libsent/src/phmm/gms_gprune.c

Gaussian Mixture Selection のための Gaussian pruning を用いたモノフォンHMMの計算 [詳細]

#include <sent/stddefs.h>
#include <sent/htk_hmm.h>
#include <sent/htk_param.h>
#include <sent/hmm.h>
#include <sent/hmm_calc.h>

ソースコードを見る。

マクロ定義
#define	GS_MAX_PROB
	Compute only max for GS states.
#define	LAST_BEST
	Compute last best Gaussians first.
関数
void	gms_gprune_init (HMMWork *wrk)
	Initialization of GMS HMM likelihood computation.
void	gms_gprune_prepare (HMMWork *wrk)
	Prepare GMS HMM computation for the next speech input.
void	gms_gprune_free (HMMWork *wrk)
	Free GMS related work area.
static LOGPROB	calc_contprob_with_safe_pruning (HMMWork *wrk, HTK_HMM_Dens *binfo, LOGPROB thres)
	Compute only max by safe pruning.
static LOGPROB	compute_g_max (HMMWork *wrk, HTK_HMM_State *stateinfo, int *last_maxi)
	Compute log output likelihood of a state.
void	compute_gs_scores (HMMWork *wrk)
	Main function to compute all the GMS HMM states in a frame with the input vectore specified by OP_vec.

---

説明

Gaussian Mixture Selection のための Gaussian pruning を用いたモノフォンHMMの計算

作者:

Akinobu LEE

日付:

Thu Feb 17 15:05:08 2005

Revision:

1.4

gms_gprune.c で定義されています。

---

関数

void gms_gprune_init

(

HMMWork *

wrk

)

Initialization of GMS HMM likelihood computation.

引数:

wrk	[i/o] HMM computation work area

gms_gprune.c の 43 行で定義されています。

参照元 gms_init().

void gms_gprune_prepare

(

HMMWork *

wrk

)

Prepare GMS HMM computation for the next speech input.

引数:

wrk	[i/o] HMM computation work area

gms_gprune.c の 59 行で定義されています。

参照元 gms_prepare().

void gms_gprune_free

(

HMMWork *

wrk

)

Free GMS related work area.

引数:

wrk	[i/o] HMM computation work area

gms_gprune.c の 76 行で定義されています。

参照元 gms_free().

static LOGPROB calc_contprob_with_safe_pruning	(	HMMWork *	wrk,
		HTK_HMM_Dens *	binfo,
		LOGPROB	thres
	)		[static]

Compute only max by safe pruning.

引数:

wrk	[i/o] HMM computation work area
binfo	[in] Gaussian density
thres	[in] constant pruning threshold

戻り値:

the computed likelihood.

gms_gprune.c の 95 行で定義されています。

参照元 compute_g_max().

static LOGPROB compute_g_max	(	HMMWork *	wrk,
		HTK_HMM_State *	stateinfo,
		int *	last_maxi
	)		[static]

Compute log output likelihood of a state.

Only maximum Gaussian will be computed.

引数:

wrk	[i/o] HMM computation work area
stateinfo	[in] HMM state to compute
last_maxi	[in] the mixture id that got the maximum value at the previous frame, or -1 if not exist.
maxi_ret	[out] tue mixture id that get the maximum value at this call.

戻り値:

the log likelihood.

gms_gprune.c の 133 行で定義されています。

参照元 compute_gs_scores().

void compute_gs_scores

(

HMMWork *

wrk

)

Main function to compute all the GMS HMM states in a frame with the input vectore specified by OP_vec.

This function assumes that this will be called for sequencial frame, since it utilizes the result of previous frame for faster pruning.

引数:

wrk	[i/o] HMM computation work area

gms_gprune.c の 238 行で定義されています。

参照元 do_gms().