edu.cmu.sphinx.linguist.language.ngram

Class NetworkLanguageModel

java.lang.Object

edu.cmu.sphinx.linguist.language.ngram.NetworkLanguageModel

All Implemented Interfaces:

LanguageModel, Configurable

public class NetworkLanguageModel
extends java.lang.Object
implements LanguageModel

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	PROP_HOST The property specifying the host of the language model server.
static java.lang.String	PROP_PORT The property specifying the port of the language model server.

Fields inherited from interface edu.cmu.sphinx.linguist.language.ngram.LanguageModel

PROP_DICTIONARY, PROP_LOCATION, PROP_MAX_DEPTH, PROP_UNIGRAM_WEIGHT

Constructor Summary

Constructors

Constructor and Description
NetworkLanguageModel()
NetworkLanguageModel(java.lang.String host, int port, java.net.URL location, int maxDepth) Creates network language model client

Method Summary

Modifier and Type	Method and Description
void	allocate() Create the language model
void	deallocate() Deallocate resources allocated to this language model
int	getMaxDepth() Returns the maximum depth of the language model
float	getProbability(WordSequence wordSequence) Gets the n-gram probability of the word sequence represented by the word list
float	getSmear(WordSequence wordSequence) Gets the smear term for the given wordSequence.
java.util.Set<java.lang.String>	getVocabulary() Returns the set of words in the language model.
void	newProperties(PropertySheet ps) This method is called when this configurable component needs to be reconfigured.
void	onUtteranceEnd() Called on utterance end to clear cache if needed

Methods inherited from class java.lang.Object

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

Field Detail

PROP_HOST

@S4String(defaultValue="localhost")
public static final java.lang.String PROP_HOST

The property specifying the host of the language model server.

See Also:

Constant Field Values

PROP_PORT

@S4Integer(defaultValue=2525)
public static final java.lang.String PROP_PORT

The property specifying the port of the language model server.

See Also:

Constant Field Values

Constructor Detail

NetworkLanguageModel

public NetworkLanguageModel(java.lang.String host,
                            int port,
                            java.net.URL location,
                            int maxDepth)

Creates network language model client

Parameters:

host - server host

port - server port

location - URL of the file with vocabulary (only needed for 1-stage model)

maxDepth - depth of the model

NetworkLanguageModel

public NetworkLanguageModel()

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

Parameters:

ps - a property sheet holding the new data

Throws:

PropertyException - if there is a problem with the properties.

allocate

public void allocate()
              throws java.io.IOException

Description copied from interface: LanguageModel

Create the language model

Specified by:

allocate in interface LanguageModel

Throws:

java.io.IOException - if error occurrs

deallocate

public void deallocate()

Description copied from interface: LanguageModel

Deallocate resources allocated to this language model

Specified by:

deallocate in interface LanguageModel

getMaxDepth

public int getMaxDepth()

Description copied from interface: LanguageModel

Returns the maximum depth of the language model

Specified by:

getMaxDepth in interface LanguageModel

Returns:

the maximum depth of the language model

getProbability

public float getProbability(WordSequence wordSequence)

Description copied from interface: LanguageModel

Gets the n-gram probability of the word sequence represented by the word list

Specified by:

getProbability in interface LanguageModel

Parameters:

wordSequence - the wordSequence

Returns:

the probability of the word sequence in log base

getSmear

public float getSmear(WordSequence wordSequence)

Description copied from interface: LanguageModel

Gets the smear term for the given wordSequence. Used in LexTreeLinguist. See LexTreeLinguist.PROP_WANT_UNIGRAM_SMEAR for details.

Specified by:

getSmear in interface LanguageModel

Parameters:

wordSequence - the word sequence

Returns:

the smear term associated with this word sequence

getVocabulary

public java.util.Set<java.lang.String> getVocabulary()

Description copied from interface: LanguageModel

Returns the set of words in the language model. The set is unmodifiable.

Specified by:

getVocabulary in interface LanguageModel

Returns:

the unmodifiable set of words

onUtteranceEnd

public void onUtteranceEnd()

Description copied from interface: LanguageModel

Called on utterance end to clear cache if needed

Specified by:

onUtteranceEnd in interface LanguageModel