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-   -   Terrestrial Switchoff - sorry to labour the point but... (http://www.homecinemabanter.com/showthread.php?t=72910)

[email protected] March 19th 13 12:52 PM

Terrestrial Switchoff - sorry to labour the point but...
 
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf

NY March 19th 13 02:18 PM

Terrestrial Switchoff - sorry to labour the point but...
 
wrote in message
...
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf


If they switch off terrestrial TV, that means that the only ways to receive
TV will be:

- satellite
- cable
- internet (ASDL or mobile)

Cable and Internet charge subscription fees and, in the case of Internet,
data usage fees once you get beyond an agreed level. Cable is only available
in certain areas (mainly urban).

Satellite requires you to have a dish and limits you to a fixed number of
receivers, in that each receiver (TV, hard disc recorder etc) that wants to
tune to a different channel needs a separate LNB at the dish, because
satellite dishes unlike TV aerials don't supply the full spectrum of
multiplexes simultaneously to the receiver.

None of these are suitable for people who are mobile (canal boats, caravans)
in areas of sparse population where there is no mobile coverage.


Tim+ March 19th 13 02:21 PM

Terrestrial Switchoff - sorry to labour the point but...
 
"NY" wrote:
wrote in message ...


None of these are suitable for people who are mobile (canal boats,
caravans) in areas of sparse population where there is no mobile coverage.


Plenty of caravans, canal boats etc. with satellite dishes.

Tim

Dickie mint[_2_] March 19th 13 02:23 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On 19/03/2013 13:21, Tim+ wrote:
"NY" wrote:
wrote in message ...


None of these are suitable for people who are mobile (canal boats,
caravans) in areas of sparse population where there is no mobile coverage.


Plenty of caravans, canal boats etc. with satellite dishes.

Tim

Couldn't resist posting this:

http://noproblem.org.uk/blog/sky-sat...th-no-problem/

Richard

NY March 19th 13 02:32 PM

Terrestrial Switchoff - sorry to labour the point but...
 
"Tim+" wrote in message
...
"NY" wrote:
wrote in message
...


None of these are suitable for people who are mobile (canal boats,
caravans) in areas of sparse population where there is no mobile
coverage.


Plenty of caravans, canal boats etc. with satellite dishes.


Really? How long does it take from arriving/mooring to being able to point
the dish in the correct direction? And for boats, how precise does the
alignment have to be, given that boats may drift or bob on their moorings?

I only ask because even when we had satellite fitted at our house, it took
the installer a long time to line the dish up correctly after he'd fitted it
and the cables: he was up and down the ladder, tweaking it, for ages. It
doesn't help that dishes are usually fitted so low down (not at chimney
level) so they can't always see over neighbours' roofs.


Tim+ March 19th 13 02:35 PM

Terrestrial Switchoff - sorry to labour the point but...
 
"NY" wrote:
"Tim+" wrote in message
...
"NY" wrote:
wrote in message
...


None of these are suitable for people who are mobile (canal boats,
caravans) in areas of sparse population where there is no mobile coverage.


Plenty of caravans, canal boats etc. with satellite dishes.


Really?


Yes really.

How long does it take from arriving/mooring to being able to point the
dish in the correct direction? And for boats, how precise does the
alignment have to be, given that boats may drift or bob on their moorings?


I think Dickie Mint has answered this much better than I could.


I only ask because even when we had satellite fitted at our house, it
took the installer a long time to line the dish up correctly after he'd
fitted it and the cables: he was up and down the ladder, tweaking it, for
ages. It doesn't help that dishes are usually fitted so low down (not at
chimney level) so they can't always see over neighbours' roofs.


Hmm, maybe a problem with your installer. ;-)

Tim

Peter Duncanson March 19th 13 03:58 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Tue, 19 Mar 2013 13:18:14 -0000, "NY" wrote:

wrote in message
.. .
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf


If they switch off terrestrial TV, that means that the only ways to receive
TV will be:

- satellite
- cable
- internet (ASDL or mobile)

Cable and Internet charge subscription fees and, in the case of Internet,
data usage fees once you get beyond an agreed level. Cable is only available
in certain areas (mainly urban).

Satellite requires you to have a dish and limits you to a fixed number of
receivers, in that each receiver (TV, hard disc recorder etc) that wants to
tune to a different channel needs a separate LNB at the dish, because
satellite dishes unlike TV aerials don't supply the full spectrum of
multiplexes simultaneously to the receiver.


There is no theoretical limit to the number of satellite receivers. A
box called a Multiswitch can feed many receivers from one 4-way LNB.
http://en.wikipedia.org/wiki/Multiswitch

I have three Freesat boxes. Two are recorders with two tuners each and
the third is a single tuner non-recording box. They are fed from an
8-output multiswitch that has input from a 4-way LNB. That means there
are 3 spare outputs. All the outputs from the multiswitch are
independent of one another.

