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Digital switchover HD plans
When the analogue signal has been switched off in a given region, e.g.
Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use so that the regions that switchover first will get for example the BBC HD channel before the other regions? -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
"DAB sounds worse than FM" [email protected] wrote in message ... When the analogue signal has been switched off in a given region, e.g. Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use so that the regions that switchover first will get for example the BBC HD channel before the other regions? -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php I stand to be corrected but as far as I can determine there are currently NO FIRM PLANS to introduce HD on any channel - at least as a free-to-air service. Worse still, there is the very real prospect that the freed-up bandwidth is going to be flogged off to the highest bidder - which may not be for Telly purposes at all. Chas |
Digital switchover HD plans
"DAB sounds worse than FM" [email protected] wrote in message ... When the analogue signal has been switched off in a given region, e.g. Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use ..... Might have, as I understand it will depend which particular transmitter you recieve. Some will indeed be 6 muxes, but others 5, 4 or even 3 muxes. -- Regards, David Please reply to News Group |
Digital switchover HD plans
Chas Gill wrote:
"DAB sounds worse than FM" [email protected] wrote in message ... When the analogue signal has been switched off in a given region, e.g. Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use so that the regions that switchover first will get for example the BBC HD channel before the other regions? -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php I stand to be corrected but as far as I can determine there are currently NO FIRM PLANS to introduce HD on any channel - at least as a free-to-air service. The BBC management has asked the BBC Trust for permission to launch the BBC HD channel permanently, so it should be freely available via satellite if nothing else. Worse still, there is the very real prospect that the freed-up bandwidth is going to be flogged off to the highest bidder - which may not be for Telly purposes at all. They could provide HD versions of all of the "big 5" channels at a push if they wanted to after digital switchover. Also, if the broadcasters were given all of the "Digital Dividend" spectrum we'd only get a handful more HD channels, so Freeview would always be very limited in the number of HD channels that could ever be available. The only solution is to adopt DVB-T2, which should double the capacity and allow quite a lot of HD channels to be transmitted, and I dare say that if they were given all of the rest of the spectrum then the chances of us using DVB-T2 would diminish, and they'd just sit back on their laurels to avoid putting people to the expense of having to upgrade their aerials with the threat that that would bring of people possibly losing people to Sky. Basically, they should do what's in the best interests of the public rather than what's in the best interests of themselves for a change, but we'll never see the BBC do that! -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
David wrote:
"DAB sounds worse than FM" [email protected] wrote in message ... When the analogue signal has been switched off in a given region, e.g. Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use ..... Might have, as I understand it will depend which particular transmitter you recieve. Some will indeed be 6 muxes, but others 5, 4 or even 3 muxes. Okay. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
On May 12, 3:10 pm, "David" wrote:
Might have, as I understand it will depend which particular transmitter you recieve. Some will indeed be 6 muxes, but others 5, 4 or even 3 muxes. Only the existing 80 DTT sites will carry all six SD muxes after DSO, with one addition, Fremont Point on Jersey. The remaining 1074 transmitters will only carry three SD muxes. There are about 100 sites licenced to carry two extra muxes, these might or might not appear, and might or might not carry HD. |
Digital switchover HD plans
Mark Carver wrote:
On May 12, 3:10 pm, "David" wrote: Might have, as I understand it will depend which particular transmitter you recieve. Some will indeed be 6 muxes, but others 5, 4 or even 3 muxes. Only the existing 80 DTT sites will carry all six SD muxes after DSO, with one addition, Fremont Point on Jersey. The remaining 1074 transmitters will only carry three SD muxes. There are about 100 sites licenced to carry two extra muxes, these might or might not appear, and might or might not carry HD. It's so hypocritical that they're holding out the begging bowl for the spectrum yet they can't even be bothered to extend the coverage of the other 3 multiplexes from the current 73%. They deserve to be given nothing, IMO. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
In article ,
