发明名称 |
SYSTEM AND METHOD FOR DETECTING A RECORDED VOICE |
摘要 |
The present invention is a reliable system and method for detecting a recorded voice, which can be employed independently or to provide protection from fraudulent use of a recording to defeat an automatic speaker recognition system. Several techniques and systems are employed either independently or in combination to verify that a detected audio sample is live and not recorded. Temporal speech characteristics of an audio sample are analyzed to determine whether a sample under examination is so similar to a previous sample as to indicate a recording. Communications channel characteristics are examined to determine whether an sample was recorded on a different channel from a predetermined communications channel. A pattern classifier is trained to distinguish between live and recorded speech. Finally, an "audio watermark" is used to determine whether a detected audio sample is a recording of a previous communication by an authorized user. In addition, the various techniques of the present invention may be employed in serial or parallel combination with a variety of decisionmaking schemes to provide increased performance. |
申请公布号 |
EP0896712(A4) |
申请公布日期 |
2000.01.26 |
申请号 |
EP19980903822 |
申请日期 |
1998.01.29 |
申请人 |
T-NETIX, INC. |
发明人 |
SHARMA, MANISH;MAMMONE, RICHARD, J. |
分类号 |
G07C9/00;G10L15/26;G10L17/00;G10L17/22;G10L17/26;(IPC1-7):G10L9/00 |
主分类号 |
G07C9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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