Editing Self-clocking signal (section)

== Implementations ==
Example uses of self-clocking signal protocols include:
*[[Isochronous]]
**[[Manchester code]], where the clock signals occur at the transition points.
**[[Plesiochronous digital hierarchy]] (PDH) signals
**[[Eight-to-fourteen modulation]] (EFM)
**[[4B5B]]
**[[8b/10b encoding]]
**[[64b/66b encoding]]
**[[High-Level Data Link Control|HDLC]]
**[[Modified frequency modulation]] (MFM)
*[[Anisochronous]]
**[[Morse code]]
**[[Asynchronous start-stop]]

Most of these codes can be seen as a kind of [[run-length limited]] (RLL)<ref>{{Cite journal |journal=Proceedings of the IEEE
|volume=78 
|issue=11 
|date=December 1990 |title=Runlength-Limited Sequences
|author=Kees Schouhamer Immink
|authorlink=Kees Schouhamer Immink 
|url=https://www.researchgate.net/publication/2984369
|pages=1745–1759
|quote=A detailed description is furnished of the limiting properties of runlength limited sequences.
 |doi=10.1109/5.63306}}</ref> code. Those constraints on "runs" of zeros and "runs" of ones ensure that transitions occur often enough to keep the receiver synchronized.

Such self-clocking signals can be decoded correctly into a stream of bits without [[bit slip]]. To further decode that stream of bits and decide which bit is the first bit of a byte, often a [[self-synchronizing code]] is used.