nothing@0: nothing@0: nothing@0: nothing@0: Extract amplitude envelope using hilbert transform, low-pass filtering and decimation. nothing@0: nothing@0: nothing@0: nothing@0: Compute shape statistics of :class:MagnitudeSpectrum, (see [GR2004]_). nothing@0: nothing@0: nothing@0: nothing@0: Feature transform that compute cepstrum coefficients of input feature frames. (use DCT II) nothing@0: nothing@0: nothing@0: nothing@0: Compute energy as root mean square of an audio Frame. nothing@0: nothing@0: nothing@0: nothing@0: SpectralVariation is the normalized correlation of :class:spectrum MagnitudeSpectrum between consecutive frames. (see [GP2004]_) nothing@0: nothing@0: nothing@0: nothing@0: SpectralSlope is computed by linear regression of the spectral amplitude. (see [GP2004]_) nothing@0: nothing@0: nothing@0: nothing@0: Compute onset detection using a complex domain spectral flux method [CD2003]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute :ref:shape statistics shapestatistics of signal frames. nothing@0: nothing@0: nothing@0: nothing@0: Compute autocorrelation coefficients *ac* on each frames. nothing@0: nothing@0: nothing@0: nothing@0: The loudness coefficients are the energy in each Bark band, normalized by the overall sum. see [GP2004]_ and [MG1997]_ for more details. nothing@0: nothing@0: nothing@0: nothing@0: Compute frame's magnitude spectrum, using an analysis window (Hanning or Hamming), or not. nothing@0: nothing@0: nothing@0: nothing@0: Feature transform that compute peaks of the autocorrelation function, outputs peaks and amplitude. nothing@0: nothing@0: nothing@0: nothing@0: Spectral roll-off is the frequency so that 99% of the energy is contained below. see [SS1997]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute the sharpness of :class:Loudness coefficients, according to [GP2004]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute spectral flatness per log-spaced band of 1/4 octave, as proposed in MPEG7 standard. nothing@0: nothing@0: nothing@0: nothing@0: Feature transform that compute the temporal mean and variance of input feature over the given number of frames. nothing@0: nothing@0: nothing@0: nothing@0: Compute zero-crossing rate in frames. see [SS1997]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute the spread of :class:Loudness coefficients, according to [GP2004]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute temporal derivative of input feature. The derivative is approximated by nothing@0: nothing@0: nothing@0: nothing@0: Compute spectral decrease accoding to [GP2004]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute log of :class:OBSI ratio between consecutive octave. nothing@0: nothing@0: nothing@0: nothing@0: Compute the Line Spectral Frequency (LSF) coefficients of a signal frame. Algorithm was adapted from ([TB2006]_, [SH1976]_). nothing@0: nothing@0: nothing@0: nothing@0: Compute Octave band signal intensity using a trigular octave filter bank ([SE2005]_). nothing@0: nothing@0: nothing@0: nothing@0: Compute the Linear Predictor Coefficients (LPC) of a signal frame. It uses autocorrelation and Levinson-Durbin algorithm. see [JM1975]_. nothing@0: nothing@0: nothing@0: nothing@0: Feature transform that compute the slope of input feature over the given number of frames. nothing@0: nothing@0: nothing@0: nothing@0: Centroid, spread, skewness and kurtosis of each frame's amplitude envelope. For more details about moments, see :ref:Shape Statistics shapestatistics. nothing@0: nothing@0: nothing@0: nothing@0: Compute spectral crest factor per log-spaced band of 1/4 octave. nothing@0: nothing@0: nothing@0: nothing@0: Compute the Mel-frequencies cepstrum coefficients [DM1980]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute the Mel-frequencies spectrum [DM1980]_. nothing@0: nothing@0: nothing@0: nothing@0: Compute global spectral flatness using the ratio between geometric and arithmetic mean. nothing@0: nothing@0: nothing@0: nothing@0: Tremelo and Grain description, according to [SE2005]_ and [AE2001]_. nothing@0: nothing@0: nothing@0: nothing@0: Segment input signal into frames. nothing@0: nothing@0: nothing@0: nothing@0: Compute flux of :class:spectrum MagnitudeSpectrum between consecutives frames. nothing@0: nothing@0: nothing@0: nothing@0: Feature transform that compute histogram of input values nothing@0: nothing@0: nothing@0: