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programs watched using DVD players. DVDs offer higher storage capacity than compact discs while having the same dimensions. Prerecorded DVDs are mass-produced

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For other uses, see DVD (disambiguation). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (September 2014) (Learn how and when to remove this template message) DVD
The data side of a Sony DADC–manufactured DVDMedia type Optical discEncoding DVD-ROM and DVD-R(W) use one encoding, DVD-RAM and DVD+R(W) uses anotherCapacity 4.7 GB (single-sided, single-layer – common)
8.5 GB (single-sided, double-layer)
9.4 GB (double-sided, single-layer)
17.08 GB (double-sided, double-layer)Read mechanism 650 nm laser, 10.5 Mbit/s (1×)Write mechanism 650 nm laser with a focused beam using more power than for reading, 10.5 Mbit/s (1×)Standard DVD Forum's DVD Books[1][2][3] and DVD+RW Alliance specificationsDeveloped by Philips, SonyDimensions Diameter: 120 mm (4.7 in)
Thickness: 1.2 mm (0.047 in)Weight 16 grams (0.56 oz)Extended from LaserDisc
Compact discExtended to DVD+RW, DVD-RAM (Fixed-track writable media)
Blu-ray DiscReleased November 1996; 21 years ago (1996-11) (Japan)
January 1997 (1997-01) (CIS and other Asia)
March 1998 (1998-03) (Europe)
April 1997 (1997-04) (United States)[4]
February 1999 (1999-02) (Australia) Optical discs General
  • Optical disc
  • Optical disc drive
  • Optical disc authoring
  • Authoring software
  • Recording technologies
    • Recording modes
    • Packet writing
Optical media types
  • Compact disc (CD): CD-DA, CD-ROM, CD-R, CD-RW, 5.1 Music Disc, Super Audio CD (SACD), Photo CD, CD Video (CDV), Video CD (VCD), Super Video CD (SVCD), CD+G, CD-Text, CD-ROM XA, CD-i
  • Blu-ray Disc (BD): BD-R & BD-RE, Blu-ray 3D
  • Ultra HD Blu-ray
  • Universal Media Disc (UMD)
  • Enhanced Versatile Disc (EVD)
  • Forward Versatile Disc (FVD)
  • Holographic Versatile Disc (HVD)
  • China Blue High-definition Disc (CBHD)
  • High-Definition Versatile Multilayer Disc (HD VMD)
  • GD-ROM
  • Personal Video Disc (PVD)
  • MiniDisc (MD), Hi-MD
  • LaserDisc (LD), LD-ROM, LV-ROM
  • Video Single Disc (VSD)
  • Ultra Density Optical (UDO)
  • Stacked Volumetric Optical Disk (SVOD)
  • Five dimensional disc (5D DVD)
  • Nintendo optical disc (NOD)
  • Archival Disc
  • Professional Disc
    • Mount Rainier (packet writing)
    • Mount Fuji (layer jump recording)
  • Rainbow Books
  • File systems
    • ISO 9660
      • Joliet
      • Romeo
      • Rock Ridge / SUSP
      • El Torito
      • Apple ISO 9660 Extensions
    • Universal Disk Format (UDF)
    • ISO 13490
See also
  • History of optical storage media
  • High-definition optical disc format war
  • v
  • t
  • e

DVD (an abbreviation of "digital video disc"[5] or "digital versatile disc")[6][7] is a digital optical disc storage format invented and developed by Philips and Sony in 1995. The medium can store any kind of digital data and is widely used for software and other computer files as well as video programs watched using DVD players. DVDs offer higher storage capacity than compact discs while having the same dimensions.

Prerecorded DVDs are mass-produced using molding machines that physically stamp data onto the DVD. Such discs are a form of DVD-ROM because data can only be read and not written or erased. Blank recordable DVD discs (DVD-R and DVD+R) can be recorded once using a DVD recorder and then function as a DVD-ROM. Rewritable DVDs (DVD-RW, DVD+RW, and DVD-RAM) can be recorded and erased many times.

DVDs are used in DVD-Video consumer digital video format and in DVD-Audio consumer digital audio format as well as for authoring DVD discs written in a special AVCHD format to hold high definition material (often in conjunction with AVCHD format camcorders). DVDs containing other types of information may be referred to as DVD data discs.

  • 1 Etymology
  • 2 History
    • 2.1 Development
    • 2.2 Adoption
  • 3 Specifications
  • 4 DVD recordable and rewritable
    • 4.1 Dual-layer recording
  • 5 Capacity
  • 6 DVD drives and players
    • 6.1 Laser and optics
    • 6.2 Transfer rates
  • 7 DVD-Video
    • 7.1 Security
    • 7.2 Consumer restrictions
  • 8 DVD-Audio
    • 8.1 Security
  • 9 Successors and decline
  • 10 Longevity
  • 11 See also
  • 12 References
  • 13 Further reading
  • 14 External links

The Oxford English Dictionary comments that, "In 1995 rival manufacturers of the product initially named digital video disc agreed that, in order to emphasize the flexibility of the format for multimedia applications, the preferred abbreviation DVD would be understood to denote digital versatile disc." The OED also states that in 1995, "The companies said the official name of the format will simply be DVD. Toshiba had been using the name ‘digital video disc’, but that was switched to ‘digital versatile disc’ after computer companies complained that it left out their applications."[8]

"Digital versatile disc" is the explanation provided in a DVD Forum Primer from 2000[9] and in the DVD Forum's mission statement.[10]

History Development Comparison of several forms of disk storage showing tracks (tracks not to scale); green denotes start and red denotes end.
* Some CD-R(W) and DVD-R(W)/DVD+R(W) recorders operate in ZCLV, CAA or CAV modes, but most work in Constant linear velocity (CLV) mode.

