paramselect.c File Reference

Check and adjust parameter vector types. More...

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

Include dependency graph for paramselect.c:

Go to the source code of this file.

Functions
static void	init_mark (HTK_Param *param)
static void	free_mark ()
static void	mark_exclude_vector (int loc, int len)
static void	exec_exclude_vectors (HTK_Param *new, HTK_Param *src)
	Execute exclusion for a parameter data according to the exclusion marks.
int	exec_exclude_one_vector (VECT *vec, int len)
	Execute deletion for one vector according to the exlusion marks.
int	guess_basenum (HTK_Param *p, short qualtype)
boolean	select_param_vmark (HTK_Param *src, short dst_type_arg)
HTK_Param *	new_select_param_kind (HTK_Param *src, short dst_type_arg)
HTK_Param *	new_param_check_and_adjust (HTK_HMM_INFO *hmminfo, HTK_Param *param, boolean vflag)
	Top function to adjust parameter.
Variables
static int *	vmark
	Exclusion marks of input vector.
static int	vlen
	Length of above.
static int	vnewlen
	Adjusted new length.
static short	src_type
	Newly set source type.

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Detailed Description

Check and adjust parameter vector types.

Author:

Akinobu LEE

Date:

Sun Feb 13 20:46:39 2005

This file is to check if HMM parameter and input parameter are the same. If they are not the same, it then tries to modify the input to match the required format in HMM. Available parameter modification is only to delete some part of the parameter (ex. MFCC_E_D_Z (26 dim.) can be modified to MFCC_E_D_N_Z (25 dim.) by just deleting the absolute power). Note that no parameter generation or conversion is implemented currently.

The adjustment algorithm is as follows:

1. Initialize mark to 0 for each input vector element.
2. Compare parameter type and mark unnecessary element as EXCLUDE(=1).
3. Allocate a new parameter area and copy needed (=NOT marked) element.

Revision

1.1.1.1

Definition in file paramselect.c.

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Function Documentation

static void init_mark (  HTK_Param *  param  )  [static]

Allocate new area for exclusion marks. Parameters: param  [in] input parameter Definition at line 65 of file paramselect.c. Referenced by select_param_vmark().

static void free_mark (   )  [static]

Free the exclusion marks. Definition at line 80 of file paramselect.c. Referenced by new_select_param_kind().

static void mark_exclude_vector (  int  loc, int  len )  [static]

Put exlusion marks for vector for len elements from loc -th dimension. Parameters: loc  [in] beginning dimension to mark len  [in] number of dimension to mark from loc Definition at line 92 of file paramselect.c. Referenced by select_param_vmark().

static void exec_exclude_vectors (  HTK_Param *  new, HTK_Param *  src )  [static]

Execute exclusion for a parameter data according to the exclusion marks. Execute vector element exclusion by copying vector from src to new according to the current exclusion marks. The parameter vector of new will be newly allocated here. Parameters: new  [out] new adjusted parameter src  [in] source parameter Definition at line 129 of file paramselect.c. Referenced by new_select_param_kind().

int exec_exclude_one_vector (  VECT *  vec, int  len )

Execute deletion for one vector according to the exlusion marks. This can be used to frame-synchronous parameter adjustment. Parameters: vec  [I/O] target vector len  [in] length of above Returns: the new length. Definition at line 168 of file paramselect.c.

int guess_basenum (  HTK_Param *  p, short  qualtype )

Guess the length of the base coefficient according to the total vector length and parameter type. Parameters: p  [in] parameter data qualtype  [in] parameter type Returns: the guessed size of the base coefficient. Definition at line 195 of file paramselect.c. Referenced by guess_abs_e_location(), and select_param_vmark().

boolean select_param_vmark (  HTK_Param *  src, short  dst_type_arg )

Compare source parameter type and required type in HTK HMM, and set mark. Parameters: src  [in] input parameter dst_type_arg  [in] required parameter type Returns: TRUE on success, FALSE on failure. Definition at line 227 of file paramselect.c. Referenced by new_select_param_kind().

HTK_Param* new_select_param_kind (  HTK_Param *  src, short  dst_type_arg )

Extracts needed parameter vector specified in dst_type_arg from src, and returns newly allocated parameter structure. Parameters: src  [in] input parameter dst_type_arg  [in] required parameter type Returns: newly allocated adjusted parameter, NULL on failure. Definition at line 382 of file paramselect.c. Referenced by new_param_check_and_adjust().

HTK_Param* new_param_check_and_adjust (  HTK_HMM_INFO *  hmminfo, HTK_Param *  param, boolean  vflag )

Top function to adjust parameter. It compares the types for the given parameter param and HMM definition hmminfo. If type is not the same, adjustment will be tried. If adjustment is performed, the input param will be freed and the newly allocated adjusted parameter will be returned. Otherwise, the original param will be returned. Parameters: hmminfo  [in] HTK HMM definition param  [i/o] input parameter, will be freed if adjustment was performed in this function vflag  [in] if TRUE, output verbose messages Returns: the original param if no adjustment needed, newly allocated param is adjustment was needed and successfully done, NULL on failure (in case parameter type does not match even by the adjustment). Definition at line 429 of file paramselect.c. Referenced by main_recognition_loop().

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