One seller's website:
http://www.satellitesuperstore.com/multiswitch.htm

I understand that some multiswitches can be cascaded.

None of these are suitable for people who are mobile (canal boats, caravans)
in areas of sparse population where there is no mobile coverage.


--
Peter Duncanson
(in uk.tech.digital-tv)

Jim Lesurf[_2_] March 19th 13 04:06 PM

Terrestrial Switchoff - sorry to labour the point but...
 
In article , NY
wrote:


Satellite requires you to have a dish and limits you to a fixed number
of receivers, in that each receiver (TV, hard disc recorder etc) that
wants to tune to a different channel needs a separate LNB at the dish,
because satellite dishes unlike TV aerials don't supply the full
spectrum of multiplexes simultaneously to the receiver.


It is possible to get around this. e.g. use a system like those that put
the outputs from all four onto one optical fibre for distribution around
the home, and have suitable optical receivers for each 'TV' or 'recorder'.
Or do something similar via a computer with a set of tuners feeding 'TVs'
via ethernet. *BUT* this of course all adds to the costs and the work
needed for a home install that is sufficient to avoid more work when
someone wants to add another 'TV' to the home. So not exactly the "poor
man's solution" to loss of DTTV!

The basic problem here is that from a technical / engineering POV all the
problems of losing DTTV access are solvable - if price is no object. BUT in
reality, and in the timescale of the next 2-5 years, for many people the
cost or inconvenience would be high.

So the recent decison and the proposals to go further seem to be based on
applying the H2G2 attitude. "Today is a golden age where no-one will be
unable to access TV if DTTV is removed... well, no-one worth mentioning,
anyway!" I don't see 50 quid and a free filter fixing this.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html


Brian Gaff March 19th 13 06:23 PM

Terrestrial Switchoff - sorry to labour the point but...
 
Well eventually they will get rid of terrestrial I suspect, but maybe they
will keep one channel for emergencies or something.
The real snag with using sats as has been said is that its very much a
fixed receiver thing. I know some ocean liners have it but not your average
trawler!

also, though, if the delivery is via radio waves from a mobile broadband
system, that may well be made cheaper and hence as viable a as the current
freeview.
Who knows. If the sun cuts up rough in the next few years and trashes the
sats, then what.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"NY" wrote in message
...
wrote in message
...
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf


If they switch off terrestrial TV, that means that the only ways to
receive TV will be:

- satellite
- cable
- internet (ASDL or mobile)

Cable and Internet charge subscription fees and, in the case of Internet,
data usage fees once you get beyond an agreed level. Cable is only
available in certain areas (mainly urban).

Satellite requires you to have a dish and limits you to a fixed number of
receivers, in that each receiver (TV, hard disc recorder etc) that wants
to tune to a different channel needs a separate LNB at the dish, because
satellite dishes unlike TV aerials don't supply the full spectrum of
multiplexes simultaneously to the receiver.

None of these are suitable for people who are mobile (canal boats,
caravans) in areas of sparse population where there is no mobile coverage.




Brian Gaff March 19th 13 06:26 PM

Terrestrial Switchoff - sorry to labour the point but...
 
I doubt it will occur till about 7 to ten years down the line though, as
lots of manufacturers want to sell their kit and if people think this is
going to happen they will not sell it will they?

Brian

--
From the Sofa of Brian Gaff Reply address is active
"Jim Lesurf" wrote in message
...
In article , NY
wrote:


Satellite requires you to have a dish and limits you to a fixed number
of receivers, in that each receiver (TV, hard disc recorder etc) that
wants to tune to a different channel needs a separate LNB at the dish,
because satellite dishes unlike TV aerials don't supply the full
spectrum of multiplexes simultaneously to the receiver.


It is possible to get around this. e.g. use a system like those that put
the outputs from all four onto one optical fibre for distribution around
the home, and have suitable optical receivers for each 'TV' or 'recorder'.
Or do something similar via a computer with a set of tuners feeding 'TVs'
via ethernet. *BUT* this of course all adds to the costs and the work
needed for a home install that is sufficient to avoid more work when
someone wants to add another 'TV' to the home. So not exactly the "poor
man's solution" to loss of DTTV!

The basic problem here is that from a technical / engineering POV all the
problems of losing DTTV access are solvable - if price is no object. BUT
in
reality, and in the timescale of the next 2-5 years, for many people the
cost or inconvenience would be high.

So the recent decison and the proposals to go further seem to be based on
applying the H2G2 attitude. "Today is a golden age where no-one will be
unable to access TV if DTTV is removed... well, no-one worth mentioning,
anyway!" I don't see 50 quid and a free filter fixing this.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics
http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html




Geoff Pearson March 19th 13 06:37 PM

Terrestrial Switchoff - sorry to labour the point but...
 

wrote in message
...
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf


If they can't get people to buy enough DAB sets to be able to switch off FM
there will be civil disobedience if they try to switch off DTT.


