Difference between revisions of "Non Return to Zero Inverted"
From Computer History Wiki
(Gives the essence) |
m (Jnc moved page Non return to zero inverted to Non Return to Zero Inverted: Usually the acronym) |
(No difference)
|
Revision as of 04:48, 23 April 2018
Non return to zero inverted (usually given as the acronym, NRZI) is an encoding technique which is commonly used on magnetic storage.
In NRZI, whether a particular bit is '0' or '1' is indicated by the presence or absence of a level transition at each clock time.
The disadvantage of NRZI is that a long strings of whichever value does not cause a level transition makes it hard to make sure that the clock stays in synchronization. For this reason, many NRZI encooding systems make use of either bit stuffing or run-length limited coding to limit the maximum number of transition-less bit times.