Berkeley CSUA MOTD:Entry 25135
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2025/05/24 [General] UID:1000 Activity:popular
5/24    

2002/6/18 [Computer/HW/Drives] UID:25135 Activity:high
6/17    I heard that DVDs are 17Gig, but why are DVD-RW only 4 Gig?
        \_ DVDs are only 6 Gigs.  stfw.
           \_ YOU search the fucking web. Double-sided, double-layer DVDs
              can store up to 17GB.
              http://www.dvdforum.org/tech-dvdprimer.htm
              \_ Fuck off.  I'm not the one asking the question that is asking
                 questions that are trivially answered by google.
                 \_ Well, maybe you should've just answered with "stfw"
                    instead of responding with a bogus answer.
                    \_ Well Mr. Smarty Pants, you sure showed me.  This is a
                       lesson I won't soon forget.
1) DVD-5 - 1 Layer single side 4.7GB
2) DVD-9 - 2 Layer single side 8.5GB
3) DVD-10 - 1 Layer double side 9.4GB
4) DVD-17 - 2 Layer double side 17GB
        Writers today are DVD-5 only. I'd wait till DVD-17 comes out
2025/05/24 [General] UID:1000 Activity:popular
5/24    

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www.dvdforum.org/tech-dvdprimer.htm
We believe that it answers most basic questions, but if you have suggestions for information to add to the Primer, please contact us at the Secretary Office (Tel: +81-3-5777-2881 Fax: +81-3-5777-2881). It can accommodate a complete movie on a single disc, content rich multimedia or very high quality multi-channel audio. But you should check with your DVD brand's dealer to confirm compatibility with CDs. The market for DVD has grown faster than CD or VHS did in their first two years in the USA, Europe and Asia. A recent market research study predicts that DVD will become the standard home video format, replacing video cassettes within the next five years. Sales of DVD hardware will reach 46 million units in 2000, including 21 million in the United States and 17 million in Europe, according to the report. Like CDs, DVDs store data in microscopic grooves running in a spiral around the disc. All DVD drive types use laser beams to scan these grooves: Minuscule reflective bumps (called lands) and nonreflective holes (called pits) aligned along the grooves represent the zeros and ones of digital information. These technologies allow them to store data seven times as large as that of a CD. The narrow tracks require special lasers--which can't read CD-ROMs, CD-Rs, CD-RWs, or audio CDs. DVD Video For viewing movies and other visual entertainment. The total capacity is 17 gigabytes if two layers on both sides of the disk are utilized. DVD-ROM Its basic technology is the same as DVD Video, but it also includes computer-friendly file formats. This product should supplant conventional CD-ROMs in the near future. Originally designed for professional authoring, a version for general consumer use is now under development. DVD-RAM This makes DVD a virtual hard disk, with a random read-write access. DVD-RW Similar to DVD-RAM except that its technology features a sequential read-write access more like a phonograph than a hard disk. DVD Audio The latest audio format more than doubles the fidelity of a standard CD. DVD Multi is not a new format, but a set of specifications that will define which drives will read and write which disks for the various DVD consumer and computer applications. DVD Multi is targeted at providing broader compatibility across DVD disks, and will embrace all existing format versions. A DVD can store over two hours of video on one layer of the disc. A CD can store just 74 minutes of data -- just enough to hold Beethoven's Ninth Symphony. DVD video storage provides resolution which is far greater than that offered by laser disc media and almost twice the resolution of standard VHS videotape. This resolution is dependent on the capabilities of the television monitor used, but you need not have a new monitor to enjoy the benefits of DVD. One more advantage is that a DVD disc is not physically touched while it spins in the player, so there is no wear and tear or loss of fidelity over time. In contrast, videotapes do touch a playback mechanism and eventually break down, degrading the quality of picture. Movies -- The movie industry needs a disc capable of holding a full length movie of execellent quality video with surround sound audio. Computers -- The computer industry needs higher capacity for the increasingly complex multimedia applications which are now being developed. The computer industry also needs new recordable and re-writable versions of DVD for data storage and archival. Entertainment -- The entertainment industry needs DVD for new video games with better and more realistic video content. The music industry wants a higher quality format than CD, as well as increased playing time. DVD Forum is the core DVD industry organization for establishing DVD format standards. Virtually every major company involved in DVD is a member of DVD Forum.