Warped DFT as the basis for psychoacoustic model

We consider the warped DFT as an alternative basis for psychoacoustic models. The appropriate construction of the transform is approached, aiming for precise critical band power analysis. It is shown that sufficient spectral resolution can be obtained for sample block lengths several times shorter than the 1024 or 2048 commonly used in the FFT based ear models. Thus, temporal resolution is improved and comparable with that of more complex perceptual models utilizing filter banks. The computational complexity is estimated as acceptable for realtime processing.