There were several formats developed for recording video on optical discs before the DVD. Optical recording technology was invented by David Paul Gregg and James Russell in 1958 and first patented in 1961. A consumer optical disc data format known as LaserDisc was developed in the United States, and first came to market in Atlanta, Georgia in 1978. It used much larger discs than the later formats. Due to the high cost of players and discs, consumer adoption of LaserDisc was very low in both North America and Europe, and was not widely used anywhere outside Japan and the more affluent areas of Southeast Asia, such as Hong-Kong, Singapore, Malaysia and Taiwan.

CD Video released in 1987 used analog video encoding on optical discs matching the established standard 120 mm (4.7 in) size of audio CDs. Video CD (VCD) became one of the first formats for distributing digitally encoded films in this format, in 1993.[11] In the same year, two new optical disc storage formats were being developed. One was the Multimedia Compact Disc (MMCD), backed by Philips and Sony, and the other was the Super Density (SD) disc, supported by Toshiba, Time Warner, Matsushita Electric, Hitachi, Mitsubishi Electric, Pioneer, Thomson, and JVC. By the time of the press launches for both formats in January 1995, the MMCD nomenclature had been dropped, and Philips and Sony were referring to their format as Digital Video Disc (DVD).[12][13]

Representatives from the SD camp asked IBM for advice on the file system to use for their disc, and sought support for their format for storing computer data. Alan E. Bell, a researcher from IBM's Almaden Research Center, got that request, and also learned of the MMCD development project. Wary of being caught in a repeat of the costly videotape format war between VHS and Betamax in the 1980s, he convened a group of computer industry experts, including representatives from Apple, Microsoft, Sun Microsystems, Dell, and many others. This group was referred to as the Technical Working Group, or TWG.

On August 14, 1995, an ad hoc group formed from five computer companies (IBM, Apple, Compaq, Hewlett-Packard, and Microsoft) issued a press release stating that they would only accept a single format.[14] The TWG voted to boycott both formats unless the two camps agreed on a single, converged standard. They recruited Lou Gerstner, president of IBM, to pressure the executives of the warring factions. In one significant compromise, the MMCD and SD groups agreed to adopt proposal SD 9, which specified that both layers of the dual-layered disc be read from the same side—instead of proposal SD 10, which would have created a two-sided disc that users would have to turn over.[15] As a result, the DVD specification provided a storage capacity of 4.7 GB for a single-layered, single-sided disc and 8.5 GB for a dual-layered, single-sided disc.[15] The DVD specification ended up similar to Toshiba and Matsushita's Super Density Disc, except for the dual-layer option (MMCD was single-sided and optionally dual-layer, whereas SD was two half-thickness, single-layer discs which were pressed separately and then glued together to form a double-sided disc[13]) and EFMPlus modulation designed by Kees Schouhamer Immink.

Philips and Sony decided that it was in their best interests to end the format war, and agreed to unify with companies backing the Super Density Disc to release a single format, with technologies from both. After other compromises between MMCD and SD, the computer companies through TWG won the day, and a single format was agreed upon. The TWG also collaborated with the Optical Storage Technology Association (OSTA) on the use of their implementation of the ISO-13346 file system (known as Universal Disk Format) for use on the new DVDs.


Movie and home entertainment distributors adopted the DVD format to replace the ubiquitous VHS tape as the primary consumer digital video distribution format.[16] They embraced DVD because it produces superior moving pictures and sound, provides superior data lifespan, and can be interactive.[citation needed] Interactivity on LaserDiscs had proven desirable to consumers, especially collectors. When LaserDisc prices dropped from approximately $100 per disc to $20 per disc at retail, this luxury feature became available for mass consumption. Simultaneously, the movie studios decided to change their home entertainment release model from a rental model to a for purchase model,[citation needed] and large numbers of DVDs were sold.

At the same time, a demand for interactive design talent and services was created. Movies in the past had uniquely designed title sequences. Suddenly every movie being released required information architecture and interactive design components that matched the film's tone and were at the quality level that Hollywood demanded for its product.

DVD as a format had two qualities at the time that were not available in any other interactive medium: enough capacity and speed to provide high quality, full motion video and sound, and low cost delivery mechanism provided by consumer products retailers. Retailers would quickly move to sell their players for under $200, and eventually for under $50 at retail. In addition, the medium itself was small enough and light enough to mail using general first class postage. Almost overnight, this created a new business opportunity and model for business innovators to re-invent the home entertainment distribution model. It also gave companies an inexpensive way to provide business and product information on full motion video through direct mail.

