Difference between revisions of "Digital data"
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| − | '''Digital data''', in [[information theory]] and [[Information system|information systems]], are discrete, discontinuous | + | '''Digital data''', in [[information theory]] and [[Information system|information systems]], are discrete, discontinuous [[data]] representating of [[information]]. |
Although digital representations are the subject matter of discrete mathematics, the information represented can be either discrete, such as numbers and letters, or it can be continuous, such as sounds, images, and other measurements. | Although digital representations are the subject matter of discrete mathematics, the information represented can be either discrete, such as numbers and letters, or it can be continuous, such as sounds, images, and other measurements. | ||
Revision as of 07:57, 5 June 2015
Digital data, in information theory and information systems, are discrete, discontinuous data representating of information.
Although digital representations are the subject matter of discrete mathematics, the information represented can be either discrete, such as numbers and letters, or it can be continuous, such as sounds, images, and other measurements.
The word digital comes from the same source as the words digit and digitus (the Latin word for finger), as fingers are often used for discrete counting. Mathematician George Stibitz of Bell Telephone Laboratories used the word digital in reference to the fast electric pulses emitted by a device designed to aim and fire anti-aircraft guns in 1942.
The term is most commonly used in computing and electronics, especially where real-world information is converted to binary numeric form as in digital audio and digital photography.
Analog signals
By contrast, analog signals behave in a continuous manner, or represent information using a continuous function.
