S> 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 known aS "croSStalk"). A leSS obviouS form of noiSe iSquantiSation noiSe, Such aS 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)
