Main Page | Class List | Directories | File List | Class Members | File Members

quant_lsp.h

Go to the documentation of this file.
00001 /* Copyright (C) 2002 Jean-Marc Valin 
00002    File: quant_lsp.h
00003    LSP vector quantization
00004 
00005    Redistribution and use in source and binary forms, with or without
00006    modification, are permitted provided that the following conditions
00007    are met:
00008    
00009    - Redistributions of source code must retain the above copyright
00010    notice, this list of conditions and the following disclaimer.
00011    
00012    - Redistributions in binary form must reproduce the above copyright
00013    notice, this list of conditions and the following disclaimer in the
00014    documentation and/or other materials provided with the distribution.
00015    
00016    - Neither the name of the Xiph.org Foundation nor the names of its
00017    contributors may be used to endorse or promote products derived from
00018    this software without specific prior written permission.
00019    
00020    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00021    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00022    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00023    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
00024    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00025    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00026    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031 */
00032 
00033 #ifndef QUANT_LSP_H
00034 #define QUANT_LSP_H
00035 
00036 #include <speex/speex_bits.h>
00037 #include "misc.h"
00038 
00039 #define MAX_LSP_SIZE 20
00040 
00041 #define NB_CDBK_SIZE 64
00042 #define NB_CDBK_SIZE_LOW1 64
00043 #define NB_CDBK_SIZE_LOW2 64
00044 #define NB_CDBK_SIZE_HIGH1 64
00045 #define NB_CDBK_SIZE_HIGH2 64
00046 
00047 /*Narrowband codebooks*/
00048 extern const signed char cdbk_nb[];
00049 extern const signed char cdbk_nb_low1[];
00050 extern const signed char cdbk_nb_low2[];
00051 extern const signed char cdbk_nb_high1[];
00052 extern const signed char cdbk_nb_high2[];
00053 
00054 /* Quantizes narrowband LSPs with 30 bits */
00055 void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00056 
00057 /* Decodes quantized narrowband LSPs */
00058 void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits);
00059 
00060 /* Quantizes low bit-rate narrowband LSPs with 18 bits */
00061 void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00062 
00063 /* Decodes quantized low bit-rate narrowband LSPs */
00064 void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits);
00065 
00066 /* Quantizes high-band LSPs with 12 bits */
00067 void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00068 
00069 /* Decodes high-band LSPs */
00070 void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits);
00071 
00072 #ifdef EPIC_48K
00073 /* Quantizes narrowband LSPs with 14 bits */
00074 void lsp_quant_48k(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00075 
00076 /* Decodes quantized narrowband LSPs (14 bits) */
00077 void lsp_unquant_48k(spx_lsp_t *lsp, int order, SpeexBits *bits);
00078 #endif
00079 
00080 
00081 #endif

Generated on Sun Feb 27 16:36:12 2005 for speex by  doxygen 1.4.1