It is a common misconception that the HDV and HD formats are the same — they are not. Simply put, HDV is a video format that uses 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 25 Mbps @1080i, 19Mbps @ 720p) to fit on a standard DV tape. In addition to the data compression of the MPEG-2 format, HDV does not store all of the full-resolution HD video data. For example, one form of uncompressed HD is a 1920 x 1080 interlaced frame (1080i), but the similar HDV spec stores a 1440 x 1080 interlaced video frame. This combination of MPEG compression with a reduced frame size keeps HDV more manageable, while also keeping the quality of the video very high. This technology also makes HD video resolution much more affordable than ever before.
A common analogy used to compare HDV and HD is to compare uncompressed Standard Definition (SD) to an SD MPEG format such as that used for DVDs. An uncompressed SD file is very large compared to the same content that has been highly compressed in the MPEG format. The relationship between HD and HDV is quite similar.
In order to fully understand the advantages, as well as the challenges of working with this new format, it is helpful to learn more about HDV. In this HDV Primer, you’ll find:
When the DV format first appeared, 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. [more...] High definition video has been around for a number of years. In America, you can buy high definition televisions, and watch high definition video content on all the major networks. [more...]
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. [more...]
You can't modify compressed video without decompressing it. You can't view it in its compressed form. [more...]
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... [more...]
- Video Connections with HDV
There are five types of connection that can work with HD: Component, VGA, DVI, HDMI and HD-SDI. [more...]
Interlaced video has been around as long as there have been televisions with Cathode Ray Tubes (CRTs). [more...]
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. [more...]
| Not quite ready? Still editing in DV? No problem. With EDIUS NX or EDIUS NX with HD Expansion Kit, you'll be ready for the future while still being able to work in DV. If you are investing in an editing system today, why limit yourself to DV-only systems? Why not future-proof your video production? EDIUS NX systems get you into tomorrow's technology today.   Why use EDIUS tools? Built with the Canopus HQ codec, EDIUS tools enable you to edit and preview your HDV project in realtime without compromising quality or resolution. Canopus delivers HDV tools you can use for today's technology and tomorrow's.
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