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{{merge|DVD-R|DVD+RW|DVD-RW|DVD recordable|discuss=Talk:DVD recordable#Proposed merge with DVD-R - DVD+R - DVD-RW - DVD+RW|date=April 2013}}
#REDIRECT [[DVD recordable#DVD+R and DVD+RW (DVD "plus")]]
{{Optical disc authoring}}
[[Image:Sony Single DVD+R.JPG|thumb|right|Two DVD+R discs, showing the factory label on the front face and the visible, foil layer on the reverse]]
A '''DVD+R''' is a recordable [[optical disc recording technologies|optical disc]]. It is similar to, but incompatible with, the older [[DVD-R]] standard. A DVD+R is a [[Write Once Read Many|write-once]] optical disc with 4.7 [[gigabyte]]s (GB) of storage, generally used for non-volatile data storage or video applications.


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== History ==
{{R from merge}}
The DVD+R format was developed by a coalition of corporations—now known as the [[DVD+RW Alliance]]—in mid-2002 (though most of the initial advocacy was from [[Sony]]). The DVD+R format competes with the [[DVD-R]] format, which is developed by the [[DVD Forum]]. The DVD Forum initially did not approve of the DVD+R format and claimed that the DVD+R format was not an official DVD format until January 25, 2008.<ref name="dvd6cla.com">{{cite web | publisher = DVD6C LA | url = http://www.dvd6cla.com/news_20080125.html|title= DVD6C Announces New Licensing Program |accessdate = 2008-01-25}}</ref>
{{R to section}}

{{R from subtopic}}
In October 2003, it was demonstrated that [[Dual layer recording|double layer]] technology could be used with a DVD+R disc to nearly double the capacity to [[DVD+R DL|8.5 GB]] per disc. Manufacturers have incorporated this technology into commercial devices since mid-2004.{{Citation needed|date=July 2008}}
}}

As of 2007, the recordable DVD market still shows little sign of settling down in favor of either format. Since almost all DVD writers sold today can record to both formats, this is not an issue for most people. When creating DVDs for distribution (where the playing unit is unknown or older), using the DVD-R format is preferable, because most older (up to 2004) standalone DVD video players and DVD ROM drives {{cn span| text=cannot read discs in the later DVD+R format.| reason =It is only the DVD+RW that could not be read in the deliberately crippled players | date = May 2013}}<ref>{{cite web|url=http://www.videohelp.com/dvd|title =
What is DVD?|accessdate=2008-07-23}}</ref>{{Not in citation|date=May 2013}}

On 25 January 2008, [[DVD6C]] officially accepted DVD+R and DVD+RW by adding them to its list of licensable DVD products.<ref name="dvd6cla.com" />

== Technical details ==
DVD+R discs carry up to 8.5 [[gigabyte|GB]] of data, approximately the same as [[DVD-R]].<ref>{{cite web |url=http://www.osta.org/technology/dvdqa/dvdqa6.htm |title=Understanding DVD |accessdate=2008-09-06 |publisher=[[Optical Storage Technology Association]] |year=2004 }}</ref> Unlike [[DVD+RW]] discs, DVD+R discs can only be written to once. Because of this, DVD+R discs are suited to applications such as non-volatile data storage, audio, or video. This can cause confusion because the DVD+RW Alliance logo is a stylized 'RW'. Thus, a DVD+R disc may have the RW logo, but it is not rewritable.

DVD+R discs must be formatted before being recorded by a compatible DVD video recorder. DVD-R do not have to be formatted before being recorded by a compatible DVD video recorder. This is because the two variants of the discs are written in different formats (See [[DVD+VR]] and [[DVD-VR]] respectively).

The DVD+R format is divergent from the DVD-R format. Hybrid drives that can handle both, often labeled '[[DVD±R|DVD±RW]]', are very popular since there is not a single standard for recordable DVDs. There are a number of significant technical differences between the 'dash' and the 'plus' format, although most users would not notice the difference. One example is that the DVD+R style [[Wobble frequency|Address In Pregroove]] (ADIP) system of tracking and speed control is less susceptible to interference and error, which makes the ADIP system more accurate at higher speeds than the [[Wobble frequency|Land Pre Pit]] (LPP) system used by DVD-R. In addition, DVD+R(W) has a more robust error management system than DVD-R(W), allowing for more accurate burning to media, independent of the quality of the media. The practical upshot is that a DVD+R writer is able to locate data on the disc to byte accuracy whereas DVD-R is incapable of such precision.

Additional session linking methods are more accurate with DVD+R(W) versus DVD-R(W), resulting in fewer damaged or unusable discs due to buffer under-run and multi-session discs with fewer PI/PO errors.<ref>[http://adterrasperaspera.com/blog/2006/10/30/how-to-choose-cddvd-archival-media/ How To Choose CD/DVD Archival Media, Patrick McFarland, adterrasperaspera.com, October 30th, 2006]</ref>

Like other 'plus' media, it is possible to change the [[book type]] to increase the compatibility of DVD+R media (though unlike DVD+RW, it is a one way process). This is also known as bitsetting.<ref>{{cite web|url=http://www.cdfreaks.com/reviews/Increased-compatibility-DVD-bitsetting/|title=Increased compatibility: DVD bitsetting |accessdate=2008-09-15}}</ref>{{broken link|date=May 2013}}{{cn|date=May 2013}}

== Recordable DVD capacity comparison ==
For comparison, the table below shows storage capacities of the four most common DVD recordable media, excluding [[DVD-RAM]]. SL stands for standard single-layer discs, while DL denotes the double-layer variants. See articles on the formats in question for information on compatibility issues.

{{DVD capacities}}

== See also ==
* [[DVD]]
* [[DVD recorder]] (DVDR)
* [[DVD-R DL]]
* [[CD-R]]
* [[DVD+R DL]]
* [[DVD-RW]]
* [[DVD+RW]]
* [[DVD+RW DL]]
* [[DVD-RAM]]
* [[MiniDVD]]
* [[MultiLevel Recording]], an obsolete technology (with non-binary modulation)
* [[Blu-ray Disc]]
* [[Blu-ray Disc recordable]]

==References==
{{Reflist |64em}}

==External links==
* {{Citation | url = http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=40169 | publisher = ISO/IEC | id = 17344 | year = 2005 | title = Data interchange on 120 mm and 80 mm Optical Disc using +R format | type = technical specification}}.
* {{Citation | url = http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=51140 | publisher = ISO/IEC | id = 25434 | year = 2008 | title = Data interchange on 120 mm and 80 mm optical disc using +R DL format – Capacity: 8.55 GB and 2.66 GB per side (recording speed up to 16×) | type = technical specification}}.
* [http://www.dvdrw.com/information/white-papers.htm Official white papers]
* {{Citation | url = http://www.dvddemystified.com/dvdfaq.html | title = What's the difference between DVD-R and DVD+R? | publisher = DVD demystified}}.
* [http://www.cdfreaks.com/reviews/Why-DVDRW-is-superior-to-DVD-RW Why DVD+R(W) is superior to DVD-R(W)] (opinion piece)

{{DEFAULTSORT:Dvd R}}
[[Category:DVD]]
[[Category:Audio storage]]
[[Category:Video storage]]

[[ja:DVD#DVD+R]]
[[ru:DVD#Форматы DVD-R и DVD+R]]

Latest revision as of 15:22, 10 June 2020

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