3
$\begingroup$

How wavelet transform is different from STFT.

I'm not able to understand what is resolution in frequency domain means?

$\endgroup$
  • 1
    $\begingroup$ This should help you. $\endgroup$ – Maxtron Jan 3 at 16:49
2
$\begingroup$

STFT vs CWT

In the STFT, you apply windowing and Fourier transform on the signal using sliding patches and then combine the resulting transforms, which will help you eventually end up with a uniform time/frequency representation of the signal.

In the wavelet transform case, you apply a filter bank on the overall signal at once. In this way, you obtain a coarse-to fine resolution pattern on the time/frequency representation.

Both methods result in similar time/frequency representations which can be derived from each other.

The major differences: (1) STFT is uniform yet CWT is not. (2) You apply STFT on patches, but you apply CWT on the overall signal. (3) STFT involves Fourier transforms but CWT only requires an orthogonal filter bank.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.