@paul1277wrote:I know I have read that sky could broadcast using HDR10 for on demand and normal programs but as I understand that can not be used for live streaming, you have to use HLG. It just I have not seen from sky they will be using hlg for live streaming. I have seen 4k and atmos for live football but not hdr/hlg. Again I could be wrong and if I am I will happily except being shown wrong as long as I don't get shouted at please.
Correct for both "live streaming" and actual live broadcasting (which is what Sky do), HLG is the world beater.
Sky don't do any live streaming now, I highly doubt they are going to start. [not including any future Netflix app which may include it]
Sky currently deliver programmes in two ways.
1. Broadcasting via a satellite dish, which you can watch live or record the broadcast onto disc for later playback. This is real broadcasting in the traditional sense, and these will be HLG broadcasts as discussed. It is one stream of data being created at one time (uplinked to a satellite) with all us viewers receiving the same thing (via a dish, LNB, and satellite receiver) in our homes at precisely the same time.
2. "On Demand" downloading of whole programmes. This is never used for live events, by definition. In theory, Sky could have a completely separate HDR10 set of files to use for this, but it would make their systems massively more complicated - they've have to spend all the time creating the HDR10 files from the original HLG broadcasts. Instead of what they are more likely going to do, send people the HLG files. Yes you can start watching the file before it's finished downloading, but it isn't a "live stream" being created at that moment, it is a complete file created earlier.
(3) Other programme providers (not Sky) offer "live streaming" where you can join a stream, such as on YouTube, and everyone gets it at the same time. But it's not being "transmitted" and "recieved" really in the broadcasting sense. It's more "mult-casting".
Some people have recently started calling numbers 2 and 3 "broadcasting", but this is incredibly unhelpful in these discussions which are already confusing enough. It muddies the waters, and it's not "broadcasting" in the traditional sense. So personally I don't see the need to lump something new and different ("on demand" downloads, at a time of your choosing) in with an already well-established and understood word which has a specific meaning; regretfully that ship appears to have sailed, but I'm definitely not aboard it. For clarity, it really doesn't help when we're in technically discussions to blur things.
