Time-Scale Modification of Speech Using a Synchronised and Adaptive Overlap-add (SAOLA) Algorithm

Authors

David Dorran, Technological University DublinFollow
Robert Lawlor, National University of Ireland, Maynooth
Eugene Coyle, Technological University DublinFollow

Document Type

Conference Paper

Rights

This item is available under a Creative Commons License for non-commercial use only

Publication Details

in 114th. Audio Engineering Society Convention, paper#5834, Amsterdam, the Netherlands, 2003.

Abstract

The synchonised overlap-add (SOLA) algorithm is a commercially popular and considerably researched audio time-scale modification technique. It operates in the time domain and uses a correlation technique to ensure that synthesis frames overlap in a synchronous manner. We present a modification to SOLA that allows the analysis step size adapt to the desired time-scale factor. The synchronised and adaptive overlap-add (SAOLA) alogorithm improves upon the output quality of SOLA for high time-scale factors and reduces the computational requirements for low time-scale factors. However, the computational requirements for high time-scale factors are increased.

Recommended Citation

Dorran, D., Lawlor, R. & Coyle, E. (2003) Time-scale modification of speech using a synchronised and adaptive overlap-add (SAOLA) algorithm. 114th. Audio Engineering Society Convention, paper#5834, Amsterdam, the Netherlands, 2003.