libilbc
0.0.1
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00001 /* 00002 * iLBC - a library for the iLBC codec 00003 * 00004 * lsf.h - The iLBC low bit rate speech codec. 00005 * 00006 * Adapted by Steve Underwood <steveu@coppice.org> from the reference 00007 * iLBC code supplied in RFC3951. 00008 * 00009 * Original code Copyright (C) The Internet Society (2004). 00010 * All changes to produce this version Copyright (C) 2008 by Steve Underwood 00011 * All Rights Reserved. 00012 * 00013 * This program is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 00016 * 00017 * $Id: lsf.h,v 1.2 2008/03/06 12:27:38 steveu Exp $ 00018 */ 00019 00020 #ifndef __iLBC_LSF_H 00021 #define __iLBC_LSF_H 00022 00023 void a2lsf(float *freq, /* (o) lsf coefficients */ 00024 float *a); /* (i) lpc coefficients */ 00025 00026 void lsf2a(float *a_coef, /* (o) lpc coefficients */ 00027 float *freq); /* (i) lsf coefficients */ 00028 00029 #endif