Next
Back
Other options
Red Book
Specification for audio CDs.
Session
A session is one sitting with the recorder. Audio CDs are always single sessions. Data CDs can be recorded over several sittings and the CDs can be used right
from the start (multisession). However, the CDs can only be recognised by reading devices once they have been fully recorded and fixed.
Single session
The CD is recorded in one sitting (session). Audio CDs are always single session CDs.
Thermal Calibration
Procedure for adapting hard disks to the effects of thermal expansion. The hard disk cannot be accessed while it is calibrating. This can be a sufficient amount of
time to empty the driver’s buffer space. This leads to a ‘buffer underrun’ which will interrupt the writing procedure and will render the blank disc unusable. It is
not possible to control the moment at which calibration takes place. If no calibration occurred beforehand but happens during writing, even a test-run of the drive
can occur. This type of hard disk is unsuitable as a source drive (or for physical and virtual images).
TOC
Table of Contents, Directory of the CD. The table of contents documents not only the number of tracks but also their starting position and the total length of the
data area of the disc.
Track
A track is a section of the CD. Every audio title has its own track. In contrast, all the data of a data CD is contained within a single track. A Mixed-Mode CD has a
data track (track 1) and audio tracks. The data track cannot be played back with an audio player. Older devices can produce a whistling sound which can damage
your stereo system. The data track for CDs conforming to the Blue Book standard (CD-Extra, CD-Plus) is located at the end of the CD.
Track-at-Once
“Track-at-Once” is a method of writing by which all tracks are written individually. For data CDs there is no significant difference to “Disc-at-Once”; however, a
gap of two seconds is appended to every track of an audio CD. Some CD recorders can only write according to this method.
Virtual Image
The data structure of a CD is different to those of other media. The writing program must first convert the data in to an appropriate form before it sends it to the
recorder. The virtual image is constantly updated during the writing procedure. This requires a computer system with enough power to handle the complexity of
the data. The virtual image requires approx. 30MB of free hard disk space. It is automatically deleted after the writing procedure. Writing with virtual images is
also known as “On-the-Fly.” If problems occur (insufficient data transfer rates), you should use physical images to separate the image creation and data
transfer/writing processes.
Yellow Book
Specification for CD-ROM (data CDs) and CD-ROM XA.
Additional and updated
information can be found
directly on our fully
interactive website
www.memorex.com
15
ThirtyTwoMAXX
Glossary
US
