what is cd ?
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What is CD-Recordable ?
CD-Recordable is compact disc technology that allows the user to create their own CDs. This is done by means of a
recording system that uses “write once” type optical discs standardized by Philips a
nd Sony and documented in the“Orange Book, Part II” and a CD recording device that is connected to a host system. Typically, the host system is a
personal computer which also contains recording software.
What is the Orange Book?
The Orange Book is a document that describes the specification for CD-Write Once (CD-Recordable) technology
developed by Philips and Sony. It defines both the physical structure and dimensions of a CD-R disc as well as the
use of certain portions of the recording surface to record information (the Program Area), to calibrate the recorder
laser power (Power Calibration Area or PCA), to record track information for all sessions (the Program Memory
Area or PMA), and to record the Lead-in and Lead-out Areas that preceed and follow, respectively, the Program Area.
There are several “parts” to the Orange Book. Part II refers to CD-Recordable.
What does Orange Book certified media mean and why?
The Orange Book, Part II is the primary specification for CD-R media. Accordingly, all CD-R media should meet
the Orange Book criteria for recordability and playback. Philips and S
ony, the originators of the Orange Book,provide Orange Book certification of CD-R media.
What is multisession CD ?
The principal purpose of multiple sessions is to allow additional data to be appended to a previously recorded disc.
(Note that some older CD readers can read only the first session of a multisession disc.) A session is defined as an
area including lead-in, program data and lead-out. A CD-R recorder that supports multisession recording can write a
disc that will have multiple sessions linked together, each containing their own lead-in, program and lead-out. Any
multisession-supported CD reader can access the data, whether it was written in the first session or a subsequent
session. Contrast this to the recording structure of a pressed CD-ROM or a CD-R written in “Disc at Once” mode
that contains just one lead-in area and one lead-out area.
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