Immediately following the formal adoption of a unified standard for DVD, two of the four leading video game console companies (Sega and The 3DO Company) said they already had plans to design a gaming console with DVDs as the source medium.[17] (Sony, despite being one of the developers of the DVD format and eventually the first company to actually release a DVD-based console, stated at the time that they had no plans to use DVD in their gaming systems.[17]) Game consoles such as the PlayStation 2, Xbox, and Xbox 360 use DVDs as their source medium for games and other software. Contemporary games for Windows were also distributed on DVD.


The DVD specifications created and updated by the DVD Forum are published as so-called DVD Books (e.g. DVD-ROM Book, DVD-Audio Book, DVD-Video Book, DVD-R Book, DVD-RW Book, DVD-RAM Book, DVD-AR Book, DVD-VR Book, etc.).[1][2][3]

Some specifications for mechanical, physical and optical characteristics of DVD optical discs can be downloaded as freely available standards from the ISO website.[18] There are also equivalent European Computer Manufacturers Association (Ecma) standards for some of these specifications, such as Ecma-267 for DVD-ROMs.[19] Also, the DVD+RW Alliance publishes competing recordable DVD specifications such as DVD+R, DVD+R DL, DVD+RW or DVD+RW DL. These DVD formats are also ISO standards.[20][21][22][23]

Some DVD specifications (e.g. for DVD-Video) are not publicly available and can be obtained only from the DVD Format/Logo Licensing Corporation for a fee of US $5000.[24][25] Every subscriber must sign a non-disclosure agreement as certain information in the DVD Book is proprietary and confidential.[24]

DVD recordable and rewritable Main article: DVD recordable A DVD burner drive for a PC

HP initially developed recordable DVD media from the need to store data for backup and transport.[26] DVD recordables are now also used for consumer audio and video recording. Three formats were developed: DVD-R/RW, DVD+R/RW (plus), and DVD-RAM. DVD-R is available in two formats, General (650 nm) and Authoring (635 nm), where Authoring discs may be recorded with CSS encrypted video content but General discs may not.[27]

Although most DVD writers can nowadays write the DVD+R/RW and DVD-R/RW formats (usually denoted by "DVD±RW" or the existence of both the DVD Forum logo and the DVD+RW Alliance logo), the "plus" and the "dash" formats use different writing specifications. Most DVD readers and players play both kinds of discs, though older models can have trouble with the "plus" variants.

Some first generation DVD players would cause damage to DVD±R/RW/DL when attempting to read them.[citation needed]

The form of the spiral groove that makes up the structure of a recordable DVD encodes unalterable identification data known as Media Identification Code (MID). The MID contains data such as the manufacturer and model, byte capacity, allowed data rates (also known as speed), etc..[citation needed]

Dual-layer recording Sony Rewritable DVD

Dual-layer recording (sometimes also known as double-layer recording) allows DVD-R and DVD+R discs to store significantly more data—up to 8.5 gigabytes per disc, compared with 4.7 gigabytes for single-layer discs.[28] Along with this, DVD-DLs have slower write speeds as compared to ordinary DVDs. When played, a slight transition can sometimes be seen in the playback when the player changes layers. DVD-R DL was developed for the DVD Forum by Pioneer Corporation; DVD+R DL was developed for the DVD+RW Alliance by Mitsubishi Kagaku Media (MKM) and Philips.[29]

A dual-layer disc differs from its single layered counterpart by employing a second physical layer within the disc itself. The drive with dual-layer capability accesses the second layer by shining the laser through the first semitransparent layer. In some DVD players, the layer change can exhibit a noticeable pause, up to several seconds.[30] This caused some viewers to worry that their dual-layer discs were damaged or defective, with the end result that studios began listing a standard message explaining the dual-layer pausing effect on all dual-layer disc packaging.

DVD recordable discs supporting this technology are backward-compatible with some existing DVD players and DVD-ROM drives.[29] Many current DVD recorders support dual-layer technology, and the price is now comparable to that of single-layer drives, although the blank media remain more expensive. The recording speeds reached by dual-layer media are still well below those of single-layer media.

Dual layer DVDs are recorded using Opposite Track Path (OTP).[31] DVD-ROM discs mastered for computer use are produced with track 0 starting at the inside diameter (as is the case with a single layer). Track 1 then starts at the outside diameter. DVD video discs are mastered slightly differently. The video is divided between the layers such that layer 1 can be made to start at the same diameter that layer 0 finishes. This speeds up the transition as the layer changes because although the laser does have to refocus on layer 1, it does not have to skip across the disc to find it.


The basic types of DVD (12 cm diameter, single-sided or homogeneous double-sided) are referred to by a rough approximation of their capacity in gigabytes. In draft versions of the specification, DVD-5 indeed held five gigabytes, but some parameters were changed later on as explained above, so the capacity decreased. Other formats, those with 8 cm diameter and hybrid variants, acquired similar numeric names with even larger deviation.

