libsent/src/phmm/outprob.c

音響尤度計算の実行および状態レベルキャッシュ [詳細]

#include <sent/stddefs.h>
#include <sent/speech.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 LOG_UNDEF (LOG_ZERO - 1)

Value to be used as the initial cache value

関数

boolean outprob_cache_init (HMMWork *wrk)

Initialize the cache data, should be called once on startup.

boolean outprob_cache_prepare (HMMWork *wrk)

Prepare cache for the next input, by clearing the existing cache.

static void outprob_cache_extend (HMMWork *wrk, int reqframe)

Expand the cache to time axis if needed.

void outprob_cache_free (HMMWork *wrk)

Free work area for cache.

LOGPROB outprob_state (HMMWork *wrk, int t, HTK_HMM_State *stateinfo, HTK_Param *param)

Compute output probability of a state.

void outprob_cd_nbest_init (HMMWork *wrk, int num)

Initialize work area for outprob_cd_nbest().

void outprob_cd_nbest_free (HMMWork *wrk)

Free work area for outprob_cd_nbest().

static LOGPROB outprob_cd_nbest (HMMWork *wrk, int t, CD_State_Set *lset, HTK_Param *param)

Return average of N-beat outprob for pseudo state set.

static LOGPROB outprob_cd_max (HMMWork *wrk, int t, CD_State_Set *lset, HTK_Param *param)

Return maximum outprob of the pseudo state set.

static LOGPROB outprob_cd_avg (HMMWork *wrk, int t, CD_State_Set *lset, HTK_Param *param)

Return average outprob of the pseudo state set.

LOGPROB outprob_cd (HMMWork *wrk, int t, CD_State_Set *lset, HTK_Param *param)

Compute the log output probability of a pseudo state set.

LOGPROB outprob (HMMWork *wrk, int t, HMM_STATE *hmmstate, HTK_Param *param)

Top function to compute the output probability of a HMM state.

説明

音響尤度計算の実行および状態レベルキャッシュ

HMM の状態の出力確率（対数尤度）を計算します．状態の型（単語末端の pseudo HMM set かどうか）にしたがっていくつか定義されていますが，全て下位の outprob_state() を呼びます．outprob_state() は必要な情報を OP_ で始まる大域変数に格納し，calc_outprob_state() を呼び出します．calc_outprob_state() は関数のポインタであり，実体は tied-mixture モデルの場合 calc_tied_mix(), それ以外の場合は calc_mix() となります．（GMS を使用する場合は gms_state()）になります．

状態レベルの音響尤度キャッシュが行なわれます．キャッシュは状態 x 入力フレームで格納され，必要な長さにしたがって伸長されます．このキャッシュは第2パスの計算でも用いるため，全時間に渡って記録されています．

なお tied-mixture の場合はコードブックレベルでのキャッシュも同時に行なわれます．これについては calc_tied_mix.c をご覧下さい．

作者:: Akinobu LEE

日付:: Fri Feb 18 18:45:21 2005

Revision: 1.3

outprob.c で定義されています。

関数

boolean outprob_cache_init ( HMMWork * wrk )

Initialize the cache data, should be called once on startup.

引数:

wrk

[i/o] HMM computation work area

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

outprob.c の 78 行で定義されています。

参照元 outprob_init().

boolean outprob_cache_prepare ( HMMWork * wrk )

Prepare cache for the next input, by clearing the existing cache.

引数:

wrk

[i/o] HMM computation work area

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

outprob.c の 96 行で定義されています。

参照元 outprob_prepare().

static void outprob_cache_extend	(	HMMWork *	wrk,
		int	reqframe
	)			`[static]`

Expand the cache to time axis if needed.

引数:

	wrk	[i/o] HMM computation work area
	reqframe	[in] required frame length

outprob.c の 117 行で定義されています。

参照元 outprob_state().

void outprob_cache_free ( HMMWork * wrk )

Free work area for cache.

引数:

wrk

[i/o] HMM computation work area

outprob.c の 158 行で定義されています。

参照元 outprob_free().

LOGPROB outprob_state	(	HMMWork *	wrk,
		int	t,
		HTK_HMM_State *	stateinfo,
		HTK_Param *	param
	)

Compute output probability of a state.

Set the needed values to the global variables that begins with "OP_", and call calc_outprob_state(). The calc_outprob_state() is actually a function pointer, and the entity is either calc_tied_mix() for tied-mixture model and calc_mix() for others. (If you use GMS, the entity will be gms_state() instead.)

The state-level cache is also consulted here.

引数:

	wrk	[i/o] HMM computation work area
	t	[in] time frame
	stateinfo	[in] state information to compute the output probability
	param	[in] input parameter vectors

戻り値:: output log probability.

outprob.c の 184 行で定義されています。

参照元 outprob()・outprob_cd_avg()・outprob_cd_max()・outprob_cd_nbest()・outprob_style()・start_word().

void outprob_cd_nbest_init	(	HMMWork *	wrk,
		int	num
	)

Initialize work area for outprob_cd_nbest().

