NRZI

from The Free On-line Dictionary of Computing (8 July 2008)
Non Return to Zero Inverted
NRZI

   <storage> (NRZI) A recording method used for 9-track {magnetic
   tapes} (200 and 800 BPI) where a zero is represented by a
   change in the signal and a one by no change.

   NRZI is also used extensively in {SDLC} communications.
   {VTAM} has a parameter NRZI=YES|NO.

   Compare {Phase Encoded}, {GCR}.

   (1999-01-11)
    
from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)
NRZI
       Non-Return-to-Zero, Invert to ones [encoding]
       
    

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