Evaluation of the Processing Times in Anuran Sound Classification

Table 1

MPEG-7 features and their origin analysis.

Feature	Symbol	Based on
Total power		Spectrogram analysis
Relevant power; (power in a certain frequency band)
Power centroid
Spectral dispersion
Spectrum flatness
Frequency of the formants (×3); (the three first formants are considered)		Linear prediction coding (LPC) analysis
Bandwidth of the formants (×3); (the three first formants are considered)
Pitch
Harmonic centroid
Harmonic spectral deviation
Harmonic spectral spread
Harmonic spectral variation
Harmonicity ratio		Harmonicity analysis
Upper limit of harmonicity