check_hmm_restriction.c File Reference

Check if the given HMM definition file can be used. More...

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

Include dependency graph for check_hmm_restriction.c:

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Defines
#define	GOOD   0
	Mark transition as allowed.
#define	FIXED   1
	Mark fixed transition.
#define	BAD   3
	Mark not supported transition.
Functions
static int	trans_ok_p (HTK_HMM_Trans *t)
boolean	check_hmm_limit (HTK_HMM_Data *dt)
boolean	check_all_hmm_limit (HTK_HMM_INFO *hmminfo)

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Detailed Description

Check if the given HMM definition file can be used.

Author:

Akinobu LEE

Date:

Tue Feb 15 19:00:58 2005

TRANSITION RESTRICTIONS:

• for HTK and Julius:
  • no arc to initial state
  • no arc from final state

• Normal version of Julius:
  • should have at least one output state
  • allow only one arc from initial state
  • allow only one arc to final state (internal skip/loop is allowed)

• Multipath version of Julius:
  • should have at least one output state

In multipath version, all the transitions including model-skipping transition is allowed. However, in normal version, their transition is restricted as above.

If such transition is found, Julius output warning and proceed by modifying transition to suite for the restriction.

Revision

1.2

Definition in file check_hmm_restriction.c.

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Function Documentation

static int trans_ok_p (  HTK_HMM_Trans *  t  )  [static]

Scan the transition matrix to test the ristrictions. Parameters: t  [in] a transition matrix to be tested Returns: 0 if it conforms, 1 if unacceptable transition was found and modification forced, 3 if totally unsupported transition as included and cannot by handled. Definition at line 75 of file check_hmm_restriction.c. Referenced by check_hmm_limit().

boolean check_hmm_limit (  HTK_HMM_Data *  dt  )

Check if the transition matrix conforms the ristrictions of Julius. Parameters: dt  [in] HTK HMM model to check. Returns: TRUE on success, FALSE if the check failed. Definition at line 209 of file check_hmm_restriction.c. Referenced by check_all_hmm_limit().

boolean check_all_hmm_limit (  HTK_HMM_INFO *  hmminfo  )

Check all the HMM definitions in a HTK HMM definition data. Parameters: hmminfo  [in] HTK HMM data to check. Returns: TRUE if there was no bad models, FALSE if at least one model is bad. Definition at line 242 of file check_hmm_restriction.c. Referenced by rdhmmdef().

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