dec3hpiir.h

各种工程计算的库函数

/*

    IIR Decimation filter for rate 3 (highpass)
    Copyright (C) 2002 Jussi Laako

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/


#ifdef _MSC_VER
#pragma warning(disable:4305)
#endif


/* f1: 0.33333,  f2: 0.36667, r: 0.5, a: 72, t: chebyshev */

/*static const long lDec3hpIIRSize = 7l;

static const float fpDec3hpIIRCoeffs[][5] = {
{  // 0
    0.164190070508077,
    -0.328380141016154,
    0.164190070508077,
    -1.32232884862835,
    -0.97908913066066
},
{  // 1
    0.14771660147541,
    -0.295433202950821,
    0.14771660147541,
    -1.34773146232607,
    -0.938597868227715
},
{  // 2
    0.120539151339148,
    -0.241078302678296,
    0.120539151339148,
    -1.41797686375095,
    -0.900133469107542
},
{  // 3
    0.0865329534381814,
    -0.173065906876363,
    0.0865329534381814,
    -1.51853502185987,
    -0.864666835612592
},
{  // 4
    0.0513435553615828,
    -0.102687110723166,
    0.0513435553615828,
    -1.62875451749147,
    -0.834128738937801
},
{  // 5
    0.0219355901407475,
    -0.0438711802814949,
    0.0219355901407475,
    -1.72351458121296,
    -0.811256941775948
},
{  // 6
    0.00508454201718919,
    -0.0101690840343784,
    0.00508454201718919,
    -1.77855563451542,
    -0.798893802584178
}
};


static const double dpDec3hpIIRCoeffs[][5] = {
{  // 0
    0.164190070508077,
    -0.328380141016154,
    0.164190070508077,
    -1.32232884862835,
    -0.97908913066066
},
{  // 1
    0.14771660147541,
    -0.295433202950821,
    0.14771660147541,
    -1.34773146232607,
    -0.938597868227715
},
{  // 2
    0.120539151339148,
    -0.241078302678296,
    0.120539151339148,
    -1.41797686375095,
    -0.900133469107542
},
{  // 3
    0.0865329534381814,
    -0.173065906876363,
    0.0865329534381814,
    -1.51853502185987,
    -0.864666835612592
},
{  // 4
    0.0513435553615828,
    -0.102687110723166,
    0.0513435553615828,
    -1.62875451749147,
    -0.834128738937801
},
{  // 5
    0.0219355901407475,
    -0.0438711802814949,
    0.0219355901407475,
    -1.72351458121296,
    -0.811256941775948
},
{  // 6
    0.00508454201718919,
    -0.0101690840343784,
    0.00508454201718919,
    -1.77855563451542,
    -0.798893802584178
}
};*/


/* f1: 0.33333,  f2: 0.35, r: 0.5, a: 72, t: chebyshev */

static const long lDec3hpIIRSize = 10l;

static const float fpDec3hpIIRCoeffs[][5] = {
{ // 0
    0.205234253514393,
    -0.410468507028786,
    0.205234253514393,
    -1.16785413526889,
    -0.988791149326458
},
{ // 1
    0.195102566174706,
    -0.390205132349412,
    0.195102566174706,
    -1.18627805084895,
    -0.966688315547777
},
{ // 2
    0.177737827687996,
    -0.355475655375991,
    0.177737827687996,
    -1.23399160039572,
    -0.944942911147706
},
{ // 3
    0.154099624689977,
    -0.308199249379955,
    0.154099624689977,
    -1.30720250542069,
    -0.923601004180597
},
{ // 4
    0.12565595909824,
    -0.251311918196479,
    0.12565595909824,
    -1.40028694844756,
    -0.90291078484052
},
{ // 5
    0.0945035087026048,
    -0.18900701740521,
    0.0945035087026048,
    -1.50536508729511,
    -0.883379122105524
},
{ // 6
    0.0634071813715804,
    -0.126814362743161,
    0.0634071813715804,
    -1.61216230556321,
    -0.865791031049534
},
{ // 7
    0.0356575599864075,
    -0.0713151199728149,
    0.0356575599864075,
    -1.70852981180808,
    -0.851160051753707
},
{ // 8
    0.0146679323911365,
    -0.0293358647822729,
    0.0146679323911365,
    -1.7819124197207,
    -0.840584149285245
},
{ // 9
    0.00333345430283358,
    -0.00666690860566715,
    0.00333345430283358,
    -1.8216827274188,
    -0.835016544630132
}
};


static const double dpDec3hpIIRCoeffs[][5] = {
{ // 0
    0.205234253514393,
    -0.410468507028786,
    0.205234253514393,
    -1.16785413526889,
    -0.988791149326458
},
{ // 1
    0.195102566174706,
    -0.390205132349412,
    0.195102566174706,
    -1.18627805084895,
    -0.966688315547777
},
{ // 2
    0.177737827687996,
    -0.355475655375991,
    0.177737827687996,
    -1.23399160039572,
    -0.944942911147706
},
{ // 3
    0.154099624689977,
    -0.308199249379955,
    0.154099624689977,
    -1.30720250542069,
    -0.923601004180597
},
{ // 4
    0.12565595909824,
    -0.251311918196479,
    0.12565595909824,
    -1.40028694844756,
    -0.90291078484052
},
{ // 5
    0.0945035087026048,
    -0.18900701740521,
    0.0945035087026048,
    -1.50536508729511,
    -0.883379122105524
},
{ // 6
    0.0634071813715804,
    -0.126814362743161,
    0.0634071813715804,
    -1.61216230556321,
    -0.865791031049534
},
{ // 7
    0.0356575599864075,
    -0.0713151199728149,
    0.0356575599864075,
    -1.70852981180808,
    -0.851160051753707
},
{ // 8
    0.0146679323911365,
    -0.0293358647822729,
    0.0146679323911365,
    -1.7819124197207,
    -0.840584149285245
},
{ // 9
    0.00333345430283358,
    -0.00666690860566715,
    0.00333345430283358,
    -1.8216827274188,
    -0.835016544630132
}
};