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It's interesting you should post this. I just got X11 hooked up today and I've been fiddling with it all evening. I have multiple tvs and realize that I just downgraded my video quality by switching to Xfinity :-( I don't see the crispness I am used from previous cable company. It's as if it's not true 1080p.
no one in usa is broadcasting in 1080p
future at comcast is 720p60 and mpeg4
that's understood but the upscaling done just is not what I'm used to. I am sure I have it on the correct settings. I can still plug in my old WOW box because i haven't shut that off. Another odd issue is that when I stream netflix I can see banding issues on dark screens. This is actually common when you attempt to show HD at a lower resolution. So even though I'm at 75mbps, which is almsot 10x my previous speed, are you trying to tell me I don't have enough to stream netlix properly?
Why is the picture you supplied grossly zoomed in? That would of course show pixels.
Try setting your TV picture setting to "Fit screen".
Is the cable-box set to 1080i or 1080p? You could also try 720p to see what happens.
I agree that Comcast's HD is pretty terrible. It always looks a bit pixelated on my 4k LG HDR TV. It's remarkable how much worse it is than accessing HD video through my Smart TV's app's, like Netflix. I even find it better to stream with Chromecast. For example, my friend's and I watched Game of Thrones together and realized it was much better to wait until the stream started on HBO Go and to stream that to the TV with Chromecast than to watch the show on HBO as it aired via the cable connection. Strange that a streaming video over Wifi casted to the TV is Crystal clear when the cable connection to the TV is far worse. Any idea when Comcast will up its game in this regard?
what do you have the output of the set top box output? native is 720p60 for all but maybe a few local channels that might be in 1080i
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To help residents and emergency personnel stay connected during this time, Comcast is opening up Xfinity WiFi outdoor and SMB hotspots in these communities to anyone who needs them, including non-Xfinity Internet subscribers.
This will be starting at 4:00 PM ET on Monday, March 5, 2018, through Friday, March 16, 2018.
For more about these open Xfinity Hotspots see here.