[hts-users:02646] delta and delta delta calculation for f0

[Kalu Ogbureke <udo.kalu@xxxxxxxx>]

Hi all,
I need help computing the deltas for f0. These are the formula I used:

delta =0.5(ct+1− ct−1)

 delta delta = ct+1 −2ct+ ct−1

where ct is the current frame, ct+1 the next frame and ct-1 the previous frame. I used  -1e+10 at the unvoiced regions as well as voiced/unvoiced boundaries. The training with only static values went well.

Thanks
Kalu