BBC Confirmation of new HD services
 

On Fri, 13 Dec 2013 11:36:15 +0000, lid wrote:

Allow me to correct your last paragraph:

Maybe in
about 10 years time[not 25]

:-) Who knows, you could be right.

Rod.

BBC Confirmation of new HD services
 

charles wrote:

there have been other, less publicised, moves with similar results


Please tell.

Bill

BBC Confirmation of new HD services
 

Martin wrote:

Next they will invent communication satellites to avoid laying miles of
broadband cables to remote places.

The problem, surely, is that the satellites would be constantly moving
across the sky, and for much of the time would be over the horizon.
Possibly a whole sequence of satellites, on the same orbit but equally
spaced out along it, could be used. The receive aerials would have to
have a very broad forward lobe even so, and that implies that the
transmissions would have to be at 300MHz or below. Either that or the
transmissions would need to be extremely high powered to make up for the
poor receive aerial gain.

I really think the whole idea is a non-starter. No, in my opinion the
future lies with transmissions from aircraft or balloons.

Bill

BBC Confirmation of new HD services
 

Mark Carver wrote:

That's a good idea, and then I suppose you could carry every regional
version of a channel, and choose to watch whatever version you like,
regardless of location.


No, there isn't the bandwidth. Each TV channel needs 8MHz remember.

Bill

BBC Confirmation of new HD services
 

charles wrote:

Remember that main stations, like Bilsdale, sterilise the use of the their
frequencies for hundreds of miles. We couldn't have had a 5 (or even 6)
channel service covering the entire country if regional tv had been
considered.

Who does that square with cellular networks?


I once had an idiot complain that living only 20 miles from the capital of
Scotland he could get a tv signal. I had great pleasure in telling him
that when our forbears picked Edinburgh as their capital city, they hadn't
considered television reception in the Moorfoot Hills 600 years later as a
priority.


I once had an idiot customer, a chiropodist who'd moved from Aberdeen to
the bottom of Kilnhurst where TV signals don't really penetrate. He was
indignant. "I had perfect reception in Aberdeen and that's much further
from London!"

Bill

BBC Confirmation of new HD services
 

wrote:
On Fri, 13 Dec 2013 15:31:54 +0000, Bill Wright
wrote:

Martin wrote:

Next they will invent communication satellites to avoid laying miles of
broadband cables to remote places.
The problem, surely, is that the satellites would be constantly moving
across the sky, and for much of the time would be over the horizon.
Possibly a whole sequence of satellites,
I really think the whole idea is a non-starter. No, in my opinion the
future lies with transmissions from aircraft or balloons.

Bill

Didn't work well for this lot.
http://www.marinebroadcasters.com/la...rope_radio.htm

G.Harman

Yes but they were rank amateurs. I'm sure if the BBC asked Arqiva to do
it the result would be excellent.

Bill

BBC Confirmation of new HD services
 

On 13/12/2013 15:33, Bill Wright wrote:
Mark Carver wrote:

That's a good idea, and then I suppose you could carry every regional
version of a channel, and choose to watch whatever version you like,
regardless of location.


No, there isn't the bandwidth. Each TV channel needs 8MHz remember.

Oh that's easy, just throw away most of the detail in the signal, plenty
of room.


--
Mark
Please replace invalid and invalid with gmx and net to reply.

BBC Confirmation of new HD services
 

On Fri, 13 Dec 2013 14:59:44 +0000, Roderick Stewart
wrote:

except that "broadcasting" is an efficent ay of getting programmes to the
customers. If everybody had their own dedicated "line" to some master
computer that would be very inefficient.

That's the way it's going though. While it might be inefficient to
plan a broadcasting system on the basis of individual connections, if
such a system or its equivalent is already there, even if it was put
in place for other purposes, then if it also happens to be capable of
handling broadcasting services it makes perfect sense to use it. From
the customers' point of view it makes no sense to have two different
sets of equipment, one for communications and one for entertainment,
if one can do the lot.

I've got one fork for digging the garden and another for eating my dinner.
Would you advocate I throw one away and use the other for both tasks?

BBC Confirmation of new HD services
 

Mark Carver wrote:
On 13/12/2013 15:33, Bill Wright wrote:
Mark Carver wrote:

That's a good idea, and then I suppose you could carry every regional
version of a channel, and choose to watch whatever version you like,
regardless of location.


No, there isn't the bandwidth. Each TV channel needs 8MHz remember.

Oh that's easy, just throw away most of the detail in the signal, plenty
of room.

Would this not be a good time to re-introduce System A?

Bill

BBC Confirmation of new HD services
 

Paul Ratcliffe wrote:

I've got one fork for digging the garden and another for eating my dinner.
Would you advocate I throw one away and use the other for both tasks?

How big's tha gob?

Bill