Third European Conference on Speech Communication and Technology

Berlin, Germany
September 22-25, 1993


The Effect of Utterance Length and Content on Speaker-Verifier Performance

M. I. Hannah (1), A. T. Sapeluk (1), Robert I. Damper (2), I. M. Roger (3)

(1) Department of Electronic and Electrical Engineering, Dundee Institute of Technology, Dundee, Scotland
(2) Department of Electronics and Computer Science, University of Southampton, Southampton, England
(3) Technology Development Group, NCR, Dundee, Scotland

Utterance length is known to be an important factor in text-independent speaker verification. Here, we examine the effect of length on speaker separation for text-dependent verification. When both test data and templates are continuous-word strings, separation increases with length with apparent saturation at about 2 seconds. Simulating a possible practical scenario using continuous-word test data and templates formed by concatenating discrete words did not achieve useful separation for the longest tokens, apparently because of word-boundary effects. When test data and templates are discrete-word with matching scores accumulated over the maximum length, however, separation was good.

Keywords: Speaker verification, text-dependent verification, utterance length

Full Paper

Bibliographic reference.  Hannah, M. I. / Sapeluk, A. T. / Damper, Robert I. / Roger, I. M. (1993): "The effect of utterance length and content on speaker-verifier performance", In EUROSPEECH'93, 2299-2302.