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CD-R(1) (Call Detail Reporting) See call accounting.
(2) (Common Data Rate) The standard 13.5 MHz sampling rate for 480i and 576i digital video systems. See ITU-R BT.601 and CIF.
(3) (Compact Disc-Recordable) A type of CD disc that can be recorded, but not erased. Used to back up and transfer data and to master CD-ROMs, CD-R discs can be written ("burned") and read by most CD/DVD drives. The phrase "burn a CD" really means "burn a CD-R."
The most common CD-R formats hold 650MB (74 minutes) of data or 700MB (80 min.). Also available are 550MB (63 min.), 790MB (90 min.) and 870MB (99 min.), the latter two being non-standard. The higher capacities are achieved by reducing the distance between tracks (track pitch). To record a full 650MB disc takes only a couple minutes using 40x recorders. For speed ratings of drives, see CD-ROM drives.
Change the Reflectivity
The binary 0s and 1s in CDs and CD-ROMs are actual pits (or lack thereof called "lands") stamped into the media. CD-Rs create the equivalent of pits and lands by altering the reflectivity of a dye layer. Different dyes are used, including cyanine (green), pthalo-cyanine (yellow-gold) and metal-azo (blue). See CD-RW, multisession, disc-at-once, track-at-once, CD UDF and optical disc.
A compact-disk format that allows users to record audio or other digital data in such a way that the recording is permanent (nonerasable) and may be read indefinitely. Derived from compact-disk recordable. Also known as compact-disk write-once (CD-WO).
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BUSINESS WIRE)--June 6, 2001 Leading market researcher NPD INTELECT reported today that, over the past 15 months, sales of blank recordable CDs through U.
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