| podobné slovo | definícia |
compact disc read-only memory
(msas) | Compact Disc Read-Only Memory
- CD-ROM |
compact disc recordable
(msas) | Compact Disc Recordable
- CD-R |
compact disc write-once
(msas) | Compact Disc Write-Once
- CD-WO |
compact disc read-only memory
(msasasci) | Compact Disc Read-Only Memory
- CD-ROM |
compact disc recordable
(msasasci) | Compact Disc Recordable
- CD-R |
compact disc write-once
(msasasci) | Compact Disc Write-Once
- CD-WO |
compact disc read-only memory
(encz) | compact disc read-only memory, n: |
compact disc recordable
(encz) | compact disc recordable, n: |
compact disc write-once
(encz) | compact disc write-once, n: |
audio compact disc
(wn) | audio compact disc
n 1: compact discs used to reproduce sound (voice and music)
[syn: audio CD, audio compact disc] |
compact disc read-only memory
(wn) | compact disc read-only memory
n 1: a compact disk that is used with a computer (rather than
with an audio system); a large amount of digital
information can be stored and accessed but it cannot be
altered by the user [syn: CD-ROM, {compact disc read-only
memory}] |
compact disc recordable
(wn) | compact disc recordable
n 1: a compact disc on which you can write only once and
thereafter is read-only memory [syn: CD-R, {compact disc
recordable}, CD-WO, compact disc write-once] |
compact disc write-once
(wn) | compact disc write-once
n 1: a compact disc on which you can write only once and
thereafter is read-only memory [syn: CD-R, {compact disc
recordable}, CD-WO, compact disc write-once] |
compact disc interactive
(foldoc) | Compact Disc interactive
CD-i
(CD-i) An embedded application of CD-ROM allowing
the user limited interaction with films, games and educational
applications via a special controller.
(1994-11-02)
|
compact disc read-only memory
(foldoc) | Compact Disc Read-Only Memory
CD-ROM
CD-ROM drive
(CD-ROM) A non-volatile optical data storage
medium using the same physical format as audio {compact
discs}, readable by a computer with a CD-ROM drive.
CD-ROM is popular for distribution of large databases,
software and especially multimedia applications. The
maximum capacity is about 600 megabytes. A CD can store
around 640 megabytes of data - about 12 billion bytes per
pound weight.
CD-ROM drives are rated with a speed factor relative to music
CDs (1x or 1-speed which gives a data transfer rate of 150
kilobytes per second). 12x drives were common in April
1997. Above 12x speed, there are problems with vibration and
heat. Constant angular velocity (CAV) drives give speeds up
to 20x but due to the nature of CAV the actual throughput
increase over 12x is less than 20/12.
20x was thought to be the maximum speed due to mechanical
constraints but on 1998-02-24, Samsung Electronics
introduced the SCR-3230, a 32x CD-ROM drive which uses a ball
bearing system to balance the spinning CD-ROM in the drive to
reduce noise.
CD-ROM drives may connect to an IDE interface, a SCSI
interface or a propritary interface, of which there are three
- Sony, Panasonic, and Mitsumi. Most CD-ROM drives can also
play audio CDs.
There are several formats used for CD-ROM data, including
Green Book CD-ROM, White Book CD-ROM and {Yellow Book
CD-ROM}. ISO 9660 defines a standard file system, later
extended by Joliet.
See also Compact Disc Recordable, Digital Versatile Disc.
{Byte, February 1997
(http://byte.com/art/9702/sec17/art5.htm)}.
(2006-09-25)
|
compact disc read-write
(foldoc) | Compact Disc Rewritable
CD-Read-Write
CD-Rewritable
CD-RW
Compact Disc Read-Write
(CD-RW) A rewritable version of CD-ROM. A CD-RW
drive can write about 650 megabytes of data to CD-RW media
an unlimited number of times. Most CD-RW drives can also
write once to CD-R media.
