LatticeParser - Speech lattice parsing module
[Syntactic tools level]

Speech lattice syntactic parsing algorithm (former parselattice module). More...

Data Structures
struct	ParsingLatticeLink
	Link (arc) between two nodes of a parsing lattice. More...
struct	ParsingLattice
	Speech lattice. More...
Defines
#define	SILENCE   "<SIL>"
	String that specifies a silence in a speech lattice file.
#define	GET_LINK(ParsingLattice, unsigned int)
	Get a given parsing lattice link (arc) indexed by the second argument.
Functions
void	parsingLatticeDeleteSilences (ParsingLattice *lattice)
void	parsingLatticeDeleteUnreachedNodes (ParsingLattice *lattice)
ParsingLattice *	parsingLatticeLoad (const char *filename, const double acoustic_factor)
ParsingChart *	parsingLatticeToChart (const Grammar *grammar, const ParsingLattice *lattice, const gboolean use_acoustic)
void	parsingLatticeSave (const ParsingLattice *lattice, const char *filename)
ParsingChart *	parsingLatticeParse (const ParsingLattice *lattice, const Grammar *grammar, const gboolean use_acoustic, const ParsingMode parsing_mode)
ParsingLattice *	parsingLatticeCreate ()
void	parsingLatticeFree (ParsingLattice **lattice)

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Detailed Description

Speech lattice syntactic parsing algorithm (former parselattice module).

SlpTK Library 0.6.0

Required header

<latticeparser.h>

Author:

Ramon Aragues (creation on 08.06.1998)

Jean-Cédric Chappelier (adaptation on 10.06.1998)

Jean-Cédric Chappelier (adaptation on 03.10.2000)

Antonin Merçay (revision on 03.02.2005)

Date:

2 March 2005

Version:

0.6.0

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Define Documentation

#define GET_LINK	(	ParsingLattice,
		unsigned int		)

Get a given parsing lattice link (arc) indexed by the second argument.

See also:

ParsingLatticeLink ParsingLattice

#define SILENCE   "<SIL>"

String that specifies a silence in a speech lattice file.

See also:

parsingLatticeLoad()

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Function Documentation

ParsingLattice * parsingLatticeCreate

(

)

Allocate and initialize a new parsing lattice (constructor)

Returns:

The new parsing lattice instance

See also:

parsingLatticeFree()

Former(s) function(s):

Init_Lattice

void parsingLatticeDeleteSilences

(

ParsingLattice *

lattice

)

Delete the silences in the parsing lattice by extending the links to the left . Follow the list of silences, create the new links generated by the extension and then delete the <SIL> link.

Parameters:

[in]

lattice

The considered parsing lattice

See also:

parsingLatticeDeleteUnreachedNodes()

Former(s) function(s):

DeleteSilences

void parsingLatticeDeleteUnreachedNodes

(

ParsingLattice *

lattice

)

Delete nodes which are not the start or end of a at least one link

Parameters:

[in]

lattice

The parsing lattice to consider

See also:

parsingLatticeDeleteSilences()

Former(s) function(s):

DeleteUnreachedNodes

void parsingLatticeFree

(

ParsingLattice **

lattice

)

Free the memory allocated to a parsing lattice (destructor)

Parameters:

[in]

lattice

The parsing lattice to free

See also:

parsingLatticeCreate()

Former(s) function(s):

Libere_Lattice

ParsingLattice ** parsingLatticeLoad	(	const char *	filename,
		const double	acoustic_factor
	)

Load a parsing lattice from the content of a (human-readable) textual file.

Parameters:

[in]	filename	The input lattice filename
[in]	acoustic_factor	The rescaling constant to apply to the acoustic probabilities read (useful for passing from log to log10

Returns:

The loaded parsing lattice (NULL if operation fails)

See also:

parsingLatticeSave()

Former(s) function(s):

ReadLatticeFile

ParsingChart * parsingLatticeParse	(	const ParsingLattice *	lattice,
		const Grammar *	grammar,
		const gboolean	use_acoustic,
		const ParsingMode	parsing_mode
	)

Perform a syntactical analysis (parsing) on a parsing lattice

Parameters:

[in]	lattice	The input parsing lattice
[in]	grammar	The source grammar
[in]	use_acoustic	The flag telling if the acoustic probability associated to each arc must be taken into account or not
[in]	parsing_mode	The parsing mode to use

Returns:

The output parsing chart

See also:

parsingLatticeToChart()

Former(s) function(s):

Analyse_Syntaxique_Lattice & Analyse_Syntaxique_Lattice_Type

void parsingLatticeSave	(	const ParsingLattice *	lattice,
		const char *	filename
	)

Save a parsing lattice into a (human-readable) textual file.

Parameters:

[in]	lattice	The parsing lattice to save
[in]	filename	The output lattice filename

See also:

parsingLatticeLoad()

ParsingChart * parsingLatticeToChart	(	const Grammar *	grammar,
		const ParsingLattice *	lattice,
		const gboolean	use_acoustic
	)

Create a parsing chart from the content of a parsing lattice

Parameters:

[in]	grammar	The source grammar
[in]	lattice	The considered parsing lattice
[in]	use_acoustic	The flag telling if the acoustic probability associated to each arc must be taken into account or not

Returns:

The corresponding parsing chart

See also:

parsingLatticeParse()

Former(s) function(s):

Lattice_to_Chart

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