ialaw#

class diffsptk.ALawExpansion(abs_max=1, a=87.6)[source]#

See this page for details.

Parameters:

abs_maxfloat > 0: Absolute maximum value of input.
afloat >= 1: Compression factor, $A$ .

forward(y)[source]#

Expand waveform by A-law algorithm.

Parameters:

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

Returns:

outTensor [shape=(…,)]: Waveform.

Examples

>>> x = diffsptk.ramp(4)
>>> alaw = diffsptk.ALawCompression(4)
>>> ialaw = diffsptk.ALawExpansion(4)
>>> x2 = ialaw(alaw(x))
>>> x2
tensor([0.0000, 1.0000, 2.0000, 3.0000, 4.0000])

diffsptk.functional.ialaw(y, abs_max=1, a=87.6)[source]#

Expand waveform by A-law algorithm.

Parameters:

yTensor [shape=(…,)]: Compressed waveform.
abs_maxfloat > 0: Absolute maximum value of input.
afloat >= 1: Compression factor, $A$ .

Returns:

outTensor [shape=(…,)]: Waveform.