Re: Standard Scale Modification Algorithm

[Toth Laszlo <tothl@xxxxxxxxxxxxxxx>]

On Fri, 20 Jul 2007, caitriona martyn wrote:

> Would anyone have an already completed implementation of one of the standard
> scale modification algorithms (perhaps one of the OLA algorithms) as I am
> trying put together a basic Matlab program in order to compress/expand
> speech recordings (phonemes)?

If by scale you mean time-scale, you could try to search for "phase
vocoder". There was a nice summary paper on phase vocoders at some DAFX
conference, along with a Matlab code (It was online, but I don't
known if it is still online; try searching for "TRADITIONAL (?)
IMPLEMENTATIONS OF A PHASE-VOCODER: THE TRICKS OF THE TRADE")

               Laszlo Toth
        Hungarian Academy of Sciences         *
  Research Group on Artificial Intelligence   *   "Failure only begins
     e-mail: tothl@xxxxxxxxxxxxxxx            *    when you stop trying"
     http://www.inf.u-szeged.hu/~tothl        *