[email protected] March 19th 13 07:14 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Tue, 19 Mar 2013 17:26:05 -0000, "Brian Gaff"
wrote:

I doubt it will occur till about 7 to ten years down the line though, as
lots of manufacturers want to sell their kit and if people think this is
going to happen they will not sell it will they?

It's a longer timescale than that, and they'll still be selling TV's.

Manufacturers will simply be fitting the appropriate interfaces to
ensure they can meet the upgrade/replacement market.
Already internet connections are being introduced. It's likely that
WiFi/UWB could be included to facilitate distribution of
satellite-derived channels to multiple receivers around the home.

[email protected] March 19th 13 07:31 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Tue, 19 Mar 2013 17:37:09 -0000, "Geoff Pearson"
wrote:


wrote in message
.. .
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf


If they can't get people to buy enough DAB sets to be able to switch off FM
there will be civil disobedience if they try to switch off DTT.


You may think so, but in Germany they are *already* down to 10%
terrestrial reception without any persuation whatever.
Any spectrum changes will have to be consistent across Europe, and I
doubt that the UK will be able to persuade other countries to retain
spectrum for TV if they have no further use for it and want to switch
over to broadband.





Richard Russell March 19th 13 08:02 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Mar 19, 11:52*am, wrote:
"The 694-790 MHz band is expected to become a key band for mobile
broadband"
and references to studies at 470 - 694 MHz.


My reading is that 470-694 MHz is expected to remain allocated to
broadcasting for the foreseeable future, so I don't see it presaging
the end of terrestrial television altogether. They can perhaps
eventually release 694-790 MHz, for example by the increased use of
SFNs and DVB-T2.

Richard.
http://www.rtrussell.co.uk/

David.WE.Roberts March 19th 13 09:16 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Tue, 19 Mar 2013 11:52:33 +0000, nemo wrote:

For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...cfi-mobile-bb/

summary/cfi-mobile-bb.pdf

Try to look at this another way.

The frequencies which are currently being inefficiently allocated to a
single data stream - TV - can be repurposed so that they can carry mobile
data which can, of course, include TV programmes if the user so desires.

So stop being so selfish - the frequencies can be used far more
effectively if they are assigned to mobile operators.

You are all so last decade.

Cheers

Dave R

Bill Wright[_2_] March 19th 13 09:17 PM

Terrestrial Switchoff - sorry to labour the point but...
 
NY wrote:

Plenty of caravans, canal boats etc. with satellite dishes.


Really?

Yes. Go to a canal and use your pretty little peepers.

How long does it take from arriving/mooring to being able to
point the dish in the correct direction?

It takes me about 60 seconds.

And for boats, how precise does
the alignment have to be, given that boats may drift or bob on their
moorings?

Not a problem in reality with inland boats.

I only ask because even when we had satellite fitted at our house, it
took the installer a long time to line the dish up correctly after he'd
fitted it and the cables: he was up and down the ladder, tweaking it,
for ages.

He must have been a moron then.

It doesn't help that dishes are usually fitted so low down
(not at chimney level) so they can't always see over neighbours' roofs.

And being low down they're further from the satellite.

Bill

Bill Wright[_2_] March 19th 13 09:43 PM

Terrestrial Switchoff - sorry to labour the point but...
 
David.WE.Roberts wrote:

You are all so last decade.

Cheers

Dave R

Excuse me young man! I'M last century and proud of it!

Bill

[email protected] March 19th 13 10:27 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Tue, 19 Mar 2013 20:43:06 +0000, Bill Wright
wrote:

David.WE.Roberts wrote:

You are all so last decade.

Cheers

Dave R

Excuse me young man! I'M last century and proud of it!

Yes, but he is absolutely correct.
There is nothing special about TV broadcasting that requires it to
have its own, discrete transport medium. TV is just another bunch of
digits, like all the others.

Richard Russell March 19th 13 11:26 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Mar 19, 9:27*pm, wrote:
There is nothing special about TV broadcasting that requires it to
have its own, discrete transport medium. TV is just another bunch of
digits, like all the others.


The key word there is "broadcasting". You can argue that a
unidirectional 'one source to many destinations' service isn't
necessarily most efficiently delivered using the same transport medium
as bidirectional, point-to-point, services.

Richard.
http://www.rtrussell.co.uk/

Steve Thackery[_2_] March 20th 13 02:05 AM

Terrestrial Switchoff - sorry to labour the point but...
 
Richard Russell wrote:

The key word there is "broadcasting". You can argue that a
unidirectional 'one source to many destinations' service isn't
necessarily most efficiently delivered using the same transport medium
as bidirectional, point-to-point, services.