The 12 cm type is a standard DVD, and the 8 cm variety is known as a MiniDVD. These are the same sizes as a standard CD and a mini-CD, respectively. The capacity by surface area (MiB/cm2) varies from 6.92 MiB/cm2 in the DVD-1 to 18.0 MB/cm2 in the DVD-18.[clarification needed]

Each DVD sector contains 2,418 bytes of data, 2,048 bytes of which are user data. There is a small difference in storage space between + and - (hyphen) formats:

Scan of a DVD-R; the "a" portion has been recorded on while the "b" portion has not Capacity and nomenclature[32][33]
SS = single-sided, DS = double-sided, SL = single-layer, DL = dual-layer Designation Sides Layers
(total) Diameter
(cm) Capacity (GiB) DVD-1[34] SS SL 1 1 8 1.36 DVD-2 SS DL 1 2 8 2.47 DVD-3 DS SL 2 2 8 2.72 DVD-4 DS DL 2 4 8 4.95 DVD-5 SS SL 1 1 12 4.37 DVD-9 SS DL 1 2 12 7.95 DVD-10 DS SL 2 2 12 8.75 DVD-14[35] DS SL+DL 2 3 12 12.33 DVD-18 DS DL 2 4 12 15.90 Note: All sizes are expressed in their binary sense (i.e. 1 Gigabyte = 1,073,741,824 bytes). Size comparison: a 12 cm DVD+RW and a 19 cm pencil DVD-RW Drive operating with the protective cover removed. Capacity and nomenclature of (re)writable discs Designation Sides Layers
(total) Diameter
(cm) Capacity (GiB) DVD-R SS SL (1.0) 1 1 12 3.68 DVD-R SS SL (2.0) 1 1 12 4.37 DVD-RW SS SL 1 1 12 4.37 DVD+R SS SL 1 1 12 4.37 DVD+RW SS SL 1 1 12 4.37 DVD-R SS DL 1 2 12 7.96 DVD-RW SS DL 1 2 12 7.96 DVD+R SS DL 1 2 12 7.96 DVD+RW SS DL 1 2 12 7.96 DVD-RAM SS SL 1 1 8 1.36* DVD-RAM DS SL 2 1 8 2.47* DVD-RAM SS SL (1.0) 1 1 12 2.40 DVD-RAM SS SL (2.0) 1 1 12 4.37 DVD-RAM DS SL (1.0) 2 1 12 4.80 DVD-RAM DS SL (2.0) 2 1 12 8.75* Note: All sizes are expressed in their binary sense (i.e. 1 Gigabyte = 1,073,741,824 bytes). Capacity differences of writable DVD formats Type Sectors Bytes KiB MiB GiB DVD-R SL 2,298,496 4,707,319,808 4,596,992 4,489.250 4.384 DVD+R SL 2,295,104 4,700,372,992 4,590,208 4,482.625 4.378 DVD-R DL 4,171,712 8,543,666,176 8,343,424 8,147.875 7.957 DVD+R DL 4,173,824 8,547,991,552 8,347,648 8,152.000 7.961 All sizes are expressed in their binary sense (i.e. 1 Gigabyte = 1,073,741,824 bytes etc.). DVD drives and players See also: Optical disc drive and DVD player

DVD drives are devices that can read DVD discs on a computer. DVD players are a particular type of devices that do not require a computer to work, and can read DVD-Video and DVD-Audio discs.

Laser and optics Comparison of various optical storage media

All three common optical disc media (Compact disc, DVD, and Blu-ray) use light from laser diodes, for its spectral purity and ability to be focused precisely. DVD uses light of 650 nm wavelength (red), as opposed to 780 nm (far-red, commonly called infrared) for CD. This shorter wavelength allows a smaller pit on the media surface compared to CDs (0.74 µm for DVD versus 1.6 µm for CD), accounting in part for DVD's increased storage capacity.

In comparison, Blu-ray Disc, the successor to the DVD format, uses a wavelength of 405 nm (violet), and one dual-layer disc has a 50 GB storage capacity.

Transfer rates Internal mechanism of a DVD-ROM Drive. See text for details.

Read and write speeds for the first DVD drives and players were of 1,385 kB/s (1,353 KiB/s); this speed is usually called "1×". More recent models, at 18× or 20×, have 18 or 20 times that speed. Note that for CD drives, 1× means 153.6 kB/s (150 KiB/s), about one-ninth as swift.[34][36]

DVD drive speeds Drive speed Data rate ~Write time (minutes)[37] Mbit/s MB/s Single-Layer Dual-Layer 1× 11 1.4 57 103 2× 22 2.8 28 51 2.4× 27 3.3 24 43 2.6× 29 3.6 22 40 4× 44 5.5 14 26 6× 67 8.3 9 17 8× 89 11.1 7 13 10× 111 13.9 6 10 12× 133 16.6 5 9 16× 177 22.2 4 6 18× 199 24.9 3 6 20× 222 27.7 3 5 22× 244 30.5 3 5 24× 266 33.2 2 4 DVD-Video Main article: DVD-Video

DVD-Video is a standard for distributing video/audio content on DVD media. The format went on sale in Japan in 1995, in the United States, Canada, Central America, and Indonesia in 1997, and in Europe, Asia, Australia, and Africa in 1998. DVD-Video became the dominant form of home video distribution in Japan when it first went on sale in 1995, but it shared the market for home video distribution in the United States until June 15, 2003, when weekly DVD-Video in the United States rentals began outnumbering weekly VHS cassette rentals.[38] DVD-Video is still the dominant form of home video distribution worldwide except for in Japan where it was surpassed by Blu-ray Disc when Blu-ray first went on sale in Japan on March 31, 2006.

