libsent/src/wav2mfcc/wav2mfcc-pipe.c

音声波形から MFCC 特徴量へ変換する (フレーム単位) [詳細]

#include <sent/stddefs.h>
#include <sent/mfcc.h>
#include <sent/htk_param.h>

ソースコードを見る。

関数

DeltaBuf * WMP_deltabuf_new (int veclen, int windowlen)

Allocate a new delta cycle buffer.

void WMP_deltabuf_free (DeltaBuf *db)

Destroy the delta cycle buffer.

void WMP_deltabuf_prepare (DeltaBuf *db)

Reset and clear the delta cycle buffer.

static void WMP_deltabuf_calc (DeltaBuf *db, int cur)

Calculate delta coefficients of the specified point in the cycle buffer.

boolean WMP_deltabuf_proceed (DeltaBuf *db, float *new_mfcc)

Store the given MFCC vector into the delta cycle buffer, and compute the latest delta coefficients.

boolean WMP_deltabuf_flush (DeltaBuf *db)

Flush the delta cycle buffer the delta coefficients left in the cycle buffer.

CMNWork * CMN_realtime_new (Value *para, float weight)

Initialize MAP-CMN at startup.

void CMN_realtime_free (CMNWork *c)

Free work area for real-time CMN.

void CMN_realtime_prepare (CMNWork *c)

Prepare for MAP-CMN at start of each input

void CMN_realtime (CMNWork *c, float *mfcc)

Perform MAP-CMN for incoming MFCC vectors

void CMN_realtime_update (CMNWork *c, HTK_Param *param)

Update initial cepstral mean from previous utterances for next input.

static boolean myread (void *buf, size_t unitbyte, int unitnum, FILE *fp)

Read binary with byte swap (assume file is Big Endian)

static boolean mywrite (void *buf, size_t unitbyte, size_t unitnum, int fd)

Write binary with byte swap (assume data is Big Endian)

boolean CMN_load_from_file (CMNWork *c, char *filename)

Load CMN parameter from file.

boolean CMN_save_to_file (CMNWork *c, char *filename)

Save the current CMN vector to a file.

void energy_max_init (ENERGYWork *energy)

Initialize work area for energy normalization on live input.

void energy_max_prepare (ENERGYWork *energy, Value *para)

Prepare values for energy normalization on live input.

LOGPROB energy_max_normalize (ENERGYWork *energy, LOGPROB f, Value *para)

Peform energy normalization using maximum of last input.

説明

音声波形から MFCC 特徴量へ変換する (フレーム単位)

ここでは wav2mfcc.c の関数をフレーム同期に処理するために変換した関数が納められています．認識処理を音声入力と平行して行う場合，こちらの関数が用いられます．

作者:: Akinobu LEE

日付:: Thu Feb 17 18:12:30 2005

Revision: 1.3

wav2mfcc-pipe.c で定義されています。

関数

DeltaBuf* WMP_deltabuf_new	(	int	veclen,
		int	windowlen
	)

Allocate a new delta cycle buffer.

引数:

	veclen	[in] length of a vector
	windowlen	[in] window width for computing delta

戻り値:: pointer to newly allocated delta cycle buffer structure.

wav2mfcc-pipe.c の 60 行で定義されています。

参照元 RealTimeInit().

void WMP_deltabuf_free ( DeltaBuf * db )

Destroy the delta cycle buffer.

引数:

[i/o] delta cycle buffer

wav2mfcc-pipe.c の 87 行で定義されています。

参照元 j_mfcccalc_free().

void WMP_deltabuf_prepare ( DeltaBuf * db )

Reset and clear the delta cycle buffer.

引数:

[i/o] delta cycle buffer

wav2mfcc-pipe.c の 105 行で定義されています。

参照元 reset_mfcc().

static void WMP_deltabuf_calc	(	DeltaBuf *	db,
		int	cur
	)			`[static]`

Calculate delta coefficients of the specified point in the cycle buffer.

