What Is A DVD?
DVD is an optical disc storage technology. DVD is bigger and faster than CD (and CD ROM) and its data storage can hold cinema quality audio and video, images, and computer file data. DVD encompasses home entertainment, computers, and business information in a single digital format. DVD has replaced laserdisc and should eventually replace videotape, audio CD and CD-ROM.
DVD is the abbreviation for Digital Versatile Disc. A DVD is an optical disc which is molded from polycarbonate and has one or more layers of information. This is accomplished by molding two separate discs and bonding them together to create one disc. In addition, one or more reflective coatings are deposited which allow the player to read back the multiple layers of information. Because the data is compressed, it has a much greater storage capacity than a standard compact disc. DVD’s are also Read-only which means that the data has been recorded onto them; they can only be read or played and are not capable of recording.
A DVD is very similar to a CD, but it has a much larger data capacity. A standard DVD holds about seven times more data than a CD does. This huge capacity means that a DVD has enough room to store a full-length, MPEG-2-encoded movie, as well as a lot of other information. Here are the typical contents of a DVD movie: – Up to 133 minutes of high-resolution video – Soundtrack with up to eight languages using 5.
