jAudioFeatureExtractor.AudioFeatures
Class SpectralVariability
java.lang.Object
jAudioFeatureExtractor.AudioFeatures.FeatureExtractor
jAudioFeatureExtractor.AudioFeatures.SpectralVariability
public class SpectralVariability
- extends FeatureExtractor
A feature extractor that extracts the SpectralVariance. This is a measure
of the standard deviation of a signal's magnitude spectrum.
No extracted feature values are stored in objects of this class.
- Author:
- Cory McKay
Constructor Summary |
SpectralVariability()
Basic constructor that sets the definition and dependencies (and their
offsets) of this feature. |
Method Summary |
java.lang.Object |
clone()
Create an identical copy of this feature. |
double[] |
extractFeature(double[] samples,
double sampling_rate,
double[][] other_feature_values)
Extracts this feature from the given samples at the given sampling
rate and given the other feature values. |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SpectralVariability
public SpectralVariability()
- Basic constructor that sets the definition and dependencies (and their
offsets) of this feature.
extractFeature
public double[] extractFeature(double[] samples,
double sampling_rate,
double[][] other_feature_values)
throws java.lang.Exception
- Extracts this feature from the given samples at the given sampling
rate and given the other feature values.
In the case of this feature, the sampling_rate parameter is ignored.
- Specified by:
extractFeature
in class FeatureExtractor
- Parameters:
samples
- The samples to extract the feature from.sampling_rate
- The sampling rate that the samples are
encoded with.other_feature_values
- The values of other features that are
needed to calculate this value. The
order and offsets of these features
must be the same as those returned by
this class's getDependencies and
getDependencyOffsets methods respectively.
The first indice indicates the feature/window
and the second indicates the value.
- Returns:
- The extracted feature value(s).
- Throws:
java.lang.Exception
- Throws an informative exception if
the feature cannot be calculated.
clone
public java.lang.Object clone()
- Create an identical copy of this feature. This permits FeatureExtractor
to use the prototype pattern to create new composite features using
metafeatures.
- Specified by:
clone
in class FeatureExtractor