38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
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/*---------------------------------------------------------------------------*\
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FILE........: lsp.c
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AUTHOR......: David Rowe
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DATE CREATED: 24/2/93
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This file contains functions for LPC to LSP conversion and LSP to
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LPC conversion. Note that the LSP coefficients are not in radians
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format but in the x domain of the unit circle.
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2009 David Rowe
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __LSP__
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#define __LSP__
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int lpc_to_lsp (float *a, int lpcrdr, float *freq, int nb, float delta);
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void lsp_to_lpc(float *freq, float *ak, int lpcrdr);
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#endif
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