12. Glossary and Web links
12.1 Glossary
Buffer
RAM cache that is faster than the data that is being delivered. Buffers are used so data may
be stored and delivered to the receiving item as it is needed.
Buffer underrun
A condition where the drive's buffer runs out of data while the CD-R or CD-RW media is still
being written. The recording of a CD is a system-intensive process, and the recorder needs a
constant stream of data. A buffer underrun occurs when the data stream to the recorder is
not fast enough to keep the recorder's buffer full, causing the recording to abort.
CD-DA
Compact Disc-Digital Audio. Launched in October, 1982, CD-DA was the first incarnation of
the compact disc, used to digitally record and play back music.
CD-I
CD-I is a compact disc format developed by Philips, designed to allow interactive multimedia
applications to be run on a CD player connected to a television.
CD-R (Compact Disc Recordable)
Recordable optical disk that has 65O or 700MB storage capacity.
CD-ROM (Compact Disc Read Only Memory)
Small optical disk made of plastic that cannot be erased or written to.
CD-RW (Compact Disc ReWritable)
Rewritable optical disk that has 65OMB or 700MB of storage capacity and which theoretically
can be rewritten 1000 times.
CD-XA (CD-Extended Architecture)
A format developed by Philips and Sony that is intended to store computer data, video and
audio tracks on the same CD-ROM.
Closed Session
When a session is closed, information about its contents is written into the CD's Table of
Contents, and a lead-in and lead-out are written to prepare the CD for a subsequent session.
Controller
This is a component or an electronic card (referred to in this case as a "controller card") that
enables a computer to communicate with or manage certain peripherals. The controller
manages the operation of the peripheral associated with it and links the PC bus to the
peripheral via a ribbon cable inside the PC. An external controller is an expansion card which
fills one of the free slots inside your PC and which enables a peripheral (CD-ROM drive,
scanner or printer, for instance) to be connected to the computer.
DVD-ROM
DVD (Digital Versatile Disk) a disk with a capacity up to 25 times greater than that of a CD-
ROM, which offers digital quality images for superior multimedia processing. The term DVD-
ROM, which indicates it is a disk that can be used in read-only mode, is generally used to
refer to multimedia media. The term DVD-Video refers to the storage of films on DVD media.
Summary of Contents for Dupli 125
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