Hans Jongebloed

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There are very few, if any, published accounts of practical expe­ rience with Speaker Verification as a means to provide secure access to telematics services. Yet, there is no reason to expect that Speaker Verification is very different from speech recogni­ tion, for which many deployed services have shown the need for close and intensive on-line monitoring(More)
There are few operational services that use speaker verification (SV) as a means to provide secure, yet easy to use access. In this paper we describe the first semi-operational service that is offered by KPN Telecom that has been developed within the framework of the LE-4 project PICASSO. We report on the objective and subjective evaluation of a service(More)
This paper addresses diierences between operational speaker veriication (SV) systems and laboratory experiments in terms of performance and methods for measuring performance. It is concluded that operational SV systems need an indication of the quality of newly enrolled speaker models , to decide whether to re-enrol or request more enrolment material. We(More)
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