ulaw#

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

See this page for details.

Parameters:

abs_maxfloat > 0

Absolute maximum value of input.

muint >= 1

Compression factor, $\mu$.

forward(x)[source]#

Compress waveform by $\mu$-law algorithm.

Parameters:

xTensor [shape=(…,)]

Waveform.

Returns:

outTensor [shape=(…,)]

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, abs_max=1, mu=255)[source]#

Compress waveform by $\mu$-law algorithm.

Parameters:

xTensor [shape=(…,)]

Waveform.

abs_maxfloat > 0

Absolute maximum value of input.

muint >= 1

Compression factor, $\mu$.

Returns:

outTensor [shape=(…,)]

Compressed waveform.