That's exactly what I would argue. The TCP/IP (or UDP/IP) stack is a
dreadful choice for broadcast of any data, because TCP(UDP)/IP is
designed from the bottom up for point-to-point (client-server)
non-real-time communications.

Using it for one-to-many real-time broadcasting is massively wasteful
and inefficient. Multicasting was bodged on at a later date, but it is
indeed a bodge - it swaps the parallel transmission of the same data
over the same pipes for the transmission of the same data from multiple
sources.

Of course, it can be done, as we all know - point-to-point
voice-over-IP and video-over-IP have been on the go for a long time,
despite the poor match between the data (real time) and the medium
(non-real-time). iPlayer is a great example of how well you can make
that work, despite the unsuitability of the medium. If you throw
enough spare non-real-time bandwidth at the problem, it works well
enough to be effectively real-time.

BUT - putting aside the theoretical niceties ("If we'd known you wanted
broadcast, we'd have designed it differently,"), the fact is that the
internet is all-pervasive and *will* do the job, even if it's a poor
fit. Therefore I reluctantly agree that it does make sense to use the
internet for broadcast, despite the fact that it offends my engineering
sensibilities at every level.

--
SteveT

Woody[_4_] March 20th 13 08:31 AM

Terrestrial Switchoff - sorry to labour the point but...
 
"Steve Thackery" wrote in message
...
Richard Russell wrote:

The key word there is "broadcasting". You can argue that a
unidirectional 'one source to many destinations' service isn't
necessarily most efficiently delivered using the same
transport medium
as bidirectional, point-to-point, services.


That's exactly what I would argue. The TCP/IP (or UDP/IP)
stack is a
dreadful choice for broadcast of any data, because TCP(UDP)/IP
is
designed from the bottom up for point-to-point (client-server)
non-real-time communications.

Using it for one-to-many real-time broadcasting is massively
wasteful
and inefficient. Multicasting was bodged on at a later date,
but it is
indeed a bodge - it swaps the parallel transmission of the same
data
over the same pipes for the transmission of the same data from
multiple
sources.

Of course, it can be done, as we all know - point-to-point
voice-over-IP and video-over-IP have been on the go for a long
time,
despite the poor match between the data (real time) and the
medium
(non-real-time). iPlayer is a great example of how well you
can make
that work, despite the unsuitability of the medium. If you
throw
enough spare non-real-time bandwidth at the problem, it works
well
enough to be effectively real-time.

BUT - putting aside the theoretical niceties ("If we'd known
you wanted
broadcast, we'd have designed it differently,"), the fact is
that the
internet is all-pervasive and *will* do the job, even if it's a
poor
fit. Therefore I reluctantly agree that it does make sense to
use the
internet for broadcast, despite the fact that it offends my
engineering
sensibilities at every level.

--


Yes but....

In practice if the Interweb becomes the medium of delivery surely
two things will happen:-
1. Viewing will drop so dramatically that the broadcasters will
loose so much income they will be unable to continue;
2. Most 'viewers' will probably still watch the same things at
the same time as they always have.

The great advantage of one-to-all - be it terrestrial or
satellite fed - is that it gives structure to viewing which most
people I would suggest find acceptable and/or preferable. OK now
and again there is inconvenience that programmes clash or they
are on when you are out (remember the one about the Irish
VCR.....?) but surely that is why god invented VCRs and PVRs?

Finally, much of this 'drive' for net viewing I would suggest is
coming from personages resident within the M25 which gets all of
the perks more quickly than anywhere else - higher speeds, FFTC
and eventually FTTH, 4G etc - which are not easily available to
the vast majority of the country and certainly not to those who
live off the beaten track. Until such time as some system
architecture is available that can give a clean uncontested feed
of at the very least 2Mb to every home then I would suggest that
net viewing will not take off to any serious extent and that
existing methods will continue.


--
Woody

harrogate three at ntlworld dot com



Graham.[_2_] March 20th 13 10:07 AM

Terrestrial Switchoff - sorry to labour the point but...
 
On Tue, 19 Mar 2013 11:52:33 +0000, lid wrote:

For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf

Please Mr Ofcom, can we have our Bands I & III back?

--
Graham.

%Profound_observation%

[email protected] March 20th 13 11:15 AM

Terrestrial Switchoff - sorry to labour the point but...
 
On Wed, 20 Mar 2013 07:31:55 -0000, "Woody"
wrote:

Yes but....

In practice if the Interweb becomes the medium of delivery surely
two things will happen:-

No-one is saying that! Satellite is there to serve viewers who want
immediate real-time viewing - apart from the minority of those who
can't receive it.

1. Viewing will drop so dramatically that the broadcasters will
loose so much income they will be unable to continue;

What a strange assumption. TV is far too important to the majority of
viewers for them to give up so easily. And satellite and internet
broadcasting are actually cheaper for the broadcaster than terrestrial
transmission.

