AudioSpectrumFunctions.LogFrequencyBackgroundRemoval (beaTunes 5.2.24 API)

java.lang.Object
- com.tagtraum.audiokern.audioprocessor.AudioSpectrumFunctions.LogFrequencyBackgroundRemoval

All Implemented Interfaces:

MapFunction<AudioSpectrum>

Enclosing class:

AudioSpectrumFunctions
```
public static class AudioSpectrumFunctions.LogFrequencyBackgroundRemoval
extends Object
implements MapFunction<AudioSpectrum>
```
Implements a noise reduction/whitening scheme for log-frequency spectra with an integer number of bins per semitone similar to the pre-processing defined in "Approximate note transcription for the improved identification of difficult chords" by M. Mauch and S. Dixon.

See Also:

M. Mauch and S. Dixon. Approximate note transcription for the improved identification of difficult chords. In Proceedings of the 11th International Society for Music Information Retrieval Conference (ISMIR 2010), 2010.

Constructor Summary

Constructors
Constructor	Description
`LogFrequencyBackgroundRemoval()`
`LogFrequencyBackgroundRemoval(boolean standardize)`
`LogFrequencyBackgroundRemoval(boolean standardize, int windowLength, float meanFactor)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object o)`
`float`	`getCoefficientOfVariation()`
`float`	`getFractionOfMax()`
`int`	`hashCode()`
`AudioSpectrum`	`map(AudioSpectrum spectrum)`
`void`	`setCoefficientOfVariation(float coefficientOfVariation)`
`void`	`setFractionOfMax(float fractionOfMax)`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LogFrequencyBackgroundRemoval
```
public LogFrequencyBackgroundRemoval(boolean standardize,
                                     int windowLength,
                                     float meanFactor)
```
Parameters:

standardize - standardize results

windowLength - bins to average over

meanFactor - factor a peak must be above average, so that it is not cancelled out

LogFrequencyBackgroundRemoval

public LogFrequencyBackgroundRemoval(boolean standardize)

LogFrequencyBackgroundRemoval
```
public LogFrequencyBackgroundRemoval()
```

Method Detail

getCoefficientOfVariation

public float getCoefficientOfVariation()

setCoefficientOfVariation

public void setCoefficientOfVariation(float coefficientOfVariation)

getFractionOfMax
```
public float getFractionOfMax()
```

setFractionOfMax

public void setFractionOfMax(float fractionOfMax)

map

public AudioSpectrum map(AudioSpectrum spectrum)

Specified by:: map in interface MapFunction<AudioSpectrum>

equals
```
public boolean equals(Object o)
```
Overrides:

equals in class Object

hashCode
```
public int hashCode()
```
Overrides:

hashCode in class Object

toString
```
public String toString()
```
Overrides:

toString in class Object