preprocessing.py 文件源码

def __init__(self, win_len=0.025, win_step=0.01,
                 num_filt=40, nfft=512, low_freq=20, high_freq=7800,
                 pre_emph=0.97, win_fun=signal.hamming, **kwargs):

        super(FBank, self).__init__(**kwargs)

        if high_freq > self.fs / 2:
            raise ValueError("high_freq must be less or equal than fs/2")

        self.win_len = win_len
        self.win_step = win_step
        self.num_filt = num_filt
        self.nfft = nfft
        self.low_freq = low_freq
        self.high_freq = high_freq or self.fs / 2
        self.pre_emph = pre_emph
        self.win_fun = win_fun
        self._filterbanks = self._get_filterbanks()

        self._num_feats = self.num_filt