2. Most 'viewers' will probably still watch the same things at
the same time as they always have.

As has been discussed elsewhere, this old model of TV watching is
rapidly breaking down. People want to watch their own choice of
material at the time that suits them. iPlayer and YourTube are
increasingly popular, especially for the younger generation.

The great advantage of one-to-all - be it terrestrial or
satellite fed - is that it gives structure to viewing which most
people I would suggest find acceptable and/or preferable. OK now
and again there is inconvenience that programmes clash or they
are on when you are out (remember the one about the Irish
VCR.....?) but surely that is why god invented VCRs and PVRs?

Finally, much of this 'drive' for net viewing I would suggest is
coming from personages resident within the M25 which gets all of
the perks more quickly than anywhere else - higher speeds, FFTC
and eventually FTTH, 4G etc - which are not easily available to
the vast majority of the country and certainly not to those who
live off the beaten track. Until such time as some system
architecture is available that can give a clean uncontested feed
of at the very least 2Mb to every home then I would suggest that
net viewing will not take off to any serious extent and that
existing methods will continue.

Yes, satellite will be there for *almost* everyone.

NY March 20th 13 11:33 AM

Terrestrial Switchoff - sorry to labour the point but...
 
wrote in message
...
On Wed, 20 Mar 2013 07:31:55 -0000, "Woody"
2. Most 'viewers' will probably still watch the same things at
the same time as they always have.

As has been discussed elsewhere, this old model of TV watching is
rapidly breaking down. People want to watch their own choice of
material at the time that suits them. iPlayer and YourTube are
increasingly popular, especially for the younger generation.


I never thought I'd admit this, until I got Windows Media Centre on my PC,
which changed my viewing habits. I now very rarely watch anything as it's
broadcast. Even if I do watch nearly-live, I start watching late (if it's a
programme on a channel with commercials) and then skip the commercials as
I'm watching it on time-slip. I've probably not seen a commercial at normal
speed for several years now.

Any programmes that I've recorded to watch later, I pass through VideoReDo
to remove the commercials and continuity spam, especially if it's a
programme I want to keep in my library to watch again and again.


Dickie mint[_2_] March 20th 13 12:11 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On 19/03/2013 13:23, Dickie mint wrote:
On 19/03/2013 13:21, Tim+ wrote:
"NY" wrote:
wrote in message
...


None of these are suitable for people who are mobile (canal boats,
caravans) in areas of sparse population where there is no mobile
coverage.


Plenty of caravans, canal boats etc. with satellite dishes.

Tim

Couldn't resist posting this:

http://noproblem.org.uk/blog/sky-sat...th-no-problem/

Richard


A "Bill" has posted on the Noproblem blog that the page contains errors.
Sue has asked where the errors are. Could "Bill" also post them here?
The blog page was written by a non technical person for other boaters
who asked her to, and who was simply passing on what she'd found to work!

Richard

Roderick Stewart[_3_] March 20th 13 01:21 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Tue, 19 Mar 2013 20:05:05 -0500, "Steve Thackery"
wrote:

The TCP/IP (or UDP/IP) stack is a
dreadful choice for broadcast of any data,

[...]
BUT - putting aside the theoretical niceties ("If we'd known you wanted
broadcast, we'd have designed it differently,"), the fact is that the
internet is all-pervasive and *will* do the job, even if it's a poor
fit. Therefore I reluctantly agree that it does make sense to use the
internet for broadcast, despite the fact that it offends my engineering
sensibilities at every level.


Technological development seems to work like evolution. There's no
central agency that understands it or would have the clout to organise
a complete scrap and re-design, so new things are mindlessly tacked
onto whatever is already there, the motivating force being local
self-interest. Anything that either doesn't work, or works so well
that it expands too rapidly for continued resources to support it will
become extinct.

Rod.

Max Demian March 20th 13 01:30 PM

Terrestrial Switchoff - sorry to labour the point but...
 
"NY" wrote in message
o.uk...
wrote in message
...
On Wed, 20 Mar 2013 07:31:55 -0000, "Woody"
2. Most 'viewers' will probably still watch the same things at
the same time as they always have.

As has been discussed elsewhere, this old model of TV watching is
rapidly breaking down. People want to watch their own choice of
material at the time that suits them. iPlayer and YourTube are
increasingly popular, especially for the younger generation.


I never thought I'd admit this, until I got Windows Media Centre on my PC,
which changed my viewing habits. I now very rarely watch anything as it's
broadcast.

[...]

I've probably not seen a commercial at normal speed for several years now.


Both of those have applied to me since 1988 when I bought my first VCR. And
a fortiori since 1991 when I bought my second (to be used concurrently).

