( Mode 1, Mode 2 )
Yellow Book is the standard
that defines the format of CD-ROMs, Yellow Book was
the first extension of the Red Book. Yellow Book allowed
CDs to contain 650MB of computer data instead of only
digital audio data. The Yellow Book standard is currently
defined by two data subsets.
The Yellow Book standard defines two data types. Mode
1 describes CD-ROM data with Logical Error Correction
Code (LECC), which provides room for 2,048 bytes of
user data and is the mode used to store data that is
unforgiving of error, like computer programs or databases.
Mode 2 describes sector data stored without LECC, which
provides increased room for 2,336 bytes of user data.
This mode is typically used for data that is more tolerant
of error, like audio, video, or graphics.
Most CD-ROM discs that contain computer
programs or data archives are written using Yellow Book,
Mode 1, ISO 9660 Level 1, for the DOS or Windows platform.
Though these discs can also be accessed on Macintosh
and UNIX platforms, they will not behave like Apple
or UNIX natives volumes. Yellow Book, Mode 1, ISO 9660
Level 1 is the most widely utilized standard since it
will allow virtually all PC's to access it's data. Mode
2 will permit the "combining" of Mode1 and
Mode2 data on a single disc. Mode 2 is primarily the
entertainment portion of the Yellow Book standard. CD-ROM/XA,
Bridge discs (including Photo CD, Karaoke CD, and Video
CD), and Green Book, or CD-i, fall under the Mode2 standard
of Yellow Book. Mode2 discs are intended to be play
on dedicated consumer electronics platforms.