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Topic: Compact disc


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DVD

In the News (Sun 19 Aug 18)

  
  Molecular Expressions: Electricity and Magnetism - Interactive Java Tutorials: How a Compact Disc Works
The compact disc, although appearing to be stationary in the tutorial, should actually be envisioned as rotating at high speed.
As the disc rotates, the beam encounters a series of pits and landings that determine whether the beam is reflected back into the detector (from a landing) or scattered (a pit).
As the disc rotates, light reflected from landings on the disk strikes the photo sensor producing a series of electrical pulses that are coordinated with a timing circuit to generate a stream of 1s and 0s that produce the binary code of information on the disc.
micro.magnet.fsu.edu /electromag/java/cd   (401 words)

  
  Compact Disc Terminology
Compact Disc, a digital medium formed of a 12cm polycarbonate substrate, a reflective metalized layer, and a protective lacquer coating.
These discs are made of a polycarbonate substrate, a layer of organic dye, a metalized reflective layer, and a protective lacquer coating.
CD-R discs do not have true pits and lands, but the unmelted, clear areas and melted, opaque places in the dye layer fulfill the same function as pits and lands on a pressed disc.
www.cd-info.com /refs/terms.html   (902 words)

  
  How compact disc player is made - Background, Raw materials, Design, The manufacturing process of compact disc player, ...
There are basically three subassemblies in a compact disc player: the disc drive mechanism assembly; the optical pick-up assembly; and the electronic circuit board assembly, which coordinates the other systems inside the player and which includes the servo mechanism and data decoding circuitry.
The optical pick-up is usually located underneath the clamp that positions the disc, while the motor that moves the assembly is mounted on the chassis close to the rails.
As previously noted, a compact disc player is a very sophisticated device, and strict quality control measures are adopted from the initial to the final stage of the manufacture to ensure the proper functioning of the player in accordance with industry standards.
www.madehow.com /Volume-1/Compact-Disc-Player.html   (2376 words)

  
  Compact Disc - Wikipedia, the free encyclopedia
Compact disc technology was later adapted for use as a data storage device, known as a CD-ROM, and to include record-once and re-writable media (CD-R and CD-RW).
Compact discs are made from a 1.2 mm thick disc of very pure polycarbonate plastic.
Discs consequently suffer more damage because of defects such as scratches on the label side, whereas clear-side scratches can be repaired by refilling them with plastic of similar index of refraction.
en.wikipedia.org /wiki/Compact_disc   (2673 words)

  
 Compact disc - Encyclopedia, History, Geography and Biography   (Site not responding. Last check: 2007-11-02)
Mini-CD Compact discs are made from a 1.2 mm thick disc of polycarbonate plastic coated with a much thinner layer of Super Purity Aluminium (or rarely, gold, used for its data longevity, such as in some limited-edition audiophile CDs) layer which is protected by a film of lacquer.
Discs are consequently much easier to ruin by scratching the label side, whereas clear-side scratches can be repaired by refilling them with plastic of similar index of refraction.
By the time the compact disc was introduced worldwide digital recording and mixing was becoming commonplace among recording artists and producers known for their interest in fidelity.
www.arikah.net /encyclopedia/Compact_disc   (5300 words)

  
 Super Audio CD - Wikipedia, the free encyclopedia
Because some discs are issued in a hybrid format only, such as the remastered Rolling Stones albums released in 2002, many music buyers are building an SACD collection even if they have no SACD playback equipment and are not specifically inclined to purchase SACDs.
When the disc is placed into an SACD player, the laser is reflected by the high-resolution layer (at 600 µm distance) before it can reach the conventional layer.
These include physical pit modulation and 80 bit encryption of the audio data, with a key encoded on a special area of the disk that is only readable by a licensed SACD device.
en.wikipedia.org /wiki/Super_audio_compact_disc   (2400 words)

  
 Compact disc
Most compact discs have a diameter of 120 mm, which is designed to hold 74 minutes of audio, and in practice slightly more.
The second is that timing markers on the disc with a value between 90 and 99 minutes are normally used to indicate to the player it is reading the beginning of the disc, not the end.
Another technique to increase the capacity of a disc is store data in the lead out groove that is normally used to indicate the end of a disk, and an extra minute or two of recording is often possible.
www.mp3.fm /Compact_disc.htm   (1700 words)

  
 Compact Disc Summary
Compact discs were the first introduction of digital technology to the general public.
Compact disc technology was later adapted for use as a data storage device, known as a CD-ROM, and to include record-once and re-writable media (CD-R and CD-RW).
Compact discs are made from a 1.2 mm thick disc of very pure polycarbonate plastic.
www.bookrags.com /Compact_Disc   (4320 words)

