About HDV

[b][font=新細明體][size=18pt]High Definition is Not Just For the Future. It’s Here Right Now.[/size][/font][/b]
*qM6l/Y:fRL [font=新細明體]The new HDV format is poised torevolutionize high definition production in the same way DV7P[^i2j
revolutionized standard definition. But innovations also raise questions. ThisWeb site aims to answer~9G,^:@g
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[b][font=新細明體][size=18pt]What is HDV?[/size][/font][/b]'Ua8uX`JY
[font=新細明體]It is a common misconceptionthat HDV and HD formats are the same. Simply put, HDV is a video format thatuses the HD line resolution (1080i or 720p) in a highly compressed format:MPEG-2 Transport Stream. This creates a stream that is small enough (roughly 25Mbps @1080i, 19Mbps@720p) to fit on a standard DV tape. In addition to the datacompression of the MPEG-2 format, HDV does not store all of the data thatfull-resolution HD video has. For example, one form of uncompressed HD is a1920 x 1080 interlaced frame, but the similar HDV spec stores a 1440 x 1080interlaced video frame. This combination of MPEG compression with a reducedframe size keeps HDV more manageable while also keeping the quality of the videovery high. This technology also makes HD video resolution much more affordablethan ever before. [/font]
e0_t-X\ [font=新細明體]A common analogy used tocompare HDV and HD is to compare uncompressed Standard Definition (SD) to an SDMPEG format such as that used for DVDs. An uncompressed SD file is very largefile compared to the highly compressed MPEG format, but the can both be thesame resolution (720 x 480 is a common example). This is a very similarrelationship full HD video and HDV video has with each other. [/font]p7DGf-q!mG8FaE
[b][font=新細明體][size=18pt]Overview Sections[/size][/font][/b]
6|z t7lX1n&r#~m+iGZ [list][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/bgdigimgs.html][b]Background     on Digital Images & Imaging[/b][/url] IHJ*@]0H*E ^
     When the DV format first appeared, about eight years ago, it was a massive     improvement over VHS. It was a digital video format, which meant an end to     tape noise, and the images were so sharp and clear that it was easy to     mistake them for those produced on hitherto more expensive ‘professional'     video cameras._F6]LIf4X
     [ [url=http://www.canopusedu.com/abouthdv/bgdigimgs.html]more[/url] ][/font][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/hidefvideo.html][b]High     Definition Video[/b][/url]?i2ZC6tD
     In fact, high definition video has been around for a number of years. In [/font][font=新細明體]America[/font][font=新細明體],     you can buy high definition televisions, and watch high definition video     content on all the major networks.
)hU-z3[yb]4r0p      [ [url=http://www.canopusedu.com/abouthdv/hidefvideo.html]more[/url] ][/font][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/compress.html][b]Data     & Compression[/b][/url] ~Ds(D@
     What's good about HD is that, with five times SD's number of pixels, the     pictures are fantastic. What's not so good is that the amount of data you     need to store and move around goes up by a factor of five as well.A4f&s1|~*A)f+H:cOa
     [ [url=http://www.canopusedu.com/abouthdv/compress.html]more[/url] ][/font][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/codecs.html][b]Compression     Using Codecs[/b][/url] Vj dx:y(o(o,n%h
     You can't modify compressed video without decompressing it. You can't view     it in its compressed form.
VV'Ej&e|      [ [url=http://www.canopusedu.com/abouthdv/codecs.html]more[/url] ] [/font][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/deliverhdv.html][b]Delivering     HDV[/b][/url]
ND!w-K!k\Z"u      When you shoot a video in HDV, the process starts with the light-sensitive     element in the camera. Sony's HDV camcorders actually have three of     them...
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DD,EA      [ [url=http://www.canopusedu.com/abouthdv/deliverhdv.html]more[/url] ][/font][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/videoconnect.html][b]Video     Connections with HDV[/b][/url]!USu3{-xG*dEz
     There are five types of connection that can work with HD: Component, VGA,     DVI, HDMI and HDSDI.7i.i3YG[p5K4}l
     [ [url=http://www.canopusedu.com/abouthdv/videoconnect.html]more[/url]     ][/font][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/pvsi.html][b]Progressive     vs. Interlaced[/b][/url]
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zL8[7ab      Interlaced video has been around as long as there have been televisions     with Cathode Ray Tubes (CRTs).
Yb'zs {(p      [ [url=http://www.canopusedu.com/abouthdv/pvsi.html]more[/url] ][/font][*][font=新細明體][url=http://www.canopusedu.com/abouthdv/practicalhdv.html][b]HDV     in Practice[/b][/url]
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Ju I^%E      Imagine you're a wedding videographer. You've decided to go with HDV and     have a 1080i HDV camcorder and a Canopus HDV editing system.
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@0Y;oRAJ3Jk many thx for share