scipy.signal.ShortTimeFFT.dual_win

property ShortTimeFFT.dual_win

Canonical dual window.

A STFT can be interpreted as the input signal being expressed as a weighted sum of modulated and time-shifted dual windows. Note that for a given window there exist many dual windows. The canonical window is the one with the minimal energy (i.e., \(L_2\) norm).

dual_win has same length as win, namely m_num samples.

If the dual window cannot be calculated a ValueError is raised. This attribute is read only and calculated lazily.

See also

dual_win

Canonical dual window.

m_num

Number of samples in window win.

win

Window function as real- or complex-valued 1d array.

ShortTimeFFT

Class this property belongs to.