Security Main article: Content Scramble System

The Content Scramble System (CSS) is a digital rights management (DRM) and encryption system employed on almost all commercially produced DVD-video discs. CSS utilizes a proprietary 40-bit stream cipher algorithm. The system was introduced around 1996 and was first compromised in 1999.

The purpose of CSS is twofold:

  1. CSS prevents byte-for-byte copies of an MPEG (digital video) stream from being playable since such copies do not include the keys that are hidden on the lead-in area of the restricted DVD.
  2. CSS provides a reason for manufacturers to make their devices compliant with an industry-controlled standard, since CSS scrambled discs cannot in principle be played on noncompliant devices; anyone wishing to build compliant devices must obtain a license, which contains the requirement that the rest of the DRM system (region codes, Macrovision, and user operation prohibition) be implemented.[39]

While most CSS-decrypting software is used to play DVD videos, other pieces of software (such as DVD Decrypter, AnyDVD, DVD43, Smartripper, and DVD Shrink) can copy a DVD to a hard drive and remove Macrovision, CSS encryption, region codes and user operation prohibition.

Consumer restrictions

The rise of filesharing has prompted many copyright holders to display notices on DVD packaging or displayed on screen when the content is played that warn consumers of the illegality of certain uses of the DVD. It is commonplace to include a 90-second advertisement warning that most forms of copying the contents are illegal. Many DVDs prevent skipping past or fast-forwarding through this warning.

Arrangements for renting and lending differ by geography. In the U.S., the right to re-sell, rent, or lend out bought DVDs is protected by the first-sale doctrine under the Copyright Act of 1976. In Europe, rental and lending rights are more limited, under a 1992 European Directive that gives copyright holders broader powers to restrict the commercial renting and public lending of DVD copies of their work.

DVD-Audio Main article: DVD-Audio

DVD-Audio is a format for delivering high fidelity audio content on a DVD. It offers many channel configuration options (from mono to 5.1 surround sound) at various sampling frequencies (up to 24-bits/192 kHz versus CDDA's 16-bits/44.1 kHz). Compared with the CD format, the much higher-capacity DVD format enables the inclusion of considerably more music (with respect to total running time and quantity of songs) or far higher audio quality (reflected by higher sampling rates, greater sample resolution and additional channels for spatial sound reproduction).

DVD-Audio briefly formed a niche market, probably due to the very sort of format war with rival standard SACD that DVD-Video avoided.

Security Main article: Content Protection for Recordable Media

DVD-Audio discs employ a DRM mechanism, called Content Protection for Prerecorded Media (CPPM), developed by the 4C group (IBM, Intel, Matsushita, and Toshiba).

Although CPPM was supposed to be much harder to crack than a DVD-Video CSS, it too was eventually cracked, in 2007, with the release of the dvdcpxm tool. The subsequent release of the libdvdcpxm library (based on dvdcpxm) allowed for the development of open source DVD-Audio players and ripping software. As a result, making 1:1 copies of DVD-Audio discs is now possible with relative ease, much like DVD-Video discs.

Successors and decline This article needs to be updated. Please update this article to reflect recent events or newly available information. (February 2018)

In 2006, two new formats called HD DVD and Blu-ray Disc were released as the successor to DVD. HD DVD competed unsuccessfully with Blu-ray Disc in the format war of 2006–2008. A dual layer HD DVD can store up to 30 GB and a dual layer Blu-ray disc can hold up to 50 GB.[40][41]

However, unlike previous format changes, e.g., vinyl to Compact Disc or VHS videotape to DVD, there is no immediate indication that production of the standard DVD will gradually wind down, as they still dominate, with around 75% of video sales and approximately one billion DVD player sales worldwide as of 3 April 2011. In fact, experts claim that the DVD will remain the dominant medium for at least another five years as Blu-ray technology is still in its introductory phase, write and read speeds being poor and necessary hardware being expensive and not readily available.[42][43]

