vad.h

ITU-T在1996年3月公布了G.729建议的8Kbit/s共轭结构代数码激励线性预测（CS-ACELP）语音编码方案

/*
    ITU-T G.729 Annex I  - Reference C code for fixed point
                         implementation of G.729 Annex I
                         Version 1.1 of October 1999
*/
/*
 File : vad.h
 */

/* from vad.h G729 Annex B Version 1.3  Last modified: August 1997 */
/*
   ITU-T G.729 Annex B     ANSI-C Source Code
   Version 1.3    Last modified: August 1997

   Copyright (c) 1996, France Telecom, Rockwell International,
                       Universite de Sherbrooke.
   All rights reserved.
*/

#define     NP            12                  /* Increased LPC order */
#define     NOISE         0
#define     VOICE         1
#define     INIT_FRAME    32
#define     INIT_COUNT    20
#define     ZC_START      120
#define     ZC_END        200

void vad_init(void);

void vad(
         Word16 rc,
         Word16 *lsf, 
         Word16 *r_h,
         Word16 *r_l,
         Word16 exp_R0,
         Word16 *sigpp,
         Word16 frm_count,
         Word16 prev_marker,
         Word16 pprev_marker,
         Word16 *marker,
         Word16 *ENERGY_db);