Ummmm... 1.4GBps is a lot more than four times 19.2Mbps. By those calculations, MPEG-4 video at 2160i would be about 600Mbps, though I suspect good quality compression would get it a little lower. If they could somehow convert 2160i signal into 4 different 1080i signals on the fly and get them synched, then you might be able to do it under 50Mbps.
Just for reference -- Sony's 4K digital cinema projectors can display 4096 x 2160 in movie theaters. I wrote last week about the possibility of showing live TV events at that resolution in theaters, actually...
“The other one is a biggie, and it's something very noticeable in the videos: touch sensitivity is pretty bad. Using the virtual keyboard proved to be far too painful, and we're pretty sure it wasn't multitouch-friendly.”
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Ummmm... 1.4GBps is a lot more than four times 19.2Mbps. By those calculations, MPEG-4 video at 2160i would be about 600Mbps, though I suspect good quality compression would get it a little lower. If they could somehow convert 2160i signal into 4 different 1080i signals on the fly and get them synched, then you might be able to do it under 50Mbps.
Just for reference -- Sony's 4K digital cinema projectors can display 4096 x 2160 in movie theaters. I wrote last week about the possibility of showing live TV events at that resolution in theaters, actually...
http://www.permanent4.com/2005/10/desperation-at-dodecaplex-v-who-needs.html