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## jAudioFeatureExtractor.AudioFeatures
クラス BeatHistogramLabels

    java.lang.Object
      jAudioFeatureExtractor.AudioFeatures.FeatureExtractor
          jAudioFeatureExtractor.AudioFeatures.BeatHistogramLabels

    public class BeatHistogramLabels

extends FeatureExtractor

A "feature extractor" that calculates the bin labels, in beats per minute, of a beat histogram.

Although this is not a useful feature for the purposes of classifying, it can be useful for calculating other features.

IMPORTANT:

The window size of 256 RMS windows used in the BeatHistogram is hard-coded into this class. Any changes to the value in that class must be made here as well.

Daniel McEnnis 05-08-05 added setBinNumber, getElement, setElement, and clone

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
`BeatHistogramLabels()` 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.
`java.lang.String` | `getElement(int index)` Function permitting an unintelligent outside function (ie.
`void` | `setBinNumber(int n)` Sets the bin Number - changes should be linked to beatHistogramType
`void` | `setElement(int index, java.lang.String value)` Function permitting an unintelligent outside function (ie.

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

### BeatHistogramLabels

    public BeatHistogramLabels()

  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 and other_feature_values parameters are 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.

### setBinNumber

    public void setBinNumber(int n)
                      throws java.lang.Exception

  Sets the bin Number - changes should be linked to beatHistogramType

  パラメータ:
    `n` - new number of beat bins
  例外:
    `java.lang.Exception` - thrown if new number of bins is les than 2

### getElement

    public java.lang.String getElement(int index)
                                throws java.lang.Exception

  Function permitting an unintelligent outside function (ie. EditFeatures frame) to get the default values used to populate the table's entries. The correct index values are inferred from definition.attribute value.

  オーバーライド:
    クラス `FeatureExtractor` 内の `getElement`
  パラメータ:
    `index` - which of AreaMoment's attributes should be edited.
  例外:
    `java.lang.Exception`

### setElement

    public void setElement(int index,
                           java.lang.String value)
                    throws java.lang.Exception

  Function permitting an unintelligent outside function (ie. EditFeatures frame) to set the default values used to popylate the table's entries. Like getElement, the correct index values are inferred from the definition.attributes value.

  オーバーライド:
    クラス `FeatureExtractor` 内の `setElement`
  パラメータ:
    `index` - attribute to be set
    `value` - new value of the attribute
  例外:
    `java.lang.Exception`

### 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.

  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