libvoipcodecs 0.0.1
lsf.h
1/*
2 * iLBC - a library for the iLBC codec
3 *
4 * lsf.h - The iLBC low bit rate speech codec.
5 *
6 * Adapted by Steve Underwood <steveu@coppice.org> from the reference
7 * iLBC code supplied in RFC3951.
8 *
9 * Original code Copyright (C) The Internet Society (2004).
10 * All changes to produce this version Copyright (C) 2008 by Steve Underwood
11 * All Rights Reserved.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16 *
17 * $Id: lsf.h,v 1.2 2008/03/06 12:27:38 steveu Exp $
18 */
19
20#ifndef __iLBC_LSF_H
21#define __iLBC_LSF_H
22
23void a2lsf(float *freq, /* (o) lsf coefficients */
24 float *a); /* (i) lpc coefficients */
25
26void lsf2a(float *a_coef, /* (o) lpc coefficients */
27 float *freq); /* (i) lsf coefficients */
28
29#endif