ABSTRACT
A digital versatile disc (DVD) is a new recording medium, replacing the compact disc (CD), for storing digital moving picture data compressed by using MPEG2. The data format of CD is suited to music (audio) which is continuous stream data. It is not always suited to recording of computer data which is often rewritten partly. The DVD is developed “as a completely new package medium suited to both computer applications and AV (audio visual) applications.” Recording of movie was taken into consideration as an AV application. As a result, in the DVD specification, the memory capacity is 4.7G bytes single layer disc and 8.5G bytes for dual layer disc on one side of a 12-cm disc (Fig. 5.1). It corresponds, for example, to 135 minutes of MPEG2 data containing the picture, voice in three languages and subtitles in four languages. This capacity is enough to record most films completely. Single layer disk and dual layer disk. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315214719/0fb871de-cdc7-4110-bdc0-1b5d88b350ec/content/fig5_1.tif"/>
