Multiband analysis and synthesis of spectro-temporal modulations of Fourier spectrogram. 
The two-dimensional spectro-temporal modulation filtering concept of the auditory model [T. Chi, P. Ru, and S. A. Shamma, J. Acoust.  Soc.  Am.  118(2), 887-906 (2005)] is implemented on the Fourier spectrogram.  The Fourier magnitude spectrogram is analyzed in terms of its joint spectro-temporal modulations, which embed the temporal dynamics and spectral structures.  Instead of iterative projection methods, the overlap-and-add method is adopted to invert modified Fourier spectrograms back to sounds.  The proposed framework not only provides a similar spectro-temporal analytical process for sounds as the auditory model but also produces synthesized sounds with better quality in a timely manner, which makes proposed framework feasible to human speech recognition (HSR) applications as well.