Signals can be either analogue or digital. In an analogue signal, the signal is varied continuously with respect to the information. In a digital signal, the information is encoded as a set of discrete values (for example ones and zeros). During transmission the information contained in analogue signals will be degraded by noise. Conversely, unless the noise exceeds a certain threshold, the information contained in digital signals will remain intact. This noise resistance represents a key advantage of digital signals over analogue signals.
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During transmission the information contained in analogue signals will remain intact when the noise exceeds a certain threshold.
During transmission the information contained in analogue signals will be degraded by discrete values.
During transmission the information contained in analogue signals will be degraded by noise.
During transmission the information contained in digital signals will remain intact when the noise exceeds a certain threshold.