Sixth International Conference on Spoken Language Processing
(ICSLP 2000)

Beijing, China
October 16-20, 2000

Application of Speaker Authentication Technology to a Telephone Dialogue System

Leandro Rodríguez Liñares (1), Carmen García Mateo (2)

(1) E.T.S.E. Informática, Campus As Lagoas, Ourense, Spain
(2) E.T.S.E. Telecomunicación, Campus Universitario de Vigo, Spain

TelCorreo is a dialogue system that allows users to manage their e-mail accounts using the telephone. Regarding speech technology, TelCorreo is a highly demanding application, since it needs of state-of-art text-to-speech system, speech recognizer and speaker authentifier. The main features of TelCorreo are described in [1] and [2]. In this paper, we will concentrate on the speaker authentication module.

Presently, there are very few speaker recognition systems working in real-world applications. The reason is that the performance achieved by most of the techniques proposed in the literature dramatically drops for out-of-lab conditions. Realworld conditions raise new issues to be considered and a compromise between performance and feasibility must be achieved.

We studied the problem of how to increase the performance of a speaker authentifier system by combining the outputs of an utterance verifier and a speaker verifier (the former recognizes the actual verbal content of the speech, while the latter uses speaker voice by itself as a way of verifying the identity).

We have developed a speaker authentifier module suitable to be integrated in a real-world dialogue system. In this paper, we describe the main relevant aspects of this module. The rest of this paper is structured as follows. Section 1 introduces TelCorreo and its speaker authentication module. Section 2 explains the module design from the users' point of view, while section 3 presents TelCorreoDB: an experimental frame adequate for testing the speaker authentication technology used in TelCorreo. Section 4 presents the implementation details. Finally, some conclusions and guidelines for further work are included.


  1. L. Rodríguez-Liñares et al.: "TelCorreo: A bilingual e-mail client over the telephone". Accepted for publication in TSD'2000 Proceedings, Brno, Czech Republic (2000).
  2. In a description of the system TelCorreo can be found.

Full Paper

Bibliographic reference.  Rodríguez_Liñares, Leandro / García_Mateo, Carmen (2000): "Application of speaker authentication technology to a telephone dialogue system", In ICSLP-2000, vol.2, 226-229.