Programmer Guide/Command Reference/EVAL/formants

formants

Format tracking algorithm.

Usage:

formants(type, fcd, f0, fmd, dt, kdt, minsd)

Parameters:

type

The type of formant candidate array:

0 - frequencies only. fcd(i,j) = frq of candidate j in frame i

1 - frequencies and amplitudes. fcd(i,2*j) = frq of candidate j in frame i

fcd(i,2*j+1) = mp of candidate j in frame i

fcd

The array of formant candidates, format defined by the argument type.

f0

The f0 vector.

fmd

The formant model parameters:

fmd(i,0) = minimum frequency of formant i

fmd(i,1) = maximum frequency of formant i

fmd(i,2) = maximum frequency slope of formant i (Hz / kdt)

fmd(i,3) = maximum amplitude slope of formant i (dB / kdt)

dt

The hopsize.

kdt

The reference time for the slope values of the model (in seconds). The default is the same as dt.

minsd

The minimum duration of the tracking sections (in seconds). The default is 2 * dt.

Function:

Formant tracking algorithm.

Result:

The formant frequency tracks.

Return Type:

array