“…Several front-ends have been proposed in the literature, some of them based on short-term features, such as Mel-Frequency Cepstral Coefficients (MFCC) (Temko and Nadeu, 2006;Zieger, 2008;Zhuang et al, 2010;Kwangyoun and Hanseok, 2011), log filterbank energies (Zhuang et al, 2010), Perceptual Linear Prediction (PLP) (Portelo et al, 2009), log-energy, spectral flux, fundamental entropy and zero-crossing rate (Temko and Nadeu, 2006). Other approaches are based on the application of different temporal integration techniques over these short-term features (Meng et al, 2007;Mejía-Navarrete et al, 2011;Zhang and Schuller, 2012).…”