Consumers initially were also slow to adopt Blu-ray due to the cost.[44] By 2009, 85% of stores were selling Blu-ray Discs. A high-definition television and appropriate connection cables are also required to take advantage of Blu-ray disc. Some analysts suggest that the biggest obstacle to replacing DVD is due to its installed base; a large majority of consumers are satisfied with DVDs.[45] The DVD succeeded because it offered a compelling alternative to VHS. In addition, the uniform media size let manufacturers make Blu-ray players and now defunct format HD DVD players backward-compatible, so they can play older DVDs. This stands in contrast to the change from vinyl to CD, and from tape to DVD, which involved a complete change in physical medium. As of 2012[update] it is still commonplace for studios to issue major releases in "combo pack" format, including both a DVD and a Blu-ray disc (as well as, in many cases, a third disc with an authorized digital copy). Also, some multi-disc sets use Blu-ray for the main feature, but DVDs for supplementary features (examples of this include the Harry Potter "Ultimate Edition" collections, the 2009 re-release of the 1967 The Prisoner TV series, and a 2007 collection related to Blade Runner). Another reason cited (July 2011) for the slower transition to Blu-ray from DVD is the necessity of and confusion over "firmware updates" and needing an internet connection to perform updates.

This situation is similar to the changeover from 78 rpm shellac recordings to 45 rpm and 33⅓ rpm vinyl recordings. Because the new and old mediums were virtually the same (a disc on a turntable, played by a needle), phonograph player manufacturers continued to include the ability to play 78s for decades after the format was discontinued.

Manufacturers continue to release standard DVD titles as of 2018[update], and the format remains the preferred one for the release of older television programs and films. Some programs, such as Star Trek: The Original Series and Star Trek: The Next Generation must be re-scanned to produce a high definition version from the original film recordings. (Certain special effects were also updated to appear better in high-definition.)[46]

DVDs are also facing competition from video on demand services.[47][48][49][50] With increasing numbers of homes having high speed Internet connections, many people now have the option to either rent or buy video from an online service, and view it by streaming it directly from that service's servers, meaning that the customer need not have any form of permanent storage media for video at all. PWC predicts that online streaming revenue will overtake physical media sales revenue by 2018. Globally, the total combined revenue from over-the-top (OTT)/streaming services and broadcasters' video on demand (VOD) services is expected to grow at a CAGR of 19.9% to overtake physical home video revenue (the sale and rental of DVDs and Blu-ray discs) in 2018.[51] By 2017, digital streaming services had overtaken the sales of DVDs and Blu-rays for the first time. [52]


DVD longevity is measured by how long the data remains readable from the disc, assuming compatible devices exist that can read it: that is, how long the disc can be stored until data is lost. Numerous factors affect longevity: composition and quality of the media (recording and substrate layers), humidity and light storage conditions, the quality of the initial recording (which is sometimes a matter of mutual compatibility of media and recorder), etc.[53] According to NIST, " temperature of 64.4 °F (18 °C) and 40% RH would be considered suitable for long-term storage. A lower temperature and RH is recommended for extended-term storage."[54]

According to the Optical Storage Technology Association (OSTA), "Manufacturers claim lifespans ranging from 30 to 100 years for DVD, DVD-R and DVD+R discs and up to 30 years for DVD-RW, DVD+RW and DVD-RAM."[55]

According to a NIST/LoC research project conducted in 2005–2007 using accelerated life testing, "There were fifteen DVD products tested, including five DVD-R, five DVD+R, two DVD-RW and three DVD+RW types. There were ninety samples tested for each product. Overall, seven of the products tested had estimated life expectancies in ambient conditions of more than 45 years. Four products had estimated life expectancies of 30–45 years in ambient storage conditions. Two products had an estimated life expectancy of 15–30 years and two products had estimated life expectancies of less than 15 years when stored in ambient conditions." The life expectancies for 95% survival estimated in this project by type of product are tabulated below:[53][dubious – discuss]

