Xref: utzoo rec.ham-radio:4614 sci.crypt:1024
Path: utzoo!utgpu!water!watmath!clyde!att-cb!att-ih!ihnp4!ihuxz!parnass
From: parnass@ihuxz.ATT.COM (Bob Parnass, AJ9S)
Newsgroups: rec.ham-radio,sci.crypt
Subject: Understanding scrambled speech without a descrambler
Message-ID: <2760@ihuxz.ATT.COM>
Date: 17 Apr 88 12:53:01 GMT
Organization: AT&T Bell Laboratories - Naperville, Illinois
Lines: 24


x
   The discussion of copying RTTY by ear is interesting, and
   I've	often thought about such things.

   One of my favorite daydreaming topics is how	humans might
   develop  the	 ability  to  understand  scrambled  speech,
   without using a  descrambler.   I'm	talking	 here  about
   speech  inversion  type  scrambling,	 not  digital  voice
   encryption, or time domain rolling code scrambling.

   Could this ability be developed in a	child  raised  (from
   infancy)  by	 parents  and  teachers	who communicate	only
   through use of a speech inversion scrambler?

   I've	been able to understand	SSB  transmission  fragments
   without  a  product	detector.  However, this is probably
   due to the cadence and context (e.g., recognizing someone
   calling  CQ is much easier than understanding an operator
   describing the weather).

-- 
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Bob Parnass AJ9S - AT&T Bell Laboratories - ihnp4!ihuxz!parnass - (312)979-5414