ulaw#

class diffsptk.MuLawCompression(abs_max: float = 1, mu: int = 255)[source]#

See this page for details.

Parameters:
abs_maxfloat > 0

The absolute maximum value of the input waveform.

muint >= 1

The compression factor, \(\mu\).

forward(x: Tensor) → Tensor[source]#

Compress the input waveform using the \(\mu\)-law algorithm.

Parameters:
xTensor [shape=(…,)]

The input waveform.

Returns:
outTensor [shape=(…,)]

The compressed waveform.

Examples

>>> x = diffsptk.ramp(4)
>>> ulaw = diffsptk.MuLawCompression(4)
>>> y = ulaw(x)
>>> y
tensor([0.0000, 3.0084, 3.5028, 3.7934, 4.0000])
diffsptk.functional.ulaw(x: Tensor, abs_max: float = 1, mu: int = 255) → Tensor[source]#

Compress the input waveform using the \(\mu\)-law algorithm.

Parameters:
xTensor [shape=(…,)]

The input waveform.

abs_maxfloat > 0

The absolute maximum value of the input waveform.

muint >= 1

The compression factor, \(\mu\).

Returns:
outTensor [shape=(…,)]

The compressed waveform.

See also

iulaw