Wikipedia just throws a couple of equations around, but is not terribly helpful. Without an ITU login, you can't see the actual standard, and few places online go in to exactly what happens in these encodings. Compounded by the problem of the latter being referred to as 'mu-law' and 'u-law' in addition to µ-law (ALT-0181, by the way), the documentation for the two is quite poor.
I have been working on a VoIP application, and wanted to implement the G.711 specification, which I found out had two variants: A-law and µ-law.
