YouCantWootThis wrote:USB is fast enough. Uncompressed HD is about 20 mbps. USB 2 is 480 mbps.
That is to say, what you have on a Blu-Ray is about 20-24 Mbps, encoded with H.264 or VC-1 (WMV) Uncompressed HD is quite larger, and can't be done over USB for more than short bursts. (Believe me, I've tried HD video editing on a usb drive. Terrible.) (USB is burst-rate, not constant)
Digital Television is broadcast (for the most part) in MPEG-2, which is the older, less efficient standard that's used in DVDs (though HD, of course) What this means, I'm not sure. Either HD Broadcasts aren't super-high quality to begin with (quite possible) or this USB device squeezes it shortly before sending it to your computer so it can make it through bursts of USB speed unharmed.
That said, this'll probably do it fine.