edu.cmu.sphinx.result
Class MAPConfidenceScorer

java.lang.Object
  extended by 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()
           
 
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()
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