About HD-DVD and Blue-Ray
First glance, the DVD has just been on the rise and are the best option. But developers do not agree, try to find the new needs of poor people. This time, HDTV (High Definition Television) is considered a new technology that video enthusiasts can not live without. Compared to a standard television resolution HDVT several times larger screen and is technically able to show much more fine detail. Of course, all this is available on the special HDTV televisions only. Another aspect is the storage of HDTV video, as even standard DVD-18 with its greater capacity among DVD swill not be able to store several hours of HDTV quality video.
HD-DVD (High Definition DVD), which are visible from its name, is the official successor to DVD format, approved by the DVD Forum. This format is 100% compatible with CDs and DVDs, not only in terms of home user but also on the manufacturing level. Production HD-DVD does not require large investments in new equipment, and that was the reason that these big companies like Intel and Microsoft have decided to support it. Microsoft, for example, has pledged full support for HD DVD in its new Windows Vista due out next year.
A single-layer HD DVD has the same thickness as a DVD layer (0.6mm) and can be up to 15 GB of data. This means that HD DVD will have no problem supporting a disc with two floors and on two sides, in addition, Toshiba has announced the development of triple-layer HD DVD disc contains the other side of the 45GB. The maximum theoretical capacity of HD-DVD is 90GB so.
Blue Ray Disc (BD) standard promoted by Blue Ray Disc Association (BDA), an organization created for this purpose. Throwing compatibility with CD and DVD, it was possible to achieve a much higher capacity than HD DVD. A layer of BD may contain23.3GB, 25 GB or 27 GB of data. When the thickness is much smaller than that on DVD and is only 0.1 mm (against 0.6 for HD-DVD), it is possible to produce multi-layer discs with a high number of layers . The theoretical capacity of blue ray disk is 200 GB. Unfortunately, the production of these drives require the purchase of new equipment.
Blu-Ray are more advanced than the menu, the DVD-Video. The menu offers more features and is usually written in Java. Blu Ray devices require an Internet connection, just like the HD-DVD, they do, and the menu also supports Blu-ray integration of the Internet. As was said before, the Internet is also necessary for the AACS protection. In addition to AACS, the Blu-ray also provided two unique protective measures – ROM Mark and BD + ROM Mark. ROM Mark is a special disk label hidden, like a watermark in DVD-Audio. It can not be copied, and sheets you can not play without it. The BD + technology is designed to control the Blu-ray player has been breached, and if it is true, it will download the new firmware for the Internet in order to determine the appropriate changes. Blu Ray The naming is a bit ‘unusual. Read-only disc is called BD-ROM is called BD-R and rewritable BD-RE are called (rewritable).
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