edu.cmu.sphinx.linguist.language.grammar

Class LMGrammar

java.lang.Object

edu.cmu.sphinx.linguist.language.grammar.Grammar

edu.cmu.sphinx.linguist.language.grammar.LMGrammar

All Implemented Interfaces:

GrammarInterface, Configurable

public class LMGrammar
extends Grammar

Defines a simple grammar based upon a language model. It generates one grammar nodeper word. This grammar can deal with unigram and bigram grammars of up to 1000 or so words. Note that all probabilities are in the log math domain.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	PROP_LANGUAGE_MODEL The property for the language model to be used by this grammar

Fields inherited from class edu.cmu.sphinx.linguist.language.grammar.Grammar

dictionary, initialNode, logger, PROP_ADD_FILLER_WORDS, PROP_ADD_SIL_WORDS, PROP_DICTIONARY, PROP_OPTIMIZE_GRAMMAR, PROP_SHOW_GRAMMAR

Constructor Summary

Constructors

Constructor and Description
LMGrammar()
LMGrammar(LanguageModel languageModel, boolean showGrammar, boolean optimizeGrammar, boolean addSilenceWords, boolean addFillerWords, Dictionary dictionary)

Method Summary

Modifier and Type	Method and Description
protected GrammarNode	createGrammar() Creates the grammar from the language model.
void	newProperties(PropertySheet ps) This method is called when this configurable component needs to be reconfigured.

Methods inherited from class edu.cmu.sphinx.linguist.language.grammar.Grammar

allocate, createGrammar, createGrammarNode, createGrammarNode, createGrammarNode, createGrammarNode, createGrammarNode, deallocate, dumpGrammar, dumpRandomSentences, dumpRandomSentences, dumpStatistics, getDictionary, getGrammarNodes, getInitialNode, getNumNodes, getRandomSentence, newGrammar, postProcessGrammar

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PROP_LANGUAGE_MODEL

@S4Component(type=LanguageModel.class)
public static final java.lang.String PROP_LANGUAGE_MODEL

The property for the language model to be used by this grammar

See Also:

Constant Field Values

Constructor Detail

LMGrammar

public LMGrammar(LanguageModel languageModel,
                 boolean showGrammar,
                 boolean optimizeGrammar,
                 boolean addSilenceWords,
                 boolean addFillerWords,
                 Dictionary dictionary)

LMGrammar

public LMGrammar()

Method Detail

newProperties

public void newProperties(PropertySheet ps)
                   throws PropertyException

Description copied from interface: Configurable

This method is called when this configurable component needs to be reconfigured.

Specified by:

newProperties in interface Configurable

Overrides:

newProperties in class Grammar

Parameters:

ps - a property sheet holding the new data

Throws:

PropertyException - if there is a problem with the properties.

createGrammar

protected GrammarNode createGrammar()
                             throws java.io.IOException

Creates the grammar from the language model. This Grammar contains one word per grammar node. Each word (and grammar node) is connected to all other words with the given probability

Specified by:

createGrammar in class Grammar

Returns:

the initial grammar node

Throws:

java.io.IOException - if the grammar could not be loaded