CDs, DVDs few words………….. which created a history in Media, computers and various other sectors of industry.
Even a layman is familier with these hightech objects, no matter what is the mechanism behind it.Since last decade there has been a revolution in the market regarding these heros of industry…….The main cause is cheap rates, Easy availablity, and the mother cause is Piracy……..Thus CDs and DVDs have overtaken the market and have become largest selling stuffs in the world…..
But in this hightech world there exists a replacement for everything………
Mordern technology, has worked for years and have discovered more efficiant, hightech disks to replace these CDs, DVDs and HD DVDs named HVD.
But we know that HVD is not going to be on our doorsteps tomorrow, but that doesn’t mean it’s not an exciting prospect that we should learn more about!First we should understand the need for HVDs.
Why…. ? This is the biggest question for every innovation to come in existance….
Therefore What makes HVD so special……
- Many movies using DTS audio,from digital audio systems,yakes up enormous space,
much more than dolby digital,hence the no. of DVD’s increases for such movies. - DVD format is now vulnerable, can be decrypted and as a result can be copied as
easily as CDs - The final reason for the change is video quality. DVD video is presented in
480p, or 480 lines per screen, progressive scanned video. High Definition
TV (HDTV) is presented in 720p or 1080i. You won’t notice any difference
without a high definition television, but if you do have an HDTV set,
the improvement in quality is very noticeable.
What is HVD ?
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HVD discs are expected to hold from 100 GB to one 1,000 GB (one teraByte) of data, with an insane data transfer rate of 1 GBit/s. Optware, which is leading the development effort, doesn’t use a single laser beam to read data. Instead, it splits the beam into 1 million narrower beams to read whole pages of data at once. |
Even more impressive, HVD can read and write at the same time, something optical discs can’t do. Also, HVD discs don’t need to spin like DVD discs, since the laser moves and scans rather than being held in place and having the disc spin under it. This is why the data rate is so high. To increase their data rate, CD and DVD drives have to spin faster, but there’s a limit to how fast a disc can be rotated before it literally flies apart. That’s why CD-ROM maxed out at 52X speed. That’s simply not an issue with HVD, where the laser moves instead of the media.
However, it will be 2007 at the earliest before HVD sees the light of day, and then the drives will fetch $3,000. It may end up becoming an option for computing as a means of backup and mass storage. Stay tuned.
HVD is not the only technology in next-generation, high-capacity optical storage media. InPhase Technologies has developed a holographic format they call Tapestry Media, capable of storing up to 1.6TB with a data transfer rate of 120 MB/s. Hitachi Maxell, Ltd. plans to enter the market by offering 300 GB discs with a data transfer rate of 20 Mbit/s. With such a high end storage capacity, it would seem like a better technology than either HD DVD or Blu-Ray Disc.
