idst

diffsptk.IDST

alias of InverseDiscreteSineTransform

class diffsptk.InverseDiscreteSineTransform(dst_length, dst_type=2)

This is the opposite module to DiscreteSineTransform().

Parameters:

dst_lengthint >= 1

DST length, \(L\).

dst_typeint in [1, 4]

DST type.

forward(y)

Apply inverse DST to input.

Parameters:

yTensor [shape=(…, L)]

Input.

Returns:

outTensor [shape=(…, L)]

Inverse DST output.

Examples

>>> x = diffsptk.ramp(3)
>>> dst = diffsptk.DST(4)
>>> idst = diffsptk.IDST(4)
>>> x2 = idst(dst(x))
>>> x2
tensor([1.1921e-07, 1.0000e+00, 2.0000e+00, 3.0000e+00])

diffsptk.functional.idst(y, dst_type=2)

Compute inverse DST.

Parameters:

yTensor [shape=(…, L)]

Input.

dst_typeint in [1, 4]

DST type.

Returns:

outTensor [shape=(…, L)]

Inverse DST output.

See also

dst