jAudioFeatureExtractor.AudioFeatures
クラス RelativeDifferenceFunction
java.lang.Object
jAudioFeatureExtractor.AudioFeatures.FeatureExtractor
jAudioFeatureExtractor.AudioFeatures.RelativeDifferenceFunction
public class RelativeDifferenceFunction
- extends FeatureExtractor
This feature calculates the log of the derivative of the RMS. This is useful
for onset detection.
- 作成者:
- Daniel McEnnis
コンストラクタの概要 |
RelativeDifferenceFunction()
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)
Calculates the log ofthe derivative of the RMS from the last 2 versions
of RMS |
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 |
RelativeDifferenceFunction
public RelativeDifferenceFunction()
- Basic constructor that sets the definition and dependencies (and their
offsets) of this feature.
extractFeature
public double[] extractFeature(double[] samples,
double sampling_rate,
double[][] other_feature_values)
throws java.lang.Exception
- Calculates the log ofthe derivative of the RMS from the last 2 versions
of RMS
- 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