companies continue to promote the Blu-Ray and HD-DVD disk.Problem is that this is actually good news as the next headache for us - the end users. Going back a few years ago. At that time we've seen similar comedy of war with the same weapons to different standards for DVD format. Finally, we now have several DVD formats - DVD-RAM, DVD-ROM, DVD-R, DVD + R, etc.
because I can only guess, what will happen with Blu-Ray and HD-DVD devices and I will soon present its main parameters and benefits.
At this point with absolute certainty we can say that the physical dimensions of the new discs will be the same as currently known CD and DVD disk.Glavna difference is smaller wavelength laser used for reading and writing data to disk.
By specification, the Blue-Ray and HD-DVD drive uses a laser that emits light with a wavelength of 405 nm (blue-purple). For example, the specification of all DVD devices use 650 nm (red) wavelengths for reading and writing data on disks. Without a doubt, this difference wavelength means higher capacity Blu-Ray and HD-DVD discs.
The thickness of each of the standard optical disc is 1.2 mm (CD, DVD). It could be summarized that there are three layers in the disk. Transparent layer (lower disk pages - the protective layer), middle layer (which can be viewed as in a mirror), a top layer (where you can put your labels). In a standard DVD disc, the middle layer (the mirror) is located on 0.6 mm deep from the bottom layer. The Blue-ray drive the middle class has moved closer to the epidermis - to 0.1 mm from the surface. Many people say that the Blue-Ray optical drive is more sensitive to accidentally scratch protection layer than any other optical drive. In addition, people think that the laser will be positioned very difficult to read the data. In the new Blue-ray player, the laser is closer to the surface of the disc, which is treated as a risk for scratches. At the end of this problem is solved with TDK and its new protective slojem.Tvrtka experts believe that this new technology provides better protection to the disc than today's DVDs.
in the HD-DVD drive the middle class is located at 0.6 mm from the surface down (protective layer), the same structure as the DVD. This means that new players for HD-DVD can be reverse compatible with current DVD discs.
The capacity factor of Blue-ray drive will be offered in three variants: BD-ROM, BD-R and BD-RE. Each disk will have two different types - a single layer (23.3, 25 and 27 GB) and dual layer (46.6, 50 and 54 GB). In addition, the technology specification will offer multi layered disks, the largest to be 100-200 GB (four and eight layers). For digital camera owners will be available from 8 cm discs with 15GB capacity.
Like the Blue-Ray, HD-DVD drive will be offered in three main variants: HD-DVD-ROM, HD-DVD-R and HD-DVD RW.Kapaciteta HD-DVD drive will be less than Blue-ray disc. For a single layer disc - 15GB and 30 GB for dual layer disc. It's a shame, but multi-layered disc will be available.
founder of the Blue-ray technology, Sony's Sony Corp said that the main aim of the company has set the standard among film companies. So far, Sony has acquired the Walt Disney Pictures, Metro-Goldwyn-Mayer, Entertainment, Sony Pictures Entertainment, 20th Century Fox, Warner Bros, etc. The list also includes other companies - leading providers of PC as Hewlett-Packard, Apple Computer, Dell, Samsung, etc. Microsoft said that it will develop a Blu-Ray technology with these companies, and will not join the Alliance.
HD-DVD-founders are Toshiba and NEC. They say they will invest in HD-DVD player. Film production companies like Warner Bros., New Line Cinema, Universal Studios and Paramount Pictures are also supported and joined Toshiba and NEC care. Giants like Microsoft and Intel are working together to improve HD-DVD standard.
Only time will tell which technology will win a larger share of the market. Do not forget that the fate of one or other technology largely depends on the mood of the end user.
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