User Guide

Glossary
G - 24
Glossary
in all DVD-storage versions (DVD,
DVD-5, DVD-9, DVD-10, DVD-
18). As a rule, DVD-ROMs include
PC data, such as softwares or data
bases. It is, however, also possible
to save video data on a DVD-ROM.
A DVD-Video is basically only a
special version of the DVD-ROM.
DVD-ROMs can be played back
with PC-DVD-drives.
DVD-Video
Digital Versatile Disc-Video.
One possible
àDVD FORMAT.
Common especially in the field of
home entertainment with movies
as content. According to plans, the
DVD Video will replace the
recorded VHS tape in the near
future. Compared with a VHS cas-
sette, the DVD not only offers
enhanced image quality, but also
several additional features: the
sound on a DVD-Video can be set
to different languages, and subtitles
in even more different languages
can be integrated. The same video
Sequence can be located on the
disk in different camera positions.
The user can then select the
desired sound, fade-in subtitles
and switch between the different
camera positions. All these func-
tions can be realized, but are only
partly used in the case of current
DVDs.
In the case of DVD-Video, the pic-
ture material is coded according to
MPEG-2 (MP@ML), thus realizing
data rates of up to 9.8 Mbps. As a
rule, only data rates between 2 and
8 Mbps are used. A motion picture
with a duration of approx. 135
minutes can be stored on a
àDVD-5 in this quality. The stan-
dard provides DVD-variants for
which video material is coded with
a reduced resolution (according to
MPEG-2 SP@ML and MPEG-1).
These versions are suitable for
DVD applications that require
storage of a maximum of material.
The sound for DVD-Video can be
stored in different formats. It is
generally possible to store the
sound on a DVD as uncompressed
àPCM SOUND (up to 24 bits/96
kHz) or uncompressed audio for-
mat (
àDOLBY DIGITAL AC-3 or
àMPEG-1 Layer 2 MP2). A DVD-
Video has to offer at least one of
these formats.
Right after the introduction of
DVD, the US and Europe disagreed
on the question in which format
the sound was to be stored. The
NTSC countries soon chose Dolby
Digital (AC-3), whereas the PAL
countries concentrated on MPEG.
Meanwhile both formats are
allowed in Europe, and both com-
pression standards are also sup-
ported in NTSC countries.
DVE
Digital Video Effect.
Abbreviation for digital video
effects or device for generating
them.
DVTR
Digital Video Tape Recorder
àDIGITAL RECORDER
EBU
European Broadcasting Union.
Organization of European broad-
casting stations located in Geneva.
The EBU submits standardization
proposals to the
àITU-R.