[opendtv] Re: BBC Demonstrates HDTV Broadcasts over SD Channels
- From: "John Willkie" <JohnWillkie@xxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Tue, 21 Jun 2005 17:04:12 -0700
interlineations in-line
----- Original Message -----
From: "Alan Roberts" <roberts.mugswell@xxxxxxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Tuesday, June 21, 2005 12:03 PM
Subject: [opendtv] Re: BBC Demonstrates HDTV Broadcasts over SD Channels
> I've been lurking here for many years :-)
>
> 1: UK has already got the digital transition, it's doing very well.
>
> 2: HDTV is going to happen in Europe pretty soon. Regular transmissions
have
> been happening here for over 2 years.
terrestrial? regular transmissions of HDTV have been happening in the US
since 1993 or so.
>
> 3: Sky starts in less than a year and will have significant competition
from
> Day #1 or before.
>
And, DirecTV and Echostar have been engaging in HDTV transmission for almost
5 years because of terrestrial HDTV. So, Sky will only be 6-7 years behind.
> 4: The BBC demo isn't a kludge, it's a simple means of using spare
> bandwidth, there can't be anything wrong with that. It was developed
because
> it's a good idea. Even when we've got full HD broadcasting, it could still
> be a useful way to get non-SD signals out over the existing SD network at
no
> cost.
>
Here's an idea: use the spare bandwidth for real-time HDTV. I agree that
there is nothing wrong with kludges if that's all that you can do. I
thought there were all sorts of interactive services that were going to clog
up the available bandwidth.
> 5: There's nothing in the DVB regulations to forbid it, it's a data
stream.
>
Agreed. It's the licensing model that's at fault; in DVB countries, the
spec was used to rob broadcasters of their bandwidth (no exceptions, even
Australia, although with a different twist). DVB also lacks the infamous
table 3, which is not legally enforceable in the U.S.
> 6: It works, I've seen it. Full 1080i/25 and 720p/50 broadcast over a cctv
> Freeview system.
>
Me, I saw something with more frames and the same or better spatial specs in
1987.
> 7: There's no bargaining involved. It was developed because somebody
thought
> it a good idea, which it is. It isn't BBC policy. Yet. It could be, who
> knows, and why not?
>
Because it will only take some of the pressure off of the -- pardon my
French -- need for HDTV.
> 8: I can't second guess the BBC's policy on launching HD, or at least I'm
> not prepared to tell you what I know and what I suspect, because I still
> have some NDAs dangling. If you wish to make guesses, carry on by all
means.
> But don't regard this store/forward/store system as an alternative to
> broadcast HD, because nobody's suggesting it is. It's only a demonstration
> of what can be done.
>
Okay, but HDTV could also be sent via email or usenet to compete with it
(and has been done for some years now). I tend to think of broadcasting
being about "the shock of the new" with the emphasis on "NOW", not "will
arrive in due course."
John Willkie
>
> ----- Original Message -----
> From: "John Willkie" <JohnWillkie@xxxxxxxxxxxxx>
> To: <opendtv@xxxxxxxxxxxxx>
> Sent: Tuesday, June 21, 2005 7:10 PM
> Subject: [opendtv] Re: BBC Demonstrates HDTV Broadcasts over SD Channels
>
>
> > Sorry, Alan, I was treading upon previous posts of mine, perhaps before
> you
> > got on the list or rose up from lurkerdom.
> >
> > To have HDTV, DVB countries (with the exception of Australia, where the
> > issue was indentified and prevented) will need to have two transitions
up
> > from analog. The first, which we're being told is well advance of the
US
> > one, is to DTV transmission systems. The second is to HDTV. The only
> hope
> > to avoid the second is if in the meantime, there is a second DTV
> transition
> > in the regions where HDTV is common now, to 2K or whatever comes next.
> >
> > What's wrong with it is that it's a kludge.
> >
> > It's not the BBC that is in denial. It's the DVB common practices and
the
> > regulators.
> >
> > How reasonable a simulation of HDTV over transport streams do you think
> that
> > store and forward HDTV is ? (forgive the dangling participle.) Sounds
> to
> > me like a "resistance is futile" marketing ploy, barganing to avoid
doing
> > what really needs to be done.
> >
> > John Willkie
>
>
>
>
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