DVD full form is Digital Versatile Disk or Digital Video Disk. DVD refers to an optical disc storage format used to store high capacity digital data like high-quality videos, software, operating software, and computer files. DVDs provide higher storage capacity than CDs (compact discs) and can be played in multiple types of players like DVD players. DVD differs from a compact disk (CD) in data holding capacity and structural formation.
DVD Full Form
Brief History
The DVD was initially developed as a substitute for VHS tapes, but soon they became popular as a data storage device. Audio CD was developed in 1972 as a medium of entertainment. In 1993, two video disc formats were developed, the Multimedia Compact Disc (MMCD) and the Super Density (SD) disc. DVD took over CD as a medium of entertainment and data storage in 1997.
Structure of a DVD
- The DVD has several layers of polycarbonate plastic pieces with a total thickness of 1.2 millimeters. There will also be some microscopic bumps and pits on the layers. The bumps and pits are covered with the help of a reflective aluminum layer at the inner layer of the plastic. Their outer layers are protected with the help of a fragile layer of semi-reflective gold. The top layer has a coating of lacquer which is strongly bound with the help of infrared light.
DVD Storage Capacity
DVD can be divided into 4 types based on storage capacity:
- Single-sided, Single layer- 4.7 GB
- Single-sided, Double layer – 8.5 GB to 8.7 GB
- Double-sided, Single layer – 9.4 GB
- Double-sided, double layer – 17.08 GB
Physical measurements of a DVD
A DVD comes in two dimensions. 12 cm (120 mm): It is the most common size and is generally used for storing software, movies, operating system, etc. 8 cm (80 mm): This DVD size is generally used for small devices like a portable music players and video camera, etc.
A DVD can be categorized in the following ways based on applications:
- DVD-ROM: It can only be used for reading and cannot be written.
- DVD-R: It can be used to record any data.
- DVD-RW: It can be read, written, erased, and rewritten.
DVD drives are devices that can read and write DVDs on a computer. DVD players are devices that do not require a computer to work and can read DVD-Video and DVD-Audio.
The longevity of a Digital Versatile Disc, full form of DVD, is measured by how long the data remains readable from the disc, that is, how long the disc can be stored until data is lost. Numerous factors affect longevity: composition and quality of the media (recording and substrate layers), humidity and light storage conditions, the quality and medium of the initial recording, etc. A lower temperature and RH are suitable to extend the life of stored data.
Advantages of DVD
- The picture quality is far better than a CD.
- Most DVDs have Dolby Digital or DTS. Thus the clarity of the sound will be nearly equal to that in a theater.
- The DVD has a special on-screen index quality that helps you take a closer look at important scenes of a movie that the publisher of the movie earlier indexed. This method is not common.
- The DVD format can be changed according to the required type of view. It can be a standard TV size format or a wide-screen TV format.
Conclusion
DVD full form is Digital Versatile Disk or Digital Video Disk. It refers to an optical disc storage format that stores high-capacity digital data like high-quality videos, software, operating software, and computer files. DVDs provide higher storage capacity than CDs (compact discs) and can be played in multiple types of players like DVD players. DVD differs from a compact disk (CD) in data holding capacity and structural formation.
Here is everything you need to know about DVD in detail.
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