PRODUCTS: Standards
120 Forum Members Set DVD Standards
The DVD Consortium (later renamed DVD Forum) was formed to hammer out a single standard. The consortium consisted of Matsushita, Mitsubishi, Pioneer, Philips, Hitachi, JVC, Sony, Thompson, Toshiba and Times Warner. Monitored closely by the entertainment and computer industry alliances, the Consortium developed the DVD-ROM standards that would provide 4.7GB capacity on a single-sided disc and would enable read-compatibility with existing CD-ROM, CD-R and CD-RW media.
The DVD Forum membership, which included content developers and other interested parties, established several working groups to attack a broad range of issues, including recordable (write-once, read-many) and rewriteable media requirements. These requirements included:
A single format for computer, TV-based applications
Backward read compatibility with current CD technology
Forward read compatibility with future R/W and WORM discs
Single file system for all content and disc media types
Low cost
No mandatory container
Reliable data storage and retrieval
High on-line capacity
High performance for sequential, non-sequential data
Following a three-month evaluation of drive and media compatibility by more than 20 personal computer and storage media manufacturers from around the world, the DVD Forum unveiled the DVD-R and DVD-RAM standards in 1997. Since then, the DVD-RAM standard has been adopted by the Japanese Industrial Standard (JIS) and the European Computer Manufacturer's Association (ECMA) and is being reviewed by ISO (International Standards Organization).
The present DVD-RAM standard provides 2.6GB of single-sided storage capacity; read compatibility with DVD-ROM, DVD-R, CD-ROM, CD-R and CD-RW media and a road map for regular capacity increase milestones. In addition to providing fast data access, the initial products already provide very low-cost storage solutions (2.6GB single-sided media provides a storage cost of only .009¢/MB and double-sided 5.2GB media provides a storage cost of only .008¢/MB).
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