Interference colors. Iridescent reflections on a compact disc.CD-R disc, bottom side, with interference coloursCD-R (Pencil included for scale)Mini-CD (with ruler for scale)
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Car CD/Cassette Combos

A compact disc (or CD) is an optical disc used to store digital data, originally developed for storing digital audio. It is the standard playback format for commercial audio recordings today. more...

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A standard compact disc, often known as an "audio CD" to differentiate it from later variants, stores audio data in a format compliant with the red book standard. An audio CD consists of several stereo tracks stored using 16-bit PCM coding at a sampling rate of 44.1 kHz. Standard compact discs have a diameter of 120 mm, though 80 mm versions exist in circular and "business-card" forms. The 120 mm discs can hold 74 minutes of audio, and versions holding 80, 90 or even 99 minutes have been introduced. The 80 mm discs are used as "CD-singles" or novelty "business-card CDs". They hold about 20 minutes of audio. Compact disc technology was later adapted for use as a data storage device, known as a CD-ROM.

The design of the CD was originally conceived as an evolution of the gramophone record, rather than primarily as a data storage medium. Only later did the concept of an 'audio file' arise, and the generalising of this to any data file. As a result, the original CD format has a number of limitations; no built-in track names or disc naming for example. Online services such as CDDB were developed to work around these shortcomings in the computer age.

History

In the early 1970s, using video Laserdisc technology, Philips' researchers started experiments with "audio-only" optical discs, initially with wideband frequency modulation FM and later digitized PCM audio signals. At the end of the 1970s, Philips, Sony, and other companies presented prototypes of digital audio discs.

In 1979 Philips and Sony decided to join forces, setting up a joint task force of engineers whose mission was to design the new digital audio disc. Prominent members of the task force were Kees Immink and Toshitada Doi. After a year of experimentation and discussion, the taskforce produced the "Red Book", the Compact Disc standard. Philips contributed the general manufacturing process, based on the video Laserdisc technology. Philips also contributed the Eight-to-Fourteen Modulation, EFM, which offers both a large playing time and a high resilience against disc handling damage such as scratches and fingerprints; while Sony contributed the error-correction method, CIRC. The Compact Disc Story, told by a former member of the taskforce, gives background information on the many technical decisions made, including the choice of the sampling frequency, playing time, and disc diameter. According to Philips, the Compact Disc was thus "invented collectively by a large group of people working as a team."

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Clarion Removeable Face Cassette Player $5.00 Pioneer Dehp3100Ub Scd Receiver with Usb control & Lcd $0.99
Pioneer Keh-1060 Fm/Am With Cassette Player New In Box $49.99 Clarion Indash Unit Vrx925Vd $120.00
Alpine Car Stereo Cd Player As Is $9.99 Kenwood Kdc-Mpv6022 Car Stereo Cd Player $29.99
Alpine Ida-X100 Smart Car Ready Dash Kit And Harness $86.00 Am/Fm Receiver Auto Loading Cd Player $63.95
Pioneer Deh-P9800Bt 50wX4, Bluetooth with iPod Adapter $105.50 Cdx-M610 Sony Xplod Cd Player Active Black Panel (Abp) $15.00
Car Stereo $5.50 Pyramid Cdr49Dx Am/Fm Cd Player Full Detachable System $63.95
Ba-2000Spx Am-Fm Stereo Cassette Player & Speakers 40 w $12.99 Pioneer Deh11E Scd Receiver $1.04
Jvc Kd-G430 Cd receiver with Mp3/Wma playback $49.99 Kenwood Dnx-5120 Touchscreen Dvd Navigation with Usb $489.00
Sony Cdx-Gt300 Cd player with Mp3/Wma playback $49.99 Kenwood Kdc-Mp238Cr Mp3/Wma Receiver Front Aux Input +F $90.75
Kenwood Ddx512 Touchscreen Dvd W/Usb and 3.5 front jack $329.00 Jvc Kd-G110 Car Cd Player $25.00
Pioneer Deh-P3000Ib In-Dash Cd/Mp3/Wma/iTunes Receiver $17.16 sony cd player with xm $75.00
As Is Pioneer Deh-P6800Mp In-Dash Car Cd Player Stereo $24.50 Pioneer Remote Cd-R510 For Cd Player Screen Bluetooth $9.99
Kenwood Kdc-Mp242 Am/Fm/Cd/Mp3 Car Receiver Remote $71.90 duo mp3 multi format digital player $5.00
Jvc Kd-Pdr40 Car Cd/ Mp3 Player With Speakers $250.00 Jvc Kd-R800 In-Dash Cd/Mp3/Usb Receiver w/ Bluetooth $189.95
Jvc Kd-R800 In-Dash Cd/Mp3/Usb Car Stereo Receiver $189.95 New Alpine Cda-9887 Imprint Cd/ Wma/Mp3/Aac/Ipod Player $313.50
Pioneer Cd-iU230V iPod Interface Avic-F900Bt Avic-700Bt $9.95 Kenwood Kdc-Mp535U Car Radio/Cd/Mp3/Usb Drive PlayerNew $159.00
Legacy Lcd15Dx Am/Fm-Mpx Cd Player w/Detachable Face $61.95 Alpine Universal Remote Cd Mp3 Tape Dvd Cda Cde Iva Cdm $12.95
New Belt 4 (1)Vintage Pioneer Tp-900 8-Track Fm Radio $5.99 Pioneer Deh-P6500 Car Cd Player Xm Ready Eq & Grafics $64.99
Grundig Gcm-8200 Car Cassette Player Vintage-Very Rare $1.00 Sony Universal Remote Control For Cd Player Radio Nr $0.99
Sony Xplod Cdx-Gt120 Drive S 52X4 $35.00 Alpine 2-Rca To Ipod Interface Charging Cable In Stereo $5.95
Pyramid 26Kit Deluxe In-Dash Kit New $35.95 Kenwood Kdc-X493 Am/Fm/Cd/Usb Car Stereo Receiver New~ $139.95
Dual Xhd7720 Cd Player Mp3 Hd Radio Usb Port Xhd-7720 $154.95 Alpine Cda-9856 Car Cd/ Mp3 Player Faceplate $26.00
Am/Fm-Mpx Marine Cd/Mp3 Player w Detachable Face Usb Sd $104.95 Kenwood Car Audio Tape Flip Face Krc-805 $19.95
pioneer hideaway unit avh-p6500dvd $25.00 Indash Am Fm Car Radio Receiver Cd Player +4" Speakers $62.95
Brand New! Eclipse Cd4000 Car Cd/ Mp3 Player $119.99
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Prices current as of last update, 11/07/09 5:00pm.

See also...
Aftermarket Receivers, Car CD/Cassette Combos, Car Audio In-Dash Units
Factory & OEM Receivers, Car CD/Cassette Combos, Car Audio In-Dash Units

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