Howtosignalprocessing
Is the STFT the same as a spectrogram?
Explanation: Spectrogram and Short Time Fourier Transform are two different object, yet they are really close together. The spectrogram basically cuts your signal in small windows, and display a range of colors showing the intensity of this or that specific frequency. Exactly as the STFT.
How to calculate STFT in Python?
STFT Algorithm:
Multiply that segment against a half-cosine function. Pad the end of the segment with zeros. Take the Fourier transform of that segment and normalize it into positive and negative frequencies. Combine the energy from the positive and negative frequencies together, and display the one-sided spectrum.
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.
