hvxccbamenc.h

语音压缩算法

/*

This software module was originally developed by

    Masayuki Nishiguchi (Sony Corporation)

    and edited by

    Yuji Maeda (Sony Corporation)

    in the course of development of the MPEG-4 Audio standard (ISO/IEC 14496-3).
    This software module is an implementation of a part of one or more
    MPEG-4 Audio (ISO/IEC 14496-3) tools as specified by the MPEG-4 Audio
    standard (ISO/IEC 14496-3).
    ISO/IEC gives users of the MPEG-4 Audio standards (ISO/IEC 14496-3)
    free license to this software module or modifications thereof for use
    in hardware or software products claiming conformance to the MPEG-4
    Audio standards (ISO/IEC 14496-3).
    Those intending to use this software module in hardware or software
    products are advised that this use may infringe existing patents.
    The original developer of this software module and his/her company,
    the subsequent editors and their companies, and ISO/IEC have no
    liability for use of this software module or modifications thereof in
    an implementation.
    Copyright is not released for non MPEG-4 Audio (ISO/IEC 14496-3)
    conforming products. The original developer retains full right to use
    the code for his/her own purpose, assign or donate the code to a third
    party and to inhibit third party from using the code for non MPEG-4
    Audio (ISO/IEC 14496-3) conforming products.
    This copyright notice must be included in all copies or derivative works.

    Copyright (c)1996.