--
Max Demian



Jim Lesurf[_2_] March 20th 13 01:45 PM

Terrestrial Switchoff - sorry to labour the point but...
 
In article , David.WE.Roberts
wrote:
On Tue, 19 Mar 2013 11:52:33 +0000, nemo wrote:


For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...cfi-mobile-bb/

summary/cfi-mobile-bb.pdf


Try to look at this another way.


The frequencies which are currently being inefficiently allocated to a
single data stream - TV - can be repurposed so that they can carry
mobile data which can, of course, include TV programmes if the user so
desires.


So stop being so selfish - the frequencies can be used far more
effectively if they are assigned to mobile operators.


You are all so last decade.


You mean you'll be paying all our mobile charges to watch TV on our
mobiles? How 'mobile' are the ones with a screen bigger than 27 inches?

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html


Bill Wright[_2_] March 20th 13 02:57 PM

Terrestrial Switchoff - sorry to labour the point but...
 
Dickie mint wrote:

Couldn't resist posting this:

http://noproblem.org.uk/blog/sky-sat...th-no-problem/

Richard


A "Bill" has posted on the Noproblem blog that the page contains errors.
Sue has asked where the errors are. Could "Bill" also post them here?
The blog page was written by a non technical person for other boaters
who asked her to, and who was simply passing on what she'd found to work!

Richard

It was me.

The main fault is that the writer was obviously unaware of Freesat, so
she writes as if satellite = Sky and Sky = satellite. So you have to
have a Sky receiver. You have to have a Sky card. You have to pay Sky at
least £20. This is all completely wrong. People who don't want to
subscribe to Sky are much better off getting a normal Freesat box. If
they get a Freesat recorder they can watch their stash of programmes
where there's no dish signal. A Sky box will only play back if it's
getting permission from Sky all the time via the dish. This is important
for boaters because it can save erecting the dish.

Quote: "The biggest problem is that Sky program the digibox with the
regional programs that are at the address where you had the card sent
to!!" A Freesat box lets you alter the channel list by simply putting in
a different post code.

She says she has a 12V Sky box. Yes, these are available but often at a
stupid price, and running them from the spike-infested 12V boat supply
is asking for trouble. Far better to have a small inverter (ideally a
pure sine wave one), then you can use any receiver or recorder you like.
Most boats these days have an inverter anyway.

A major howler: "Some dishes come with the correct angle set from the
vertical…. … the first time you set up will take a little patience, but
once that angle is set you will never have to change it again." yet she
lists her travels as being all over the UK. The elevation angle varies
very significantly across the country.

Lining the dish up as described by means of a Skybox is a bit of a
pantomime! No mention of the small cheap meters that are available, some
of which now give the satellite ident.

Bill


Dickie mint[_2_] March 20th 13 04:31 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On 20/03/2013 13:57, Bill Wright wrote:
Dickie mint wrote:

Couldn't resist posting this:

http://noproblem.org.uk/blog/sky-sat...th-no-problem/

Richard


A "Bill" has posted on the Noproblem blog that the page contains errors.
Sue has asked where the errors are. Could "Bill" also post them here?
The blog page was written by a non technical person for other boaters
who asked her to, and who was simply passing on what she'd found to work!

Richard

It was me.

The main fault is that the writer was obviously unaware of Freesat, so
she writes as if satellite = Sky and Sky = satellite. So you have to
have a Sky receiver. You have to have a Sky card. You have to pay Sky at
least £20. This is all completely wrong. People who don't want to
subscribe to Sky are much better off getting a normal Freesat box. If
they get a Freesat recorder they can watch their stash of programmes
where there's no dish signal. A Sky box will only play back if it's
getting permission from Sky all the time via the dish. This is important
for boaters because it can save erecting the dish.

Quote: "The biggest problem is that Sky program the digibox with the
regional programs that are at the address where you had the card sent
to!!" A Freesat box lets you alter the channel list by simply putting in
a different post code.

She says she has a 12V Sky box. Yes, these are available but often at a
stupid price, and running them from the spike-infested 12V boat supply
is asking for trouble. Far better to have a small inverter (ideally a
pure sine wave one), then you can use any receiver or recorder you like.
Most boats these days have an inverter anyway.

A major howler: "Some dishes come with the correct angle set from the
vertical…. … the first time you set up will take a little patience, but
once that angle is set you will never have to change it again." yet she
lists her travels as being all over the UK. The elevation angle varies
very significantly across the country.

Lining the dish up as described by means of a Skybox is a bit of a
pantomime! No mention of the small cheap meters that are available, some
of which now give the satellite ident.

Bill


Be gentle with her! Her blogs are very interesting and amusing. The
problem is that the page was written pre Freesat, around 2003 I think,
and she hasn't updated it.
With a suggestion of how it should read, she probably will!

