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Table 1 Proposed super-Gaussian univariate distribution of speech signal in different domains

From: Speech signal modeling using multivariate distributions

Domain Fitted distribution
Time Laplace [14]
Jointly amplitude and phase of DFT Complex Laplace [17]
Amplitude of DFT Rayleigh [18]
Real and imaginary parts of DFT Laplace, Gamma [6], or generalized Gamma [7]
DCT Laplace [14]