*/

static cbook_lpc cba_lpc =
{
  {
     1.4277322769e+01f, 2.4427261353e+01f, 5.1531036377e+01f, 3.8094165802e+01f,
     1.5629663086e+02f, 1.2007367706e+02f, 6.9551498413e+01f, 9.1061431885e+01f,
     1.1360032959e+03f, 9.4679547119e+02f, 6.1508343506e+02f, 7.6936199951e+02f,
     2.0661782837e+02f, 2.7738925171e+02f, 4.8511575317e+02f, 3.7061630249e+02f,
     6.6570297852e+03f, 5.5529902344e+03f, 4.4632456055e+03f, 5.0344755859e+03f,
     3.1603977051e+03f, 3.4228183594e+03f, 4.0258488770e+03f, 3.6935373535e+03f,
     1.3403870850e+03f, 1.5429980469e+03f, 2.0011907959e+03f, 1.7811741943e+03f,
     2.8798361816e+03f, 2.6719782715e+03f, 2.2384204102e+03f, 2.4639086914e+03f,
  },
  {
    {
       5.8819748461e-02f, 9.3861304224e-02f, 4.7118034214e-02f, 1.3120673597e-02f,
       4.2679972947e-02f, 5.6458037347e-02f, 2.1073838696e-02f, 1.4127705945e-03f,
       1.9078921527e-02f, 3.2528404146e-02f, 2.9394164681e-02f, 2.2569352761e-02f,
       3.1202243641e-02f, 5.2047207952e-02f, 5.0222467631e-02f, 3.5644743592e-02f,
       3.0297558755e-02f, 3.6113645881e-02f, 2.5096289814e-02f, 1.8328050151e-02f,
       2.6043191552e-02f, 3.6892917007e-02f, 4.1834302247e-02f, 4.1009154171e-02f,
       4.4162660837e-02f, 4.6920023859e-02f, 5.2744042128e-02f, 4.4227186590e-02f,
       3.5669751465e-02f, 3.5182271153e-02f, 4.0188916028e-02f, 2.9835734516e-02f,
       1.6929663718e-02f, 1.2898490764e-02f, 1.9803266972e-02f, 2.4855496362e-02f,
       3.2566908747e-02f, 4.3261632323e-02f, 5.6911692023e-02f, 6.3303709030e-02f,
       5.1197323948e-02f, 2.3190757260e-02f, 1.8529446796e-02f, 7.1556223556e-03f,
    },
    {
       4.8871569335e-02f, 7.9412519932e-02f, 6.1238162220e-02f, 5.5874615908e-02f,
       7.0684976876e-02f, 5.5689472705e-02f, 2.0528776571e-02f, -6.7783694249e-04f,
       4.1763554327e-03f, 2.1712809801e-02f, 3.1134236604e-02f, 2.8364202008e-02f,
       2.1726056933e-02f, 3.3196389675e-02f, 4.5456487685e-02f, 6.4699374139e-02f,
       7.3621042073e-02f, 6.7012704909e-02f, 4.4837214053e-02f, 3.4835200757e-02f,
       4.1962504387e-02f, 5.5134207010e-02f, 6.7201323807e-02f, 6.7834749818e-02f,
       5.6158803403e-02f, 4.7373812646e-02f, 4.3273460120e-02f, 4.2160362005e-02f,
       4.0031205863e-02f, 3.9065551013e-02f, 4.0149483830e-02f, 2.7852423489e-02f,
       1.0785039514e-02f, 6.7186630331e-03f, 1.5545932576e-02f, 2.5005336851e-02f,
       3.0253017321e-02f, 3.0891941860e-02f, 3.5267263651e-02f, 4.1896276176e-02f,
       4.2022921145e-02f, 5.3294818848e-02f, 9.1553628445e-02f, 8.5433095694e-02f,
    },
    {
       2.4683391675e-02f, 4.2231369764e-02f, 4.1787624359e-02f, 4.2044684291e-02f,
       4.9441475421e-02f, 5.0555076450e-02f, 4.2335528880e-02f, 2.8047479689e-02f,
       1.9379884005e-02f, 2.3474236950e-02f, 3.4558840096e-02f, 3.4197043628e-02f,
       2.9653949663e-02f, 4.5857202262e-02f, 4.8962634057e-02f, 4.9172062427e-02f,
       4.8764143139e-02f, 5.6099772453e-02f, 5.0366304815e-02f, 3.6228150129e-02f,
       3.7603646517e-02f, 4.8473093659e-02f, 4.8064518720e-02f, 3.7903234363e-02f,
       3.2496560365e-02f, 3.2952822745e-02f, 3.7241499871e-02f, 5.1853429526e-02f,
       8.4321834147e-02f, 1.0171223432e-01f, 1.1665632576e-01f, 1.2236715853e-01f,
       9.9999070168e-02f, 7.2181835771e-02f, 4.0153615177e-02f, 2.0574832335e-02f,
       1.5615364537e-02f, 1.5869993716e-02f, 2.6966281235e-02f, 3.5173915327e-02f,
