2.1 Introduction to Data Representation

	Data can have multiple forms such as text, audio, images, and video. These different types of data are used
	in different applications such as:

		Video teleconferencing.
		Distributed lectures for higher education.
		Tele-medicine.
		Data retrieval in large video and image databases.
		Augmented reality: placing real-appearing computer graphics and video objects into scenes.
		Voice-recognition system.

	The text material may include the traditional unformatted plain text, formatted text with control characters,
	mathematical expressions, and other symbolic representations such as hypertext.
	The visual material may include line drawings, gray-scale or colored images and photographs, as well as
	animation, simulation, virtual reality objects, video- and tele-conferencing.
	The sound may include telephone/broadcast-quality speech to represent voice, wideband audio for music
	reproduction, and recordings of sounds such as electrocardiograms or other biomedical signals.