nnmnkwii.preprocessing.inv_mulaw¶
-
nnmnkwii.preprocessing.inv_mulaw(y, mu=256)[source]¶ Inverse of mu-law companding (mu-law expansion)
\[f^{-1}(x) = sign(y) (1 / \mu) (1 + \mu)^{|y|} - 1)\]- Parameters
y (array-like) – Compressed signal. Each value of input signal must be in range of [-1, 1].
mu (number) – Compression parameter
μ.
- Returns
Uncomprresed signal (-1 <= x <= 1)
- Return type
array-like