audio_tools.py 文件源码

def win2mgc(windowed_signal, order=20, alpha=0.35, gamma=-0.41, miniter=2,
        maxiter=30, criteria=0.001, otype=0, verbose=False):
    """
    Accepts 1D or 2D array of windowed signal frames.

    If 2D, assumes time is axis 0.

    Returns mel generalized cepstral coefficients.

    Based on r9y9 Julia code
    https://github.com/r9y9/MelGeneralizedCepstrums.jl
    """
    if len(windowed_signal.shape) == 1:
        sp = np.fft.fft(windowed_signal)
        return _sp2mgc(sp, order=order, alpha=alpha, gamma=gamma,
                miniter=miniter, maxiter=maxiter, criteria=criteria,
                otype=otype, verbose=verbose)
    else:
        raise ValueError("2D input not yet complete for win2mgc")