spectral/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, fvec_t *freqs, smpl_t samplerate)
	filterbank initialization with triangular and overlapping bands
uint_t	aubio_filterbank_set_mel_coeffs_slaney (aubio_filterbank_t *fb, smpl_t samplerate)
	filterbank initialization for Mel filters using Slaney's coefficients

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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.

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Function Documentation

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://cobweb.ecn.purdue.edu/~malcolm/interval/1998-010/ (see file mfcc.m).

Examples:

spectral/test-filterbank_mel.c.

uint_t aubio_filterbank_set_triangle_bands	(	aubio_filterbank_t *	fb,
		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.