Glossary
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Cache
Cache is a faster buffer that is used in various areas of a computer to access larger data vo-
lumes faster. Cache ensures a continuous flow of data.
CD-R
Compact Disc-Recordable is a technology for write-once media. The Orange Book standard
defines the storage of audio data and other computer-readable data.
Codec
The compressor/decompressor encodes the data for recording or saving digitally and then
decodes it for playback. Various software codecs are available such as Cinapak, Indeo,
Quicktime, Video for Windows, etc. Hardware codecs include MPEG, H.261, Motion JPEG,
etc.
Disc-At-Once
Disc-At-Once refers to a method in which the laser in your recorder burns straight through in
one session without turning off and on between each track. This method is best when re-
cording Audio CDs you would like to play on your home or car stereo.
Frame
With an Audio CD, 75 sectors provide one second of played music. One sector consists of
up to 98 frames; one frame contains 24 data bytes and 9 control bytes. Similarly, "frame" de-
scribes a full screen in television and video technology. Two successive half images result in
a full screen within a second due to interlacing.
Image
An image refers to a single file on the hard drive that contains the image for a complete disc.
A disk image can be used to create exact copies on media at a later point in time if problems
occur during the write process or if no recorder is connected to your PC. The image requires
as much free space on the hard drive as the contents of the original disc.
Jitter
Jitter refers to an abrupt and undesired change in the signal characteristics. Small gaps oc-
cur in the data stream as a result. Audio correction synchronizes the data by overlapping the
sectors. This way, the gaps are not audible.
Joliet
Joliet refers to an extension of the ISO-9660 standard for file names. Joliet was designed by
Microsoft in order to represent more characters. The file name can be up to 64 characters
long and contain the letters A-Z, a-z, umlauts and the ß.
Label
A label refers to a label on a disc. Some drives, e.g. drives that use LightScribe or Labelflash
technology, can transfer labels directly to special media.
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