dht#

diffsptk.DHT#

alias of DiscreteHartleyTransform

class diffsptk.DiscreteHartleyTransform(dht_length, dht_type=2)[source]#

Discrete Hartley transform module.

Parameters:

dht_lengthint >= 1

DHT length, $L$.

dht_typeint in [1, 4]

DHT type.

forward(x)[source]#

Apply DHT to input.

Parameters:

xTensor [shape=(…, L)]

Input.

Returns:

outTensor [shape=(…, L)]

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, dht_type=2)[source]#

Compute DHT.

Parameters:

xTensor [shape=(…, L)]

Input signal.

dht_typeint in [1, 4]

DHT type.

Returns:

outTensor [shape=(…, L)]

DHT output.