  
 Compact Disc, Video Game Disk & DVD Repair - scratchgone.com
Scratch Gone is the one-stop, simple solution for all your DVD repair, compact disc repair and video game disk repair needs.
Whether you're doing compact disc or DVD repair, you'll want the most professional and cost-effective results.
Compact disc game repair is just as easy as music CD repair and DVD disk repair.
www.scratchgone.com   (356 words)

  
 A Fundamental Introduction to the Compact Disc Player
However, as pervasive as the compact disc player's presence is, the beauty and complexity of its design and operation are underappreciated by most users.
As staggering as the release of the compact disc player was in 1982, the technology and theories which allowed it to be born were long in development.
Regardless of the compact disc's lifetime, it is certain that digital audio will remain, and analog will be reserved to the role of input at the microphone in the studio and output at the speaker in the listening environment.
www.tc.umn.edu /~erick205/Papers/paper.html   (5473 words)

  
 Sony DADC - Compact Disc vom führenden Technologieanbieter   (Site not responding. Last check: 2007-11-02)
Sie wollen eine Compact Disc in Zusammenarbeit mit einem effizienten Partner veröffentlichen?
Sony DADC bietet Ihnen eine effiziente Zusammenarbeit im Bereich Compact Disc.
Bei Fragen rund um das Thema Compact Disc können Ihnen unsere Kundendienstmitarbeiter jederzeit per Telefon oder E-Mail weiterhelfen.
www.sonydadc.com /dvd/compact-disc.htm   (83 words)

  
 History of the CD. History of the Compact Disc. -- OneOff Media, Inc   (Site not responding. Last check: 2007-11-02)
Compact Disc standard proposed by Philips and Sony.
Compact Disc Technology is introduced to Europe and Japan in the fall.
Compact Disc Technology is introduced in the United States in the spring
www.oneoffcd.com /info/historycd.cfm   (736 words)

  
 Compact Disc Formats   (Site not responding. Last check: 2007-11-02)
During the last two decades several Compact Disc formats were developed to serve different purposes and uses.
It is the original and oldest Compact Disc standard and the foundation for all the other standards developed later.
The introduction of this architecture allowed compact discs to be used as an archival medium for computer data.
www.padus.com /support/manuals/401/html/08_Advanced_Concepts/03_Compact_Disc_Formats.htm   (639 words)

  
 Compact disc - Simple English Wikipedia
A compact disc inside of its jewel case.
A compact disc or "CD" is a flat round disc used to store data.
Later, compact discs were made that could be used as a computer storage medium using the same format as audio compact discs.
simple.wikipedia.org /wiki/Compact_disc   (195 words)

  
 How Things Work - Compact Disc Players
But when the scratch is tangential (extending around the disc and along the spiral), it may prevent the player from reading a large portion of an arc.
Since the disc's surface finish must remain smooth and the thickness of the disc shouldn't change much, serious resurfacing is likely to make the disc unplayable.
As the disc turns, the laser slowly moves outward from the middle of the disc toward its edge.
rabi.phys.virginia.edu /HTW/compact_disc_players.html   (3567 words)

  
 Compact disc :: Web Articles ::   (Site not responding. Last check: 2007-11-02)
Compact discs are made from a 1.2 mm thick disc of polycarbonate plastic coated with a much thinner layer of Super Purity Aluminium (or rarely, gold, used for its data longevity, such as in some limited-edition audiophile CDs) layer which is protected by a film of lacquer.
Consequently, discs are much easier to ruin by scratching their label side, whereas clear-side scratches can be repaired by refilling them with plasic of similar index of refraction.
Ripping is the process by which the contents of an audio disc is copied out verbatim to a duplicate disc or re-encoded into some other format, such as MP3.
www.webarticles.com /Computers/Hardware/Compact-disc   (3517 words)

  
 Classical Tango
It is sung by Roberto Goyeneche on a Milan compact disc.
Paula Robison was the flute soloist on an Omega compact disc.
In this RCA Victor Red Seal compact disc, the Saint Louis Symphony Orchestra is conducted by Leonard Slatkin.
www.compactdiscoveries.com /CompactDiscoveriesScripts/69ClassicalTango.html   (1514 words)

  
 Compact Disc - Search Results - ninemsn Encarta   (Site not responding. Last check: 2007-11-02)
Compact Disc (CD), small disc containing data recorded in digital form, a type of computer medium that resulted from audio technology first...
The CD player has all but replaced the conventional record turntable as the preferred way of listening to recorded music.
Beginning in the 1980s, encyclopedia content became available in a compact disc (CD) format.
au.encarta.msn.com /Compact_Disc.html   (152 words)

