edu.cmu.sphinx.frontend.transform

Class Lifter

java.lang.Object

edu.cmu.sphinx.util.props.ConfigurableAdapter

edu.cmu.sphinx.frontend.BaseDataProcessor

edu.cmu.sphinx.frontend.transform.Lifter

All Implemented Interfaces:

DataProcessor, Configurable

public class Lifter
extends BaseDataProcessor

Applies the Lifter to the input mel-cepstrum to smooth cepstrum values

Field Summary

Fields

Modifier and Type	Field and Description
protected int	cepstrumSize
protected int	lifterValue
protected double[]	lifterWeights
static java.lang.String	PROP_LIFTER_VALUE The property for the value of the lifterValue

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

logger

Constructor Summary

Constructors

Constructor and Description
Lifter()
Lifter(int lifterValue)

Method Summary

Modifier and Type	Method and Description
Data	getData() Returns the next DoubleData object, which is the lifted mel-cepstrum of the input mel-cepstrum.
void	initialize() Initializes this DataProcessor.
void	newProperties(PropertySheet ps) This method is called when this configurable component needs to be reconfigured.

Methods inherited from class edu.cmu.sphinx.frontend.BaseDataProcessor

getPredecessor, setPredecessor

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

getName, initLogger, toString

Methods inherited from class java.lang.Object

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

Field Detail

PROP_LIFTER_VALUE

@S4Integer(defaultValue=22)
public static final java.lang.String PROP_LIFTER_VALUE

The property for the value of the lifterValue

See Also:

Constant Field Values

lifterValue

protected int lifterValue

cepstrumSize

protected int cepstrumSize

lifterWeights

protected double[] lifterWeights

Constructor Detail

Lifter

public Lifter(int lifterValue)

Lifter

public Lifter()

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.

initialize

public void initialize()

Description copied from class: BaseDataProcessor

Initializes this DataProcessor. This is typically called after the DataProcessor has been configured.

Specified by:

initialize in interface DataProcessor

Overrides:

initialize in class BaseDataProcessor

getData

public Data getData()
             throws DataProcessingException

Returns the next DoubleData object, which is the lifted mel-cepstrum of the input mel-cepstrum. Signals are returned unmodified.

Specified by:

getData in interface DataProcessor

Specified by:

getData in class BaseDataProcessor

Returns:

the next available DoubleData lifted mel-cepstrum, or Signal object, or null if no Data is available

Throws:

DataProcessingException - if a data processing error occurred