libsent/src/phmm/gms.c File Reference

Calculate state probability with Gaussian Mixture Selection. More...

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

Go to the source code of this file.

Defines
#define	SD(A)   idx[A-1]
	Index macro for heap sort.
#define	SCOPY(D, S)   D = S
	Element copy macro for heap sort.
#define	SVAL(A)   (fs[idx[A-1]])
	Element evaluation macro for heap sort.
#define	STVAL   (fs[s])
	Element current value macro for heap sort.
Functions
static void	build_gsset (HMMWork *wrk)
	Register all state defs in GS HMM to GS_SET.
static void	free_gsset (HMMWork *wrk)
	Free gsset.
static boolean	build_state2gs (HMMWork *wrk)
	Build the correspondence from GS states to triphone states.
static void	free_state2gs (HMMWork *wrk)
	free state2gs.
static void	sort_gsindex_upward (HMMWork *wrk)
	Heap sort of gsindex to determine which model gets N best likelihoods.
static void	do_gms (HMMWork *wrk)
	Calculate all GS state scores and select the best ones.
boolean	gms_init (HMMWork *wrk)
	Initialize the GMS related functions and data.
boolean	gms_prepare (HMMWork *wrk, int framenum)
	Setup GMS parameters for next input.
void	gms_free (HMMWork *wrk)
	Free GMS related work areas.
LOGPROB	gms_state (HMMWork *wrk)
	Get HMM State probability of current state with Gaussiam Mixture Selection.

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Detailed Description

Calculate state probability with Gaussian Mixture Selection.

See the comments in the source for details about implementation.

Author:

Akinobu LEE

Date:

Thu Feb 17 14:52:18 2005

Revision

1.2

Definition in file gms.c.

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Function Documentation

static void build_gsset

(

HMMWork *

wrk

)

[static]

Register all state defs in GS HMM to GS_SET.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 87 of file gms.c.

Referenced by gms_init().

static void free_gsset

(

HMMWork *

wrk

)

[static]

Free gsset.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 107 of file gms.c.

Referenced by gms_free().

static boolean build_state2gs

(

HMMWork *

wrk

)

[static]

Build the correspondence from GS states to triphone states.

Parameters:

wrk

[i/o] HMM computation work area

Returns:

TRUE on success, FALSE on failure.

Definition at line 120 of file gms.c.

Referenced by gms_init().

static void free_state2gs

(

HMMWork *

wrk

)

[static]

free state2gs.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 176 of file gms.c.

Referenced by gms_free().

static void sort_gsindex_upward

(

HMMWork *

wrk

)

[static]

Heap sort of gsindex to determine which model gets N best likelihoods.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 195 of file gms.c.

Referenced by do_gms().

static void do_gms

(

HMMWork *

wrk

)

[static]

Calculate all GS state scores and select the best ones.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 250 of file gms.c.

Referenced by gms_state().

boolean gms_init

(

HMMWork *

wrk

)

Initialize the GMS related functions and data.

Parameters:

wrk

[i/o] HMM computation work area

Returns:

TRUE on success, FALSE on failure.

Definition at line 283 of file gms.c.

Referenced by outprob_init().

boolean gms_prepare	(	HMMWork *	wrk,
		int	framenum
	)

Setup GMS parameters for next input.

Parameters:

	wrk	[i/o] HMM computation work area
	framenum	[in] length of next input in frames

Returns:

TRUE on success, FALSE on failure.

Definition at line 330 of file gms.c.

Referenced by outprob_prepare().

void gms_free

(

HMMWork *

wrk

)

Free GMS related work areas.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 366 of file gms.c.

Referenced by outprob_free().

LOGPROB gms_state

(

HMMWork *

wrk

)

Get HMM State probability of current state with Gaussiam Mixture Selection.

If the GMS HMM score of the corresponding basephone is below the N-best, the triphone score will not be computed, and the score of the GMS HMM will be returned instead as a fallback score. Else, the precise triphone will be computed and returned.

Parameters:

wrk

[i/o] HMM computation work area

Returns:

the state output probability score in log10.

Definition at line 394 of file gms.c.

Referenced by outprob_init().

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