If SBS switched SBS1-HD to MPEG-4 what would they do with the remaining bitrate?
They can't use MPEG-4 for *all* of the multichannels because you'd be ripping away a bunch of services for those with MPEG-2 HD terrestrial … though you didn't directly address how many of those remaining are out there, but looking at the 7flix experience, it's a lot.
So that doesn't sound very relevant to DVB-T planning then?
Foxtel's satellite has very different bitrate (and quality) MPEG-2 SD channels on it from the FTA channels. They pay for the satellite bandwidth quite separately and skimp a bit as a result. Those channels aren't going anywhere, and I wasn't talking about them.
Foxtel's cable channels come off the stick, probably inserted via ASI streams, but adding a down-convert would be a doddle. Or you know what would be just as easy? Inserting the missing channel off the satellite version.
The Foxtel argument is a non-starter.
EDIT: I just realised the Mystar T500 has terrestrial MPEG-2 SD only, but I really hope they've been cycled out for T600, T601 or IQ3 Sat.
Three months ago I was in Germany, watching people take home new flat panels on the train, advertising "HEVC" and "DVB-T2" on them. Looked like the new basic feature.
Things are moving ahead in NTSC-land too: They are breaking with backwards compatibility *again*, which goes against their history of loving an old standard to death — 525-line went from 1941 in B&W to 1953 in colour until 2009.
The new ATSC 3.0 will be using OFDM much like DVB-Tx, but this time squeezing 26 to 28 megabits out of a mere 6 MHz channel.
Apart from some keen South Korean networks, North Carolina's WRAL-TV is already running an ATSC 3.0 simulcast — in fact it's a triplecast, since their main channel is on ATSC at 1080i MPEG-2, their new simulcasts are at 1080p HEVC (cross-convert of their main channel) and 2160p HEVC (demonstration loop), all at 60fps. (Not sure if it's true 60fps or 59.94fps). WRAL-TV was the first on-air with ATSC 1.0 way back in 1996 ("MPEG! on a TV channel!")
There's also a ton of interactive and multi-angle capability built into ATSC 3.0, which seemed to be a reaction a few years ago to the internet, or a catch-up to feature parity with UK's DVB+MHEG minimum requirements. Overall, ATSC 3.0 is a great modernisation and seems to have more in common with DVBV-T2 than different now. But all WRAL-TV is using it for is roughly 20-24 megabits for 4K video and 4-8 megabits for HD.
Our capital cities have space at VHF 9 and 10 — has this been sold off? If not, they should do about 35Mbps each. In the 10-year timeframe it should become possible to achieve acceptable 4K quality within 2 channels statmuxed in HEVC in 35Mbps … total 4. One each for the commercials, and one to share amongst ABC+SBS?