114 lines
3.8 KiB
C
114 lines
3.8 KiB
C
|
/*********************************************************************
|
||
|
|
Silence.H - Includes to use the code to detect silence.
|
||
|
|
|
||
|
|
begun 5/14/94 by Mike Rozak
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _SILENCE_H_
|
||
|
|
#define _SILENCE_H_
|
||
|
|
|
||
|
|
#ifndef _SPEECH_
|
||
|
|
typedef unsigned _int64 QWORD, *PQWORD;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*********************************************************************
|
||
|
|
Typedefs */
|
||
|
|
|
||
|
|
#define SIL_YES (2)
|
||
|
|
#define SIL_NO (0)
|
||
|
|
#define SIL_UNKNOWN (1)
|
||
|
|
|
||
|
|
// #define SIL_SAMPRATE (11025) // assumed sampling rate
|
||
|
|
#define PHADD_BEGIN_SILENCE (4) // 1/4 second
|
||
|
|
#define PCADD_BEGIN_SILENCE (4) // 1/4 second
|
||
|
|
#define FILTERNUM (1024) // max # samples i nthe filter
|
||
|
|
#if 0
|
||
|
|
#define MAXVOICEHZ (300) // maximum voice pitchm in hz
|
||
|
|
#define PHMAXVOICEHZ (300) // maximum voice pitch in hz (phone)
|
||
|
|
#endif
|
||
|
|
#define PHMAXVOICEHZ (500) // maximum voice pitch in hz (phone)
|
||
|
|
#define PCMAXVOICEHZ (500) // maximum voice pitch in hz (PC)
|
||
|
|
#define MINVOICEHZ (50) // minimum voice pitch in hz
|
||
|
|
|
||
|
|
// Store characteristics of a block
|
||
|
|
typedef struct {
|
||
|
|
WORD wMaxLevel;
|
||
|
|
WORD wMaxDelta;
|
||
|
|
BYTE bIsVoiced;
|
||
|
|
BYTE bHighLevel;
|
||
|
|
BYTE bHighDelta;
|
||
|
|
} BLOCKCHAR, *PBLOCKCHAR;
|
||
|
|
|
||
|
|
// Store information about a block
|
||
|
|
typedef struct {
|
||
|
|
short *pSamples; // Sample data, or NULL if empty
|
||
|
|
DWORD dwNumSamples; // number of samples in block
|
||
|
|
QWORD qwTimeStamp; // time stamp for block
|
||
|
|
} BINFO, *PBINFO;
|
||
|
|
|
||
|
|
class CSilence {
|
||
|
|
private:
|
||
|
|
WORD m_wBlocksPerSec;
|
||
|
|
WORD m_wBlocksInQueue;
|
||
|
|
WORD m_wLatestBlock; // points to the last block entered in the circular list
|
||
|
|
PBINFO m_paBlockInfo;
|
||
|
|
DWORD m_dwSoundBits;
|
||
|
|
DWORD m_dwVoicedBits; // turned on if block was voiced
|
||
|
|
BLOCKCHAR m_bcSilence; // what silence is
|
||
|
|
BOOL m_fFirstBlock; // TRUE if the next block is the first
|
||
|
|
// block ever, and used to judge silence, else FALSE
|
||
|
|
BOOL m_fInUtterance; // TRUE if we're in an utterance
|
||
|
|
DWORD m_dwUtteranceLength; // Number of frames that utterance has gone on
|
||
|
|
WORD m_wReaction; // reaction time
|
||
|
|
WORD m_wNoiseThresh; // noiuse threshhold
|
||
|
|
short *m_pASFiltered; // pointer to filtered data buffer
|
||
|
|
WORD m_wAddSilenceDiv;
|
||
|
|
DWORD m_dwHighFreq;
|
||
|
|
DWORD m_dwSamplesPerSec;
|
||
|
|
#ifdef USE_REG_ENG_CTRL
|
||
|
|
BOOL m_fSilenceDetectEnbl;
|
||
|
|
BOOL m_fVoiceDetectEnbl;
|
||
|
|
WORD m_wTimeToCheckDiv;
|
||
|
|
DWORD m_dwLowFreq;
|
||
|
|
DWORD m_dwCheckThisManySamples;
|
||
|
|
DWORD m_dwNumFilteredSamples;
|
||
|
|
WORD m_wMinConfidenceAdj;
|
||
|
|
DWORD m_dwLPFShift;
|
||
|
|
DWORD m_dwLPFWindow;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
public:
|
||
|
|
CSilence (WORD wBlocksPerSec);
|
||
|
|
~CSilence (void);
|
||
|
|
|
||
|
|
BOOL Init(BOOL fPhoneOptimized, DWORD dwSamplesPerSec);
|
||
|
|
BOOL AddBlock (short * pSamples, DWORD dwNumSamples, WORD * wVU,
|
||
|
|
QWORD qwTimeStamp);
|
||
|
|
short * GetBlock (DWORD * pdwNumSamples, QWORD * pqwTimeStamp);
|
||
|
|
void KillUtterance(void);
|
||
|
|
void NoiseResistSet (WORD wValue)
|
||
|
|
{
|
||
|
|
m_wNoiseThresh = wValue;
|
||
|
|
};
|
||
|
|
void ReactionTimeSet (DWORD dwTime)
|
||
|
|
{m_wReaction = (WORD) ((dwTime * m_wBlocksPerSec) / 1000);};
|
||
|
|
WORD GetBackgroundNoise (void)
|
||
|
|
{return m_bcSilence.wMaxLevel;};
|
||
|
|
void ExpectNoiseChange (WORD wValue);
|
||
|
|
|
||
|
|
private:
|
||
|
|
BOOL CSilence::IsSegmentVoiced (short *pSamples, DWORD dwNumSamples,
|
||
|
|
DWORD dwSamplesPerSec, WORD wMinConfidence, short *asFiltered);
|
||
|
|
BOOL CSilence::WhatsTheNewState (DWORD dwSoundBits, DWORD dwVoicedBits,
|
||
|
|
BOOL fWasInUtterance, BOOL fLongUtterance,
|
||
|
|
WORD wBlocksPerSec, WORD *wStarted, WORD wReaction);
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef CSilence *PCSilence;
|
||
|
|
|
||
|
|
WORD NEAR PASCAL TrimMaxAmp(short * lpS, DWORD dwNum);
|
||
|
|
|
||
|
|
#endif // _SILENCE_H_
|