DAB sounds worse than FM [email protected] wrote: Mark Carver wrote: On May 12, 3:10 pm, "David" wrote: Might have, as I understand it will depend which particular transmitter you recieve. Some will indeed be 6 muxes, but others 5, 4 or even 3 muxes. Only the existing 80 DTT sites will carry all six SD muxes after DSO, with one addition, Fremont Point on Jersey. The remaining 1074 transmitters will only carry three SD muxes. There are about 100 sites licenced to carry two extra muxes, these might or might not appear, and might or might not carry HD. It's so hypocritical that they're holding out the begging bowl for the spectrum yet they can't even be bothered to extend the coverage of the other 3 multiplexes from the current 73%. It's not "can't be bothered", It's "don't want to spend the (quite considerable) sum of money needed". -- From KT24 - in "Leafy Surrey" Using a RISC OS computer running v5.11 |
Digital switchover HD plans
On May 12, 5:11 pm, "DAB sounds worse than FM" [email protected] wrote:
Mark Carver wrote: It's so hypocritical that they're holding out the begging bowl for the spectrum yet they can't even be bothered to extend the coverage of the other 3 multiplexes from the current 73%. They deserve to be given nothing, IMO. It's the PSBs (notably the Beeb) holding out the begging bowl, and they're equipping all 1154 sites for SD. Actually because the existing 80 sites will employ significantly higher power after DSO, that 73% figure will rise to 90%. The remaining 1074 sites will account for 9.9 ish % coverage. The COM mux operators have decided it's not economically viable to extend any further. The PSB operators (BBC, ITV, C4, 5 etc) are obliged to provide 99ish % coverage. Same situation with analogue radio, compare the number of FM transmitters used for BBC R1-4, with the number equipped for Classic FM. |
Digital switchover HD plans
"Mark Carver" wrote in message ups.com... Same situation with analogue radio, compare the number of FM transmitters used for BBC R1-4, with the number equipped for Classic FM. Yes and surprising how well they cover us with Classic in that case. I would ask have we too many BBC FM? My dial is full of duplicate BBC . -- Regards, David Please reply to News Group |
Digital switchover HD plans
"David" wrote in message
"Mark Carver" wrote in message ups.com... Same situation with analogue radio, compare the number of FM transmitters used for BBC R1-4, with the number equipped for Classic FM. Yes and surprising how well they cover us with Classic in that case. I would ask have we too many BBC FM? My dial is full of duplicate BBC . Either you live in an area between many transmitters, or you have a very sensitive FM tuner. -- Max Demian |
Digital switchover HD plans
In article ,
David wrote: "Mark Carver" wrote in message ups.com... Same situation with analogue radio, compare the number of FM transmitters used for BBC R1-4, with the number equipped for Classic FM. Yes and surprising how well they cover us with Classic in that case. I would ask have we too many BBC FM? My dial is full of duplicate BBC . That is because VHF/FM transmitters, because of the frequency band they use, are not very directional. Signal also can carry a very long way, so that, in the absence of inteference, they 'pop up' over the dial. Services targetted at particular areas do overspill into others, Where I live I can identify Wrotham, Guildford, Crystal Palace, Oxford & Rowridge, although only only the first 2 are useable. I can only use a portable on Guildford, Wrotham has too much multipath. -- From KT24 - in "Leafy Surrey" Using a RISC OS computer running v5.11 |
Digital switchover HD plans
"Max Demian" wrote in message ... "David" wrote in message Either you live in an area between many transmitters, or you have a very sensitive FM tuner. FM used by our portable radio with telescopic aerial and the car radio. Live in West Yorkshire, many, many duplications of BBC Radio2 etc. BBC Radio Leeds 2 or maybe 3. If they were reduced in number and engineered as the Independents what a lot more station we could have. -- Regards, David Please reply to News Group |
Digital switchover HD plans
In article ,
David wrote: "Max Demian" wrote in message ... "David" wrote in message Either you live in an area between many transmitters, or you have a very sensitive FM tuner. FM used by our portable radio with telescopic aerial and the car radio. Live in West Yorkshire, many, many duplications of BBC Radio2 etc. BBC Radio Leeds 2 or maybe 3. If they were reduced in number and engineered as the Independents what a lot more station we could have. and what a lot of people would lose their BBC services -- From KT24 - in "Leafy Surrey" Using a RISC OS computer running v5.11 |
Digital switchover HD plans
charles wrote:
In article , DAB sounds worse than FM [email protected] wrote: Mark Carver wrote: On May 12, 3:10 pm, "David" wrote: Might have, as I understand it will depend which particular transmitter you recieve. Some will indeed be 6 muxes, but others 5, 4 or even 3 muxes. Only the existing 80 DTT sites will carry all six SD muxes after DSO, with one addition, Fremont Point on Jersey. The remaining 1074 transmitters will only carry three SD muxes. There are about 100 sites licenced to carry two extra muxes, these might or might not appear, and might or might not carry HD. It's so hypocritical that they're holding out the begging bowl for the spectrum yet they can't even be bothered to extend the coverage of the other 3 multiplexes from the current 73%. It's not "can't be bothered", It's "don't want to spend the (quite considerable) sum of money needed". I was under the impression that transmitters grew from magic beanstalk beans and it's free to provide 110% population coverage. I stand corrected. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
