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

Include dependency graph for gms_gprune.c:

Go to the source code of this file.

Defines
#define	GS_MAX_PROB
	Compute only max for GS states.
#define	LAST_BEST
	Enable beam pruning.
#define	BEAM_OFFSET   10.0
	Beam offset, used when BEAM enabled.
#define	GS_MAX_PROB
	Compute only max for GS states.
Functions
void	gms_gprune_init (HTK_HMM_INFO *hmminfo, int gsset_num)
void	gms_gprune_prepare ()
static LOGPROB	calc_contprob_with_safe_pruning (HTK_HMM_Dens *binfo, LOGPROB thres)
static LOGPROB	compute_g_max (HTK_HMM_State *stateinfo, int last_maxi, int *maxi_ret)
void	compute_gs_scores (GS_SET *gsset, int gsset_num, LOGPROB *scores_ret)
Variables
static int	my_gsset_num
	num of gsset states (local copy)
static int *	last_max_id
	maximum mixture id of last call for each states

---

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

1.1.1.1

Definition in file gms_gprune.c.

---

Define Documentation

#define LAST_BEST

Enable beam pruning. Compute last best Gaussians first Definition at line 33 of file gms_gprune.c.

---

Function Documentation

void gms_gprune_init (  HTK_HMM_INFO *  hmminfo, int  gsset_num )

Initialization of GMS HMM likelihood computation. Parameters: hmminfo  [in] GMS HMM definition gsset_num  [in] number of states in GMS HMM Definition at line 60 of file gms_gprune.c. Referenced by gms_init().

void gms_gprune_prepare (   )

Prepare GMS HMM computation for the next speech input. Definition at line 75 of file gms_gprune.c. Referenced by gms_prepare().

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

Compute only max by safe pruning Parameters: 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 (  HTK_HMM_State *  stateinfo, int  last_maxi, int *  maxi_ret )  [static]

Compute log output likelihood of a state. Only maximum Gaussian will be computed. Parameters: 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 201 of file gms_gprune.c. Referenced by compute_gs_scores().

void compute_gs_scores (  GS_SET *  gsset, int  gsset_num, LOGPROB *  scores_ret )

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: gsset  [in] list of GMS HMM state set. gsset_num  [in] length of above scores_ret  [out] array of scores for each GMS HMM state Definition at line 293 of file gms_gprune.c. Referenced by do_gms().

---