Delay encoding
In
telecommunication,
delay encoding is the encoding of
binary data to form a two-level
signal such that (a) a "0" causes no change of
signal level unless it is followed by another "0" in which case a
transition to the other level takes place at the end of the first
bit period; and (b) a "1" causes a transition from one level to the other in the middle of the bit period.
Note: Delay encoding is used primarily for encoding radio signals because the frequency spectrum of the encoded signal contains less low-frequency energy than a conventional non-return-to-zero (NRZ) signal and less high-frequency energy than a biphase signal.
Also known as Miller encoding.
Source: from Federal Standard 1037C