tab_lbc.c

嵌入式linux系统的网络编程（C＋＋） 在ARM上实现视频会议 此程序获得全国研究生电子大赛一等奖 压缩包内为全部源码

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   -686,    -82,    842,    454,
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    138,    477,     36,    450,
    404,    787,    -73,   1000,
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   3251,   2124,   1723,    996,
   3633,   2336,   2408,   1453,
   2923,   3517,   2567,   1318,
   } ;

/*
**  BandQntTable:
**
**  Purpose:
**      collects the three subvector tables.
*/


Word16  *BandQntTable[LspQntBands] = {
   Band0Tb8 ,
   Band1Tb8 ,
   Band2Tb8 ,
   } ;

/*
**  PerFiltZeroTable:
**
**  Purpose:
**     Creates the FIR part of the formant perceptual weighting filter. 
**     Corresponds to gamma1 in section 2.8.
**
**  Table Structure:
**     (0.9) to the x power, where x = [1,..,10]
**     These values are scaled by 32768.
*/

Word16   PerFiltZeroTable[LpcOrder] = {
   29491 ,
   26542 ,
   23888 ,
   21499 ,
   19349 ,
   17414 ,
   15673 ,
   14106 ,
   12695 ,
   11425 ,
   } ;

/*
**  PerFiltPoleTable:
**
**  Purpose:
**     Creates the IIR part of the formant perceptual weighting filter. 
**     Corresponds to gamma2 in section 2.8.
**
**  Table Structure:
**     (0.5) to the x power, where x = [1,..,10]
**     These values are scaled by 32768
*/

Word16   PerFiltPoleTable[LpcOrder] = {
   16384 ,
    8192 ,
    4096 ,
    2048 ,
    1024 ,
     512 ,
     256 ,
     128 ,
      64 ,
      32 ,
   } ;

/*
**  PostFiltZeroTable:
**
**  Purpose:
**     Creates the FIR part of the formant postfilter.  Corresponds to
**     lambda1 in section 3.8.
**
**  Table Structure:
**     (0.65) to the x power, where x = [1,..,10]
**     These values are scaled by 32768
*/

Word16   PostFiltZeroTable[LpcOrder] = {
  21299 ,
  13844 ,
   8999 ,
   5849 ,
   3802 ,
   2471 ,
   1606 ,
   1044 ,
    679 ,
    441 ,
   } ;

/*
**  PostFiltPoleTable:
**
**  Purpose:
**     Creates the IIR part of the formant postfilter.  Corresponds to
**     lambda2 in section 3.8.
**
**  Table Structure:
**     (0.75) to the x power, where x = [1,..,10]
**     These values are scaled by 32768
*/

Word16   PostFiltPoleTable[LpcOrder] = {
 24576 ,
 18432 ,
 13824 ,
 10368 ,
  7776 ,
  5832 ,
  4374 ,
  3281 ,
  2460 ,
  1845 ,
   } ;

/*
**  Nb_puls:
**
**  Purpose:
**      Indexing
**
**  Table Structure:
**      Table values are the number of non-zero pulses in the high-rate
**      excitation (MP-MLQ), indexed by subframe number (0,..,3).
*/

Word16   Nb_puls[4] = { 6,5,6,5};

/*
**  FcbkGainTable:
**
**  Purpose:
**      Logarithmic scalar quantizer in 24 steps of 3.2 dB each
**
**  Table Structure:
**      Contains x where 20*log10(x) = 3.2*i,  i = 1,..,24
*/

Word16   FcbkGainTable[NumOfGainLev] = {
    1 ,
    2 ,
    3 ,
    4 ,
    6 ,
    9 ,
   13 ,
   18 ,
   26 ,
   38 ,
   55 ,
   80 ,
  115 ,
  166 ,
  240 ,
  348 ,
  502 ,
  726 ,
 1050 ,
 1517 ,
 2193 ,
 3170 ,
 4582 ,
 6623 ,
   } ;

/*
**  MaxPosTable:
**
**  Purpose:
**      size of the high rate fixed excitation codebooks (MP-MLQ)
**
**  Table Structure:
**      Table values are the number of codewords in the high rate fixed
**      excitation codebook (MP-MLQ), indexed by subframe number (0,..,3).
**      MaxPosTable[i] is the number of combinations of i elements among 30
**      non-zero pulses in the high-rate
*/

Word32   MaxPosTable[4] = {
 0x00090f6fL ,
 0x00022caaL ,
 0x00090f6fL ,
 0x00022caaL ,
   } ;

/*
**  CombinatorialTable:
**
**  Purpose:
**      used for the coding and the decoding of the pulses positions
**      for the high-rate fixed excitation codebook
**
**  Table Structure:
**      CombinatorialTable[i][j] is the number of combinations of
**      (MaxPulsNum-1-i) elements among (SubFrLen-2-j)
*/

Word32   CombinatorialTable[MaxPulseNum][SubFrLen/Sgrid] = {
 { 118755L ,
  98280L ,
  80730L ,
  65780L ,
  53130L ,
  42504L ,
  33649L ,
  26334 ,
  20349 ,
  15504 ,
  11628 ,
   8568 ,
   6188 ,
   4368 ,
   3003 ,
   2002 ,
   1287 ,
    792 ,
    462 ,
    252 ,
    126 ,
     56 ,
     21 ,
      6 ,
      1 ,
      0 ,
      0 ,
      0 ,
      0 ,
     0 },

 { 23751 ,
  20475 ,
  17550 ,
  14950 ,
  12650 ,
  10626 ,
   8855 ,
   7315 ,
   5985 ,
   4845 ,
   3876 ,
   3060 ,
   2380 ,
   1820 ,
   1365 ,
   1001 ,
    715 ,
    495 ,
    330 ,
    210 ,
    126 ,
     70 ,
     35 ,
     15 ,
      5 ,
      1 ,
      0 ,
      0 ,
      0 ,
    0 } ,

  { 3654 ,
   3276 ,
   2925 ,
   2600 ,
   2300 ,
   2024 ,
   1771 ,
   1540 ,
   1330 ,
   1140 ,
    969 ,
    816 ,
    680 ,
    560 ,
    455 ,
    364 ,
    286 ,
    220 ,
    165 ,
    120 ,
     84 ,
     56 ,
     35 ,
     20 ,
     10 ,
      4 ,
      1 ,
      0 ,
      0 ,
    0 } ,

   {  406 ,
    378 ,
    351 ,
    325 ,
    300 ,
    276 ,
    253 ,
    231 ,
    210 ,
    190 ,
    171 ,
    153 ,
    136 ,
    120 ,
    105 ,
     91 ,
     78 ,
     66 ,
     55 ,
     45 ,
     36 ,
     28 ,
     21 ,
     15 ,
     10 ,
      6 ,
      3 ,
      1 ,
      0 ,
      0 } ,

   { 29 ,