FreeCalypso > hg > gsm-codec-lib

/*
*****************************************************************************
*
*      GSM AMR-NB speech codec   R98   Version 7.6.0   December 12, 2001
*                                R99   Version 3.3.0
*                                REL-4 Version 4.1.0
*
*****************************************************************************
*
*      File             : cor_h.h
*      Purpose          : correlation functions for codebook search
*
*****************************************************************************
*/
/*
*****************************************************************************
*                         MODULE INCLUDE FILE AND VERSION ID
*****************************************************************************
*/
#ifndef cor_h_h
#define cor_h_h "@(#)$Id $"
/*
*****************************************************************************
*                         INCLUDE FILES
*****************************************************************************
*/
#include "typedef.h"
#include "cnst.h"

/*
*****************************************************************************
*                         DECLARATION OF PROTOTYPES
*****************************************************************************
*/
void cor_h_x (
    Word16 h[],     /* (i) : impulse response of weighted synthesis filter */
    Word16 x[],     /* (i) : target                                        */
    Word16 dn[],    /* (o) : correlation between target and h[]            */
    Word16 sf       /* (i) : scaling factor: 2 for 12.2, 1 for 7.4         */
);

void cor_h_x2 (
    Word16 h[],     /* (i) : impulse response of weighted synthesis filter */
    Word16 x[],     /* (i) : target                                        */
    Word16 dn[],    /* (o) : correlation between target and h[]            */
    Word16 sf,      /* (i) : scaling factor: 2 for 12.2, 1 for 7.4         */
    Word16 nb_track,/* (i) : the number of ACB tracks                      */
    Word16 step     /* (i) : step size from one pulse position to the next
                             in one track                                  */
);

void cor_h (
    Word16 h[],     /* (i) : impulse response of weighted synthesis filter */
    Word16 sign[],      /* (i) : sign of d[n]                              */
    Word16 rr[][L_CODE] /* (o) : matrix of autocorrelation                 */
);

#endif
author	Mychaela Falconia <falcon@freecalypso.org>
date	Thu, 03 Oct 2024 08:22:41 +0000
parents	5401aaf7acb0
children