name the versons and format of a dvd
Answers
DVD formats describe the physical properties of the optical disc and how data is stored and manipulated on the disc. The formats are varied according to use, with the largest differences being whether or not the disc is written to. Within each use category, there are often competing formats or implementations.
Contents
1 Non-recordable formats
2 Recordable formats, supported by the DVD Forum
3 Recordable formats, supported by the DVD+RW Alliance
4 Recordable format compatibility
5 Application formats
6 References
Non-recordable formats
DVD-ROM: These are pressed similarly to CDs. The reflective surface is silver or gold colored. They can be single-sided/single-layered, single-sided/double-layered, double-sided/single-layered, or double-sided/double-layered. As of 2004, new double-sided discs have become increasingly rare.
DVD-D: Self-destructing disposable DVD format introduced in 2008. Like EZ-D, it is sold in an airtight package, and begins to destroy itself by oxidation after several hours.
DVD Plus: combines both DVD and CD technologies by providing the CD layer and a DVD layer. Not to be confused with the DVD+ formats below.
Recordable formats, supported by the DVD Forum
DVD-R for Authoring: a special-purpose DVD-R used to record DVD masters, which can then be duplicated to pressed DVDs by a duplication plant. They require a special DVD-R recorder, and are not often used nowadays since many duplicators can now accept ordinary DVD-R masters.
DVD-R (strictly called DVD-R for General): can record up to 4.7 GB in a similar fashion to a CD-R disc. Once recorded and finalized it can be played by most DVD-ROM players.
DVD-RW: can record up to 4.7 GB in a similar fashion to a CD-RW disc.
DVD-R DL: a derivative of DVD-R that uses double-layer recordable discs to store up to 8.5 GB of data.
DVD-RW DL: a derivative of DVD-RW that uses double-layer recordable discs to store up to 8.5 GB of data.
DVD-RAM (current specification is version 2.1): 2.6 GB, 4.7 GB or 9.4 GB (double-sided) discs compatible with only a small proportion of other-format DVD drives. DVD-RAM discs were originally typically housed in a cartridge, though these are now less commonly required. Discs can be removed from their caddy and used in compatible standard-tray drives. Rewritable many more times than other rewritable formats.
DVD-AR: Recordable version of DVD-Audio
Recordable formats, supported by the DVD+RW Alliance
DVD+R: can record up to 4.7 GB, at up to 16× speed. As with DVD-R it can only be recorded on once.
DVD+RW: can record up to 4.7 GB at up to 16× speed. Since it is rewritable it can be overwritten several times. It does not need special "pre-pits" or finalization to be played in a DVD player.
DVD+R DL: a derivate of DVD+R that uses dual-layer recordable discs to store up to 8.5 GB of data.
DVD+RW DL: a derivate of DVD+RW that uses dual-layer recordable discs to store up to 8.5 GB of data.
Recordable format compatibility
DVD drives from 2004 onward should be able to read either of the competing recordable formats; older drives may read DVD+R discs better. As of 2007, DVD drives typically allow writing to both DVD-R[W] and DVD+R[W] discs, making the difference largely irrelevant to the average consumer.