  
 Audio Compact Disc Player
The tracks on a compact disc are nominally spaced by 1.6 micrometers, close enough that they are able to separate reflected light into it's component colors like a diffraction grating.
The laser is focused to a diameter of about 0.8 mm at the bottom of the disc, but is further focused to about 1.7 micrometers as it passes through the clear plastic substrate to strike the reflective layer.
The angle of cut is such that the plane of polarization parallel to the surface undergoes total internal reflection whereas the plane perpendicular to the surface passes through.
hyperphysics.phy-astr.gsu.edu /hbase/audio/cdplay.html   (497 words)

  
 compact disc
compact disc (CD), a small plastic disc used for the storage of digital data.
As originally developed for audio systems, the sound signal is sampled at a rate of 44,100 times a second, then each sample is measured and digitally encoded on the 4 3/4 in (12 cm) disc as a series of microscopic pits on an otherwise polished surface.
The disc is covered with a transparent coating so that it can be read by a laser beam.
www.factmonster.com /ce6/sci/A0813087.html   (361 words)

  
 Compact Discs   (Site not responding. Last check: 2007-11-02)
The Compact Discs were first introduced in the early 1980s.
And a CD-ROM is physically identical to a Digital Audio compact Disc used in a CD player, but the bits recorded on it are interpreted as computer data instead of music.
The disadvantage is that you can't reuse a disc.
www.sinc.sunysb.edu /Class/cei511/1.html   (841 words)

  
 compact disc — Infoplease.com   (Site not responding. Last check: 2007-11-02)
As originally developed for audio systems, the sound signal is sampled at a rate of 44,100 times a second, then each sample is measured and digitally encoded on the 4 3/4 in (12 cm) disc as a series of microscopic pits on an otherwise polished surface.
The disc is covered with a transparent coating so that it can be read by a laser beam.
Super audio compact disc: a new approach to audio recording and reproduction.
www.infoplease.com /ce6/sci/A0813087.html   (361 words)

  
 64 Music for Autumn
John O'Conor was the pianist on a Telarc compact disc.
Lawrence Foster conducted the Orchestre Philharmonique de Monte-Carlo on a Philips compact disc.
It was performed first by Richard Hayman and his Orchestra on a Naxos compact disc; then by violinists Stéphane Grappelli and Yehudi Menuhin on an Angel CD.
www.compactdiscoveries.com /CompactDiscoveriesScripts/64Autumn.html   (1506 words)

  
 The new CDs: Neither compact nor disks. Discuss. - By Paul Boutin - Slate Magazine   (Site not responding. Last check: 2007-11-02)
To make the sounds listenable on antiquarian CD players, the final mix is retrofitted to compact disc specs by stripping it of billions of bits' worth of musical detail and dynamics.
Yet both kinds of discs, despite being developed in the 'Net-head late '90s, are odd throwbacks to the pre-PC era.
Yet old-fashioned analog connections erode pristine digital sound and are prone to interference from televisions, lights, and computers—the objects they'll be placed next to in modern homes.
slate.msn.com /id/2076336   (1665 words)

  
 New Page 2   (Site not responding. Last check: 2007-11-02)
It is safe to say the compact disc (CD) has been promptly replacing other forms of recorded sound.
To listen to the sounds captured on disc, it must spin continuously while a laser beam shines on the paths and the equipment reads the digits.
Every song appears with the same fidelity and there is no wear on the disc itself, so quality does not deteriorate at all.
www.sinc.sunysb.edu /Class/cei511/cd.htm   (346 words)

  
 Compact Disc Spinoffs   (Site not responding. Last check: 2007-11-02)
A recordable Compact Disc.CD-R technology it useful to law offices and other business that must permanently archive large amounts of information, and it enables individuals to manufacture CD-ROMs for retail.
This version of Compact Disc technology gives the user the flexibility to record and erase multiple times.
In 1995 the DVD Consortium was founded to specify a high-capacity disc technology, known as the Digital Versatile Disk.
cseserv.engr.scu.edu /studentwebpages/MHill/spinoff.htm   (392 words)

  
 compact - Wiktionary
A small folding mirror containing powder that fits into a woman's purse or handbag.
to compact (third-person singular simple present compacts, present participle compacting, simple past compacted, past participle compacted)
compact m (f compacte, m plural compacts, f plural compactes)
en.wiktionary.org /wiki/compact   (199 words)

  
 SNECX.com - tutor.disc   (Site not responding. Last check: 2007-11-02)
Compact disc (CD) is a nice element that can spice up your interface especially if your website is related to music.
I have turned off the background visibility so we can work better on the transparency of the disc.
Now make another selection sized 90x90 and center it on the disc then press Delete to get the shape as shown.
www.snecx.com /core.php?sect=tutor/disc   (506 words)

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