       2.4136606604e-02f, -5.1817572676e-03f, -6.3364054076e-03f, 5.3371610120e-03f,
    },
    {
       3.2316930592e-02f, 6.9475047290e-02f, 8.6175821722e-02f, 8.4221631289e-02f,
       7.9035773873e-02f, 6.8688094616e-02f, 5.3259685636e-02f, 3.3728487790e-02f,
       2.0533466712e-02f, 1.5299044549e-02f, 1.7260372639e-02f, 1.7390608788e-02f,
       1.7463522032e-02f, 3.1245855615e-02f, 3.0911922455e-02f, 2.5266775861e-02f,
       2.7406129986e-02f, 3.0088895932e-02f, 2.1932294592e-02f, 1.4222909696e-02f,
       1.6033075750e-02f, 2.4194544181e-02f, 2.4819886312e-02f, 2.4123618379e-02f,
       2.2787833586e-02f, 2.6162726805e-02f, 2.6893839240e-02f, 2.3479567841e-02f,
       2.2096801549e-02f, 1.9024293870e-02f, 1.3828465715e-02f, 7.0211756974e-03f,
       2.2266115993e-03f, 5.4535889067e-03f, 1.8315145746e-02f, 2.4675985798e-02f,
       3.0890822411e-02f, 3.3887583762e-02f, 3.8129080087e-02f, 4.0101163089e-02f,
       2.8312398121e-02f, -3.0101649463e-03f, -1.1731998529e-03f, 1.0505731218e-02f,
    },
    {
       1.0645846277e-01f, 6.7329242826e-02f, -1.6714345664e-02f, 7.3007727042e-03f,
       2.2047113627e-02f, 1.8778838217e-02f, 2.0771019161e-02f, 1.7934981734e-02f,
       1.9775275141e-02f, 2.8688205406e-02f, 3.7169270217e-02f, 2.7402881533e-02f,
       1.2317134999e-02f, 2.3753659800e-02f, 3.0001468956e-02f, 3.8586121053e-02f,
       3.9731174707e-02f, 3.5777512938e-02f, 2.1823013201e-02f, 9.0754339471e-03f,
       1.1811972596e-02f, 2.4254757911e-02f, 3.6848545074e-02f, 3.7516880780e-02f,
       3.8546051830e-02f, 4.2317461222e-02f, 4.4197242707e-02f, 4.5351982117e-02f,
       4.6806633472e-02f, 4.1953504086e-02f, 2.9400527477e-02f, 1.5827732161e-02f,
       3.6057170946e-03f, 7.8869936988e-03f, 2.1630072966e-02f, 2.5109922513e-02f,
       3.3328097314e-02f, 3.9614472538e-02f, 4.9577750266e-02f, 5.1395148039e-02f,
       3.2411795110e-02f, 4.0923268534e-03f, -4.9198260531e-03f, -6.5661720000e-03f,
    },
    {
       1.6975034028e-02f, 4.1352070868e-02f, 6.4901754260e-02f, 7.9033359885e-02f,
       7.2041116655e-02f, 3.6708444357e-02f, -1.0403243825e-02f, -3.2840065658e-02f,
       -2.1601937711e-02f, 3.3114261460e-03f, 2.2614018992e-02f, 2.5267221034e-02f,
       1.6067504883e-02f, 2.2008022293e-02f, 2.0423235372e-02f, 1.6338530928e-02f,
       2.1665964276e-02f, 3.0732197687e-02f, 2.8864432126e-02f, 1.7907647416e-02f,
       1.7633078620e-02f, 2.2661305964e-02f, 2.5312885642e-02f, 2.1312126890e-02f,
       1.5247132629e-02f, 1.5420299023e-02f, 1.8361732364e-02f, 1.6553647816e-02f,
       1.5191568062e-02f, 1.6205305234e-02f, 1.9334279001e-02f, 1.6149401665e-02f,
       1.2179457583e-02f, 1.3218896464e-02f, 1.3571953401e-02f, 1.1827865615e-02f,
       1.3693536632e-02f, 1.1865335517e-02f, 2.2464603186e-02f, 3.1910575926e-02f,
       2.2024041042e-02f, -5.6170350872e-03f, -9.4753624871e-03f, -1.1609563371e-03f,
    },
    {
       1.0118631646e-02f, 3.6039318889e-02f, 7.6038688421e-02f, 1.1855419725e-01f,
       1.2439072132e-01f, 8.1049792469e-02f, 2.4128470570e-02f, -6.0141538270e-03f,
       1.1604151689e-02f, 4.4392492622e-02f, 6.3117690384e-02f, 5.3042437881e-02f,
       3.3345483243e-02f, 3.0971633270e-02f, 2.8364934027e-02f, 2.5159498677e-02f,
       3.1332012266e-02f, 4.0923949331e-02f, 3.7316050380e-02f, 2.3052547127e-02f,
