nclass.h

关于AMR-WB+语音压缩编码的实现代码

#ifndef _NCLASS_H_
#define _NCLASS_H_

#include "../lib_amr/typedef.h"

#define TWINLEN (24-8)
#define LPHLEN 4
#define LPHAVELEN 8

#define TWINLENSHORT (4)
#define COMPLEN 12

// For debugging
#define COMPLEN2 12
#define CS 0

#define ACELP_MODE 0
#define TCX_MODE 1
#define TCX_OR_ACELP 2

typedef struct
{

    float levelHist[TWINLEN][COMPLEN];
    float averageHistTime[COMPLEN];
    float stdDevHistTime[COMPLEN];
    float averageHistTimeShort[COMPLEN];
    float stdDevHistTimeShort[COMPLEN];
    float lphBuf[LPHLEN];
    float lphAveBuf[LPHAVELEN];
    short prevModes[4];
    Word16 vadFlag[4];
    Word16 vadFlag_old[4];
    Word16 LTPLag[10];
    float NormCorr[10];
    float LTPGain[10];
    float TotalEnergy[5];
    short NoMtcx[2];
    short NbOfAcelps;
    float ApBuf[4 * M];
    float lph[4];
	short StatClassCount;

    Word16 LTPlagV[8];

} NCLASSDATA;

short classifyExcitation(NCLASSDATA * stClass, float level[], short sfIndex);
void classifyExcitationRef(NCLASSDATA * stClass, float *ISPs, short *coding_mod);

void initClassifyExcitation(NCLASSDATA * stClass);

#endif /*_NCLASS_H_*/