Well China is predominantly 'cable' to group all wired and wireless (ip
or not) delivery services together, plus satellite. India has a lot of
DTH as well as cable. But still a lot of over-the-air. Indonesia and
Thailand are geographically dispersed and rely very much on satellite.
Combined with a few other large and highly populated counries make up
half the world population. Here in Holland DVB-T2 launched last year, it
has a number of 100P channels, but highly compressed and pre-filtered.
So the quality isn't as abismal as it was on DVB-T, but still with only
three muxes for 31 channels... The marketshare is continuously
declining, dropped below 300K subs. Were´s no longer on 95% cable, DSL
and fiber telco service has made serious inroads in the TV delivery
market. In North/Western Europe Including the UK most TV comes in via
wired services or the ultra small aperature TVRO.
To paraphrase tvmark Schubin, when satellite companies advertise we
carry 4000 channels and 200 HD channels, that doesn't mean the other
3800 channels are all 8K;-).
So I doubt the majority still comes in via an antenna, unless you
include parabolic reflectors and milimeters long antenna's. That doesn't
mean most of TV isn't SD. In the US satellites couldn't move to HD due
to insufficent capacity, now there's plenty capacity and less demand
from channel operators.
Sufficient bandwidth lower spatial resolution looks better than higher
nominal but compromised spatial reolution at lower bandwidth. Most
famous examples was The BBC lowering its satellte datarade for its HD
channel, no we didn't lower quality followed by most peole watch at 5
time picture height so at five picture heights you will not see a
difference. I.e. good bye HD, welcome ED. And on the other end ARD and
ZDF increasing SD bitrate to improve quality, awaiting the longer off
transition to HD.
Alan Roberts schreef op 23-03-2020 15:21:
That may be true in parts of the US, but the rest of the world is a
hell of a lot bigger than that. The vast majoerity of TV, worldwide,
is watched via an antenna.
Alan Roberts
On 23/03/2020 11:49, Craig Birkmaier (Redacted sender brewmastercraig
for DMARC) wrote:
We have been able to broadcast multiple HD and SD signals in a 6 MHz channel for more than a decade. But let’s not fool ourselves about the quality of the delivered signals; pre-filtering can significantly reduce encoding stress, but it ALSO reduces delivered resolution. And it is uncommon for broadcasters to deliver multiple programs with high motion content (e.g. sports) in these multiplexes.
What Bert is missing in this discussion is that the vast majority of consumers do not watch these broadcast signals; they are watching signals delivered to cable systems, DBS systems, and now VMVPD systems. And THESE signals are almost ALWAYS of better quality than the highly compressed signals that are being squeezed into broadcast multiplexes, as they are encoded for delivery via dedicated digital links and even the public internet.
On Mar 22, 2020, at 10:09 PM, Manfredi (US), Albert E <albert.e.manfredi@xxxxxxxxxx> wrote:----------------------------------------------------------------------
Heh heh. Many of the old issues, still being discussed. For what it's worth, and for those who might not know, there has been a heck of a crunching down of spectrum, for US OTA broadcast stations. It is now common to see two major stations in a market, sharing a single 6 MHz channel. (The stations continue to use their old channel number for ID, but it's what they call a virtual channel. So users are universally unaware. You can tell best by doing a manual channel scan, or look up the frequencies at the FCC site.)
More to the point, it is common to see these two stations both broadcasting HD, in this shared 6 MHz channel. And both also broadcasting a complement of 480i SD programs, all in that same, shared, 6 MHz channel.
Well, guess what. The HD streams can be either 720/60p or 1080/60i, and still fit into that single 6 MHz channel, shared with several SD streams. And the HD looks like good HD, to boot.
All of this, using 8T-VSB cum MPEG-2 (H.262) compression. These religious battles can rage on, year after decade. Even in the face of evidence that the religion is, as always religions are, egregiously overstated.
Stay safe. Wash hands. Keep a distance.
Bert
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