communications Any part of a signal that is not the true or
original signal but is introduced by the communication
mechanism.
A common example would be an electrical signal travelling down
a wire to which noise is added by inductive and capacitive
coupling with other nearby signals (this kind of noise is
the error between the true colour of a point in a scene in the
real world and its representation as a
pixel in a digital
image.
(2003-07-05)