Campus Livre
mu2lin
Converts 8-bit mu-law codes back to linear audio samples.
Category: Data Import and Analysis > Data Import and Export
Syntax
y = mu2lin(mu)Decodes mu-law values from 0 to 255 into samples in the range -1 to 1.
Description
This is the inverse of lin2mu, up to the quantization error. Small amplitudes are reproduced with finer steps than large ones, so the error grows with the signal level.
Input arguments
mu- Mu-law codes, integers from 0 to 255.
Output arguments
y- Linear samples, of the same size as
mu.
Example
Quantization error
y = [-0.9 -0.1 0 0.1 0.9];
z = mu2lin(lin2mu(y))
err = abs(z - y)Output
z = 1×5
-0.8866 -0.0995 0 0.0995 0.8866
err = 1×5
0.0134 0.0005 0 0.0005 0.0134