22
FREECOM Traveller II Series
GB
6
C
HAPTER
6:
Glossary - List of key words
Audio CD
See CD-DA
Bridge Disk
CDs which can be read by CD-ROM/XA drives and CD-I players, for example a
Kodak Photo CD.
Blue Book
Specification for CD-Extra (formerly CD-Plus)
Buffer underrun
When the write memory of the drive is empty, the writing procedure will be
terminated The flow of data from the system to the drive was insufficient.
Either the transfer rate is too low for the writing speed or there was an
interruption in the data flow.
CD-DA
CD-DA stands for "CD Digital Audio" and is the known audio CD standard
described in the Red Book. It contains audio data that is to say music and can
be played back in CD-ROM drives which support audio CDs as well as in normal
CD players in stereo systems.
The audio data is stored as so-called "frames" with a length of 1/75 of a second.
44,100 audio signal samples are stored per second. Each sample uses two bytes
(16 bit), and two channels are stored (left and right). This results in a sector size
of 44,1000 x 2x 2 /75 = 2352 bytes per frame which corresponds to the size of a
physical block on a CD.
CD-I
CD-Interactive, special CD format defined in the Green Book The CD-I track is
not entered into the TOC (CD directory). Thus, the audio tracks can be listened
to on a normal CD player. To access a CD-I track, an appropriate drive is required.
Some older CD players incorrectly recognize the CD-I track as an audio track
and attempt to play it back accordingly.
CD-R
CompactDisc-Recordable, designation for recordable CDs
CD-ROM (Single and Multisesssion)
CD-ROM describes a CD which contains computer data much like a hard disk.
CD-XA
XA stands for "Extended Architecture" and is a standard for Multimedia CDs
containing audio and computer data.