引数:

	wrk	[i/o] HMM computation work area
	num	[in] number of top states to be calculated.

outprob.c の 222 行で定義されています。

参照元 outprob_init().

void outprob_cd_nbest_free ( HMMWork * wrk )

Free work area for outprob_cd_nbest().

引数:

wrk

[i/o] HMM computation work area

outprob.c の 235 行で定義されています。

参照元 outprob_free().

static LOGPROB outprob_cd_nbest	(	HMMWork *	wrk,
		int	t,
		CD_State_Set *	lset,
		HTK_Param *	param
	)			`[static]`

Return average of N-beat outprob for pseudo state set.

引数:

	wrk	[i/o] HMM computation work area
	t	[in] input frame
	lset	[in] pseudo state set
	param	[in] input parameter data

戻り値:: outprob log probability, average of top N states in lset.

outprob.c の 251 行で定義されています。

参照元 outprob_cd().

static LOGPROB outprob_cd_max	(	HMMWork *	wrk,
		int	t,
		CD_State_Set *	lset,
		HTK_Param *	param
	)			`[static]`

Return maximum outprob of the pseudo state set.

引数:

	wrk	[i/o] HMM computation work area
	t	[in] input frame
	lset	[in] pseudo state set
	param	[in] input parameter data

戻り値:: maximum output log probability among states in lset.

outprob.c の 296 行で定義されています。

参照元 outprob_cd().

static LOGPROB outprob_cd_avg	(	HMMWork *	wrk,
		int	t,
		CD_State_Set *	lset,
		HTK_Param *	param
	)			`[static]`

Return average outprob of the pseudo state set.

引数:

	wrk	[i/o] HMM computation work area
	t	[in] input frame
	lset	[in] pseudo state set
	param	[in] input parameter data

戻り値:: average output log probability of states in lset.

outprob.c の 320 行で定義されています。

参照元 outprob_cd().

LOGPROB outprob_cd	(	HMMWork *	wrk,
		int	t,
		CD_State_Set *	lset,
		HTK_Param *	param
	)

Compute the log output probability of a pseudo state set.

引数:

	wrk	[i/o] HMM computation work area
	t	[in] input frame
	lset	[in] pseudo state set
	param	[in] input parameter data

戻り値:: the computed log output probability.

outprob.c の 347 行で定義されています。

参照元 outprob()・outprob_style()・start_word().

LOGPROB outprob	(	HMMWork *	wrk,
		int	t,
		HMM_STATE *	hmmstate,
		HTK_Param *	param
	)

Top function to compute the output probability of a HMM state.

引数:

	wrk	[i/o] HMM computation work area
	t	[in] input frame
	hmmstate	[in] HMM state
	param	[in] input parameter data

戻り値:: the computed log output probability.

outprob.c の 378 行で定義されています。

参照元 viterbi_segment().

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

1.5.1


マクロ定義
#define	LOG_UNDEF (LOG_ZERO - 1)
	Value to be used as the initial cache value
関数
boolean	outprob_cache_init (HMMWork *wrk)
	Initialize the cache data, should be called once on startup.
boolean	outprob_cache_prepare (HMMWork *wrk)
	Prepare cache for the next input, by clearing the existing cache.
static void	outprob_cache_extend (HMMWork *wrk, int reqframe)
	Expand the cache to time axis if needed.
void	outprob_cache_free (HMMWork *wrk)
	Free work area for cache.
LOGPROB	outprob_state (HMMWork wrk, int t, HTK_HMM_State stateinfo, HTK_Param *param)
	Compute output probability of a state.
void	outprob_cd_nbest_init (HMMWork *wrk, int num)
	Initialize work area for outprob_cd_nbest().
void	outprob_cd_nbest_free (HMMWork *wrk)
	Free work area for outprob_cd_nbest().
static LOGPROB	outprob_cd_nbest (HMMWork wrk, int t, CD_State_Set lset, HTK_Param *param)
	Return average of N-beat outprob for pseudo state set.
static LOGPROB	outprob_cd_max (HMMWork wrk, int t, CD_State_Set lset, HTK_Param *param)
	Return maximum outprob of the pseudo state set.
static LOGPROB	outprob_cd_avg (HMMWork wrk, int t, CD_State_Set lset, HTK_Param *param)
	Return average outprob of the pseudo state set.
LOGPROB	outprob_cd (HMMWork wrk, int t, CD_State_Set lset, HTK_Param *param)
	Compute the log output probability of a pseudo state set.
LOGPROB	outprob (HMMWork wrk, int t, HMM_STATE hmmstate, HTK_Param *param)
	Top function to compute the output probability of a HMM state.