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NeroLINUX Glossary •
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programs which can access animations and video and audio sequences. Usually
special players with television screens are used to play CD-i media.
DAE
DAE is the acronym for Digital Audio Extraction. This means that the music tracks
on audio CDs are read in digital format. This is also referred to as audio grabbing.
Not all CD-ROM drives can read music in digital format. Generally, CD-ROM
drives read music tracks in analog format (via the sound card). Using the Nero
CD/DVD Speed program, you can measure the DAE quality of CD drives.
Dependencies
Most program packages coming with a Linux Distribution rely heavily on other
packages. For example, The Gimp, the well-known UNIX image editing program,
requires a library called GTK+ which contains code to visualize dialogs, buttons
etc. In a Microsoft Windows(TM) environment most software packages provide all
the libraries they need themselves. Those libraries are usually copied into the
Windows system directory by the installation routine, a process which not only
requires the user to reboot his machine once the installation procedure has
finished but also increases both the lack of stability of your system and the size of
the software package you want to install. Just imagine two different programs
using the same library in different versions. As windows cannot handle different
versions of the same DLL files effectively, one program ends up overwriting the
library of the other with the consequence that one of the two will usually become
very unstable or will refuse to start at all. To overcome this problem in a
Linux(TM) environment, shared libraries are usually separated from the programs
using them and put into a different library. To avoid a situation in which a program
is installed that needs a certain library which is not, the program's package will
have a dependency set to the library it needs somewhere in the package header.
Thus, the package manager program knows what it takes to make the program
run and can either refuse to install the program or try to install the missing library
as well.
Disc-at-Once
This is a write process which does not create links between the individual
sessions. The recorder starts by writing the lead-in, which is followed by the data
and the lead-out. This process is used primarily by manufacturers of audio CDs.
Disc-at-Once/96 is an extension of Disc-at-Once which gives the software better
control of the burning process. This mode is preferable, if it is available.
DVD
DVD stands for Digital Versatile Disc. It was originally referred to as Digital Video
Disc.
The purpose of developing DVDs was to create a medium which could hold
significantly more data than a CD-ROM. You can store two layers of data on each
side of a DVD. The first layer can hold 4.7 GB and the second layer 3.8 GB,
which means that a single-sided DVD can store 8.5 GB of data. DVDs can only
be read by DVD drives, which can also read CD-ROMs. Unfortunately many DVD
drives are not able to read CD-Rs. Even fewer can read CD-RWs.