jAudioFeatureExtractor.AudioFeatures
クラス FractionOfLowEnergyWindows
java.lang.Object
jAudioFeatureExtractor.AudioFeatures.FeatureExtractor
jAudioFeatureExtractor.AudioFeatures.FractionOfLowEnergyWindows
public class FractionOfLowEnergyWindows
- extends FeatureExtractor
A feature extractor that extracts the Fraction Of Low Energy Windows from
window to window. This is a good measure of how much of a signal is quiet
relative to the rest of a signal.
No extracted feature values are stored in objects of this class.
Daniel McEnnis 05-07-05 added number_of_windows as editable property. Added
getElement, setElement, and clone
Daniel McEnnis 05-08-05 added setWindow to permit this feature to be edited
by GlobalWindow frame.
- 作成者:
- Cory McKay
コンストラクタの概要 |
FractionOfLowEnergyWindows()
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 |
setElement(int index,
java.lang.String value)
Function permitting an unintelligent outside function (ie. |
void |
setWindow(int n)
Function that must be overridden to allow this feature to be set globally
by GlobalChange frame. |
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 |
FractionOfLowEnergyWindows
public FractionOfLowEnergyWindows()
- 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
- 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.
setWindow
public void setWindow(int n)
throws java.lang.Exception
- Function that must be overridden to allow this feature to be set globally
by GlobalChange frame.
- オーバーライド:
- クラス
FeatureExtractor
内の setWindow
- パラメータ:
n
- the number of windows of offset to be used in calculating this
feature
- 例外:
java.lang.Exception
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 setvalue
- 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