STFT, Rectangular Window, 50% Overlap

  • Perfect reconstruction
  • Oversampled by 2 (less reliant on aliasing cancellation)
  • Poor channel isolation ( $ \approx 13$ dB)
  • Not very robust to filter-bank modifications, but better
Reducing the hop size to half the window length greatly reduces the amount of aliasing in the filter-bank output signals8.3.1). Recall that this happens because the folding frequency due to downsampling (by the hop size) doubles to coincide with the first zero-crossing of the window transform.

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