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The DVD (common abbreviation for digital video disc or digital versatile disc) [9] [10] is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan .
DVD (initially an acronym of "Digital Video Disc", then backronymed as "Digital Versatile Disc" and officially just "DVD") was the mass market successor to CD. DVD was rolled out in 1996, again initially for video and audio. DVD recordable formats developed some time later: DVD-in late 1997 and DVD+ in 2002.
The same general situation applies to digital cable service; only DVD recorders with integrated digital cable ("QAM") tuners can avoid transcoding, and then only if the digital cable system is already sending a DVD-Video-compatible MPEG-2 stream, which again requires transcoding of all HD content and some if not all SD content.
Enhanced Versatile Disc (EVD) Forward Versatile Disc (FVD) Holographic Versatile Disc (HVD) China Blue High-definition Disc (CBHD) HD DVD: HD DVD-R, HD DVD-RW, HD DVD-RAM; High-Definition Versatile Multilayer Disc (HD VMD) VCDHD; GD-ROM; Personal Video Disc (PVD) MiniDisc : MD Data, MD Data2; Hi-MD; LaserDisc : LD-ROM, LV-ROM; Video Single Disc ...
Originally to be known as "digital video disc", the name changed before release to be "digital versatile disc" to indicate that it was also useful for computer storage. [13] Over time, DVDs followed a similar pattern as CDs; Pioneer introduced a write-once format in 1997 that could be read in existing DVD drives, DVD-R. [14]
Usable with some high-end security digital video recorders, such as the Tecton Darlex, as a secure and long-lasting export medium. Holds more data when using Double Sided discs than dual-layer DVD+RW and DVD-RW - 9.4GB for DVD-RAM vs 8.5GB for DVD+RW DL and DVD-RW DL.
In the late 1980s and early 1990s, Optex, Inc. of Rockville, MD, built an erasable optical digital video disc system U.S. patent 5,113,387 using Electron Trapping Optical Media (ETOM) U.S. patent 5,128,849. Although this technology was written up in Video Pro Magazine's December 1994 issue promising "the death of the tape", it was never marketed.
HDMI is a digital connection for carrying high-definition video, similar to DVI. Along with video, HDMI also supports up to eight-channel digital audio. DVD players with connectors for high-definition video can upconvert the source to formats used for higher definition video (e.g., 720p, 1080i, 1080p, etc.), before