DVD+R

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Optical disc authoring

Optical disc Optical disc drive Optical disc authoring Authoring software Recording technologies Recording modes Packet writing
Optical media types
Blu-ray Disc (BD): BD-R, BD-RE DVD: DVD-R, DVD+R, DVD-R DL, DVD+R DL, DVD-RW, DVD+RW, DVD-RW DL, DVD+RW DL, DVD-RW2, DVD-RAM, DVD-D, HVD Compact Disc (CD): Red Book, CD-ROM, CD-R, CD-RW, 5.1 Music Disc, SACD, PhotoCD, CD Video (CDV), Video CD (VCD), SVCD, CD+G, CD-Text, CD-ROM XA, CD-i Universal Media Disc (UMD) Enhanced Versatile Disc (EVD) Forward Versatile Disc (FVD) Holographic Versatile Disc (HVD) HD DVD: HD DVD-R, HD DVD-RW, HD DVD-RAM High-Definition Versatile Disc (HDVD) High definition Versatile Multilayer Disc (HD VMD) VCDHD GD-ROM MiniDisc (MD) (Hi-MD) Laserdisc (LD) Video Single Disc (VSD) Ultra Density Optical (UDO) Stacked Volumetric Optical Disk (SVOD) Five dimensional discs (5D DVD)
Standards
Rainbow Books File systems ISO 9660 Joliet Rock Ridge El Torito Apple ISO 9660 Extensions Universal Disk Format (UDF) Mount Rainier
Further reading
History of optical storage media High definition optical disc format war
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A DVD+R is a write-once optical disc with 4.7 GB or 4.377 GiB (DVD-R has 4.382 GiB) of storage capacity (more precisely, 2295104 sectors of 2048 bytes each^[1]). The format was developed by a coalition of corporations --now known as the DVD+RW Alliance-- in mid 2002 (though most initial advocacy was from Sony). Since the DVD+R format is a competing format to the DVD-R format, which is developed by the DVD Forum, it had not been approved by the DVD Forum, which claimed that the DVD+R format was not an official DVD format until January 25, 2008.^[2]

In October 2003, it was demonstrated that double layer technology could be used with a DVD+R disc to nearly double the capacity to '8.5 GB' per disc. Manufacturers have incorporated this technology into commercial devices since mid-2004 (see DVD+R DL).^{[citations needed]}

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 nonvolatile data storage, audio, or video. This can cause confusion because the DVD+RW Alliance logo is a stylized "RW". Thus, a DVD+R disc can have the RW logo, but it is not rewritable.

The DVD+R format is divergent from the DVD-R format. Hybrid drives that can handle both, often labeled "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" (it's not a minus symbol) and the "plus" format, although most users would not notice the difference. One example is the DVD+R style ADIP (ADdress In Pregroove) system of tracking and speed control being less susceptible to interference and error which makes the ADIP system more accurate at higher speeds than the LPP (Land Pre Pit) 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. 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 disks with fewer PI/PO errors.^[3]

Like other "plus" media, it is possible to change the book type to increase the compatibility of DVD+R media. This is also known as bitsetting.^[4]

As of 2007, the market for recordable DVD technology shows little sign of settling down in favor of either the "dash" or "plus" formats, which is mostly the result of the increasing numbers of dual-format devices that can record to both formats; it has become very difficult to find new devices that can only record to one of the formats. However, because the DVD-R format has been in use since 1997, it has had a five-year lead on DVD+R. As such, older or cheaper DVD players (up to 2004 vintage) are more likely to favor the DVD-R standard exclusively^[5], and when creating DVDs for distribution (where the playing unit is unknown or older) the DVD-R format would normally be preferable.

On 2008-01-25, DVD6C officially accepted DVD+R and DVD+RW by adding them to its list of licensable DVD products.^[2]

Contents 1 Recordable DVD capacity comparison 2 Speed 3 See also 4 References 5 External links 5.1 tags

[edit] 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 capacity

Disk Type	Data sectors (2,048 B each)	Capacity
		bytes	GB	GiB
DVD-R (SL)	2,298,496	4,707,319,808	4.7	4.384
DVD+R (SL)	2,295,104	4,700,372,992	4.7	4.378
DVD-R DL	4,171,712	8,543,666,176	8.5	7.957
DVD+R DL	4,173,824	8,547,991,552	8.5	7.961
SL / DL – Single/Dual layer

[edit] Speed

Drive speed	Data rate	Write time for Single Layer DVD+R
1X	1.32 MB/s	60 minutes
2X	2.64 MB/s	30 minutes
4X	5.28 MB/s	15 minutes
8X	10.56 MB/s	7.5 minutes
16X	21.12 MB/s	3.75 minutes

[edit] See also

[edit] References

[edit] External links

• Official white papers
• What's the difference between DVD-R and DVD+R? (dvd demystified)
• Why DVD+R(W) is superior to DVD-R(W) (opinion piece)

[edit] tags

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