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Dvd R Vs Dvd R - What's the difference between DVD+R and DVD-R? - DVD R or DVD+R, Specifications

disk data technology cds

Initially it was the Compact Disk that took the world by storm in the 1980’s, and revolutionized audio recording to incorporate greater capacity than ever before through the use of an optical storage disk.
Then in 1996, a number of industry giants such as Sony, Toshiba, Phillips and others developed the Digital Video Disk that extended the recording of media with optical storage devices to include video as well as audio. The CD and the DVD use similar ideology yet the DVD needed to be able to store a greater amount of information due to video containing far more data in addition to an audio track as well.

Specifications

DVDs are essentially two polycarbonate discs of 0.6mm in thickness that are glued together. One disc is imbued with a groove which is later followed by a laser at playback, and is then coated with recording dye, and finished off with silver or gold alloy. The other disk is merely present to ensure the structural integrity of the disk. Contrary to common belief this second disk protects data from being scratched, and so unlike CDs, when users find data integrity to be compromised, it is usually the error handling properties of the player or the technology inherent in DVD-R and DVD+R, rather than actual scratches on the disk.
Both CDs and DVDs adhere to an industry standard of 1.2mm, but the laser beam that is used with DVDs has a wavelength of 640nm rather than that of CDs that is 780nm, and is used with a lens with a greater aperture. The recording dye is scarred with the laser to create the binary format of pitted areas and non pitted areas. With the shorter wavelength of 640nm, DVD lasers can write more pits on the same physical disk area that CDs used.

The DVD-R and also the DVD+R disc has a typical capacity of 4.71GB, but is also found in a dual layer version that holds 8.5 GB. While the DVD+R disc is of the same capacity as DVD-R, it incorporates different technology and so sets a new standard for playback devices.
The inventors of DVD+R utilise an Address in Pre-groove (ADIP) tracking and speed control system that is more reliable than the Land Pre Pit (LPP) system used by DVD-R. Therefore at the higher speeds that we are seeing processors reach today, the DVD+R is more accurate.

DVD-R and DVD+R are strictly unchangeable formats, but both have rewriteable formats that enable data to be changed and altered at will. When rewriting, DVD+RW technology is found to handle errors more efficiently than DVD-RW when errors are thrown during burning, and DVD+RW technology is overall, far more precise in burning data. Further, when the user is using multiple disks, one of the major causes of damage to disks is buffer under-run. DVD+RW technology addresses this with linking methods that are more reliable and that result in fewer errors.

At a lower level of practicality, if the user’s DVD player is manufactured prior to 2004, it is likely that it will only be able to play DVD-R. DVD+R has taken root since then and while DVD-R is far from obsolete, players manufactured today will be found to be hybrid types known as DVD± or Super Multi that support both formats.

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