DVD recordable and DVD rewritable denote to DVD optical disc formats which can be “burned” either rewritable or write once format. DVD recordable is an overall name which denotes to both rewritable and writes-once formats, while DVD writable denotes solely to rewritable formats. The DVD promoted and marketed as 4. 7 GB might seem to keep not more than that for the reason that manufacturers quote the volume of a writable DVD disc utilizing decimal prefixes instead of the binary prefixes utilized by number of software. On the other hand, a 4. 7 GB DVD can be able to accumulate 4.
7 billion bytes, utilizing the binary prefixes which has similar capacity is approximately 4. 38 GiB (Wikipedia, free encyclopedia. August 18, 2006). Dual Layer Recording Dual Layer recoding permits DVD-R and DVD+R discs to accumulate and put in storage extensively more info or data which is capable of 8. 5 Gigabytes per disc, when contrasted with 4. 7 Gigabytes designed for single-layer discs. The DVD-R DL or “dual layer” was technologically advanced for the DVD Forum by the Pioneer Corporation while the DVD+R DL or “dual layer” was technologically advanced intended for the DVD+RW Alliance by Sony.
Below are the two figures of DVD-R DL and DVD+R DL (Wikipedia, free encyclopedia. August 28, 2006). The DVD-Video includes four corresponding systems designed to limit and constraint the DVD user in a variety of procedures and these are the Content Scrambling System, Region codes, disabled user operations (UOP) and Macrovision. *Content Scrambling System* > It is a Digital Rights Management or DRM plan make used on various DVDs. It make uses a weak, proprietary 40 bit stream cipher algorithm which has successively been compromised.
It was in 1996 that the system was presented and established (wikipedia, free encyclopedia. August 26, 2006). *Region Codes* > it is the programming practice, chip, physical barrier, or code which is make used to stop or block the playing media designed for a device which comes from a place where it is introduced and distributed on the version of similar device distributed in another place. It is a kind of a form of vendor lock-in (Wikipedia, free encyclopedia. August 26, 2006). *Disabled User Operations*
> DVD-Video permits the disc to identify or indicate whether or not the handler may carry out any operation like skipping chapters, rewinding or forwarding, selecting a menu which is fundamentally any function on the remote control. This system is named as Prohibited User Operations or User Operation Prohibitions. *Macrovision* > It is a company which makes electronic prevention plans and was established in 1963. The term is occasionally used to denote to specific video copy prevention plans which were technologically advanced by the company. Its features
Some of the DVDs main features are: (1) copy protection built into standard; (2) DVD-ROM for improved multimedia and games applications; (3) every format uses a common file system; (4) DVD-Audio for advanced quality music, graphics and other features and surround sound and optical video and many others; (5) Backwards compatibility with current CD media and many others (see DVD (Digital Versatile Disk)”. http://www. usbyte. com/common/dvd. htm#Introduction). Hence, DVD it is widely used now globally.
1. Bellis, Mary. “DVD”. http://inventors. about. com/library/inventors/bldvd. htm) 2. ”DVD”. August 28, 2006. http://en. wikipedia. org/wiki/DVD 3. Chapin, R. “History of DVD”. http://www. miqrogroove. com/writing/History%20of%20DVD. html 4. “DVD recordable”. Wikipedia, the free encyclopedia. August 18, 2006http://en. wikipedia. org/wiki/DVD_recordable 5. “Content Scramble System”. August 26, 2006. http://en. wikipedia. org/wiki/Content_Scrambling_System 6. “DVD (Digital Versatile Disk)”. http://www. usbyte. com/common/dvd. htm#Introduction