ref: 5c4ec3cb6b9cafcc5a953f2176c6069ed02fe4e2
dir: /src/spectral/filterbank_mel.h/
/*
Copyright (C) 2007-2009 Paul Brossier <piem@aubio.org>
and Amaury Hazan <ahazan@iua.upf.edu>
This file is part of aubio.
aubio is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
aubio is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with aubio. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
Mel frequency filter bankd coefficients
Set filter bank coefficients to Mel frequency bands.
The filter coefficients are built according to Malcolm Slaney's Auditory
Toolbox available at http://cobweb.ecn.purdue.edu/~malcolm/interval/1998-010/
(see the file mfcc.m).
*/
#ifndef FILTERBANK_MEL_H
#define FILTERBANK_MEL_H
#ifdef __cplusplus
extern "C"
{
#endif
/** filterbank initialization for mel filters
\param fb filterbank object
\param freqs arbitrary array of boundary frequencies
\param samplerate audio sampling rate
This function computes the coefficients of the filterbank based on the
boundaries found in freqs, in Hz, and using triangular overlapping windows.
*/
void aubio_filterbank_set_mel_coeffs (aubio_filterbank_t * fb,
fvec_t * freqs, smpl_t samplerate);
/** filterbank initialization for Mel filters using Slaney's coefficients
\param fb filterbank object
\param samplerate audio sampling rate
This function fills the filterbank coefficients according to Malcolm Slaney.
*/
void aubio_filterbank_set_mel_coeffs_slaney (aubio_filterbank_t * fb,
smpl_t samplerate);
#ifdef __cplusplus
}
#endif
#endif // FILTERBANK_MEL_H