引数:

	db	[i/o] delta cycle buffer
	cur	[in] target point to calculate the delta coefficients

wav2mfcc-pipe.c の 121 行で定義されています。

参照元 WMP_deltabuf_flush()・WMP_deltabuf_proceed().

boolean WMP_deltabuf_proceed	(	DeltaBuf *	db,
		float *	new_mfcc
	)

Store the given MFCC vector into the delta cycle buffer, and compute the latest delta coefficients.

引数:

	db	[i/o] delta cycle buffer
	new_mfcc	[in] MFCC vector

戻り値:: TRUE if next delta coeff. computed, in that case it is saved in db->delta[], or FALSE if delta is not yet computed by short of data.

wav2mfcc-pipe.c の 164 行で定義されています。

参照元 RealTimeMFCC()・RealTimeParam().

boolean WMP_deltabuf_flush ( DeltaBuf * db )

Flush the delta cycle buffer the delta coefficients left in the cycle buffer.

引数:

[i/o] delta cycle buffer

戻り値:: TRUE if next delta coeff. computed, in that case it is saved in db->delta[], or FALSE if all delta computation has been flushed and no data is available.

wav2mfcc-pipe.c の 206 行で定義されています。

参照元 RealTimeParam().

CMNWork* CMN_realtime_new	(	Value *	para,
		float	weight
	)

Initialize MAP-CMN at startup.

引数:

	para	[in] MFCC computation configuration parameter
	weight	[in] initial cepstral mean weight

wav2mfcc-pipe.c の 247 行で定義されています。

参照元 RealTimeInit().

void CMN_realtime_free ( CMNWork * c )

Free work area for real-time CMN.

引数:

[i/o] CMN calculation work area

wav2mfcc-pipe.c の 285 行で定義されています。

参照元 j_mfcccalc_free().

void CMN_realtime_prepare ( CMNWork * c )

Prepare for MAP-CMN at start of each input

引数:

[i/o] CMN calculation work area

wav2mfcc-pipe.c の 309 行で定義されています。

参照元 init_param()・RealTimeResume().

void CMN_realtime	(	CMNWork *	c,
		float *	mfcc
	)

Perform MAP-CMN for incoming MFCC vectors

引数:

	c	[i/o] CMN calculation work area
	mfcc	[in] MFCC vector

wav2mfcc-pipe.c の 328 行で定義されています。

参照元 RealTimeMFCC()・RealTimeParam().

void CMN_realtime_update	(	CMNWork *	c,
		HTK_Param *	param
	)

Update initial cepstral mean from previous utterances for next input.

引数:

[i/o] CMN calculation work area

wav2mfcc-pipe.c の 389 行で定義されています。

参照元 RealTimeCMNUpdate().

static boolean myread	(	void *	buf,
		size_t	unitbyte,
		int	unitnum,
		FILE *	fp
	)			`[static]`

Read binary with byte swap (assume file is Big Endian)

引数:

	buf	[out] data buffer
	unitbyte	[in] size of unit in bytes
	unitnum	[in] number of units to be read
	fp	[in] file pointer

戻り値:: TRUE if required number of units are fully read, FALSE if failed.

wav2mfcc-pipe.c の 476 行で定義されています。

static boolean mywrite	(	void *	buf,
		size_t	unitbyte,
		size_t	unitnum,
		int	fd
	)			`[static]`

Write binary with byte swap (assume data is Big Endian)

引数:

	buf	[in] data buffer
	unitbyte	[in] size of unit in bytes
	unitnum	[in] number of units to write
	fd	[in] file descriptor

戻り値:: TRUE if required number of units are fully written, FALSE if failed.

wav2mfcc-pipe.c の 498 行で定義されています。

boolean CMN_load_from_file	(	CMNWork *	c,
		char *	filename
	)

Load CMN parameter from file.

If the number of MFCC dimension in the file does not match the specified one, an error will occur.

