edu.cmu.sphinx.result
Class MAPConfidenceScorer

java.lang.Object
  edu.cmu.sphinx.result.MAPConfidenceScorer

All Implemented Interfaces:

ConfidenceScorer, Configurable

public class MAPConfidenceScorer
extends java.lang.Object
implements ConfidenceScorer, Configurable

Computes confidences for the highest scoring path in a Result. The highest scoring path refers to the path with the maximum a posteriori (MAP) probability, which is why this class is so named. Note that this MAPConfidenceScorer creates a Lattice from the result first, which means that you should only use this confidence scorer if the result is created from the LexTreeLinguist and the WordPruningBreadthFirstSearchManager.

Field Summary

static java.lang.String	PROP_DUMP_LATTICE Sphinx property that specifies whether to dump the lattice.
static java.lang.String	PROP_DUMP_SAUSAGE Sphinx property that specifies whether to dump the sausage.
static java.lang.String	PROP_LANGUAGE_WEIGHT Sphinx property that defines the language model weight.

Constructor Summary

MAPConfidenceScorer()

MAPConfidenceScorer(float languageWeight, boolean dumpLattice, boolean dumpSausage)

Method Summary

void	newProperties(PropertySheet ps) This method is called when this configurable component needs to be reconfigured.
ConfidenceResult	score(Result result) Computes confidences for a Result and returns a ConfidenceResult, a compact representation of all the hypothesis contained in the result together with their per-word and per-path confidences.

Methods inherited from class java.lang.Object

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

Field Detail

PROP_LANGUAGE_WEIGHT

@S4Double(defaultValue=1.0)
public static final java.lang.String PROP_LANGUAGE_WEIGHT

Sphinx property that defines the language model weight.

See Also:

Constant Field Values

PROP_DUMP_LATTICE

@S4Boolean(defaultValue=false)
public static final java.lang.String PROP_DUMP_LATTICE

Sphinx property that specifies whether to dump the lattice.

See Also:

Constant Field Values

PROP_DUMP_SAUSAGE

@S4Boolean(defaultValue=false)
public static final java.lang.String PROP_DUMP_SAUSAGE

Sphinx property that specifies whether to dump the sausage.

See Also:

Constant Field Values

Constructor Detail

MAPConfidenceScorer

public MAPConfidenceScorer(float languageWeight,
                           boolean dumpLattice,
                           boolean dumpSausage)

MAPConfidenceScorer

public MAPConfidenceScorer()

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.

score

public ConfidenceResult score(Result result)

Computes confidences for a Result and returns a ConfidenceResult, a compact representation of all the hypothesis contained in the result together with their per-word and per-path confidences.

Specified by:

score in interface ConfidenceScorer

Parameters:

result - the result to compute confidences for

Returns:

a confidence result