CD-RW media cannot be read by CD-ROM drives built prior to
1997 due to the reduced reflectivity (15% compared to 70%) of
CD-RW media.
CD-RW drives and media are currently (1999) more expensive
than CD-R drives and media. CD-R is sometimes considered a
better technology for archival purposes as the data cannot be
accidentally modified or tampered with, and encourages better
archival practices.
Standard prerecorded CDs have their information permanently
stamped into an aluminium reflecting layer. CD-WR discs have
a phase-change recording layer and an additional silver
(aluminium) reflecting layer.
A laser beam can melt crystals in the recording layer into a
non-crystalline amorphous phase or anneal them slowly at a
lower temperature back to the crystalline state. The different
reflectance of the areas make them appear as the 'pits' and
'lands' of a standard CD.
{Phillips: New Technologies
(http://www-us.sv.philips.com/newtech/cdrewritable.html)}.
See also CD-R and DVD-RAM.
(1999-08-01)
|
compact disc recordable
(foldoc) | Compact Disc Recordable
(CD-R) A write-once version of CD-ROM. CD-Rs can
hold about 650 megabytes of data. They are very durable and
can be read by normal CD-ROM drives, but once data has been
written it cannot be altered.
Standard prerecorded CDs have their information permanently
stamped into an aluminium reflecting layer. CD-R discs have a
dye-based recording layer and an additional golden reflecting
layer.
Digital information is written to the disc by burning
(forming) pits in the recording layer in a pattern
corresponding to that of a conventional CD.
The laser beam heats the substrate and recording layer to
approximately 250 C. The recording layer melts and the
substrate expands into the space that becomes available.
{Phillips: New Technologies
(http://www-us.sv.philips.com/newtech/cdrewritable.html)}.
See also CD-RW and DVD-RAM.
(1999-08-01)
|
compact disc rewritable
(foldoc) | Compact Disc Rewritable
CD-Read-Write
CD-Rewritable
CD-RW
Compact Disc Read-Write
(CD-RW) A rewritable version of CD-ROM. A CD-RW
drive can write about 650 megabytes of data to CD-RW media
an unlimited number of times. Most CD-RW drives can also
write once to CD-R media.
CD-RW media cannot be read by CD-ROM drives built prior to
1997 due to the reduced reflectivity (15% compared to 70%) of
CD-RW media.
CD-RW drives and media are currently (1999) more expensive
than CD-R drives and media. CD-R is sometimes considered a
better technology for archival purposes as the data cannot be
accidentally modified or tampered with, and encourages better
archival practices.
Standard prerecorded CDs have their information permanently
stamped into an aluminium reflecting layer. CD-WR discs have
a phase-change recording layer and an additional silver
(aluminium) reflecting layer.
A laser beam can melt crystals in the recording layer into a
non-crystalline amorphous phase or anneal them slowly at a
lower temperature back to the crystalline state. The different
reflectance of the areas make them appear as the 'pits' and
'lands' of a standard CD.
{Phillips: New Technologies
(http://www-us.sv.philips.com/newtech/cdrewritable.html)}.
See also CD-R and DVD-RAM.
(1999-08-01)
|
compact disc writer
(foldoc) | Compact Disc writer
CD burner
(CD burner) A device that can write data to {Compact
Disc Recordable} (CD-R) or Compact Disc Rewritable (CD-RW)
discs. Now both these CD formats are often combined with a
DVD writer.
(2008-09-16)
|
multimedia compact disc
(foldoc) | MultiMedia Compact Disc
(MMCD) A CD-ROM standard for storing 4.7 GB of
data including video. MMCD is being developed by a large
numer of computer manufacturers and is expected to be shipped
in late 1996 or early 1997. Initially it will be aimed at the
consumer market, then perhaps in CD-ROM format for
computers, and maybe later on erasble CD.
(1995-11-23)
|
video compact disc
(foldoc) | Video Compact Disc
VCD
(VCD) A storage format used for film distribution.
[Details? Relationship to audio CD?]
(2004-02-15)
|