asteroid.filterbanks.stft_fb module

class asteroid.filterbanks.stft_fb.STFTFB(n_filters, kernel_size, stride=None, window=None, **kwargs)

Bases: asteroid.filterbanks.enc_dec.Filterbank

STFT filterbank.

Parameters:

• n_filters (int) – Number of filters. Determines the length of the STFT filters before windowing.
• kernel_size (int) – Length of the filters (i.e the window).
• stride (int, optional) – Stride of the convolution (hop size). If None (default), set to kernel_size // 2.
• window (numpy.ndarray, optional) – If None, defaults to np.sqrt(np.hanning()).

Variables:

n_feats_out (int) – Number of output filters.

filters

Abstract method for filters.

asteroid.filterbanks.stft_fb.perfect_synthesis_window(analysis_window, hop_size)

Computes a window for perfect synthesis given an analysis window and

a hop size.

Parameters:

• analysis_window (np.array) – Analysis window of the transform.
• hop_size (int) – Hop size in number of samples.

Returns:

np.array – the synthesis window to use for perfectly inverting the STFT.