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- /*
- ********************************************************************************
- *
- * 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 : hp_max.h
- * Purpose : Find the maximum correlation of scal_sig[] in a given
- * delay range.
- *
- ********************************************************************************
- */
- #ifndef hp_max_h
- #define hp_max_h "$Id $"
-
- /*
- ********************************************************************************
- * INCLUDE FILES
- ********************************************************************************
- */
- #include "typedef.h"
- /*
- ********************************************************************************
- * DECLARATION OF PROTOTYPES
- ********************************************************************************
- */
- /*************************************************************************
- *
- * FUNCTION: hp_max
- *
- * PURPOSE: Find the maximum high-pass filtered correlation of
- * signal scal_sig[] in a given delay range.
- *
- * DESCRIPTION:
- * The correlation is given by
- * corr[t] = <scal_sig[n],scal_sig[n-t]>, t=lag_min,...,lag_max
- * The functions outputs the maximum high-pass filtered correlation
- * after normalization.
- *
- *************************************************************************/
- Word16 hp_max (
- Word32 corr[], /* i : correlation vector. */
- Word16 scal_sig[], /* i : scaled signal. */
- Word16 L_frame, /* i : length of frame to compute pitch */
- Word16 lag_max, /* i : maximum lag */
- Word16 lag_min, /* i : minimum lag */
- Word16 *cor_hp_max /* o : max high-pass filtered norm. correlation */
- );
- #endif
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