iulaw¶

class diffsptk.MuLawExpansion(abs_max=1, mu=255)[source]¶

See this page for details.

Parameters

abs_maxfloat > 0 [scalar]: Absolute maximum value of input.
muint >= 1 [scalar]: Compression factor, \(\mu\).

forward(y)[source]¶

Expand waveform by \(\mu\)-law algorithm.

Parameters

yTensor [shape=(…,)]: Compressed waveform.

Returns

xTensor [shape=(…,)]: Waveform.

Examples

>>> x = diffsptk.ramp(4)
>>> ulaw = diffsptk.MuLawCompression(4)
>>> iulaw = diffsptk.MuLawExpansion(4)
>>> x2 = iulaw(ulaw(x))
>>> x2
tensor([0.0000, 1.0000, 2.0000, 3.0000, 4.0000])