored voice patterns. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for determining whether a telephone line is being used by an authorized user, said method comprising the steps of:
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segregating voice information received from the telephone line into a plurality of voice patterns, each said segregated voice pattern corresponding to a single user of the telephone line; comparing each said segregated voice pattern to at least one stored authorized user voice pattern to obtain a result, each authorized user voice pattern corresponding to a user authorized to use said telephone line; and determining whether the telephone line is being used by an authorized user of said telephone line based on said result. - View Dependent Claims (22, 23, 24, 25)
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Specification