224:. Like ML-CD, ML-DVD required new drive electronics and special ML media, but no change to the optical pickup-head. In terms of capacity, both ML-DVD-R (recordable) and ML-DVD-ROM discs were specified at 16GB for dual-layer, and 8GB for single-layer. Rewritable media (ML-DVD-RW) offered 8GB (single-layer.) Because of the shared physical characteristics with DVD-ROM pickups, the ML controller-chip was anticipated as a drop-in replacement for existing DVD-drives, greatly reducing cost of ML-DVD capable drives.
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producers and industry backing behind the various DVD recordable formats had become significant. In addition, the ill-fated Sony double-density CD format (DDCD) had already come and gone without any lasting impact on the market. This left ML-CD, another offshoot of the CD, with an uncertain outlook. Suffice it to say, without a launch commitment from drive and blank-media industry, ML-CD drives never reached the consumer-market.
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This time, Calimetrics faced competition from both above and below. From above, there were the two blue-laser formats - the
Philips/Sony backed Blu-ray, and the Toshiba/NEC Advanced Optical Disc (AOD.) Both blue-laser formats were more costly, but offered greater storage (and industry backing.) From
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In 2001, Calimetrics demonstrated hardware prototypes for a 2GB ML-CD reader/writer, using blank-media that was very similar to CD. By the time the ML-CD system was ready to enter consumer production (late 2001), CD-R/RW drives had dropped significantly in price due to the entry of
Taiwanese
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in CD) to 8 levels. The increase in bit-density had a side benefit of increasing data-transfer rate (at the same rotational-velocity of the disc.) MultiLevel, like most of the other strategies proposed for extending CD capacity, was not backward compatible with
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technology: 2GB ML R, RW, and ROM disc playing and recording required ML-capable writers and special ML-CD compatible media. However, the cost to build CD rewriters with both ML and CD support was less than that of DVD-recordable technology.
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Consortium quickly followed and released their own players and movie titles to compete head-to-head against HD DVD. Meanwhile, China, the consumer market most likely to accept ML-DVD for domestic-use, instead chose Taiwan's
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below, Taiwan's home-grown DVD-spinoff (called FVD: Forward
Versatile Disc) offered less capacity than ML-DVD, but enjoyed the backing of Taiwan's governmental research agency as well as Taiwan's semiconductor industry.
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grant to conduct research and development on pit-depth modulated optical data storage systems. Over the years, Calimetrics raised approximately $ 50M from government, venture,
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was an
American technology company founded in 1994 by Terrence Wong, Michael O'Neill, and Thomas Burke. Based on Dr. Wong and Dr. O'Neill's
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The DVD Forum later approved the AOD proposal, which was officially in 2006 as the
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Pit depth modulation, which the company later branded
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