MultiLevel CD-R
A MultiLevel CD-R is a special form of a CD-R with a higher storage capacity than a normal blank CD.
description
In autumn 2000 TDK , Mitsubishi (Verbatim) , Plextor and Calimetrics presented the so-called multi-level recording technology to the public for the first time. MultiLevel CDs can store three times as much data as conventional CDs without compression or narrower tracks . A normal CD stores 1 bit per pit (depression) or land (elevation). The MultiLevel CD also divides the lands into different levels. So instead of just 0 or 1 as with a normal CD, with a MultiLevel CD 0, 1, 2, 3, 4, 5, 6 or 7 can be stored in the same area. The CD-RWs , a similar technique is used. Instead of light and dark areas, 8 different shades of gray are used here. Calimetrics was the actual inventor of this technology and also developed the corresponding components for the drive manufacturers. The MultiLevel media, like the double-density CD blanks , cannot be read or written with normal drives either. The first functional samples and the final logo were presented to journalists at CeBIT in 2001. Although the multi-level recording technology could theoretically even be used for blank DVDs , the media and drives never went into series production. The company Calimetrics has since filed for bankruptcy .