Editing Coding theory (section)

==Line coding==
{{main|Line code}}

A [[line code]] (also called digital baseband modulation or digital [[baseband]] transmission method) is a [[code]] chosen for use within a [[communications system]] for baseband [[transmission (telecommunications)|transmission]] purposes.

Line coding is often used for digital data transport. It consists of representing the [[Digital signal (electronics)|digital signal]] to be transported by an amplitude- and time-discrete signal that is optimally tuned for the specific properties of the physical channel (and of the receiving equipment). The [[waveform]] pattern of voltage or current used to represent the 1s and 0s of a digital data on a transmission link is called ''line encoding''. The common types of line encoding are [[Unipolar encoding|unipolar]], [[Polar encoding|polar]], [[Bipolar encoding|bipolar]], and [[Manchester encoding]].