EXP Computer EXP CD-Rewriter Bundled S_W - Manual (Page 120)

Adaptec Easy CD Creator Standard Edition
Glossary-6
outs are 2250 sectors (= .5
minute, about 4 MB).
Linked Multisession
A CD containing more than one
session
. All of the data in the var-
ious sessions on CD can be seen
as if it had all been recorded in
one single, large session.
Logical Block
The smallest addressable space
on a CD. Each logical block is
identified by a unique Logical
Block Number (LBN), assigned
in order starting from 0 at the be-
ginning of the CD. Under the ISO
9660 standard, all data on a CD is
addressed in terms of LBNs. At
present, CD recording is sup-
ported at one logical block per
logical sector.
Logical Format
A logical file format, such as ISO
9660 translates the sector-by-
sector view of a CD into a virtual
tree of directories and files. This
makes it easier for applications
and users to use the information
on the CD.
M
Mastering
The process of creating a glass
master from which CDs are re-
produced in quantity. Data is
read from a tape or recordable
CD to a powerful modulated la-
ser beam that engraves the corre-
sponding pits into a
photoresistant surface. In desk-
top recordable CD systems, mas-
tering is done together with
premastering by the desktop CD
recorder. The term mastering is
used to mean recording in
general.
Mixed-Mode Disc
A CD including both data and
audio tracks. The data is written
in CD-ROM or CD-ROM XA for-
mat in the first track of the CD,
and the audio in CD-DA format
in one or more following tracks.
Mode
There are two recording modes
for CDs. In Mode 1, used with
CD-ROM
, 288 bytes of each sec-
tor are used for storing error cor-
rection code
, and the remaining
2048 bytes per sector are avail-
able for user data. Mode 2, used
in CD-I and CD-ROM XA
, has
two forms: Form 1 is similar to
Mode 1, as it is also used to
record data that requires error
correction; Form 2 is used for re-
cording information such as
sound or images that do not re-
quire such extreme precision.
Since less error correction is
needed, more bytes in the sector
can be freed for information stor-
age, resulting in a user data area
of 2336 bytes per sector.
MPEG
Motion Picture Experts Group,
whose name has been applied to
the standard promulgated by the
group for compression of full-
motion video.
MSCDEX
Microsoft DOS extensions for
CD-ROM. Allows the DOS oper-
ating system to recognize a
CD-ROM as a DOS volume.
Multisession
A CD to which data is added in-
crementally in more than one re-