METHOD AND APPARATUS FOR PREVENTING SPEECH COMPREHENSION BY INTERACTIVE VOICE RESPONSE SYSTEMS
Application 1386/CHE/2005 published 2007-09-14, filed 2005-09-29
A method and apparatus utilizing prosody modification of a speech signal output by a text-to-speech (TTS) system to substantially prevent an interactive voice response (IVR) system from understanding the speech signal without significantly degrading the speech signal with respect to human understanding. The present invention involves modifying the prosody of the speech output signal by using the prosody of the user's response to a prompt. In addition, a randomly generated overlay frequency is used to modify the speech signal to further prevent an IVR system from recognizing the TTS output. The randomly generated frequency may be periodically changed using an overlay timer that changes the random frequency signal at a predetermined intervals.
Applicant
1)AT&T CORP
:32 AVENUE OF AMERICAS NEW YORK, NEW YORK-10013-2412 U.S.A.
Inventor
1)DESIMONE, JOSEPH
International Info
Classification: G10L 7/00
Priority Information
10/957,222 U.S.A. 2004-10-01