Richard

Steve Thackery[_2_] March 20th 13 04:54 PM

Terrestrial Switchoff - sorry to labour the point but...
 
Woody wrote:

Yes but....


Actually I should have made something much clearer: if I were God I
wouldn't use the internet for broadcast; I'd use satellite for
broadcast and use the Internet for on-demand services.

I really should have said that I understand the argument for freeing up
the RF terrestrial spectrum, which you can do by providing broadcast
services over the Internet or over satellite. And although the former
will work, the latter makes much more sense.

Without broadcast material the Internet will have lots more bandwidth
for doing the stuff it is good at (delivery of user-specific services).

I'm sorry for the last sentence in my previous post - in retrospect it
doesn't properly reflect my views.

Point for pedants: apparently we should always capitalise "Internet"
because there's only one and it is a proper noun. And, of course,
"Interweb" isn't a proper term (I know Woody knows that). I first
heard it when Jools Holland kept saying it on his programme. Why does
he think it "clever" or "cool" to deliberately flaunt his ignorance?

On this topic, I'm amazed at how many people conflate "the web" (or
"the World Wide Web) with "the Internet". Indeed, many people I've
explained it to insist I'm wrong, and that "the web" is just another
name for "the Internet".

I've even heard people say that Tim Berners-Lee invented the Internet!

--
SteveT

Roderick Stewart[_3_] March 20th 13 06:13 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Wed, 20 Mar 2013 10:54:35 -0500, "Steve Thackery"
wrote:

Actually I should have made something much clearer: if I were God I
wouldn't use the internet for broadcast; I'd use satellite for
broadcast and use the Internet for on-demand services.


If you were God you wouldn't need either. You'd just say "Let there be
broadcast", and there would be broadcast, and you would see that it
was good.

And on the seventh day you'd rest, and watch some of the programmes,
and realise it wasn't so good after all.

Rod.

Bill Wright[_2_] March 20th 13 08:33 PM

Terrestrial Switchoff - sorry to labour the point but...
 
Dickie mint wrote:

Be gentle with her! Her blogs are very interesting and amusing. The
problem is that the page was written pre Freesat, around 2003 I think,
and she hasn't updated it.
With a suggestion of how it should read, she probably will!

Richard

Tell her if she re-writes it I'll check it for her.

Bill

Stephen[_6_] March 21st 13 04:46 PM

Terrestrial Switchoff - sorry to labour the point but...
 

wrote in message
...
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf


If they sold off the whole of UHF, we could go back using VHF for TV if we
just forgot about the regional news. Freeview only needs 6 channels for
single frequency networks and these 6 should be available on VHF Bands I and
III.

Only the regional TV variations need to be relegated to satellite, cable &
internet.

The VHF bands are much less attractive to mobile phone operators because of
the much longer aerials required (particularly for Band I) but they are
perfectly good for terrestrial TV, and a new VHF TV aerial would be cheaper
than a dish, and much easier to align. We might return to the days of H
aerials, X aerials and Band III Yagis, but with digital TV on VHF instead of
405 lines.



Steve Thackery[_2_] March 21st 13 04:53 PM

Terrestrial Switchoff - sorry to labour the point but...
 
Roderick Stewart wrote:

If you were God you wouldn't need either. You'd just say "Let there be
broadcast", and there would be broadcast, and you would see that it
was good.

And on the seventh day you'd rest, and watch some of the programmes,
and realise it wasn't so good after all.


Hah! Nice one.

--
SteveT

Ian Jackson[_2_] March 21st 13 05:49 PM

Terrestrial Switchoff - sorry to labour the point but...
 
In message , Stephen
writes

wrote in message
.. .
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.


http://stakeholders.ofcom.org.uk/bin...fi-mobile-bb/s
ummary/cfi-mobile-bb.pdf


If they sold off the whole of UHF, we could go back using VHF for TV if we
just forgot about the regional news. Freeview only needs 6 channels for
single frequency networks and these 6 should be available on VHF Bands I and
III.

Only the regional TV variations need to be relegated to satellite, cable &
internet.

The VHF bands are much less attractive to mobile phone operators because of
the much longer aerials required (particularly for Band I) but they are
perfectly good for terrestrial TV, and a new VHF TV aerial would be cheaper
than a dish, and much easier to align. We might return to the days of H
aerials, X aerials and Band III Yagis, but with digital TV on VHF instead of
405 lines.

VHF (especially Band 1) is not best suited to off-air multi-channel TV.

For a start, Band 1 is very prone to long-range sporadic-E interference
in the late spring and early summer. Even well before the advent of
digital transmissions, many European countries had ceased TV on Band 1
because of such problems.

Then there's the problem of designing aerials with sufficient bandwidth
vs gain. OK, the Americans have such things, but they are generally used
for the reception of relatively strong downtown transmissions. I'm not
sure how good those used in Europe are (or used to be). I can't remember
if (for example) Band 3 aerials, covering the whole of 175 to 230MHz,
were very common.

