The full form of DVD is Digital Versatile Disc. DVD is a digital optical disc storage format created in 1995 and used to store large amounts of data, including high-definition films and movies. Before its introduction, VCDs were the industry-standard optical digital storage discs. However, DVDs offer a larger capacity than compact discs despite being roughly the same size and form.
There was also an unofficial full name for DVD: Digital Video Disc. However, mainstream technical forums rejected this usage because DVDs were not just used for videos. It was discovered and created in 1995 by four businesses, Sony, Philips, Sony, Panasonic, and Toshiba.
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History of DVD
- The DVD was first developed to replace VHS tapes but became famous as a storage device.
- In 1972 Audio-CD was established as an entertainment tool.
- In 1993, two video disks were developed, the MMCD (Multimedia Compact Disc) and the SD (Super Density).
Categories of DVD
DVDs are classified depending on their operation, such as:
- DVD-ROM can be used only for reading but can not be written.
- DVD-R is used for recording data of any kind.
- DVD-RW is Readable, writable and can be deleted & rewritten.
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A DVD comes in two different sizes.
- DVD with a size of 120 mm – Used for software, videos, operating system storage and so on.
- DVD with a size of 80 mm – Used for compact devices such as portable music players & video cameras.
Benefits of DVD
- High capacity storage, for example, 4.7 – 9 Gb.
- Excellent sound and picture quality, so the correct approach to store videos & audio.
- They are relatively inexpensive because they are manufactured in mass production.
- Like CDs, data can be preserved on both sides of the DVD.