Double Density Compact Disc

A family of related optical storage media with density double that of CD media.

This was the name for the CD format proposed by Nimbus Technology and Engineering(1994). It claims to encode more than two hours of a CD, by increasing the number of tracks (narrower tracks)in the disc. Double density, and more, was also demonstrated by Optical Disc Corporation (ODC), which proposed its own High Density CD specifications in late 1993. These efforts, however, did not attract the attention that Philips, Sony, Matshushita, Toshiba and the other major players received for their own proposals--which led to the industry's initial DVD Specifications in late 1995.

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