# mne.time_frequency.stft¶

mne.time_frequency.stft(x, wsize, tstep=None, verbose=None)[source]

STFT Short-Term Fourier Transform using a sine window.

The transformation is designed to be a tight frame that can be perfectly inverted. It only returns the positive frequencies.

Parameters
xarray, shape (n_signals, n_times)

Containing multi-channels signal.

wsizeint

Length of the STFT window in samples (must be a multiple of 4).

tstepint

Step between successive windows in samples (must be a multiple of 2, a divider of wsize and smaller than wsize/2) (default: wsize/2).

verbose

If not None, override default verbose level (see mne.verbose() and Logging documentation for more).

Returns
Xarray, shape (n_signals, wsize // 2 + 1, n_step)

STFT coefficients for positive frequencies with n_step = ceil(T / tstep).