lpc2lsp.h

嵌入式系统开发中

#define PRINTF_SUPPORT 
#define MAX_PERMISSIBLE_ERROR  3
#define FiltOrd 10                     //filter order
#define grid_points 60
#define TRUE 1
#define FALSE 0

typedef int fract32;
typedef short fract16;

segment ("mydata1") fract16 PtrLsp[FiltOrd];

segment ("mydata2") fract16 PtrOldLsp[FiltOrd];

segment ("mydata1") fract16 PtrLpcCoeff1[FiltOrd+1]=
{4096, -4640, -148, 867, 193, -189, 481, -362, 358, -278, 270};

segment ("mydata1") fract16 PtrLpcCoeff2[FiltOrd+1]=
{4096, -8053, 2380, 5482, -3177, -3158, 3046, 384, -105, -1461, 838};

segment ("mydata1") fract16 PtrLpcCoeff3[FiltOrd+1]=
{4096, -8783, 6587, -124, -836, -3117, 4186, -1272, -767, 410, 105};

fract16 LspExpd1[FiltOrd]=
{32099,31529,27767,21170,11374,1119,-10051,-19623,-27316,-30929};

fract16 LspExpd2[FiltOrd]=
{32088,30893,29339,25741,19475,13819,-7244,-20357,-28407,-30909};

fract16 LspExpd3[FiltOrd]=
{31952,29810,26629,24119,18717,13433,-1241,-18694,-24951,-29497};


/*-------------------------------------------------------------*
 *  Table for lpc2lsf()                                         *
 *                                                             *
 * grid[0] = 1.0;                                              *
 * grid[grid_points+1] = -1.0;                                 *
 * for (i = 1; i < grid_points; i++)                           *
 *   grid[i] = cos((6.283185307*i)/(2.0*grid_points));         *
 *                                                             *
 *-------------------------------------------------------------*/

segment ("mydata1") fract16 grid[grid_points + 1] =
{
    32760, 32723, 32588, 32364, 32051, 31651,
    31164, 30591, 29935, 29196, 28377, 27481,
    26509, 25465, 24351, 23170, 21926, 20621,
    19260, 17846, 16384, 14876, 13327, 11743,
    10125, 8480, 6812, 5126, 3425, 1714,
    0, -1714, -3425, -5126, -6812, -8480,
    -10125, -11743, -13327, -14876, -16384, -17846,
    -19260, -20621, -21926, -23170, -24351, -25465,
    -26509, -27481, -28377, -29196, -29935, -30591,
    -31164, -31651, -32051, -32364, -32588, -32723,
    -32760
};