asteroid.filterbanks.multiphase_gammatone_fb module¶

class asteroid.filterbanks.multiphase_gammatone_fb.MultiphaseGammatoneFB(n_filters=128, kernel_size=16, sample_rate=8000, stride=None, **kwargs)[source]¶

Bases: asteroid.filterbanks.enc_dec.Filterbank

Multi-Phase Gammatone Filterbank as described in [1]. Please cite [1] whenever using this. Original code repository: <https://github.com/sp-uhh/mp-gtf>

Parameters:	n_filters (int) – Number of filters. kernel_size (int) – Length of the filters. sample_rate (int, optional) – The sample rate (used for initialization). stride (int, optional) – Stride of the convolution. If None (default), set to `kernel_size // 2`.

References: [1] David Ditter, Timo Gerkmann, “A Multi-Phase Gammatone Filterbank for

Speech Separation via TasNet”, ICASSP 2020 Available: <https://ieeexplore.ieee.org/document/9053602/>

filters¶: Abstract method for filters.

asteroid.filterbanks.multiphase_gammatone_fb.erb_scale_2_freq_hz(freq_erb)[source]¶: Convert frequency on ERB scale to frequency in Hertz

asteroid.filterbanks.multiphase_gammatone_fb.freq_hz_2_erb_scale(freq_hz)[source]¶: Convert frequency in Hertz to frequency on ERB scale

asteroid.filterbanks.multiphase_gammatone_fb.gammatone_impulse_response(samplerate_hz, len_sec, center_freq_hz, phase_shift)[source]¶: Generate single parametrized gammatone filter

asteroid.filterbanks.multiphase_gammatone_fb.generate_mpgtf(samplerate_hz, len_sec, n_filters)[source]¶

asteroid.filterbanks.multiphase_gammatone_fb.normalize_filters(filterbank)[source]¶: Normalizes a filterbank such that all filters have the same root mean square (RMS).