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There is a single file format specified for use with all DVD Books A – D. This file system format is UDF/ISO-9660 Bridge. UDF (Universal Disc Format) was designed specifically for optical media and has evolved from the ISO-9660 format. The advantage of this single file system is the capacity of DVD media to be compatible with set top players and personal computers with DVD ROM player.
The upper level of the organization on a DVD is a volume. The volume contains a single DVD-Video zone that contains all data elements for the video title set-top,
and some other areas of DVD that can be used for non-video DVD data elements such as desktop applications.
It is important to note that currently the best players can not the DVD accss Other areas, since they only know how to access the DVD video zone.
Computers can access other areas of DVD and run applications that allow greater interaction with the DVD video zone.
DVD structure volume
At the top of the structure is the DVD in a whole other area with its video and DVD. Within the DVD video zone video is the administrator, a master directory for the data elements, followed from 1 to 99 video title that includes video games and audio elements. The video manager usually includes an introductory video clip, such as a logo and a navigation menu.
Video Title and video sets of objects
After the video are the administrator sets video title. A DVD can contain sets of multiple titles.
Title of the video series (VTS) consists of a VTS menu, and one or more video titles. Titles in turn can be divided into parts of titles (PTT).
The data in the video title object is composed of Video Games (VOBS), which are composed of one or more video objects (VOB). A video object consists of the video audio, navigation data and sub-images to a program.
It is the VOB file is the fundamental element of the DVD media.
The lowest branch of the DVD structure is the cell. Each VOB can be divided into one or more cells. A cell can be as large as the whole film or small as a MPEG GOP (Group of pictures).
For example, a film with 5 chapters would have a video director, a game title, a title, VOBS one composed of a VOB and 10 cells.
Multiple Sets VOBS Title and become visible when creating interactive titles.
A DVD includes an interactive video program music with ten artists, each with five videos, artist information.
In this case, the disk would have: video manager, video ten Title Sets, multiple titles for each video. The reason for this division is that the DVD remote control has both title and the menu buttons. The user can click on the Title button to return to the main DVD menu to select a title, or click the Menu button to go to menus by the special title views.
Kevin Round is a Director of Cofiant, a video editing and dvd authoring company based in the UK. Visit their blog here
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