Abstract
This chapter provides an overview of DVD, which stands for digital versatile disk or digital video disc. DVDs are the most recent generation of compact disk technology, and are able to store huge amounts (gigabytes) of data comparable to the hard disk commonly used in computers. DVDs are available in two diameter sizes: 12 cm and 8 cm. The 12 cm DVD is the same size as the familiar CD (audio or ROM), but holds over 25 times more data. This takes the DVD to a qualitatively higher level in terms of its applications. For the first time, a compact disk can hold over 2 hours of high-quality video with six channels of high fidelity surround sound. Being a mass storage device for computer applications and educational/training purposes, it makes use of interactive facilities, and other applications, that include archiving of books and still pictures. The first DVD format, the DVD video, was introduced in 1996, previous to which compact disk (CD) and the Laserdisk were used. The CD had two main formats, audio CD and CD ROM, and the Laserdisk was 30 cm in diameter, and was intended to hold high-quality audio and video of up to 1 hour per side.
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