There are many competing digital video tape formats, from among them the more venerated 19-mm D-1 video tape format is a very common, (and very expensive,) UNCOMPRESSED, 270 Mbps, standardized* digital component video tape format used in the most demanding professional video applications. The majority of DVD-Video discs you’re likely familiar with were mastered from D-1 master tapes, hence the oddball 3:2 (720×480) frame aspect ratio of the DVD-Video standard. There are several factors, particularly the cost and the large form factor, that are responsible for the rare use of the D-1 video tape format outside of traditional broadcast and professional video production applications.
Digital Video (“DV”), and its smaller form factor offspring “MiniDV,” are indeed COMPRESSED digital component video tape formats, including both codec and tape specifications, which are codified in the international standard IEC-61834 as well as SMPTE standards SMPTE 370M, SMPTE 371M, and SMPTE 390M. The 6.35 mm DV tape format is extremely popular amongst serious videographers - from consumer to semiprofessional. Various versions of the DV format have been widely used as a cost-effective digital video format by independent filmmakers and have also found periodic use in professional video applications such as electronic news gathering (ENG) and broadcasting. The basic “DV” format uses 5:1 DCT intra-frame compression at a fixed bitrate of approximately 25 megabits per second (Mbps).
*(SMPTE Standards SMPTE 224M-2003, SMPTE 225M-2003, SMPTE 226M-1996, SMPTE 227M-1996, and SMPTE 228M-1996.)
A Digital Video Primer
http://www.adobe.com/motion/events/pdfs/dvprimer.pdf
http://www.adamwilt.com/DV.html
http://en.wikipedia.org/wiki/DV
http://users.tkk.fi/~iisakkil/videoformats.html
*http://store.smpte.org/category-s/22.htm
2007-10-15 20:01:32
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answer #1
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answered by ? 5
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This Site Might Help You.
RE:
What's the difference between NTSC D1 and NTSC DV?
When/where is D1 typically used and why?
2015-08-18 15:06:38
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answer #2
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answered by ? 1
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D1 (or Full D1) refers to a picture size of 720x480. This is the size used in DVDs and other professional video equipment.
DV is actually a codec for compressed video.
2007-10-15 17:48:08
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answer #4
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answered by TV guy 7
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