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## jAudioFeatureExtractor.AudioFeatures
クラス StrongestFrequencyVariability

    java.lang.Object
      jAudioFeatureExtractor.AudioFeatures.FeatureExtractor
          jAudioFeatureExtractor.AudioFeatures.StrongestFrequencyVariability

    public class StrongestFrequencyVariability

extends FeatureExtractor

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.

作成者:
  Cory McKay

フィールドの概要

クラス jAudioFeatureExtractor.AudioFeatures.FeatureExtractor から継承されたフィールド
`definition, dependencies, offsets, parent`

コンストラクタの概要
`StrongestFrequencyVariability()` Basic constructor that sets the definition and dependencies (and their offsets) of this feature.

メソッドの概要
`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.

クラス jAudioFeatureExtractor.AudioFeatures.FeatureExtractor から継承されたメソッド
`getDepenedencies, getDepenedencyOffsets, getElement, getFeatureDefinition, setElement, setParent, setWindow`

クラス java.lang.Object から継承されたメソッド
`equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

コンストラクタの詳細

### StrongestFrequencyVariability

    public StrongestFrequencyVariability()

  Basic constructor that sets the definition and dependencies (and their offsets) of this feature.

メソッドの詳細

### 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 is ignored.

  定義:
    クラス `FeatureExtractor` 内の `extractFeature`
  パラメータ:
    `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.
  戻り値:
    The extracted feature value(s).
  例外:
    `java.lang.Exception` - Throws an informative exception if the feature cannot be calculated.

### clone

    public java.lang.Object clone()

  クラス `FeatureExtractor` の記述:
  Create an identical copy of this feature. This permits FeatureExtractor to use the prototype pattern to create new composite features using metafeatures.

  定義:
    クラス `FeatureExtractor` 内の `clone`

概要 | パッケージ | クラス | 階層ツリー | 非推奨 API | 索引 | ヘルプ
前のクラス 次のクラス | フレームあり フレームなし
概要: 入れ子 | フィールド | コンストラクタ | メソッド | 詳細: フィールド | コンストラクタ | メソッド