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added rdfpy and rdfonto directories
author nothing@tehis.net
date Tue, 23 Apr 2013 11:49:20 +0100
parents 62d2c72e4223
children
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<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF
   xmlns:dc="http://purl.org/dc/elements/1.1/"	
   xmlns:local="http://sovarr.c4dm.eecs.qmul.ac.uk/features/"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>
  <rdf:Description rdf:about="Mean">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the mean value of the absolute value of the audio samples amplitude</dc:description>	
    <local:tag>Audio</local:tag>
  </rdf:Description>
  <rdf:Description rdf:about="Variance">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the variance of audio samples amplitude</dc:description>	
    <local:tag>Audio</local:tag>
  </rdf:Description>
  <rdf:Description rdf:about="TemporalCentroid">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>time where signal energy is "concentrated"</dc:description>	
    <local:tag>Audio</local:tag>
  </rdf:Description>
  <rdf:Description rdf:about="LogAttackTime">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the base 10 logarithm of the rise time</dc:description>	
    <local:tag>Audio</local:tag>
  </rdf:Description>
  <rdf:Description rdf:about="Energy">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the squared sum of audio samples amplitudes</dc:description>	
    <local:tag>Audio</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="ZeroCrossingRate">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>a measure of the number of time the signal value cross the zero axe, averaged over the whole signal</dc:description>	
    <local:tag>Audio</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="RiseTime">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the time duration between the signal reached 2% of it maximum value to the time it reaches 80% of its maximum value</dc:description>
    <local:tag>Audio</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="Decrease">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>a measure of the amount of decrease in the signal energy</dc:description>
    <local:tag>Audio</local:tag>
  </rdf:Description>
  <rdf:Description rdf:about="SpectralMean">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the spectral power mean value.</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="GeometricMean">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the geometric mean for the spectral power values sequence</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="Energy">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the squared sum of spectral power distribution values</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="SpectralCentroid">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the frequency where the center of mass of the spectral power distribution lies</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="SpectralFlatness">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="MagnitudeKurtosis">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="MFCC">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="MaxMagFreq">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>frequency of the maximum magnitude of the spectrum</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="LowFreqEnergyRelation">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the ratio between the energy over 0-100 Hz band and the whole spectrum energy</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="SpectralSpread">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the variation of the spectrum around its mean value.</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="MagnitudeSkewness">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="Rolloff">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>The spectral roll-off point is the frequency value so that the 85% of the spectral energy is contained below it</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="SpectralSlope">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>the amount of decreasing of the spectral magnitude</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>  
  <rdf:Description rdf:about="HighFrequencyContent">
    <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
    <dc:description>sum of the squared spectrum magnitude multiplied by the wave number of the bin</dc:description>
    <local:tag>Spectral</local:tag>
  </rdf:Description>
</rdf:RDF>