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CD-ROM drives are rated with a speed factor relative to music CDs. If a CD-ROM is read at the same rotational speed as an audio CD, the data transfer rate is 150 Kbyte/s, commonly called "1×" (with constant linear velocity, short "CLV"). At this data rate, the track moves along under the laser spot at about 1.2 m/s.
Tracks on a CD-i's program area can be CD-DA tracks or CD-i tracks, but the first track must always be a CD-i track, and all CD-i tracks must be grouped together at the beginning of the area. CD-i tracks are structured according to the CD-ROM XA specification (using either Mode 2 Form 1 or Mode 2 Form 2 modes), and have different classes ...
In later years, the compact disc was adapted for non-audio computer data storage purposes as CD-ROM and its derivatives. First released in Japan in October 1982, the CD was the second optical disc technology to be invented, after the much larger LaserDisc (LD). By 2007, 200 billion CDs (including audio CDs, CD-ROMs and CD-Rs) had been sold ...
CD-i Bridge [18] - a bridge format between CD-ROM XA and the Green Book CD-i, which is the base format for Video CDs, Super Video CDs and Photo CDs. VCD ( Video ) – a standard jointly developed and published by JVC, Matsushita, Philips and Sony.
Grolier's first CD-ROM publication was the text-only Academic American Encyclopedia on CD-ROM in 1985, and was one of the first commercial CD-ROM titles. The text was based on the Academic American Encyclopedia , which comprised 30,000 entries and 9 million words. [ 29 ]
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Originally sold on CD-ROM or DVD, it was also available online via annual subscription, although later articles could also be viewed for free online with advertisements. [1] By 2008, the complete English version, Encarta Premium , consisted of more than 62,000 articles, [ 2 ] numerous photos and illustrations, music clips, videos, interactive ...
The Super NES CD-ROM [1] [a] (commonly abbreviated to SNES CD) is an unreleased add-on for the Super Nintendo Entertainment System (SNES) video game console. It was built upon the functionality of the cartridge -based SNES by adding support for the CD-ROM format.