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/gprune.h>
#include "globalvars.h"

Include dependency graph for gms.c:

Go to the source code of this file.

Defines
#define	MAXHMMNAMELEN   40
	Assumed maximum length of HMM name.
#define	SD(A)   gsindex[A-1]
	Index macro for heap sort.
#define	SCOPY(D, S)   D = S
	Element copy macro for heap sort.
#define	SVAL(A)   (t_fs[gsindex[A-1]])
	Element evaluation macro for heap sort.
#define	STVAL   (t_fs[s])
	Element current value macro for heap sort.
Functions
static void	build_gsset ()
static boolean	build_state2gs ()
static void	sort_gsindex_upward (int neednum, int totalnum)
static void	do_gms ()
boolean	gms_init (int nbest)
boolean	gms_prepare (int framenum)
LOGPROB	gms_state ()
Variables
static int	my_nbest
	Number of states to be selected.
static int	allocframenum
	Allocated number of frame for storing fallback scores per frame.
static GS_SET *	gsset
	Set of GS states.
static int	gsset_num
	Num of above.
static int *	state2gs
	Mapping from triphone state id to gs id.
static boolean *	is_selected
	TRUE if the frame is already selected.
static LOGPROB **	fallback_score = NULL
	[t][gssetid], LOG_ZERO if selected
static int *	gsindex
	Index buffer.
static LOGPROB *	t_fs
	Current fallback_score.

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Detailed Description

Calculate state probability with Gaussian Mixture Selection.

Author:

Akinobu LEE

Date:

Thu Feb 17 14:52:18 2005

See the comments in the source for details about implementation.

Revision

1.1.1.1

Definition in file gms.c.

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Function Documentation

static void build_gsset (   )  [static]

Register all state defs in GS HMM to GS_SET. Definition at line 102 of file gms.c. Referenced by gms_init().

static boolean build_state2gs (   )  [static]

Build the correspondence from GS states to triphone states. Returns: TRUE on success, FALSE on failure. Definition at line 123 of file gms.c. Referenced by gms_init().

static void sort_gsindex_upward (  int  neednum, int  totalnum )  [static]

Heap sort of gsindex to determine which model gets N best likelihoods. Parameters: neednum  [in] needed number N totalnum  [in] total number of data Definition at line 185 of file gms.c. Referenced by do_gms().

static void do_gms (   )  [static]

Calculate all GS state scores and select the best ones. Definition at line 229 of file gms.c. Referenced by gms_state().

boolean gms_init (  int  nbest  )

Initialize the GMS related functions and data. Parameters: nbest  [in] N-best state to compute the precise triphone. Returns: TRUE on success, FALSE on failure. Definition at line 262 of file gms.c. Referenced by outprob_init().

boolean gms_prepare (  int  framenum  )

Setup GMS parameters for next input. Parameters: framenum  [in] length of next input in frames Returns: TRUE on success, FALSE on failure. Definition at line 312 of file gms.c. Referenced by outprob_prepare().

LOGPROB gms_state (   )

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. Returns: the state output probability score in log10. Definition at line 352 of file gms.c. Referenced by outprob_init().

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