filterbank_mel.h File Reference

Filterbank object coefficients initialization. More...

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Functions
uint_t	aubio_filterbank_set_triangle_bands (aubio_filterbank_t *fb, const fvec_t *freqs, smpl_t samplerate)
	filterbank initialization with triangular and overlapping bands More...
uint_t	aubio_filterbank_set_mel_coeffs_slaney (aubio_filterbank_t *fb, smpl_t samplerate)
	filterbank initialization for Mel filters using Slaney's coefficients More...

Detailed Description

Filterbank object coefficients initialization.

Functions to create set the aubio_filterbank_t coefficients to

• aubio_filterbank_set_triangle_bands: overlapping triangular bands,
• aubio_filterbank_set_mel_coeffs_slaney: Mel frequency bands.

Definition in file filterbank_mel.h.

Function Documentation

aubio_filterbank_set_mel_coeffs_slaney()

uint_t aubio_filterbank_set_mel_coeffs_slaney	(	aubio_filterbank_t *	fb,
		smpl_t	samplerate
	)

filterbank initialization for Mel filters using Slaney's coefficients

Parameters

fb	filterbank object
samplerate	audio sampling rate

The filter coefficients are built according to Malcolm Slaney's Auditory Toolbox, available at http://engineering.purdue.edu/~malcolm/interval/1998-010/ (see file mfcc.m).

Examples:

spectral/test-filterbank_mel.c.

aubio_filterbank_set_triangle_bands()

uint_t aubio_filterbank_set_triangle_bands	(	aubio_filterbank_t *	fb,
		const fvec_t *	freqs,
		smpl_t	samplerate
	)

filterbank initialization with triangular and overlapping bands

Parameters

fb	filterbank object
freqs	arbitrary array of boundary frequencies
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 bands.