poledf#

class diffsptk.AllPoleDigitalFilter(filter_order, frame_period, ignore_gain=False)[source]#

See this page for details.

Parameters:

filter_orderint >= 0 [scalar]: Order of filter coefficients, \(M\).
frame_periodint >= 1 [scalar]: Frame period, \(P\).
ignore_gainbool [scalar]: If True, perform filtering without gain.

forward(x, a)[source]#

Apply an all-pole digital filter.

Parameters:

xTensor [shape=(…, T)]: Excitation signal.
aTensor [shape=(…, T/P, M+1)]: Filter coefficients.

Returns:

yTensor [shape=(…, T)]: Output signal.

Examples

>>> x = diffsptk.step(4)
>>> a = diffsptk.ramp(4)
>>> poledf = diffsptk.AllPoleDigitalFilter(0, 1)
>>> y = poledf(x, a.view(-1, 1))
>>> y
tensor([[0., 1., 2., 3., 4.]])