dht

diffsptk.DHT

alias of DiscreteHartleyTransform

class diffsptk.DiscreteHartleyTransform(dht_length: int, dht_type: int = 2)

Discrete Hartley transform module.

Parameters:

dht_lengthint >= 1

The DHT length, \(L\).

dht_typeint in [1, 4]

The DHT type.

forward(x: Tensor) → Tensor

Apply DHT to the input.

Parameters:

xTensor [shape=(…, L)]

The input.

Returns:

outTensor [shape=(…, L)]

The DHT output.

Examples

>>> x = diffsptk.ramp(3)
>>> dht = diffsptk.DHT(4)
>>> y = dht(x)
>>> y
tensor([ 3.0000, -1.4142, -1.0000, -1.4142])

diffsptk.functional.dht(x: Tensor, dht_type: int = 2) → Tensor

Compute DHT.

Parameters:

xTensor [shape=(…, L)]

The input.

dht_typeint in [1, 4]

The DHT type.

Returns:

outTensor [shape=(…, L)]

The DHT output.

See also

idht