Is Windowed Fourier Transform a synonym for STFT?

1. Is STFT and FFT same?
2. What is the difference between Fourier transform and short-time Fourier transform?
3. What is short-time Fourier transform used for?
4. What is FFT length in STFT?

Is STFT and FFT same?

If you look closely, there is a difference in the time frame on 3D graphs between STFT and FFT. STFT has smaller time frames, consequently, the frequency spectrum moves smoother over time, therefore it is more accurate. Block size - defines the number of real data samples to be taken for the calculating FFT.

What is the difference between Fourier transform and short-time Fourier transform?

STFT provides the time-localized frequency information for situations in which frequency components of a signal vary over time, whereas the standard Fourier transform provides the frequency information averaged over the entire signal time interval.

What is short-time Fourier transform used for?

The short-time Fourier transform (STFT) is used to analyze how the frequency content of a nonstationary signal changes over time. The magnitude squared of the STFT is known as the spectrogram time-frequency representation of the signal.

What is FFT length in STFT?

512 (default) | positive integer. FFT length, specified as a positive integer. This property determines the length of the STFT output (number of rows).