By admin_wla |
In signal processing, this refers to the representation of quantities in discrete units. The information is contained and manipulated as a series of discrete numbers as opposed to an analog representation, where the information is represented as a continuous signal. In practice, even analog signals are usually processed digitally; in that the analog signal is sampled to create a digital signal that can be processed by inherently digital computers. Source: NASA (http://earthobservatory.nasa.gov/Glossary)