Disc type 0–15 years 15–30 years 30–45 years over 45 years DVD-R 20% 20% 0% 60% DVD+R 20% 0% 40% 40% DVD-RW 0% 0% 50% 50% DVD+RW 0% 33.3% 33.3% 33.3% 10 20 30 40 50 60 70 80 90 100 DVD-R DVD+R DVD-RW DVD+RW
  •   0–15 years
  •   15–30 years
  •   30–45 years
  •   over 45 years
See also
  • List of computer hardware
  • Book type
  • Digital video recorder
  • Disk-drive performance characteristics
  • DVD authoring
  • DVD ripper
  • DVD region code
  • DVD TV game - Interactive movie
  • Professional disc
  • DVD single
  1. ^ a b "DVD FLLC - DVD Format Book". Dvdfllc.co.jp. Retrieved 28 October 2017. 
  2. ^ a b "DVD FLLC - DVD Format Book". Dvdfllc.co.jp. Retrieved 28 October 2017. 
  3. ^ a b "BOOKS OVERVIEW". Mpeg.org. Retrieved 28 October 2017. 
  4. ^ Johnson, Lawrence B. (September 7, 1997). "For the DVD, Disney Magic May Be the Key". The New York Times. Retrieved 2009-05-25. 
  5. ^ "DVD". Dictionary.com. Retrieved 14 August 2015. 
  6. ^ Popular Mechanics, June 1997, p. 69;
  7. ^ Jim Taylor, DVD demystified, McGraw Hill, 1998, 1st edition, p. 405
  8. ^ Oxford English Dictionary, DVD.
  9. ^ "DVD Primer". DVD Forum. September 6, 2000. Retrieved 2013-12-14. 
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  21. ^ ISO ISO/IEC 25434:2008, Data interchange on 120 mm and 80 mm optical disc using +R DL format – Capacity: 8,55 Gbytes and 2,66 Gbytes per side (recording speed up to 16X), Retrieved on 2009-07-26
  22. ^ ISO ISO/IEC 17341:2009, Data interchange on 120 mm and 80 mm optical disc using +RW format – Capacity: 4,7 Gbytes and 1,46 Gbytes per side (recording speed up to 4X), Retrieved on 2009-07-26
  23. ^ ISO ISO/IEC 26925:2009, Data interchange on 120 mm and 80 mm optical disc using +RW HS format – Capacity: 4,7 Gbytes and 1,46 Gbytes per side (recording speed 8X), Retrieved on 2009-07-26
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  37. ^ The write time is wildly optimistic for higher (>4x) write speeds, due to being calculated from the maximum drive write speed instead of the average drive write speed.[citation needed]
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  39. ^ IEEE - Copy Protection for DVD Video p.2 Archived March 18, 2009, at the Wayback Machine.
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  49. ^ Romano, Nick. "Is the DVD Becoming Obsolete?". ScreenCrush. Retrieved 30 December 2016. 
  50. ^ "DVD Going The Way Of VHS In 2016 - CINEMABLEND". Cinemablend.com. 6 June 2014. Retrieved 30 December 2016. 
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  52. ^ Sweney, Mark (5 January 2017). "Film and TV streaming and downloads overtake DVD sales for first time". Theguardian.com. Retrieved 28 October 2017. 
  53. ^ a b Final Report: NIST/Library of Congress (LC) Optical Disc Longevity Study, Loc.gov, September 2007 (table derived from figure 7)
  54. ^ Chang, Wo (2007-08-21). "NIST Digital Media Group: docs/disccare". National Institute of Standards and Technology. Retrieved 2013-12-18. 
  55. ^ "Understanding DVD - Disc Longevity". Osta.org. Retrieved 28 October 2017. 
Further reading .mw-parser-output .refbegin{font-size:90%;margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{list-style-type:none;margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li,.mw-parser-output .refbegin-hanging-indents>dl>dd{margin-left:0;padding-left:3.2em;text-indent:-3.2em;list-style:none}.mw-parser-output .refbegin-100{font-size:100%}
  • Bennett, Hugh (April 2004). "Understanding Recordable and Rewritable DVD". Optical Storage Technology Association. Retrieved 2006-12-17. 
  • Labarge, Ralph (2001). DVD Authoring and Production. Gilroy, California: CMP Books. ISBN 1-57820-082-2. 
  • Taylor, Jim (2000). DVD Demystified (2nd ed.). New York: McGraw-Hill Professional. ISBN 0-07-135026-8. 
External links Wikibooks has a book on the topic of: Inside DVD-Video/MPEG Format
  • All About Converting From Several Video Formats To DVD at Wikibooks
  • DVD at Curlie (based on DMOZ)
  • Dvddemystified.com: DVD Frequently Asked Questions and Answers
  • Dual Layer Explained – Informational Guide to the Dual Layer Recording Process
  • YouTube "DVD Gallery": 1997 Toshiba DVD demo disc (segment) — an in-store Toshiba demonstration disc with technical information on the "then-new" DVD format.
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See also
  • HD DVD
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Video storage formatsVideotapeAnalog
  • Quadruplex (1956)
  • VERA (1958)
  • Ampex 2 inch helical VTR (1961)
  • Sony 2 inch helical VTR (1961)
  • Type A (1965)
  • CV-2000 (1965)
  • Akai (1967)
  • U-matic (1969)
  • EIAJ-1 (1969)
  • Cartrivision (1972)
  • Philips VCR (1972)
  • V-Cord (1974)
  • VX (1974)
  • Betamax (1975)
  • IVC (1975)
  • Type B (1976)
  • Type C (1976)
  • VHS (1976)
  • VK (1977)
  • SVR (1979)
  • Video 2000 (1980)
  • CVC (1980)
  • VHS-C (1982)
  • M (1982)
  • Betacam (1982)
  • Video8 (1985)
  • MII (1986)
  • S-VHS (1987)
  • S-VHS-C (1987)
  • Hi8 (1989)
  • Ruvi (1998)
  • D1 (1986)
  • D2 (1988)
  • D3 (1991)
  • DCT (1992)
  • Digital Betacam (1993)
  • D5 (1994)
  • Digital-S (D9) (1995)
  • Betacam SX (1996)
  • Digital8 (1999)
  • MicroMV (2001)
High Definition
  • Sony HDVS (1984)
  • UniHi (1984)
  • W-VHS (1994)
  • HDCAM (1997)
  • D-VHS (1998)
  • D6 HDTV VTR (2000)
  • HDV (2003)
  • HDCAM SR (2003)
  • Phonovision (1927)
  • Ampex-HS (1967)
  • TeD (1975)
  • LaserDisc (1978)
  • CED (1981)
  • VHD (1983)
  • Laserfilm (1984)
  • CD Video (1987)
  • VSD (1990)
  • VCD (1993)
  • MovieCD (1996)
  • DVD (1996)
  • MiniDVD (c. 1996)
  • DVD-Video (1997)
  • CVD (1998)
  • SVCD (1998)
  • EVD (2003)
  • PVD (Personal Video Disc) (2003)
  • HVD (High-Definition Versatile Disc) (2004)
  • UMD (2004)
  • FVD (2005)
High Definition
  • MUSE Hi-Vision LD (1994)
  • VMD (2006)
  • HD DVD (2006)
  • BRD (BD/Blu-ray disc) (2006)
  • MiniBD (c. 2006)
  • HVD (Holographic Versatile Disc) (2007)
  • CBHD (China Blue High-definition Disc) (2008)
  • UHD BRD (Ultra HD Blu-ray disc) (2016)
VirtualMedia agnostic
  • DV (1995)
  • DVCPRO (1995)
  • DVCAM (1996)
  • DVCPRO50 (1997)
  • DVCPRO HD (2000)
  • CamCutter Editcam (1995)
  • XDCAM (2003)
  • MOD (2005)
  • AVCHD (2006)
  • AVC-Intra (2006)
  • TOD (2007)
  • iFrame (2009)
  • XAVC (2012)
Solid state
  • P2 (2004)
  • SxS (2007)
  • MicroP2 (2012)
Video recorded to film
  • Kinescope (1947)
  • Electronicam kinescope (1950s)
  • Electronic Video Recording (1967)
Authority control
  • GND: 4501545-4
  • NDL: 01033369

