jAudioFeatureExtractor.AudioFeatures
クラス MFCC

java.lang.Object
  上位を拡張 jAudioFeatureExtractor.AudioFeatures.FeatureExtractor
      上位を拡張 jAudioFeatureExtractor.AudioFeatures.MFCC

public class MFCC
extends FeatureExtractor

Utilizes the MFCC code from the OrangeCow Volume project.

S. Pfeiffer, and C. Parker, and T. Vincent. 2005. OC volume: Java speech recognition engine. 2005. [cited April 14, 2005].

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
MFCC()
          Construct a MFCC object, setting definition, dependencies, and offsets.
 
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)
          Calculate Mel Frequency Cepstrum Coeffecients from the magnitude spectrum of a signal
 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.
 
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

MFCC

public MFCC()
Construct a MFCC object, setting definition, dependencies, and offsets.

メソッドの詳細

extractFeature

public double[] extractFeature(double[] samples,
                               double sampling_rate,
                               double[][] other_feature_values)
                        throws java.lang.Exception
Calculate Mel Frequency Cepstrum Coeffecients from the magnitude spectrum of a signal

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()
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

getElement

public java.lang.String getElement(int index)
                            throws java.lang.Exception
クラス FeatureExtractor の記述:
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
クラス FeatureExtractor の記述:
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