On 9/Jul/20 22:49, Masataka Ohta wrote:
We should also use IP even over radio waves. IP over MPEG2-TS over DVB (or terrestrial broadcast network) is doable though IP directly over DVB should be better.
Well, when we moved over from traditional satellites to inclined orbit satellites back in 2000 across most of Africa, IP was carried directly over DVB for downlink traffic. The uplink traffic still required regular SCPC modems. We had to use a DVB decoder reconfigured for IP carriage (rather than video) to decode the DVB stream (via a unique key, since DVB is a Multicast-type medium) and pass the IP packets over to your router. So yes, this technology does exist, and is way cheaper than SCPC in the downlink direction.
Unicast video over satellite link costs a lot.
Which is my point, and makes me wonder whether we shall ever see 1080p or greater via satellite, en masse. DVB, however, is more Multicast-y. So technically, you aren't unicasting video over DVB, which is what a number of satellite TV providers are using to deliver their services. Mark.