Yamaha CRW4416E - CRW - CD-RW Drive User Manual download pdf (Page 92)

ser to the disc using the Power Calibration Area (PCA)

area on the recordable disc. See also PCA, Running

OPC

Orange Book The Philips/Sony speciﬁcation for

Compact Disc Magneto Optical (CD-MO), Compact

Disc Write-Once (CD-WO, but commonly called CD-

Recordable or CD-R), and Compact Disc ReWritable

(CD-RW). The Orange Book is divided into three

parts, Part I is devoted to CD-MO, which never got off

the ground, Part II is the CD-R portion, and Part III is

the CD-RW portion. The Orange Book speciﬁed how

the recordable/re-writable discs and constructed and

used by the recording/playback systems. All other CD

formats can be applied to the recordable/re-writable

discs through the Orange Book.

Packet Writing A method of recording on a CD-R,

CD-RW, DVD-R, DVD-RAM, or DVD+RW disc

where “packets” of data are recorded at a time as op-

posed to “tracks” or “discs” at a time. The chief beneﬁt

of packet writing is that the CD recorder can start and

stop recording at will, and so there is no more buffer

underrun problems. However, packet writing can only

be used to record data discs, all other formats must still

use track-at-once or disc-at-once. See Track-at-Once

and Disc-at-once.

PCA See Power Calibration Area

Phase Change Optical recording technology that in-

volves changing the physical phase of the optical me-

dia using a laser. The two states are Crystalline and

Amorphous. Heating the media to a certain tempera-

ture causes the phase to change to Amorphous (dark

mark). Re-heating the same spot to a lower tempera-

ture causes the spot to re-crystallize back to the Crys-

talline state (clear). The Amorphous marks have lower

reﬂectivity than the surrounding Crystalline lands, and

have the same light scattering effects as pits and lands

Glossary

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Yamaha CRW4416E - CRW - CD-RW Drive User Manual Page 92