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by Nigel Spratling, President of Echolab with Dale Matthews
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One way to shoot a sports event would be to shoot in 720p. When translated to 1080p, this should look pretty good. And at a 30p frame rate, the motion content will be at full resolution. 30p frame rate production requires only half the bandwidth of a 60p equivalent. This means you can compress it less because it starts out with only half the content. If we look at a 24 frame rate, there are some problems with asymmetric judder, which is speed dependant, and that’s something which is more readily noticeable. Yet, out of all the systems, it has the least requirements. It’s great with compression and great where people are trying to squeeze the most out of a particular pipeline or delivery vehicle. Plus, mathematically, it works very well with Middle East 50p systems. So the technical answer is that 24 or 30 frame progressive compresses heavily and still looks good. No complex deminterlacing is necessary and it requires less the than half the bandwidth of the 60 rate content. That saves you an awful lot of space. It allows you to put more than twice the data on disk. So you get twice the storage capacity on any system, whether you’re putting it on servers, disks, or even tape. And 24p also allows the easy conversion for international productions.
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