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Encyclopedia > D2 (video format)

D2 is a professional digital video tape format created by Ampex and other manufacturers through a standards group of the Society of Motion Picture and Television Engineers (SMPTE) and introduced at the 1988 NAB (National Association of Broadcasters) convention as a lower-cost alternative to the D1 format. Like D1, D2 video is uncompressed; however, it saves bandwidth and other costs by sampling a fully-encoded NTSC or PAL composite video signal, and storing it directly to magnetic tape, rather than sampling component video. This is known as digital composite. Digital video is a type of video recording system that works by using a digital, rather than analog, representation of the video signal. ... Bottom view of VHS videotape cassette with magnetic tape exposed Videotape is a means of recording television pictures and accompanying sound onto magnetic tape as opposed to movie film. ... Ampex is based in Redwood City, California. ... Video compression deals with the compression of digital video data. ... NTSC is the analog television system in use in Japan, United States and certain other places, mostly in the Americas (see map). ... For other meanings of PAL see PAL (disambiguation). ... Composite video is the format of an analog television (picture only) signal before it is combined with a sound signal and modulated onto an RF carrier. ... Magnetic tape is a non-volatile storage medium consisting of a magnetic coating on a thin plastic strip. ... three RCA cables form the component video Component video is a type of analog video information that is transmitted or stored as two or more separate signals (as opposed to composite video, such as NTSC or PAL, which is a single signal). ...


Ampex conceived of D2 as a more practical solution for TV Broadcasters since it could be inserted into existing broadcast chains and studio facilities without extensive redesign or modifications. This was because, among other things, in addition to it's lower purchase and operating costs this D2 composite digital tape transport accepted standard RS-170A analog inputs and outputs.


D2 used 19mm (¾) metal particle tape loaded into three different sized cassettes. PCM-encoded audio and timecode are also recorded on the tape. Although the D2 tapes are similar in appearance to the D1 format, they are not interchangeable. A standard audio cassette Cassette may refer to: A small cartridge of some form. ... PCM is an initialism which can have different meanings: Phase Change Material Pulse-code modulation (a way to digitally encode sound) Potential Cancer Marker Communist Party of Mexico Plug Compatible Manufacturer Power-train control module - computer in a car which controls the car to minimize emissions and increase fuel economy... Timecode is also the title of a 2000 film directed by Mike Figgis which was shot in one continuous take. ... Sonys D1 format was the first major professional digital video format, introduced in 1987. ...


D2 had a relatively brief heyday. As of 2003, only a handful of broadcasters use the D2 format, and even then only to access materials recorded when the format was more popular. 2003 (MMIII) is a common year starting on Wednesday of the Gregorian calendar. ...


Panasonic's competing composite digital format is known as D3. Panasonic is principal sponsor of the Toyota F1 team Panasonic was also the name of a road bicycle racing team and a Finnish electronic music duo. ... D3 is a professional digital video tape format. ...


See also


  Results from FactBites:
 
D2 - Wikipedia, the free encyclopedia (146 words)
d2, tabletop role-playing game parlance for a two-sided die, such as a coin
In town and country planning in the UK, D2 is the code for permission to use specific land or premises for leisure (cinemas, swimming baths, gymnasiums).
D2, a High Carbon Steel Alloy, commonly used in knives and tools.
  More results at FactBites »

 
 

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