student.h

基于PCM和CVSD技术的语音编码仿真：在VC6.0环境下

/*==================================================================================================
Header Name: Student.h
General Description: Header codes of Student.c.
====================================================================================================
Semit
(c) Copyright SEMIT 2002, All Rights Reserved
Revision History:
Modification Tracking
------------------------- ------------ ---------- -------------------------------------------------
Author         Date       Number      Description of Changes
------------------------- ------------ ------------------------------------------------------------
Semit        08/5/2002    Unknown      A-Law PCM  and CVSD encode and decode functions declare
--------------------------------------------------------------------------------------------------*/
#ifndef STUDENT_H
#define STUDENT_H
/*====================================================================================================
INCLUDE FILES
==================================================================================================*/

/*==================================================================================================
MACRO DEFINATIONS
==================================================================================================*/
#define    STUDENT_DLL		extern "C"	__declspec( dllexport )
#define    PI      3.14159265358

/*==================================================================================================
STRUCTURES AND OTHER TYPEDEFS
==================================================================================================*/
typedef struct StudentCVSD{
	int    Encode[30];
	double Decode[30];
}STUDENT_CVSD, *PSTUDENT_CVSD;
/*==================================================================================================
CONSTANTS
==================================================================================================*/

/*==================================================================================================
EXPORT FUNCTION PROTOTYPES
==================================================================================================*/
STUDENT_DLL  unsigned char    PCM_StudentAlawEncode(int InputValue) ;
STUDENT_DLL  int              PCM_StudentAlawDecode(unsigned char CodeValue);
STUDENT_DLL  STUDENT_CVSD*    CVSD_StudentEncode(int Amplitude, int SampleTimes, int Frequency);
STUDENT_DLL  STUDENT_CVSD*    CVSD_StudentDecode(int SampleTimes);
/*================================================================================================*/

#endif/*STUDENT_H*/