edu.cmu.sphinx.frontend.filter

Class EnergyFilter

java.lang.Object

edu.cmu.sphinx.util.props.ConfigurableAdapter

edu.cmu.sphinx.frontend.BaseDataProcessor

edu.cmu.sphinx.frontend.filter.EnergyFilter

All Implemented Interfaces:

DataProcessor, Configurable

public class EnergyFilter
extends BaseDataProcessor

EnergyFilter silently drops zero energy frames from the stream. This is a deterministic alternative to Dither.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	PROP_MAX_ENERGY If energy is below this threshold frame is dropped

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

logger

Constructor Summary

Constructors

Constructor and Description
EnergyFilter()
EnergyFilter(double maxEnergy)

Method Summary

Modifier and Type	Method and Description
Data	getData() Returns the next DoubleData object, skipping frames with zero energy
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, initialize, 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_MAX_ENERGY

@S4Double(defaultValue=2.0)
public static final java.lang.String PROP_MAX_ENERGY

If energy is below this threshold frame is dropped

See Also:

Constant Field Values

Constructor Detail

EnergyFilter

public EnergyFilter(double maxEnergy)

EnergyFilter

public EnergyFilter()

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.

getData

public Data getData()
             throws DataProcessingException

Returns the next DoubleData object, skipping frames with zero energy

Specified by:

getData in interface DataProcessor

Specified by:

getData in class BaseDataProcessor

Returns:

the next available DoubleData object, or null if no Data is available

Throws:

DataProcessingException - if a data processing error occurred