What is the Full form of DVD?
The full form of DVD is Digital Versatile Disc. DVD is a digital optical disc storage format which was developed and invented in 1995 and used to store high-capacity files, such as top-standard videos and movies. VCDs were standard optical digital storage disks before invention, but DVDs have higher capacity than compact discs of almost the same size and shape.
The unofficial full name of DVD also existed and it was named Digital Video Disc. But as DVDs were not merely restricted to videos, mass technology forums denied this full term. In 1995 Four companies called Sony, Philips, Sony, Panasonic and Toshiba discovered and developed it.
History of DVD
- The DVD was first developed to replace VHS tapes but soon became famous as a storage device.
- In 1972 Audio-CD was established as an entertainment tool.
- In 1993, two types of video disks were developed, the MMCD (Multimedia Compact Disc), and the SD (Super Density).
Categories of DVD
A DVD comes in two different sizes.
- DVD with a size of 120 mm – Used for software, videos, and operating system storage and so on.
- DVD with a size of 80 mm – Used for compact devices such as portable music player & video camera etc.
DVDs are classified depending on their operation such as
- DVD-ROM can be used only for reading, but it can not be written.
- DVD-R is used for recording data of any kind.
- DVD-RW is Readable, writable and can be deleted & rewritten.
Benefits of DVD
- High capacity storage, for example, 4.7 – 9 Gb.
- Great quality of sound and picture, so the correct approach to store videos & audios.
- Relatively inexpensive, because they are manufactured in mass production.
- Like CD, data can be preserved on both sides of the DVD.