libsent/src/phmm/gms_gprune.c File Reference

Calculate the GMS monophone HMM for Gaussian Mixture Selection using Gaussian pruning. 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	GS_MAX_PROB
	Compute only max for GS states.
#define	LAST_BEST
	Compute last best Gaussians first.
Functions
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.

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Detailed Description

Calculate the GMS monophone HMM for Gaussian Mixture Selection using Gaussian pruning.

Author:

Akinobu LEE

Date:

Thu Feb 17 15:05:08 2005

Revision

1.4

Definition in file gms_gprune.c.

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Function Documentation

void gms_gprune_init

(

HMMWork *

wrk

)

Initialization of GMS HMM likelihood computation.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 43 of file gms_gprune.c.

Referenced by gms_init().

void gms_gprune_prepare

(

HMMWork *

wrk

)

Prepare GMS HMM computation for the next speech input.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 59 of file gms_gprune.c.

Referenced by gms_prepare().

void gms_gprune_free

(

HMMWork *

wrk

)

Free GMS related work area.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 76 of file gms_gprune.c.

Referenced by gms_free().

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

Compute only max by safe pruning.

Parameters:

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

Returns:

the computed likelihood.

Definition at line 95 of file gms_gprune.c.

Referenced by 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.

Parameters:

	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.

Returns:

the log likelihood.

Definition at line 133 of file gms_gprune.c.

Referenced by 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.

Parameters:

wrk

[i/o] HMM computation work area

Definition at line 238 of file gms_gprune.c.

Referenced by do_gms().

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