tab2.c

symbian 系统下的g.723 g.723_24实现, 本源码在 series60 sdk fp2下调试通过

/* FILE: "tab2.c" */
/*
    ITU-T G.723.1 Floating Point Speech Coder ANSI C Source Code.  Version 5.1F

    Original fixed-point code copyright (c) 1995,
    AudioCodes, DSP Group, France Telecom, Universite de Sherbrooke.
    All rights reserved.

    Floating-point code copyright (c) 1995,
    Intel Corporation and France Telecom (CNET).
    All rights reserved.
*/

#include "typedef2.h"
#include "cst2.h"
#include "tab2.h"

#define F  FLOAT


/*
**
** File:        tab2.c
**
** Description: Tables used for G.723.1 encoding and decoding
**
** Tables:      HammingWindowTable[180]
**
**              LPC Computation and Filtering
**
**                  BinomialWindowTable[10]
**                  BandExpTable[10]
**
**              LSP calculation and quantization
**
**                  CosineTable[512]
**                  LspDcTable[10]
**                  BandInfoTable[3][2], int
**                  Band0Tb8[256*3]
**                  Band1Tb8[256*3]
**                  Band2Tb8[256*4]
**                  BandQntTable[3], FLOAT*
**
**              Perceptual Filtering and Post Filtering
**
**
**                  PerFiltZeroTable[10]
**                  PerFiltPoleTable[10]
**                  PostFiltZeroTable[10]
**                  PostFiltPoleTable[10]
**                  LpfConstTable[2] (pitch postfilter)
**
**              ACELP or MP-MLQ
**
**                  Nb_puls[4] (MP-MLQ), int
**                  FcbkGainTable[24] (ACELP and MP-MLQ)
**                  MaxPosTable[4]  (MP-MLQ), Word32
**                  CombinatorialTable[6][30] (MP-MLQ), Word32
**                  epsi170[170] (ACELP), int
**                  gain170[170] (ACELP)
**
**              Pitch Prediction
**
**                  AcbkGainTable085[85*20]
**                  AcbkGainTable170[170*20]
**                  AcbkGainTablePtr[2], FLOAT*
**
**              Taming procedure
**
**                  tabgain170[170]
**                  tabgain85[85]
**
**              Comfort Noise Generation
**
**                  fact[4]
**                  bseg[3]
**                  base[3]
**
**              All tables are FLOAT unless separately denoted
*/

/*
**  HammingWindowTable:
**
**  Hamming Window coefficients.
**
*/

FLOAT   HammingWindowTable[LpcFrame] = {
  (F)0.080000,
  (F)0.080283,
  (F)0.081133,
  (F)0.082548,
  (F)0.084527,
  (F)0.087067,
  (F)0.090164,
  (F)0.093816,
  (F)0.098018,
  (F)0.102764,
  (F)0.108049,
  (F)0.113866,
  (F)0.120208,
  (F)0.127067,
  (F)0.134435,
  (F)0.142303,
  (F)0.150660,
  (F)0.159498,
  (F)0.168804,
  (F)0.178567,
  (F)0.188775,
  (F)0.199417,
  (F)0.210478,
  (F)0.221944,
  (F)0.233803,
  (F)0.246039,
  (F)0.258637,
  (F)0.271582,
  (F)0.284857,
  (F)0.298447,
  (F)0.312335,
  (F)0.326502,
  (F)0.340933,
  (F)0.355609,
  (F)0.370513,
  (F)0.385625,
  (F)0.400927,
  (F)0.416401,
  (F)0.432026,
  (F)0.447785,
  (F)0.463658,
  (F)0.479624,
  (F)0.495665,
  (F)0.511761,
  (F)0.527891,
  (F)0.544037,
  (F)0.560177,
  (F)0.576292,
  (F)0.592363,
  (F)0.608369,
  (F)0.624291,
  (F)0.640109,
  (F)0.655804,
  (F)0.671356,
  (F)0.686747,
  (F)0.701956,
  (F)0.716966,
  (F)0.731758,
  (F)0.746314,
  (F)0.760616,
  (F)0.774645,
  (F)0.788386,
  (F)0.801821,
  (F)0.814933,
  (F)0.827706,
  (F)0.840125,
  (F)0.852174,
  (F)0.863839,
  (F)0.875104,
  (F)0.885957,
  (F)0.896384,
  (F)0.906371,
  (F)0.915907,
  (F)0.924980,
  (F)0.933579,
  (F)0.941693,
  (F)0.949312,
  (F)0.956426,
  (F)0.963028,
  (F)0.969109,
  (F)0.974660,
  (F)0.979677,
  (F)0.984151,
  (F)0.988079,
  (F)0.991454,
  (F)0.994273,
  (F)0.996533,
  (F)0.998230,
  (F)0.999363,
  (F)0.999929,
  (F)0.999929,
  (F)0.999363,
  (F)0.998230,
  (F)0.996533,
  (F)0.994273,
  (F)0.991454,
  (F)0.988079,
  (F)0.984151,
  (F)0.979677,
  (F)0.974660,
  (F)0.969109,
  (F)0.963028,
  (F)0.956427,
  (F)0.949312,
  (F)0.941693,
  (F)0.933579,
  (F)0.924980,
  (F)0.915907,
  (F)0.906371,
  (F)0.896384,
  (F)0.885957,
  (F)0.875104,
  (F)0.863839,
  (F)0.852174,
  (F)0.840125,
  (F)0.827706,
  (F)0.814933,
  (F)0.801821,
  (F)0.788386,
  (F)0.774645,
  (F)0.760616,
  (F)0.746314,
  (F)0.731758,
  (F)0.716966,
  (F)0.701956,
  (F)0.686747,
  (F)0.671356,
  (F)0.655804,
  (F)0.640110,
  (F)0.624291,
  (F)0.608369,
  (F)0.592363,
  (F)0.576292,
  (F)0.560177,
  (F)0.544037,
  (F)0.527891,
  (F)0.511761,
  (F)0.495665,
  (F)0.479624,
  (F)0.463658,
  (F)0.447785,
  (F)0.432027,
  (F)0.416401,
  (F)0.400927,
  (F)0.385625,
  (F)0.370513,
  (F)0.355609,
  (F)0.340933,
  (F)0.326502,
  (F)0.312335,
  (F)0.298447,
  (F)0.284857,
  (F)0.271582,
  (F)0.258637,
  (F)0.246039,
  (F)0.233803,
  (F)0.221945,
  (F)0.210478,
  (F)0.199417,
  (F)0.188775,
  (F)0.178567,
  (F)0.168804,
  (F)0.159498,
  (F)0.150660,
  (F)0.142303,
  (F)0.134435,
  (F)0.127067,
  (F)0.120208,
  (F)0.113866,
  (F)0.108049,
  (F)0.102764,
  (F)0.098018,
  (F)0.093816,
  (F)0.090164,
  (F)0.087067,
  (F)0.084527,
  (F)0.082548,
  (F)0.081133,
  (F)0.080283,
  (F)0.080000
 } ;


