pysptk.util.mcepalpha

pysptk.util.mcepalpha(fs, start=0.0, stop=1.0, step=0.001, num_points=1000)[source]

Compute appropriate frequency warping parameter given a sampling frequency

It would be useful to determine alpha parameter in mel-cepstrum analysis.

The code is traslated from https://bitbucket.org/happyalu/mcep_alpha_calc.

Parameters
fsint

Sampling frequency

startfloat

start value that will be passed to numpy.arange. Default is 0.0.

stopfloat

stop value that will be passed to numpy.arange. Default is 1.0.

stepfloat

step value that will be passed to numpy.arange. Default is 0.001.

num_pointsint

Number of points used in approximating mel-scale vectors in fixed- length.

Returns
alphafloat

frequency warping paramter (offen denoted by alpha)