transforms.py 文件源码

def mdct(x, odd=True):
    """ Calculate modified discrete cosine transform of input signal

    Parameters
    ----------
    X : array_like
        The input signal
    odd : boolean, optional
        Switch to oddly stacked transform. Defaults to :code:`True`.

    Returns
    -------
    out : array_like
        The output signal

    """
    return numpy.real(cmdct(x, odd=odd)) * numpy.sqrt(2)