FreeCalypso > hg > gsm-codec-lib
diff libtwamr/hp_max.h @ 379:176a44ff94a1
libtwamr: integrate hp_max.c
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Mon, 06 May 2024 05:10:03 +0000 |
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| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/hp_max.h Mon May 06 05:10:03 2024 +0000 @@ -0,0 +1,53 @@ +/* +******************************************************************************** +* +* 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