The synchronised 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) algorithm 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.

Authors: Dorran, David; Lawlor, Robert; Coyle, Eugene
Affiliations: Dublin Institute of Technology, Dublin, Ireland ; National University of Ireland, Maynooth, County Kildare, Ireland(See document for exact affiliation information.)
AES Convention: 114 (March 2003) Paper Number: 5824
Publication Date: March 1, 2003
Subject: Signal Processing

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