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## jAudioFeatureExtractor.AudioFeatures
クラス LPC

    java.lang.Object
      jAudioFeatureExtractor.AudioFeatures.FeatureExtractor
          jAudioFeatureExtractor.AudioFeatures.LPC

    public class LPC

extends FeatureExtractor

Calculates linear predictive coeffecients of an signal. Also includes a warping factor lambda that is disabled by default. Based upon code published at www.musicdsp.org.

2005. Music-dsp source code archive [online]. [cited 17 May 2005]. Available from the World Wide Web: (http://musicdsp.org/archive.php?classid=2#137)

作成者:
  Daniel McEnnis

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
`LPC()` Basic constructor for LPC that sets definition, dependencies, and offsets field.

メソッドの概要
`java.lang.Object` | `clone()` Provide a complete copy of this feature.
`double[]` | `extractFeature(double[] samples, double sampling_rate, double[][] other_feature_values)` Code taken from www.musicdsp.org.
`java.lang.String` | `getElement(int index)` Function permitting an unintelligent outside function (ie.
`void` | `setElement(int index, java.lang.String value)` Function permitting an unintelligent outside function (ie.
`void` | `setLambda(double l)` Provides a mechanism for editing the 'frequency warping' factor in the LPC code from musicdsp.
`void` | `setNumDimensions(int n)` Edits the number of LPC coeffecients to be calculated.

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

### LPC

    public LPC()

  Basic constructor for LPC that sets definition, dependencies, and offsets field.

メソッドの詳細

### extractFeature

    public double[] extractFeature(double[] samples,
                                   double sampling_rate,
                                   double[][] other_feature_values)
                            throws java.lang.Exception

  Code taken from www.musicdsp.org.

  mail.mutagene.net.2005. Music dsp source archive [online] [cited May 10, 2005] Available on world wide web (http://musicdsp.org/archive.php?classid=2#137)

  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.
  関連項目:
    `FeatureExtractor.extractFeature(double[], double, double[][])`

### clone

    public java.lang.Object clone()

  Provide a complete copy of this feature. Used to implement the prottype pattern

  定義:
    クラス `FeatureExtractor` 内の `clone`

### 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`

### setNumDimensions

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

  Edits the number of LPC coeffecients to be calculated. This is a unique feature in that the number of dimensions of the feature are changed by this function, requiring a reference back to the parent to redraw the table displaying this information.

  パラメータ:
    `n` - number of coeffecients to be calculated.
  例外:
    `java.lang.Exception` - thrown if less than 1 feature is to be calculated.

### setLambda

    public void setLambda(double l)
                   throws java.lang.Exception

  Provides a mechanism for editing the 'frequency warping' factor in the LPC code from musicdsp.

  パラメータ:
    `l` - new lmbda value
  例外:
    `java.lang.Exception` - throws if the lambda value is not a real number.

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