DVD Logo – The DVD is an optical disk for data storage standard which emerged in 1995. His initials correspond with Digital Versatile Disc English (digital versatile disc translated into Spanish). In the beginning, the v term referred to video (digital videodisk), due to its development as a replacement format VHS video for distribution to households.
DVD: The name of this device refers to the multitude of ways in which data is stored: DVD-ROM (read-only device), DVD-R and DVD + R (can only be written once), DVD -RW and DVD + RW (can record and erase times as you like). Also differ in the storage capacity of each of the types. In the early 1990’s, two standard high-density optical storage were developed: one was the Multimedia Compact Disc (MMCD), backed by Philips and Sony, the other was the Super Density Disc (SD), supported by Toshiba, Time Warner, Matsushita Electric, Hitachi, Mitsubishi Electric, Pioneer, Thomson and JVC.
Philips and Sony abandoned their MMCD format and agreed to adopt the Toshiba SD, but with one change: the adoption of EFM Plus Philips, created by Kees Immink, who despite being 6% less efficient than the Toshiba coding system (hence the capacity is 4.7 GB instead of the 5 GB of SD original), has the great advantage that EFM Plus has high resistance to physical damage to the disk, such as scratches or fingerprints. The result was the creation of the DVD Consortium, founded by the former companies, and the specification of version 1.5 of DVD, announced in 1995 and completed in September 1996.