processing.py 文件源码

def __init__(self, sampling_rate=16000, frame_width=0.032, frame_shift=0.01, num_mel_filters=40, window_func="hanning",
        using_delta=True, using_delta_delta=True):
        assert window_func in ["hanning", "hamming"]
        self.sampling_rate = sampling_rate
        self.frame_width = frame_width
        self.sampling_rate = sampling_rate
        self.frame_width = frame_width
        self.frame_shift = frame_shift
        self.num_fft = int(sampling_rate * frame_width)
        self.num_mel_filters = num_mel_filters

        if window_func == "hanning":
            self.window_func = lambda x:np.hanning(x)
        elif winfunc == "hamming":
            self.window_func = lambda x:np.hamming(x)

        self.using_delta = using_delta
        self.using_delta_delta = using_delta_delta

        self.fbank = fft.get_filterbanks(nfft=self.num_fft, nfilt=num_mel_filters, samplerate=sampling_rate)