       2.3418258876e-02f, 3.1808927655e-02f, 3.5763289779e-02f, 2.6295870543e-02f,
       1.9919270650e-02f, 2.3661365733e-02f, 2.9869837686e-02f, 3.3885229379e-02f,
       3.5865496844e-02f, 3.7956643850e-02f, 2.6621466503e-02f, 1.1694314890e-02f,
       -1.3196260261e-04f, 1.6740674619e-03f, 1.4299917035e-02f, 2.3926476017e-02f,
       3.1406264752e-02f, 3.0109817162e-02f, 3.8054041564e-02f, 4.1092451662e-02f,
       2.5878285989e-02f, -8.0648791045e-03f, -1.7479123548e-02f, -1.0938938707e-02f,
    },
    {
       4.3306499720e-02f, 8.6021497846e-02f, 8.7245382369e-02f, 6.1799056828e-02f,
       3.3690650016e-02f, 1.4516823925e-02f, 3.2722528558e-03f, -9.9198147655e-04f,
       1.2129316106e-02f, 3.4726873040e-02f, 5.7010982186e-02f, 5.4310474545e-02f,
       3.4216213971e-02f, 2.8946742415e-02f, 2.1106116474e-02f, 1.5583798289e-02f,
       2.2401792929e-02f, 2.5670088828e-02f, 2.0390128717e-02f, 1.5215812251e-02f,
       2.0550219342e-02f, 3.1793337315e-02f, 3.4282941371e-02f, 3.1439457089e-02f,
       3.0268855393e-02f, 3.3411063254e-02f, 3.5523779690e-02f, 3.3361945301e-02f,
       2.8115876019e-02f, 2.2591777146e-02f, 1.5990726650e-02f, 9.0388664976e-03f,
       4.2094485834e-03f, 1.0867130943e-02f, 2.8406267986e-02f, 3.9541911334e-02f,
       4.4806934893e-02f, 3.8689646870e-02f, 4.0346574038e-02f, 4.2935628444e-02f,
       3.1997796148e-02f, 3.0310042202e-03f, -5.0504799001e-03f, 1.9110098947e-04f,
    },
    {
       6.1082910746e-02f, 1.1011497676e-01f, 1.0341765732e-01f, 5.9664249420e-02f,
       4.2849544436e-02f, 7.4377849698e-02f, 1.1801311374e-01f, 1.0613727570e-01f,
       6.2655277550e-02f, 3.7145569921e-02f, 4.2601726949e-02f, 5.6263964623e-02f,
       6.9558031857e-02f, 9.2821739614e-02f, 8.8654749095e-02f, 7.4373811483e-02f,
       6.9542765617e-02f, 6.8817518651e-02f, 6.2202688307e-02f, 5.3755577654e-02f,
       5.4700423032e-02f, 6.2831953168e-02f, 6.7061342299e-02f, 6.3850417733e-02f,
       6.3165843487e-02f, 6.5290436149e-02f, 7.2861030698e-02f, 7.6138064265e-02f,
       7.5420312583e-02f, 6.4289174974e-02f, 5.7370644063e-02f, 4.5673359185e-02f,
       3.9198007435e-02f, 3.9754133672e-02f, 5.5165186524e-02f, 6.8919144571e-02f,
       8.0096468329e-02f, 8.5268713534e-02f, 9.3134567142e-02f, 9.6661575139e-02f,
       8.1678152084e-02f, 5.3439568728e-02f, 4.9137350172e-02f, 3.1697809696e-02f,
    },
    {
       3.8420464844e-02f, 7.7857807279e-02f, 8.7948091328e-02f, 7.5073793530e-02f,
       7.0671856403e-02f, 6.7001931369e-02f, 6.0827746987e-02f, 5.7909548283e-02f,
       5.6665752083e-02f, 5.6151337922e-02f, 5.7596098632e-02f, 5.0867322832e-02f,
       4.9803815782e-02f, 7.0196703076e-02f, 7.8416034579e-02f, 8.0167070031e-02f,
       8.4792912006e-02f, 7.6703198254e-02f, 6.0424931347e-02f, 4.8945486546e-02f,
       5.2403375506e-02f, 6.6278316081e-02f, 7.7262736857e-02f, 8.7728902698e-02f,
       1.0316040367e-01f, 1.2786401808e-01f, 1.3337166607e-01f, 1.0862018913e-01f,
       7.6222136617e-02f, 5.5518288165e-02f, 4.1951432824e-02f, 3.0695341527e-02f,
       2.3415615782e-02f, 2.4426858872e-02f, 3.4665416926e-02f, 4.3070361018e-02f,
       5.5287018418e-02f, 7.5118437409e-02f, 1.1355710030e-01f, 1.6842924058e-01f,
       1.8229193985e-01f, 1.3081254065e-01f, 7.0660121739e-02f, 2.2412663326e-02f,
    },
    {
       2.2335371003e-02f, 4.8364449292e-02f, 5.7229641825e-02f, 6.0332540423e-02f,