There are only eight or nine 8MHz VHF TV channels available (3 in Band 1
and 6 or 7 in Band 3) - and it would be extremely difficult
comprehensively to provide the whole of UK with 6 digital MUXes in the
same way as the two analogue channels were provided. At best, the full 6
MUXes could probably only be provided in well-separated centres of large
populations. Elsewhere, the number of channels would have to be reduced.
Although this is not dissimilar to what happens at present, I feel that
the situation would be much more marked than we have at UHF.
--
Ian

Bill Wright[_2_] March 21st 13 05:58 PM

Terrestrial Switchoff - sorry to labour the point but...
 
Stephen wrote:

The VHF bands are much less attractive to mobile phone operators because of
the much longer aerials required (particularly for Band I) but they are
perfectly good for terrestrial TV, and a new VHF TV aerial would be cheaper
than a dish, and much easier to align. We might return to the days of H
aerials, X aerials and Band III Yagis, but with digital TV on VHF instead of
405 lines.



I doubt if the aerials would be that elaborate. With no ghosting to
worry about and the ability of DTT to work with a low s/n ratio I should
think the aerials would mostly be in the loft, and would be simple
dual-band omni types. An SFN would probably be VP.

Bill

Bill Wright[_2_] March 21st 13 06:08 PM

Terrestrial Switchoff - sorry to labour the point but...
 
Ian Jackson wrote:


Then there's the problem of designing aerials with sufficient bandwidth
vs gain. OK, the Americans have such things, but they are generally used
for the reception of relatively strong downtown transmissions. I'm not
sure how good those used in Europe are (or used to be). I can't remember
if (for example) Band 3 aerials, covering the whole of 175 to 230MHz,
were very common.

Log periodics.

http://www.wrightsaerials.tv/aerialp...ngus/005.shtml

Half a log is better than no log at all:
http://www.wrightsaerials.tv/aerialp...ngus/007.shtml

Bill

Peter Duncanson March 21st 13 06:09 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Thu, 21 Mar 2013 15:46:01 -0000, "Stephen"
wrote:


wrote in message
.. .
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.

http://stakeholders.ofcom.org.uk/bin...-mobile-bb.pdf


If they sold off the whole of UHF, we could go back using VHF for TV if we
just forgot about the regional news. Freeview only needs 6 channels for
single frequency networks and these 6 should be available on VHF Bands I and
III.

Only the regional TV variations need to be relegated to satellite, cable &
internet.

The VHF bands are much less attractive to mobile phone operators because of
the much longer aerials required (particularly for Band I) but they are
perfectly good for terrestrial TV, and a new VHF TV aerial would be cheaper
than a dish, and much easier to align. We might return to the days of H
aerials, X aerials and Band III Yagis, but with digital TV on VHF instead of
405 lines.


Hmm...

"Yes Sir/Madam. I know you have an old VHF aerial on your chimney, but
it's pointing in the wrong direction. Anyway, you need a High Definition
Digital VHF aerial."

--
Peter Duncanson
(in uk.tech.digital-tv)

[email protected] March 21st 13 07:33 PM

Terrestrial Switchoff - sorry to labour the point but...
 
On Thu, 21 Mar 2013 16:49:37 +0000, Ian Jackson
wrote:

In message , Stephen
writes

wrote in message
. ..
For those who haven't yet seen the Ofcom consultation on future mobile
broadband spectrum.

"The 694-790 MHz band is expected to become a key band for mobile
broadband"

and references to studies at 470 - 694 MHz.


http://stakeholders.ofcom.org.uk/bin...fi-mobile-bb/s
ummary/cfi-mobile-bb.pdf


If they sold off the whole of UHF, we could go back using VHF for TV if we
just forgot about the regional news. Freeview only needs 6 channels for
single frequency networks and these 6 should be available on VHF Bands I and
III.

Only the regional TV variations need to be relegated to satellite, cable &
internet.

The VHF bands are much less attractive to mobile phone operators because of
the much longer aerials required (particularly for Band I) but they are
perfectly good for terrestrial TV, and a new VHF TV aerial would be cheaper
than a dish, and much easier to align. We might return to the days of H
aerials, X aerials and Band III Yagis, but with digital TV on VHF instead of
405 lines.

VHF (especially Band 1) is not best suited to off-air multi-channel TV.

For a start, Band 1 is very prone to long-range sporadic-E interference
in the late spring and early summer. Even well before the advent of
digital transmissions, many European countries had ceased TV on Band 1
because of such problems.

I don't think anyone would want to go back to TV in Band I for that
very reason, however Band III would be suitable if the DAB channels
could be recovered. Now *there's* an idea!


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