ATTACKS PROJECT

ATTACKS Demonstrator


Actual state

The IDIAP speaker verification application was developed with the Swiss Telecom PTT, the goals were to provide a multilingual demonstrator on speaker verification for the Telecom 95 Meeting at Geneva in October 1995 (organized by ITU). The demonstrator is software based, this imply no special speech processing hardware. The Demonstrator uses 2 level of verification, Text dependent and text independent speaker recognition. The actual demonstrator works on Sun sparc station. The verification process takes about 10s on a Sun sparc station 20 with 4 processors. At the first level the customer is asked to say his code (7 digits) a speech recognition will segment the speech data in order to proceed to a text dependent verification. If this first step fails ( emit a doubtful decision) the speaker is asked to utter a sentence, a text independent verification is performed and the final decision is taken. Actually 3 text dependent verification algorithms are used. All the algorithms are processed in parallel, each algorithm gives a decision and a confidence on its decision. finally these partial decisions are combined to take an accepted, rejected or doubtful decision. In case of doubtful text dependent decision 2 text independent algorithms are processed and the final accepted or rejected decision is taken. Before the customer can access his account, he has to follow an enrolment procedure where he is asked to say 5 times his code and to say 2 sentences.

Future state

Speed improving is the first planed work, in a second step the amelioration of robustness against noise for the verification and the recognition process is planed. Finally the Addition of new verification methods is also planed. This project actually goes on three European projects CAVE, M2VTS, and COST250.