InSTIL/ICALL 2004 Symposium on Computer Assisted Learning June 17-19, 2004 Venice, Italy

Efficient Non-Uniform Time-Scaling of Speech with WSOLA for CALL Applications

M. Demol (1), K. Struyve (2), W. Verhelst (1), H. Paulussen (3), P. Desmet (3), P. Verhoeve (2)

(1) Laboratory for Speech and Audio Processing, Department of Electronics and Information Processing Interdisciplinary Institute for Broadband Technology, Vrije Universiteit Brussel, Belgium Interdisciplinary Institute for Broadband Technology, Vrije Universiteit Brussel, Belgium
(2) Central R&D Department, TELEVIC nv, Belgium
(3) ALT - Research Centre on CALL, Depart. of Linguistics, K.U.Leuven - KULAK, Belgium

We consider the applicability of time-scaling for Computer Assisted Language Learning Applications (CALL) and present an efficient algorithm for non-uniform time-scaling. Formal listening tests show a general preference for this non-uniform time-scaling and indicate a dependence of this preference on such factors as the length of the utterance and the desired amount of time-scaling.

Full Paper

Bibliographic reference.  Demol, M. / Struyve, K. / Verhelst, W. / Paulussen, H. / Desmet, P. / Verhoeve, P. (2004): "Efficient non-uniform time-scaling of speech with WSOLA for CALL applications", In ICALL-2004, paper 007.