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The Creation Of The Compact Disc

A compact disc or CD for short can be defined as an optical disc utilized to store digital data. CDs were originally developed to store digital audio. Yes, a typical compact disc stores audio data in a format compatible with the red book standard. As usual, an audio CD offers several stereo tracks stored by means of 16-bit PCM coding and a sampling rate of 44.1 kHz. It features a circular shape with a 120mm diameter. The 120mm discs are capable of holding up to 74 minutes of audio, while versions holding 80 and even 90 minutes are available too.

In the early 1970s, utilizing video Laserdisc technology, Philips' researchers initiated experiments with audio-only optical discs, originally with wideband frequency modulation FM, later digitized PCM audio signals. At the end of the 70s, Sony, Philips as well as other companies presented their prototypes of digital audio discs.

In 1979, Philips along with Sony made up their mind to join forces, thus setting up a joint taskforce of engineers whose major mission it was to develop the new digital audio disc. Prominent members of the taskforce included Kees Immink and Toshi Doi. After a year of discussions and experiments the taskforce gave birth to Red Book, the Compact Disc standard. Philips greatly contributed to the general manufacturing process, built around on the video Laserdisc technology. Besides this, Philips also contributed the Eight-to-Fourteen Modulation or EFM for short, providing both a large playing time as well as a high resilience against disc handling damage, including scratches and fingerprints. At the same time, Sony contributed the error-correction method, also known as CIRC. The Compact Disc Story, narrated by a former member of the taskforce, offers background information on a variety of technical decisions made, such as the choice of the sampling frequency disc diameter and playing time. As Philips states, the Compact Disc was created collectively by a huge group of folks working as a team.

In 1983, the Compact Disc reached the market and the given event is often considered to be the Big Bang of the digital audio revolution. The new audio disc was warmly received and its handling quality deserved particular praise. From its origins as a music format, it has grown to encompass other applications. Just two years later, in 1985, the CD-ROM was officially introduced. Thanks to this, it’s currently possible to disseminate huge amounts of computer data instead of digital sound.

A compact disc or CD for short can be defined as an optical disc utilized to store digital data. CDs were originally developed to store digital audio. Yes, a typical compact disc stores audio data in a format compatible with the red book standard. As usual, an audio CD offers several stereo tracks stored by means of 16-bit PCM coding and a sampling rate of 44.1 kHz.

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100001362
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CREATED ON
August 28, 2016
COMPLETED ON
August 29, 2016
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