IF01091

DVD

DVD (also known as "Digital Versatile Disc" or "Digital Video Disc") is an optical disc storage media format that can be used for data storage, including movies with high video and sound quality. DVDs resemble Compact Discs because their diameter is the same (120 mm or 4.72 inches, or occasionally 80 mm or 3.15 inches), but they are encoded in a different format and at a much higher density.

All read-only DVD discs, regardless of type, are DVD-ROM discs. This includes replicated (factory pressed), recorded (burned), video, audio, and data DVDs. A DVD with properly formatted and structured video content is a DVD-Video disc. DVDs with properly formatted and structured audio are DVD-Audio discs. Everything else (including other types of DVD discs with video) is referred to as a DVD-Data disc. Many people use the term "DVD-ROM" to refer to pressed data discs only, but that is not technically correct.

The term DVD is also being applied as a generic term to describe newer video formats, both Blu-ray Disc and HD DVD.

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