julius/word_align.c File Reference

Do Viterbi alignment per word / phoneme/ state. More...

#include <julius.h>

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Defines
#define	PER_WORD   1
#define	PER_PHONEME   2
#define	PER_STATE   3
Functions
static HMM_Logical **	make_phseq (WORD_ID *wseq, short num, int *num_ret, int **end_ret, int per_what)
static void	do_align (WORD_ID *words, short wnum, HTK_Param *param, int per_what)
void	word_align (WORD_ID *words, short wnum, HTK_Param *param)
void	word_rev_align (WORD_ID *revwords, short wnum, HTK_Param *param)
void	phoneme_align (WORD_ID *words, short num, HTK_Param *param)
void	phoneme_rev_align (WORD_ID *revwords, short num, HTK_Param *param)
void	state_align (WORD_ID *words, short num, HTK_Param *param)
void	state_rev_align (WORD_ID *revwords, short num, HTK_Param *param)

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Detailed Description

Do Viterbi alignment per word / phoneme/ state.

Author:

Akinobu Lee

Date:

Sat Sep 24 16:09:46 2005

This file defines functions for performing forced alignment of recognized words. The forced alignment is implimented in Julius/Julian to get the best matching segmentation of recognized word sequence upon input speech. Word-level, phoneme-level and HMM state-level alignment can be obtained.

Julius/Julian performs the forced alignment as a post-processing of recognition process. Recomputation of Viterbi path on the recognized word sequence toward input speech will be done after the recognition to get better alignment.

Revision

1.3

Definition in file word_align.c.

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Function Documentation

static HMM_Logical** make_phseq	(	WORD_ID *	wseq,
		short	num,
		int *	num_ret,
		int **	end_ret,
		int	per_what
	)			[static]

Make the whole sentence HMM from given word sequence by connecting each phoneme HMM.

Parameters:

	wseq	[in] word sequence to align
	num	[in] number of wseq
	num_ret	[out] number of HMM contained in the generated sentence HMM
	end_ret	[out] sequence of state location as alignment unit
	per_what	[in] specify the alignment unit (word / phoneme / state)

Returns:

newly malloced HMM sequences.

Definition at line 77 of file word_align.c.

Referenced by do_align().

static void do_align	(	WORD_ID *	words,
		short	wnum,
		HTK_Param *	param,
		int	per_what
	)			[static]

Build sentence HMM, call viterbi_segment() and output result.

Parameters:

	words	[in] word sequence of the sentence
	wnum	[in] number of words in words
	param	[in] input parameter vector
	per_what	[in] specify the alignment unit (word / phoneme / state)

Definition at line 187 of file word_align.c.

Referenced by phoneme_align(), phoneme_rev_align(), state_align(), state_rev_align(), word_align(), and word_rev_align().

void word_align	(	WORD_ID *	words,
		short	wnum,
		HTK_Param *	param
	)

Do forced alignment per word for the given word sequence.

Parameters:

	words	[in] word sequence
	wnum	[in] length of words
	param	[in] input parameter vectors

Definition at line 381 of file word_align.c.

void word_rev_align	(	WORD_ID *	revwords,
		short	wnum,
		HTK_Param *	param
	)

Do forced alignment per word for the given word sequence (reversed order).

Parameters:

	revwords	[in] word sequence in reversed direction
	wnum	[in] length of revwords
	param	[in] input parameter vectors

Definition at line 403 of file word_align.c.

Referenced by result_reorder_and_output().

void phoneme_align	(	WORD_ID *	words,
		short	num,
		HTK_Param *	param
	)

Do forced alignment per phoneme for the given word sequence.

Parameters:

	words	[in] word sequence
	num	[in] length of words
	param	[in] input parameter vectors

Definition at line 430 of file word_align.c.

void phoneme_rev_align	(	WORD_ID *	revwords,
		short	num,
		HTK_Param *	param
	)

Do forced alignment per phoneme for the given word sequence (reversed order).

Parameters:

	revwords	[in] word sequence in reversed direction
	num	[in] length of revwords
	param	[in] input parameter vectors

Definition at line 452 of file word_align.c.

Referenced by result_reorder_and_output().

void state_align	(	WORD_ID *	words,
		short	num,
		HTK_Param *	param
	)

Do forced alignment per HMM state for the given word sequence.

Parameters:

	words	[in] word sequence
	num	[in] length of words
	param	[in] input parameter vectors

Definition at line 479 of file word_align.c.

void state_rev_align	(	WORD_ID *	revwords,
		short	num,
		HTK_Param *	param
	)

Do forced alignment per state for the given word sequence (reversed order).

Parameters:

	revwords	[in] word sequence in reversed direction
	num	[in] length of revwords
	param	[in] input parameter vectors

Definition at line 501 of file word_align.c.

Referenced by result_reorder_and_output().

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