 CD Data Input
Audio CDs have special input specifications. Contact your account representative
for current information.
This guide is relevant for most CD data formats, including CD-ROM, CD-I,
Enhanced CDs, and DVD.
Data Format
Preferred formats: CD, CD-R
Image Format
A CD data image is an exact copy of data that will be transferred onto
a CD and are created with proprietary CD data publishing
systems available from several companies.
Note: CD-R, or one-offs, should not be confused with CD Glass Masters,
which are still required for replication.
Media Labeling
All input materials must be externally labeled. Each label should include
Customer Name, CD-Rom Title, and Original Date.
File Format
ISO9660 - A widely used file format for CD-ROM, the
ISO 960 (previously High Sierra) standard defines a directory
structure accepted by the International Standards Organization.
This standard, which is supported by Microsoft in the MS/Dos
Extensions, allows CD-ROMS to be read like a DOS write-protected
hard disk, which means that it can be read on any platform
that supports ISO 9660.
Apple HFS - The Hierarchical File System (HFS) is typically used by
the Apple environment. These CD-ROMs can be identical to
the hard disk used for development. HFS volume labels allow
27 characters.
Enhanced CDs - This standard contains computer data
and CD quality audio in a variety of formats. Each audio
track on the CD must be 4 seconds long. The standard pause
between tracks is 2 seconds though this can be altered upon
request. To insure playability, an additional
fifteen SMPTE frames of silence is added to the start of
each track. There are 30 SMPTE frames per second.
CD-I, XA, Photo CD are also accepted formats.
Note: For the best performance, please limit the number of files per
subdirectory to 250 in DOS.
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