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data items are located are called tracks. Up to 99 tracks may be
stored on an Audio-CD. One track generally corresponds to one
piece of music on the CD.
15.3.2 Sectors
The track itself is made up of units called sectors. A sector contains
2352 bytes, of which - depending on the type of CD used - a
different number may be used for user data. The sector generally
consists of a header, synchronization bits and user data. It may also
have error recognition and correction data. To read a sector, a drive
with single read speed requires 1/75th of a second.
15.3.3 Table of Contents
The initial area of the CD is physically located at the inside of the
CD surface and is approximately 4 mm wide. It contains the Table of
Contents of the CD (TOC) and other information about the CD, such
as the name, the author or the date of the CD.
15.3.4 Single-Session, Multi-Session
The term multi-session practically speaks for itself. A multi-session
CD was produced in several sessions, that are, recording
procedures. The individual sessions may have been written at
random time intervals.
One session consists of at least one track.
A single-session CD is created in only one session, as the name
implies. Audio-CDs are almost always single-session CDs, while
CD-ROMs or Photo-CDs consist of one or more sessions.
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