A place for people to discuss future hardware and software product news
WMC is/was the best Windows DVR interface, but there are others alive and well. Additionally, SD's streaming service is far from satisfying what most cable customers have become accustomed to in terms of number of channels and picture quality.
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Different processor since the one in the original PRIME doesn't exist anymore and couldn't handle 6 streams anyway. Channel tuning time at the hardware level was already at like half a second and can't get noticeably faster. Any delays are on the client side, mostly buffering and waiting for an I frame, and new hardware can't help either of those.
ATSC specifies just under 20Mbps per channel. Extrapolating, this would mean a maximum of just under 120Mbps. Realistically, this will never occur, because when the Prime tunes a channel, it filters out the streams of the other channels carried on that frequency. In my experience an HD cable stream will be about 8Mbps, with peaks for action/sports, so call it 10Mbps.
In practice, 100Mbps should be fine. If you are streaming multiple HD action streams (like several sports channels), then you might saturate the feed for a bit. But realistically it probably won't be a problem.
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