fircoefficients.h

g711、VAD的激活算法

// AudioSink.h: interface for the AudioSink class.
// FIRCoefficients.h: FIR filter coefficients for ITU and Telecaster
//	there are used to shape the input and output signals to the sound
//	card so that the audio sounds sharper. especially good when low
//	bandwidth codecs are used
//
//////////////////////////////////////////////////////////////////////

#ifndef AFX_FIRCOEFFICIENTS_H__08C0DCDA_463E_4DF1_80E7_1BC6CE17AF92__INCLUDED_
#define AFX_FIRCOEFFICIENTS_H__08C0DCDA_463E_4DF1_80E7_1BC6CE17AF92__INCLUDED_

/*
FIR Filter Coefficients
Sampling Rate
8.000000E+3
N
29
h[0..28]
*/

#define FIR_ITU_TX_IRS_NUM 29
double FIR_ITU_TX_IRS[] =
{
	0.001554,
	-0.004377,
	-0.017541,
	-0.009891,
	-0.005435,
	-0.014788,
	-0.015432,
	-0.013299,
	-0.026527,
	0.012746,
	-0.061046,
	0.020939,
	-0.128970,
	-0.165718,
	0.853968,
	-0.165718,
	-0.128970,
	0.020939,
	-0.061046,
	0.012746,
	-0.026527,
	-0.013299,
	-0.015432,
	-0.014788,
	-0.005435,
	-0.009891,
	-0.017541,
	-0.004377,
	0.001554
};

#define FIR_ITU_RX_IRS_NUM 29
double FIR_ITU_RX_IRS[] =
{
	0.012562,
	-0.008807,
	-0.026119,
	-0.012092,
	-0.026479,
	-0.018424,
	-0.038491,
	-0.023865,
	-0.066477,
	-0.007258,
	-0.096165,
	-0.009702,
	-0.136447,
	-0.011532,
	0.941143,
	-0.011532,
	-0.136447,
	-0.009702,
	-0.096165,
	-0.007258,
	-0.066477,
	-0.023865,
	-0.038491,
	-0.018424,
	-0.026479,
	-0.012092,
	-0.026119,
	-0.008807,
	0.012562
};

#define FIR_TELECASTER_TX_NUM 29
double FIR_TELECASTER_TX[] =
{
	-0.033925,
	-0.012966,
	0.002133,
	-0.007380,
	-0.032748,
	0.006314,
	-0.050229,
	0.039981,
	-0.093428,
	0.049791,
	-0.102505,
	0.090953,
	-0.115604,
	-0.137524,
	1.166885,
	-0.137524,
	-0.115604,
	0.090953,
	-0.102505,
	0.049791,
	-0.093428,
	0.039981,
	-0.050229,
	0.006314,
	-0.032748,
	-0.007380,
	0.002133,
	-0.012966,
	-0.033925
};

#define FIR_TELECASTER_RX_NUM 29
double FIR_TELECASTER_RX[] =
{
	-0.008976,
	-0.056441,
	-0.024475,
	-0.019666,
	-0.048301,
	-0.029223,
	-0.068824,
	-0.021638,
	-0.079281,
	0.016318,
	-0.106304,
	0.055010,
	-0.108572,
	-0.003198,
	1.049007,
	-0.003198,
	-0.108572,
	0.055010,
	-0.106304,
	0.016318,
	-0.079281,
	-0.021638,
	-0.068824,
	-0.029223,
	-0.048301,
	-0.019666,
	-0.024475,
	-0.056441,
	-0.008976
};


#endif // !defined(AFX_FIRCOEFFICIENTS_H__08C0DCDA_463E_4DF1_80E7_1BC6CE17AF92__INCLUDED_)