DVDteknologi

DVDteknologi refers to the technology behind Digital Versatile Discs (DVDs), optical discs used for storing digital data, including movies and software. Introduced in 1997, DVDs offered significantly larger storage capacity than their predecessor, the Compact Disc (CD). A standard single-layer DVD can hold approximately 4.7 gigabytes of data, while dual-layer discs can store around 8.5 gigabytes.

The technology utilizes a red laser to read and write data, which has a shorter wavelength than the infrared laser used for CDs. This shorter wavelength allows for smaller pits and lands on the disc surface, thus increasing data density. DVDs employ advanced error correction techniques to ensure data integrity.

There are several DVD formats, including DVD-ROM (read-only memory), DVD-R and DVD+R (recordable once), and DVD-RW and DVD+RW (rewritable). Each format has specific advantages and compatibility considerations. DVD players and drives are designed to read these discs, and the standardization of the format made it widely adopted for home entertainment and data distribution. Although newer technologies like Blu-ray have surpassed DVD in storage capacity, DVD remains a relevant format for many applications.