[Asterisk-Users] g711 ulaw vs alaw

Tracy R Reed treed at copilotconsulting.com
Sat Dec 18 19:42:03 MST 2004


On Thu, Dec 16, 2004 at 01:11:34PM +0100, Roy Sigurd Karlsbakk spake thusly:
> >I think there is a bit more difference. The byte code of ulaw is a
> >monotonic function of the amplitude whereas in alaw the code is xor:ed
> >with a bit mask of 0x55.
> 
> Wow! Encryption!

Scary thing is, it would be illegal under DMCA to un-XOR it! (In the US anyway)

-- 
Tracy Reed    http://copilotcom.com 
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