DVD-Video Features
The DVD-Video specification provides the following
features:
- 133 minutes of high quality MPEG-2 encoded
video with multi-channel surround sound audio.
- The choice of widescreen, letter box and pan
& scan video formats.
- Audio in up to 8 languages
- Subtitles for a further 32 languages
- Menus and program chains for user interactivity
- Up to 9 camera angles to give the user more
choice
- Digital and analogue copy protection
- Parental control for protection of children
Most DVD-Videos also include extras that cannot be
included on a VHS, such as biographies, director's commentary, making of
the movie etc. An increasing number include DVD-ROM content, which can
range from links to relevant websites to a full game based on the movie.
The use of websites can allow the disc to be used in different ways with
updated text and graphics information on the website complementing the
video on the disc.
The DVD-Video specification is based on a
pre-recorded DVD (DVD-ROM) with UDF Bridge file system. A DVD-Video can
therefore be a DVD-5, DVD-10 or DVD-9 disc depending on the playing time
required and other factors. For overall playing times longer than 133
minutes (including additional content), the dual layer DVD-9 offers a
solution. A DVD-10 is more useful where widescreen and pan & scan
versions are required on the same disc. The use of the DVD-10 format is
not recommended for longer playing times, as the disc needs to be flipped
to play the other side.
DVD-Video discs contain video, audio and other
data using a specific disc structure and directory and file structure.
Within files the data are organised as data streams. |