NBest Class Reference

This class will translate recognition administration (a bunch of WLRType objects) into an N-Best list. More...

List of all members.

Public Member Functions
	NBest (WLRType *path, char **voc, int stS, LanguageModel *lm, double orgLm, double orgTrP)
	~NBest ()
void	print (int max)
void	setReference (WLRType *w)
int	getScore (float lmScale, float transPenalty)
Protected Member Functions
int	getNBestArraySize (WLRType *w, int *nrOfPaths)
int	fillNBestArray (WLRType *w, NBestType *array, int *nr, int *emptyNr, int length)
bool	printNextBest ()
bool	bigger (float lmScale, float transPenalty, float target)
Protected Attributes
NBestList	reference
char **	vocabulary
LanguageModel *	languageModel
int	startOfSentenceWord
double	org_LmScale
double	org_transPenalty
int	adminLength
NBestList *	admin

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Detailed Description

This class will translate recognition administration (a bunch of WLRType objects) into an N-Best list.

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Constructor & Destructor Documentation

NBest::NBest	(	WLRType *	path,
		char **	voc,
		int	stS,
		LanguageModel *	lm,
		double	orgLm,
		double	orgTrP
	)

The constructor will create the N-Best list structure. The original WLR strings are flatten. For each sentence occurence, the one with the best AM score is retained, duplicates are removed.

Todo:

Do we need to check which duplicate is the best?

References admin, adminLength, NBestType::AM, fillNBestArray(), getNBestArraySize(), LanguageModel::getP(), languageModel, NBestType::LM, NBestList::noSilWords, NBestList::nrWords, org_LmScale, org_transPenalty, startOfSentenceWord, NBestList::totAM, NBestList::totLM, vocabulary, NBestType::wordID, and NBestList::wordList.

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NBest::~NBest

(

)

Destructor will delete the administration

References admin, adminLength, and NBestList::wordList.

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Member Function Documentation

bool NBest::bigger	(	float	lmScale,
		float	transPenalty,
		float	target
	)			[protected]

This method will return true if there is a hypothesis bigger than target that is not yet 'processed'

References admin, adminLength, NBestList::noSilWords, NBestList::processed, NBestList::totAM, and NBestList::totLM.

Referenced by getScore().

int NBest::fillNBestArray	(	WLRType *	w,
		NBestType *	array,
		int *	nr,
		int *	emptyNr,
		int	length
	)			[protected]

Fills the array of the N-Best list.

References NBestType::AM, WLRType::COMBlikelihood, LanguageModel::getLastWordID(), LanguageModel::getP(), WLRType::isSil, languageModel, LM, NBestType::LM, WLRType::lmHistory, WLRType::nBest, org_LmScale, org_transPenalty, WLRType::previous, startOfSentenceWord, WLRType::timeStamp, WLRType::usedAt, and NBestType::wordID.

Referenced by NBest().

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int NBest::getNBestArraySize	(	WLRType *	w,
		int *	nrOfPaths
	)			[protected]

This method will determine how many words the longest path in the N-Best list contains and how big N is (nrOfPaths, unfiltered)

References WLRType::nBest, WLRType::previous, WLRType::timeStamp, and WLRType::usedAt.

Referenced by NBest().

int NBest::getScore	(	float	lmScale,
		float	transPenalty
	)

Calculates the score of the reference with LM-scale lmScale..

References admin, adminLength, bigger(), NBestList::noSilWords, NBestList::processed, reference, NBestList::totAM, and NBestList::totLM.

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void NBest::print

(

int

max

)

Print the N-Best hypothesis (N == max)

References admin, adminLength, printNextBest(), and NBestList::processed.

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bool NBest::printNextBest

(

)

[protected]

Print the best hypothesis which is not just as good as 'upperLimit'...

References admin, adminLength, NBestList::noSilWords, NBestList::nrWords, org_LmScale, org_transPenalty, NBestList::processed, NBestList::totAM, NBestList::totLM, and vocabulary.

Referenced by print().

void NBest::setReference

(

WLRType *

w

)

Sets a reference hypothese.

References WLRType::COMBlikelihood, LanguageModel::getLastWordID(), LanguageModel::getP(), WLRType::isSil, languageModel, WLRType::lmHistory, NBestList::noSilWords, NBestList::nrWords, org_LmScale, org_transPenalty, WLRType::previous, reference, WLRType::timeStamp, NBestList::totAM, and NBestList::totLM.

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Member Data Documentation

NBestList* NBest::admin [protected]

Referenced by bigger(), getScore(), NBest(), print(), printNextBest(), and ~NBest().

int NBest::adminLength [protected]

Referenced by bigger(), getScore(), NBest(), print(), printNextBest(), and ~NBest().

LanguageModel* NBest::languageModel [protected]

Referenced by fillNBestArray(), NBest(), and setReference().

double NBest::org_LmScale [protected]

Referenced by fillNBestArray(), NBest(), printNextBest(), and setReference().

double NBest::org_transPenalty [protected]

Referenced by fillNBestArray(), NBest(), printNextBest(), and setReference().

NBestList NBest::reference [protected]

Referenced by getScore(), and setReference().

int NBest::startOfSentenceWord [protected]

Referenced by fillNBestArray(), and NBest().

char** NBest::vocabulary [protected]

Referenced by NBest(), and printNextBest().