/*
**  BinomialWindowTable:
**
**  Purpose:
**     Binomial Window coefficients used to weight the autocorrelation before
**     Levinson-Durbin in the LPC coefficient calculation.
**
**
*/

FLOAT BinomialWindowTable[LpcOrder] = {
  (F)0.999443,
  (F)0.997775,
  (F)0.995002,
  (F)0.991132,
  (F)0.986178,
  (F)0.980157,
  (F)0.973088,
  (F)0.964995,
  (F)0.955905,
  (F)0.945847
  } ;

/*
**  BandExpTable:
**
**  Purpose:
**      Do bandwidth expansion on the LPC coefficients by scaling the
**      poles of the LPC synthesis filter by a factor of 0.994

**
**  Table Structure:
**      Table values correspond to (0.994) to the power of x,
**      where x = [0,..,10].
**
*/

FLOAT BandExpTable[LpcOrder] = {
  (F)0.994 ,
  (F)0.988036 ,
  (F)0.9821078 ,
  (F)0.9762151 ,
  (F)0.9703578 ,
  (F)0.9645357 ,
  (F)0.9587485 ,
  (F)0.9529960 ,
  (F)0.9472780 ,
  (F)0.9415944 ,
};



/*
**  CosineTable:
**
**  Purpose:
**      Used to evaluate polynomial for LSP-LPC conversion
**
**  Table Structure:
**      Contains one period of a cosine wave.
**
*/

FLOAT CosineTable[CosineTableSize] = {
   (F)1 ,
   (F)0.999939 ,
   (F)0.999695 ,
   (F)0.999329 ,
   (F)0.998779 ,
   (F)0.998108 ,
   (F)0.997314 ,
   (F)0.996338 ,
   (F)0.995178 ,
   (F)0.993896 ,
   (F)0.992493 ,
   (F)0.990906 ,
   (F)0.989197 ,
   (F)0.987305 ,
   (F)0.985291 ,
   (F)0.983093 ,
   (F)0.980774 ,
   (F)0.978333 ,
   (F)0.975708 ,
   (F)0.972961 ,
   (F)0.970032 ,
   (F)0.96698 ,
   (F)0.963806 ,
   (F)0.960449 ,
   (F)0.95697 ,
   (F)0.953308 ,
   (F)0.949524 ,
   (F)0.945618 ,
   (F)0.941528 ,
   (F)0.937317 ,
   (F)0.932983 ,
   (F)0.928528 ,
   (F)0.923889 ,
   (F)0.919128 ,
   (F)0.914185 ,
   (F)0.90918 ,
   (F)0.903992 ,
   (F)0.898682 ,
   (F)0.89325 ,
   (F)0.887634 ,
   (F)0.881897 ,
   (F)0.876099 ,
   (F)0.870117 ,
   (F)0.863953 ,
   (F)0.857727 ,
   (F)0.851379 ,
   (F)0.844849 ,
   (F)0.838196 ,
   (F)0.831482 ,
   (F)0.824585 ,
   (F)0.817566 ,
   (F)0.810486 ,
   (F)0.803223 ,
   (F)0.795837 ,
   (F)0.78833 ,
   (F)0.780762 ,
   (F)0.77301 ,
   (F)0.765198 ,
   (F)0.757202 ,
   (F)0.749146 ,
   (F)0.740967 ,
   (F)0.732666 ,
   (F)0.724243 ,
   (F)0.715759 ,
   (F)0.707092 ,
   (F)0.698364 ,
   (F)0.689514 ,
   (F)0.680603 ,
   (F)0.67157 ,
   (F)0.662415 ,
   (F)0.653198 ,
   (F)0.64386 ,
   (F)0.634399 ,
   (F)0.624878 ,
   (F)0.615234 ,
   (F)0.60553 ,
   (F)0.595703 ,
   (F)0.585815 ,
   (F)0.575806 ,
   (F)0.565735 ,
   (F)0.555542 ,
   (F)0.545349 ,
   (F)0.534973 ,
   (F)0.524597 ,
   (F)0.514099 ,
   (F)0.50354 ,
   (F)0.49292 ,
   (F)0.482178 ,
   (F)0.471375 ,
   (F)0.46051 ,
   (F)0.449585 ,
   (F)0.438599 ,
   (F)0.427551 ,
   (F)0.416443 ,
   (F)0.405212 ,
   (F)0.393982 ,
   (F)0.38269 ,