引数:

	c	[i/o] CMN calculation work area
	filename	[in] file name

戻り値:: TRUE on success, FALSE on failure.

wav2mfcc-pipe.c の 522 行で定義されています。

参照元 RealTimeInit().

boolean CMN_save_to_file	(	CMNWork *	c,
		char *	filename
	)

Save the current CMN vector to a file.

引数:

	c	[i/o] CMN calculation work area
	filename	[in] filename to save the data.

戻り値:: TRUE on success, FALSE on failure.

wav2mfcc-pipe.c の 579 行で定義されています。

参照元 RealTimeCMNUpdate().

void energy_max_init ( ENERGYWork * energy )

Initialize work area for energy normalization on live input.

This should be called once on startup.

引数:

energy

[in] energy normalization work area

wav2mfcc-pipe.c の 629 行で定義されています。

参照元 RealTimeInit().

void energy_max_prepare	(	ENERGYWork *	energy,
		Value *	para
	)

Prepare values for energy normalization on live input.

This should be called before each input segment.

引数:

	energy	[in] energy normalization work area
	para	[in] MFCC computation configuration parameter

wav2mfcc-pipe.c の 642 行で定義されています。

参照元 reset_mfcc().

LOGPROB energy_max_normalize	(	ENERGYWork *	energy,
		LOGPROB	f,
		Value *	para
	)

Peform energy normalization using maximum of last input.

引数:

	energy	[in] energy normalization work area
	f	[in] raw energy
	para	[in] MFCC computation configuration parameter

戻り値:: value of the normalized log energy.

wav2mfcc-pipe.c の 659 行で定義されています。

参照元 RealTimeMFCC().

Juliusに対してThu Jul 23 12:17:08 2009に生成されました。

1.5.1


関数
DeltaBuf *	WMP_deltabuf_new (int veclen, int windowlen)
	Allocate a new delta cycle buffer.
void	WMP_deltabuf_free (DeltaBuf *db)
	Destroy the delta cycle buffer.
void	WMP_deltabuf_prepare (DeltaBuf *db)
	Reset and clear the delta cycle buffer.
static void	WMP_deltabuf_calc (DeltaBuf *db, int cur)
	Calculate delta coefficients of the specified point in the cycle buffer.
boolean	WMP_deltabuf_proceed (DeltaBuf db, float new_mfcc)
	Store the given MFCC vector into the delta cycle buffer, and compute the latest delta coefficients.
boolean	WMP_deltabuf_flush (DeltaBuf *db)
	Flush the delta cycle buffer the delta coefficients left in the cycle buffer.
CMNWork *	CMN_realtime_new (Value *para, float weight)
	Initialize MAP-CMN at startup.
void	CMN_realtime_free (CMNWork *c)
	Free work area for real-time CMN.
void	CMN_realtime_prepare (CMNWork *c)
	Prepare for MAP-CMN at start of each input
void	CMN_realtime (CMNWork c, float mfcc)
	Perform MAP-CMN for incoming MFCC vectors
void	CMN_realtime_update (CMNWork c, HTK_Param param)
	Update initial cepstral mean from previous utterances for next input.
static boolean	myread (void buf, size_t unitbyte, int unitnum, FILE fp)
	Read binary with byte swap (assume file is Big Endian)
static boolean	mywrite (void *buf, size_t unitbyte, size_t unitnum, int fd)
	Write binary with byte swap (assume data is Big Endian)
boolean	CMN_load_from_file (CMNWork c, char filename)
	Load CMN parameter from file.
boolean	CMN_save_to_file (CMNWork c, char filename)
	Save the current CMN vector to a file.
void	energy_max_init (ENERGYWork *energy)
	Initialize work area for energy normalization on live input.
void	energy_max_prepare (ENERGYWork energy, Value para)
	Prepare values for energy normalization on live input.
LOGPROB	energy_max_normalize (ENERGYWork energy, LOGPROB f, Value para)
	Peform energy normalization using maximum of last input.