Digitizer

n. device which converts analog data into digital data (also digitiser)

Digitizing or digitization is representing an object, image, document or a signal (usually an analog signal) by a discrete set of its points or samples. The result is called "digital representation" or, more specifically, a "digital image", for the object, and "digital form", for the signal.Analog signals are continuously variable, both in the number of possible values of the signal at a given time, as well as in the number of points in the signal in a given period of time. However, digital signals are discrete in both of those respects, and so a digitization can only ever be an approximation of the signal it represents. The digital representation does not necessarily lose information from this transformation since the analog signal usually contains both information and noise.
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Noun
1. device for converting analogue signals into digital signals
(synonym) digitiser, analog-digital converter, analog-to-digital converter
(hypernym) data converter
(derivation) digitize, digitise, digitalize, digitalise

1. A device that converts an analog signal into a digital representation of the analog signal. (188 ) Note: A digitizer usually samples the analog signal at a constant sampling rate and encodes each sample into a numeric representation of the amplitude value of the sample. 2. A device that converts the position of a point on a surface into digital coordinate data. (188 )

digitizer
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