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java.lang.Object jAudioFeatureExtractor.AudioFeatures.FeatureExtractor jAudioFeatureExtractor.AudioFeatures.StrongestFrequencyVariability
public class StrongestFrequencyVariability
A feature extractor that extracts the Strongest Frequency Variability from window to window. This is a good measure of the amount of change in fundamental frequency that a signal goes through over a moderate amount of time.
This is calculated by taking the standard deviation of the frequency of the power spectrum bin with the highest power over the last 100 windows.
No extracted feature values are stored in objects of this class.
Field Summary |
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Fields inherited from class jAudioFeatureExtractor.AudioFeatures.FeatureExtractor |
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definition, dependencies, offsets, parent |
Constructor Summary | |
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StrongestFrequencyVariability()
Basic constructor that sets the definition and dependencies (and their offsets) of this feature. |
Method Summary | |
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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 jAudioFeatureExtractor.AudioFeatures.FeatureExtractor |
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getDepenedencies, getDepenedencyOffsets, getElement, getFeatureDefinition, setElement, setParent, setWindow |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public StrongestFrequencyVariability()
Method Detail |
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public double[] extractFeature(double[] samples, double sampling_rate, double[][] other_feature_values) throws java.lang.Exception
In the case of this feature the sampling_rate is ignored.
extractFeature
in class FeatureExtractor
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.
java.lang.Exception
- Throws an informative exception if
the feature cannot be calculated.public java.lang.Object clone()
FeatureExtractor
clone
in class FeatureExtractor
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