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quant_lsp.h
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00001 /* Copyright (C) 2002 Jean-Marc Valin */ 00002 /** 00003 @file quant_lsp.h 00004 @brief LSP vector quantization 00005 */ 00006 /* 00007 Redistribution and use in source and binary forms, with or without 00008 modification, are permitted provided that the following conditions 00009 are met: 00010 00011 - Redistributions of source code must retain the above copyright 00012 notice, this list of conditions and the following disclaimer. 00013 00014 - Redistributions in binary form must reproduce the above copyright 00015 notice, this list of conditions and the following disclaimer in the 00016 documentation and/or other materials provided with the distribution. 00017 00018 - Neither the name of the Xiph.org Foundation nor the names of its 00019 contributors may be used to endorse or promote products derived from 00020 this software without specific prior written permission. 00021 00022 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00023 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00024 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00025 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 00026 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00027 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00028 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00029 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00030 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00031 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00032 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00033 */ 00034 00035 #ifndef QUANT_LSP_H 00036 #define QUANT_LSP_H 00037 00038 #include <speex/speex_bits.h> 00039 #include "misc.h" 00040 00041 #define MAX_LSP_SIZE 20 00042 00043 #define NB_CDBK_SIZE 64 00044 #define NB_CDBK_SIZE_LOW1 64 00045 #define NB_CDBK_SIZE_LOW2 64 00046 #define NB_CDBK_SIZE_HIGH1 64 00047 #define NB_CDBK_SIZE_HIGH2 64 00048 00049 /*Narrowband codebooks*/ 00050 extern const signed char cdbk_nb[]; 00051 extern const signed char cdbk_nb_low1[]; 00052 extern const signed char cdbk_nb_low2[]; 00053 extern const signed char cdbk_nb_high1[]; 00054 extern const signed char cdbk_nb_high2[]; 00055 00056 /* Quantizes narrowband LSPs with 30 bits */ 00057 void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits); 00058 00059 /* Decodes quantized narrowband LSPs */ 00060 void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits); 00061 00062 /* Quantizes low bit-rate narrowband LSPs with 18 bits */ 00063 void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits); 00064 00065 /* Decodes quantized low bit-rate narrowband LSPs */ 00066 void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits); 00067 00068 /* Quantizes high-band LSPs with 12 bits */ 00069 void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits); 00070 00071 /* Decodes high-band LSPs */ 00072 void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits); 00073 00074 #ifdef EPIC_48K 00075 /* Quantizes narrowband LSPs with 14 bits */ 00076 void lsp_quant_48k(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits); 00077 00078 /* Decodes quantized narrowband LSPs (14 bits) */ 00079 void lsp_unquant_48k(spx_lsp_t *lsp, int order, SpeexBits *bits); 00080 #endif 00081 00082 00083 #endif
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