net.beadsproject.beads.analysis.featureextractors

Class SpectralCentroid

java.lang.Object

net.beadsproject.beads.core.Bead

net.beadsproject.beads.analysis.FeatureExtractor<java.lang.Float,float[]>

net.beadsproject.beads.analysis.featureextractors.SpectralCentroid

public class SpectralCentroid
extends FeatureExtractor<java.lang.Float,float[]>

SpectralCentroid calculates the spectral centroid of a signal. It should be set up to listen to a PowerSpectrum object.

Field Summary

Fields inherited from class net.beadsproject.beads.analysis.FeatureExtractor

featureDescriptions, features, name, numFeatures

Constructor Summary

Constructors

Constructor and Description
SpectralCentroid(float sampleRate) Instantiates a new SpectralCentroid.

Method Summary

Modifier and Type	Method and Description
int	getNumberOfFeatures() Gets the number of features.
void	process(TimeStamp startTime, TimeStamp endTime, float[] powerSpectrum) Process some data of type P (specified by the class def).
void	setNumberOfFeatures(int numFeatures) Sets the number of features.

Methods inherited from class net.beadsproject.beads.analysis.FeatureExtractor

addListener, forward, getFeatureDescriptions, getFeatures, getName, removeListener, setName

Methods inherited from class net.beadsproject.beads.core.Bead

getKillListener, isDeleted, isPaused, kill, message, messageReceived, pause, setKillListener, start, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SpectralCentroid

public SpectralCentroid(float sampleRate)

Instantiates a new SpectralCentroid.

Parameters:

sampleRate - the sample rate in samples per second.

Method Detail

process

public void process(TimeStamp startTime,
                    TimeStamp endTime,
                    float[] powerSpectrum)

Description copied from class: FeatureExtractor

Process some data of type P (specified by the class def). This method must be overidden by implementing classes.

Specified by:

process in class FeatureExtractor<java.lang.Float,float[]>

powerSpectrum - the data.

getNumberOfFeatures

public int getNumberOfFeatures()

Description copied from class: FeatureExtractor

Gets the number of features.

Overrides:

getNumberOfFeatures in class FeatureExtractor<java.lang.Float,float[]>

Returns:

the number of features.

setNumberOfFeatures

public void setNumberOfFeatures(int numFeatures)

Description copied from class: FeatureExtractor

Sets the number of features.

Overrides:

setNumberOfFeatures in class FeatureExtractor<java.lang.Float,float[]>

Parameters:

numFeatures - the new number of features.