Overlap-Add (OLA) Interpretation of the STFT
In the OLA interpretation of the STFT, we apply a time-shifted window to our signal , selecting data near time , and compute the Fourier-transform to obtain the spectrum of the th frame. As shown in Fig.9.1, the STFT is viewed as a time-ordered sequence of spectra, one per frame, with the frames overlapping in time.
Filter-Bank Summation (FBS) Interpretation of the STFT
WOLA Processing Steps