Article | REF: TE5885 V1

DMAM: digital media, metadata and management

Author: Jean-Noël GOUYET

Publication date: August 10, 2004 | Lire en français

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    2. Media and digital

    After a brief review of the principles of digitization and the evolution of the media towards digital (table 1 ), this paragraph sets out the contours of the digital media field.

    2.1 From analog audio-visual to digital and IT

    Digitization of audio, photo and video media results in a time-discontinuous, number-coded representation of the physical quantity (e.g. the colored light of a captured image, or the acoustic vibration of a sound). This number, made up of binary digits 0 or 1, is then translated into a 2-level electrical signal (low or high), which can be recorded on a magnetic tape (digital VCR/recorder or computer recorder) or on a magnetic or optical disc (CD, DVD). Digital technology therefore...

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