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posted by
Fnord666
on Sunday September 17 2017, @11:48AM
from the can-it-descramble-the-adults-on-Peanuts? dept.
from the can-it-descramble-the-adults-on-Peanuts? dept.
Voice inversion is a primitive method of rendering speech unintelligible to prevent eavesdropping of radio or telephone calls. I wrote about some simple ways to reverse it in a previous post. I've since written a software tool, deinvert (on GitHub), that does all this for us. It can also descramble a slightly more advanced scrambling method called split-band inversion. Let's see how that happens behind the scenes.
http://www.windytan.com/2017/09/descrambling-split-band-voice-inversion.html
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Descrambling Split-Band Voice Inversion With Deinvert
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For recreational use only.
(Score: 4, Informative) by driverless on Sunday September 17 2017, @04:51PM
It doesn't even defend against plain hearing. In the 1970s and 1980s there were analysts who could "decode" inverted speech, just from having heard enough of it, since its use then was more common.