Mary Poppins: 50th Anniversary Edition (DVD + Digital Copy)
Mary Poppins: 50th Anniversary Edition (DVD + Digital Copy)
Released from the Disney Vault in celebration of its 50th Anniversary, this beloved classic shines on DVD with an all-new restoration. Winner of five Academy Awards, including Best Actress (Julie Andrews), Best Song (“Chim Chim Cher-ee”) and Best Visual Effects, Mary Poppins is a movie experience your family will enjoy over and over again. “Practically Perfect In Every Way” Mary Poppins flies out of the windy London skies and into the home of two mischievous children. With the help of a carefree chimney sweep named Bert (Dick Van Dyke), the spirited nanny turns every chore into a game and every day into a “Jolly Holiday.” Share the music, share the magic, share the joy of Mary Poppins with a whole new generation on Disney DVD.

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Harry Potter: The Complete 8-Film Collection
Harry Potter: The Complete 8-Film Collection
Harry Potter: The Complete 8-Film Collection (DVD)NOTE:Disc-The prisoner of azkaban starts playing with a preview of Polar Express and preview of Elf movies and then the actual movie Harry Potter -The prisoner of azkaban plays.

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Star is Born, A: SE (2018)
Star is Born, A: SE (2018)
Star Is Born, A: Special Edition (DVD)]]>

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The Greatest Showman
The Greatest Showman
The Greatest Showman

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The evolution story of Marvel’s most enigmatic, complex and badass character – Venom! Eddie Brock (Tom Hardy) is a broken man after he loses everything including his job and fiancée. Just when his life is at its lowest, he becomes host to an alien symbiote which results in extraordinary superpowers - transforming him into Venom. Will these powers be enough for this new lethal protector to defeat great evil forces, especially against the far stronger and more weaponized symbiote rival, Riot?

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National Lampoon's Christmas Vacation (Special Edition)
National Lampoon's Christmas Vacation (Special Edition)
National Lampoon's Christmas Vacation: Special Edition (DVD)Make merry as Chevy Chase, Beverly D'Angelo, Randy Quaid and an ensemble of comedy favorites strive to gift-wrap the "perfect Christmas" for the Griswold family. The most successful of the three vacations.]]>

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Body Groove Dance Your Heart Out DVD Collection
Body Groove Dance Your Heart Out DVD Collection
Your Dance Your Heart Out DVD Collection includes... 3 Complete Body Groove Workouts Each Body Groove Dance Your Heart Out workout series consists of six dance routines and each is workout is about 30 mins long.  Workout 1 (6 routines - 29 minutes) Workout 2 (6 routines - 27 minutes) Workout 3 (6 routines - 28 minutes) PLUS 3 FREE BONUS Groove Sessions Alive and Strong Workout (6 routines - 31 minutes) Relax and Restore Workout (6 routines - 28 minutes) Self-Care Session - This guided 14-minute self massage session is designed to empower your body's natural healing and restoration abilities. I recommend treating yourself to this amazing sensation at least once a week!

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The Equalizer 2
The Equalizer 2
Denzel Washington returns to one of his signature roles in the first sequel of his career. Robert McCall serves an unflinching justice for the exploited and oppressed – but how far will he go when it is someone he loves?

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Yellowstone: Season One
Yellowstone: Season One

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