2016-02-20, 12:41
(2016-02-20, 05:00)alanisrox69 Wrote: noggin, this was the KU back haul for the Grammys, I don't have my CBand dish up yet (need some non freezing weather to get it finished) but last year and previous years there was a 55mbps MPEG-2 4:2:2 feed on Cband for the Grammys. That said, this year I didn't see any posts with a location for that feed, only a ~26mbps (video) KU feed for the Grammys. Either way, it's still awesome quality compared to what the local stations do to the video when they compress it to 10mbps lol.
Yep - 26Mbs sounds a bit marginal for 'challenging' content like the Grammys. The 34ishMbs MPEG2 4:2:2 Eurovision feed had visible compression artefacts - the 38Mbs H264 version looks a lot nicer.
The old rule of thumb for MPEG2 was 2:1 for concatenation - so if you were broadcasting at 13Mbs then your source needed to be at least 26Mbs, and if that was your distribution codec bitrate then your contribution/backhaul needed to be about 50Mbs? (though this ignored 4:2:0 vs 4:2:2)
