[philyb]

if they added multiplex 7 to freeview they could move the hd channels to this multiplex and give multiplex b back for sd channels.

they could even create multiplex 8 for more hd channels. this can be done.

[lstar337]

Originally Posted by philyb

if they added multiplex 7 to freeview they could move the hd channels to this multiplex and give multiplex b back for sd channels.

they could even create multiplex 8 for more hd channels. this can be done.

Sure, because magic exists.

[philyb]

with more space they wouldnt need to cram so many channels and affect picture quality

[kasg]

Originally Posted by philyb

with more space they wouldnt need to cram so many channels and affect picture quality

Yes, but where do you propose to conjure up the space from?

[Spot]

What you suggest were possibilities before it became likely (though still not certain) that the part of the UHF band above 700Mhz will be cleared to be sold off.

If that comes to pass, it is now likely that most of the spare capacity lower down (basically UHF channels 31 to 37) will be needed to accomodate existing services displaced by the clearance. There might still be some additional capacity found, but it is now much less likely.

[DragonQ]

lol @ thinking quality will ever increase. If 2 new multiplexes were added, you can be sure they'd be filled with more and more useless channels, rather than used to boost the quality of the existing ones.

[kasg]

Originally Posted by Spot

If that comes to pass, it is now likely that most of the spare capacity lower down (basically UHF channels 31 to 37) will be needed to accomodate existing services displaced by the clearance. There might still be some additional capacity found, but it is now much less likely.

A 700MHz clearance would surely put the pressure on to move to DVB-T2. I think the push for this has to start NOW, the sooner non-DVB-T2 equipment is phased out, the better.

[Spot]

Originally Posted by kasg

A 700MHz clearance would surely put the pressure on to move to DVB-T2. I think the push for this has to start NOW, the sooner non-DVB-T2 equipment is phased out, the better.

Yes I am sure that would be part of the plan, and the COM muxs (at least) would have to be run as single frequency networks, either regionally or nationally.

This is what they have in mind if you haven't seen it already.

http://stakeholders.ofcom.org.uk/bin...egy/arqiva.pdf

[AxG]

Originally Posted by philyb

if they added multiplex 7 to freeview they could move the hd channels to this multiplex and give multiplex b back for sd channels.

they could even create multiplex 8 for more hd channels. this can be done.

So remove HD channels from relays? Not really sensible.
Or just use multiplex 7 for SD channels.

But as others have said unlikely

[Dansky+HD]

Originally Posted by philyb

if they added multiplex 7 to freeview they could move the hd channels to this multiplex and give multiplex b back for sd channels.

they could even create multiplex 8 for more hd channels. this can be done.

I'm in favour if this would create space for more HD channels.

Id prefer 15 FULL HD channels over 150 SD.

[seafra]

1 SD channel = 10 SD channels ?

If that's the case I would rather have a mixture
10 HD and the rest SD but with no +1 channels .

But there is no chance of this.

[Muzer]

No - the biggest HD mux has 5 HD channels. The biggest SD mux (that can be received by SD receivers) currently has 12 SD channels. You could fit more SD channels into the HD mux - I'd hazard a guess of up to 20 if you really squeezed them in - but then they'd only be able to be received on HD receivers.

[DragonQ]

Nah a DVB-T2 mux using AVC could fit 20 SD channels quite comfortably. Quality would be higher than most Freeview channels now.

[joshua_welby]

What about the new Compression Technology?
www.hevc.info/

[DragonQ]

Yes, if they adopted that, it'd roughly double the efficiency. So 40 SD channels or 10 HD channels per DVB-T2 multiplex.

If they ever did switch the system so that all multiplexes were DVB-T2, they should switch to HEVC at the same time. However, HEVC is a few years away from being ready to be in mass market set top boxes yet.

[figrin_dan]

Originally Posted by DragonQ

lol @ thinking quality will ever increase. If 2 new multiplexes were added, you can be sure they'd be filled with more and more useless channels, rather than used to boost the quality of the existing ones.

I think you mean more and more money making opportunities.