DualDisc

DualDisc is an optical disc format for Computer storage digital data promoted by the RIAA. Essentially, DualDisc is a combination of a compact disc (CD) with a DVD, with one format on one side of the disc and the other on the opposite. The audio-only side is not a true CD; it does not conform to Red Book (audio CD standard) and may not play on all DVD or CD players. The inclusion of additional contents is considered an incentive to slow down copyright infringment file sharing. As of early 2005, several music albums are released in the United States in this format only. There has been some controversy surrounding the DualDisc format as of late, as a German inventor of the DVD Plus specification claims that DualDisc is in violation of its essential patents. There have also been reports of problems playing the CD side of DualDiscs on some players. Onkyo has issued a statement recommending that consumers not use DualDisc titles on Onkyo equipment. High profile releases in this format include Nine Inch Nails' remastered ''The Downward Spiral'' and new album ''With Teeth'' as well as Duran Duran's ''Astronaut (album)'' and Jennifer Lopez's ''Rebirth (album)''. Bruce Springsteen's new album ''Devils & Dust'' by Columbia Records was released on 26 April, 2005. This album was released in the United States only in the DualDisc format, showing its adoption by today's popular artists. In Europe and Canada, it was released as a CD+DVD package, containing all the content of the DualDisc. ==External links== *[http://www.dualdisc.com Official Website] *[http://www.dualdisclicensing.com/ DualDisc licensing] * [http://www.gizmodo.com/archives/dvd-forum-approves-dualdisc-016158.php "DVD Forum Approves DualDisc"], a 14 June 2004 Gizmodo entry * [http://www.nytimes.com/2005/03/21/business/media/21dual.html?ex=1401595200&en=935183cee9a4bd49&ei=5007&partner=USERLAND The Music Goes on Side A and the Flip Side Is a DVD] * [http://www.theregister.co.uk/2004/08/09/dualdisc_rollout_threat/ DualDisc rollout challenged by Euro patent holder] * [http://www.msnbc.msn.com/id/5626691/9 Reuters' '''DualDisc' headaches for record industry''] * [http://www.us.onkyo.com/faqs_detail.cfm?detail=1&id=140 Onkyo USA statement about compatibility] Audio storage 120 mm discs Certification marks DVD Video storage High end audio

DualDisc

== How can it be possible? == How do they do it? The data layer on a CD is beneath its printing area. The DVD's data layer is sandwiched in the middle of two polycarbonate layers of half the thickness. How do they combine the two physically incompatible formats?

 Side A surface
---------------- CD data layer
                   0.6 mm
---------------- DVD data layer
                   0.6 mm
----------------
 Side B surface

Possibly you can build a CD/DVD hybrid disc that is readable only from Side B: * CD: laser -> side B -> DVD (semi-transparent) -> CD data * DVD: laser -> side B -> DVD data How do you build a disc "with one format on one side of the disc and the other on the opposite"? Using two semi-transparent layers? * CD: laser -> side B -> DVD (semi-transparent) -> CD data * DVD: laser -> side A -> CD (semi-transparent) -> DVD data I don't know if early CD players can ignore the semi-transparent DVD layer in the middle of its optical path. -- User:Toytoy 00:20, Mar 22, 2005 (UTC) == SACD Comments == I removed the SACD comments because Sony's SACD format does not compete with DualDisc. SACD competes with DVD-Audio. While some record labels might distribute the album with DVD Audio on the DVD side of the DualDisc, it is not a requirement. Sony/BMG just seems to put the album on the DVD video portion of the disc. The SACD/DVD-Audio competition and debate really has nothing to do with DualDisc. --User:K1vsr 19:37, Jun 20, 2005 (UTC)

Dualdisc

#REDIRECT DualDisc

See other meanings of words starting from letter:

D

DA | DB | DC | DE | DF | DG | DH | DI | DJ | DK | DL | DM | DN | DO | DP | DR | DS | DT | DU | DW | DX | DY | DZ |

Words begining with DualDisc:

DualDisc
DualDisc
Dualdisc
DualDisc_albums