tab_lbc.h

一个非常好用的国际标准G。726算法

/*
**
** File:        "tab_lbc.h"
**
** Description:  This file contains extern declarations of the tables used
**               by the SG15 LBC Coder for 6.3/5.3 kbps.
**
*/


/*
    ITU-T G.723 Speech Coder   ANSI-C Source Code     Version 5.00
    copyright (c) 1995, AudioCodes, DSP Group, France Telecom,
    Universite de Sherbrooke.  All rights reserved.
*/


extern Word16   HammingWindowTable[LpcFrame];
extern Word16   BinomialWindowTable[LpcOrder] ;
extern Word16   BandExpTable[LpcOrder] ;
extern Word16   CosineTable[CosineTableSize] ;
extern Word16   LspDcTable[LpcOrder] ;
extern Word16   BandInfoTable[LspQntBands][2] ;
extern Word16   Band0Tb8[LspCbSize*3] ;
extern Word16   Band1Tb8[LspCbSize*3] ;
extern Word16   Band2Tb8[LspCbSize*4] ;
extern Word16  *BandQntTable[LspQntBands] ;
extern Word16   PerFiltZeroTable[LpcOrder] ;
extern Word16   PerFiltPoleTable[LpcOrder] ;
extern Word16   PostFiltZeroTable[LpcOrder] ;
extern Word16   PostFiltPoleTable[LpcOrder];
extern Word16   Nb_puls[4];
extern Word16   FcbkGainTable[NumOfGainLev] ;
extern Word32   MaxPosTable[4] ;
extern Word32   CombinatorialTable[MaxPulseNum][SubFrLen/Sgrid] ;
extern Word16   AcbkGainTable085[85*20] ;
extern Word16   AcbkGainTable170[170*20] ;
extern Word16  *AcbkGainTablePtr[2] ;
extern Word16   LpfConstTable[2] ;
extern Word16   epsi170[170] ;
extern Word16   gain170[170] ;
extern Word16   tabgain170[170];
extern Word16   tabgain85[85];
extern Word16   fact[4];
extern Word32   L_bseg[3];
extern Word16   base[3];