ol_ltp.h

AMR-NB 的编码实现,纯C, VC下建立工程即可用.

#ifndef OL_LTP_H
#define OL_LTP_H
 
#include "AmrCode_Comm.h"


int ol_ltp(pitchOLWghtState *st, vadState *vadSt,Mode mode,   Word16 wsp[],   Word16 *T_op,  Word16 old_lags[],  Word16 ol_gain_flg[],Word16 idx, Flag dtx );
Word16 Pitch_fr ( Pitch_frState *st, Mode mode,  Word16 T_op[], Word16 exc[],  Word16 xn[],
                             Word16 h[],    Word16 L_subfr, Word16 i_subfr, Word16 *pit_frac, Word16 *resu3, Word16 *ana_index );
Word16 Pitch_ol ( vadState *vadSt,  Mode mode,Word16 signal[],  Word16 pit_min,   Word16 pit_max, Word16 L_frame,Word16 idx, Flag dtx   );

void Pred_lt_3or6 (Word16 exc[],  Word16 T0,  Word16 frac,  Word16 L_subfr,   Word16 flag3 );

Word16 Pitch_ol_wgh ( pitchOLWghtState *st, vadState *vadSt, Word16 signal[],   
    Word16 pit_min,  Word16 pit_max,  Word16 L_frame, Word16 old_lags[], Word16 ol_gain_flg[], Word16 idx,    Flag dtx  );
int cl_ltp( clLtpState *clSt, tonStabState *tonSt, Mode mode,    Word16 frameOffset,  Word16 T_op[], Word16 *h1,  Word16 *exc,       
    Word16 res2[],  Word16 xn[],    Word16 lsp_flag,  Word16 xn2[],  Word16 y1[], Word16 *T0,       
    Word16 *T0_frac,  Word16 *gain_pit,  Word16 g_coeff[], Word16 **anap,  Word16 *gp_limit );

Word16 G_pitch     (  Mode mode,  Word16 xn[],  Word16 y1[],  Word16 g_coeff[],  Word16 L_subfr );
Word16 hp_max ( Word32 corr[], Word16 scal_sig[], Word16 L_frame,  Word16 lag_max,  Word16 lag_min,   Word16 *cor_hp_max );
Word16 check_lsp(tonStabState *st,  Word16 *lsp);


#endif