edu.cmu.sphinx.decoder.scorer
Class AbstractScorer

java.lang.Object
  edu.cmu.sphinx.util.props.ConfigurableAdapter
      edu.cmu.sphinx.decoder.scorer.AbstractScorer

All Implemented Interfaces:

AcousticScorer, Configurable

Direct Known Subclasses:

SimpleAcousticScorer, ThreadedAcousticScorer

public abstract class AbstractScorer
extends ConfigurableAdapter
implements AcousticScorer

Implements some basic scorer functionality but keeps specific scoring open for sub-classes.

Author:

Holger Brandl

Field Summary

static java.lang.String	FEATURE_FRONTEND Property the defines the frontend to retrieve features from for scoring
static java.lang.String	SCORE_NORMALIZER An opotional post-processor for computed scores that will normalize scores.

Constructor Summary

AbstractScorer()

AbstractScorer(BaseDataProcessor frontEnd, ScoreNormalizer scoreNormalizer)

Method Summary

void	allocate() Allocates resources for this scorer
Data	calculateScores(java.util.List<? extends Scoreable> scoreableList) Scores the given set of states.
void	deallocate() Deallocates resources for this scorer
void	newProperties(PropertySheet ps) This method is called when this configurable component needs to be reconfigured.
void	startRecognition() starts the scorer
void	stopRecognition() stops the scorer

Methods inherited from class edu.cmu.sphinx.util.props.ConfigurableAdapter

getName, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

FEATURE_FRONTEND

@S4Component(type=BaseDataProcessor.class)
public static final java.lang.String FEATURE_FRONTEND

Property the defines the frontend to retrieve features from for scoring

See Also:

Constant Field Values

SCORE_NORMALIZER

@S4Component(type=ScoreNormalizer.class,
             mandatory=false)
public static final java.lang.String SCORE_NORMALIZER

An opotional post-processor for computed scores that will normalize scores. If not set, no normalization will applied and the token scores will be returned unchanged.

See Also:

Constant Field Values

Constructor Detail

AbstractScorer

public AbstractScorer()

AbstractScorer

public AbstractScorer(BaseDataProcessor frontEnd,
                      ScoreNormalizer scoreNormalizer)

Parameters:

frontEnd - the frontend to retrieve features from for scoring

scoreNormalizer - optional post-processor for computed scores that will normalize scores. If not set, no normalization will applied and the token scores will be returned unchanged.

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 ConfigurableAdapter

Parameters:

ps - a property sheet holding the new data

Throws:

PropertyException - if there is a problem with the properties.

calculateScores

public Data calculateScores(java.util.List<? extends Scoreable> scoreableList)

Scores the given set of states.

Specified by:

calculateScores in interface AcousticScorer

Parameters:

scoreableList - A list containing scoreable objects to be scored

Returns:

The best scoring scoreable, or null if there are no more features to score

startRecognition

public void startRecognition()

Description copied from interface: AcousticScorer

starts the scorer

Specified by:

startRecognition in interface AcousticScorer

stopRecognition

public void stopRecognition()

Description copied from interface: AcousticScorer

stops the scorer

Specified by:

stopRecognition in interface AcousticScorer

allocate

public void allocate()

Description copied from interface: AcousticScorer

Allocates resources for this scorer

Specified by:

allocate in interface AcousticScorer

deallocate

public void deallocate()

Description copied from interface: AcousticScorer

Deallocates resources for this scorer

Specified by:

deallocate in interface AcousticScorer