compact disk invented - EAS

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    Compact disc - Wikipedia

    https://en.wikipedia.org/wiki/Compact_disc

    The compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. In August 1982, the first compact disc was manufactured. It was then released in October 1982 and branded as Digital Audio Compact Disc. The

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    A CD is made from 1.2-millimetre (0.047 in) thick, polycarbonateplastic and weighs 14–33 grams. From the center outward, components are: the center spindle hole (15 mm), the first-transition area (clamping ring), the

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    Audio CD
    The logical format of an audio CD (officially Compact Disc Digital Audio or CD-DA) is described in a document produced in 1980 by the format's joint creators, Sony and Philips. The document is known colloquially as

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    In 1995, material costs were 30 cents for the jewel case and 10 to 15 cents for the CD. Wholesale cost of CDs was $0.75 to $1.15, while the typical

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    Recordable CD
    Recordable Compact Discs, CD-Rs, are injection-molded with a "blank" data spiral. A photosensitive dye is then applied, after which the discs are metalized and lacquer-coated. The write laser of the CD recorderchanges the color of the

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    The Red Book audio specification, except for a simple "anti-copy" statement in the subcode, does not include any copy protectionmechanism.

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  2. Compact Disc: History of the CD - UnifiedManufacturing

    https://www.unifiedmanufacturing.com/blog/history-compact-disk

    07/09/2010 · March 8, 1979- Philips publicly demonstrated a prototype of an optical digital audio disc at a press conference called “Philips Introduce Compact Disc” in Eindhoven, The Netherlands March 13-16, 1979- Technical details of Sony’s digital audio disc were presented during the 62nd AES Convention in Brussels

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  3. History of the CD and the Story of the Compact Disc ...

    https://www.voices.com/blog/history-compact-disc

    21/06/2013 · 1969: The idea of a compact disc was born in the mind of Klass Compaan, a Ducth physicist. 1970: A glass disc prototype that was readable by laser was created by Klass Compaan and Pete Kramer at Philips. 1971: Intel produced the microprocessor. 1972: First color prototype of the compact disc produced by Kramer and Compaan.

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  4. History of the CD: 40 years of the compact disc - CBBC ...

    https://www.bbc.co.uk/newsround/47441962

    12/03/2019 · Forty years ago the world got its first glimpse of what would become one of the most important music devices in history - the compact disc (CD). The CD was invented in 1979.

  5. James T. Russell: Inventor of The Compact Disc - Ilmusiana

    https://www.ilmusiana.com/2016/05/james-t-russell...

    James T. Russell: Inventor of The Compact Disc. James Russell developed the concepts underlying the compact disc (CD) and the digital video disc (DVD), both widely popular technologies that use light to store data. Russell's ideas were somewhat ahead of their time, and Russell has never profited materially from his inventions.

  6. Compact Disc Explained - Everything You Need To Know

    https://history-computer.com/compact-disc

    04/01/2021 · The first workable digital compact disc device, the precursor on now-ubiquitous CD/DVDs, was invented in the late 1960s by the American physicist James Russell. In 1953, Russell earned his Bachelor’s degree in physics and graduated from Reed College in Portland.

  7. History of the Compact Disc

    https://www.discmakers.co.uk/history-of-the-compact-disc

    A Quick History of the Compact Disc: The CD was unveiled to the world in March 1979, and the first compact disc was produced in a factory in Germany after years of development by Philips and Sony. The compact disc project was launched following Philips' failure with its video disc technology in 1978.

  8. History of the Compact Disc | Low End Mac

    https://lowendmac.com/2014/history-of-the-
    • Sony introduced the CDP-101, the first CD audio player to market, on October 1, 1982 at $900. As the first players surfaced on the market that year, the compact disc format began to attract widespread usage and popularity in Japan and Europe. Compact discs themselves were at first extremely expensive at $30 each. CDs were manufactured at only two facilities in the entire worl…
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    • When Was The Compact Disc Invented? - Blurtit

      https://science.blurtit.com/867

      The compact disc or CD was introduced in the year 1982. It was originally developed for storing digital audio and digital data. It all started in the year 1979, when Philips and Sony got together to design a new digital audio disc.



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