"charles" wrote in message and what a lot of people would lose their BBC services -- Not round here. If some did then an aerial would cure that. -- Regards, David Please reply to News Group |
Digital switchover HD plans
Mark Carver wrote:
On May 12, 5:11 pm, "DAB sounds worse than FM" [email protected] wrote: Mark Carver wrote: It's so hypocritical that they're holding out the begging bowl for the spectrum yet they can't even be bothered to extend the coverage of the other 3 multiplexes from the current 73%. They deserve to be given nothing, IMO. It's the PSBs (notably the Beeb) holding out the begging bowl, and they're equipping all 1154 sites for SD. It's still a bloody begging bowl. And ask yourself why they want the spectrum. It's for their own bloody benefit, so why can't they bid for it in an auction like everybody else? What's fairer than an auction? Actually because the existing 80 sites will employ significantly higher power after DSO, that 73% figure will rise to 90%. Right, so they can provide the "big 5" channels in HD to 90% of the country. Basically, they want the extra spectrum to launch all or most of their own channels in HD, so that keeps the status quo on Freeview where they get the lion's share of the audiences, and I bet we'd never see DVB-T2 implemented, which is the only way we're going to see a wide range of HD channels on Freeview. The remaining 1074 sites will account for 9.9 ish % coverage. The COM mux operators have decided it's not economically viable to extend any further. The PSB operators (BBC, ITV, C4, 5 etc) are obliged to provide 99ish % coverage. Five won't be available to the 9.9% if the Digital UK website is correct. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
"DAB sounds worse than FM" [email protected] wrote in message ... The remaining 1074 sites will account for 9.9 ish % coverage. The COM mux operators have decided it's not economically viable to extend any further. The PSB operators (BBC, ITV, C4, 5 etc) are obliged to provide 99ish % coverage. Five won't be available to the 9.9% if the Digital UK website is correct. Don't Five get less coverage than the big 4 now on anologue, so after switch off they will do better now? -- Regards, David Please reply to News Group |
Digital switchover HD plans
On May 13, 10:07 pm, "David" wrote:
"DAB sounds worse than FM" [email protected] wrote in ... The remaining 1074 sites will account for 9.9 ish % coverage. The COM mux operators have decided it's not economically viable to extend any further. The PSB operators (BBC, ITV, C4, 5 etc) are obliged to provide 99ish % coverage. Five won't be available to the 9.9% if the Digital UK website is correct. Don't Five get less coverage than the big 4 now on anologue, so after switch off they will do better now? C5 will be carried on the PSB 3 mux after DSO in each region, so 99% UK coverage from all 1154 sites. This is confirmed on the Digital UK website, so I don't know which bit DABSWTFM was looking at ? http://www.digitaluk.co.uk/en/what/f...nnels-will-be- avialable-as-a-result-of-switchover? |
Digital switchover HD plans
Mark Carver wrote:
On May 13, 10:07 pm, "David" wrote: "DAB sounds worse than FM" [email protected] wrote in ... The remaining 1074 sites will account for 9.9 ish % coverage. The COM mux operators have decided it's not economically viable to extend any further. The PSB operators (BBC, ITV, C4, 5 etc) are obliged to provide 99ish % coverage. Five won't be available to the 9.9% if the Digital UK website is correct. Don't Five get less coverage than the big 4 now on anologue, so after switch off they will do better now? C5 will be carried on the PSB 3 mux after DSO in each region, so 99% UK coverage from all 1154 sites. This is confirmed on the Digital UK website, so I don't know which bit DABSWTFM was looking at ? http://www.digitaluk.co.uk/en/what/f...nnels-will-be- avialable-as-a-result-of-switchover? I was looking at what the Digital UK website said that Whitehaven would get: http://www.digitaluk.co.uk/en/where/...whitehaven-get and it doesn't include Five in that list. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
"DAB sounds worse than FM" [email protected] wrote in message news:[email protected] I was looking at what the Digital UK website said that Whitehaven would get: http://www.digitaluk.co.uk/en/where/...whitehaven-get and it doesn't include Five in that list. In my view all terrestrial digital transmitters should give the same choice of 6 muxs. If I were in an area such as your Whitehaven I would be compaining about being short changed. We all pay the same UK licience fee! The Government should compel the the transmitter site owners to do this. -- Regards, David Please reply to News Group |
Digital switchover HD plans
David wrote:
"DAB sounds worse than FM" [email protected] wrote in message news:[email protected] I was looking at what the Digital UK website said that Whitehaven would get: http://www.digitaluk.co.uk/en/where/...whitehaven-get and it doesn't include Five in that list. In my view all terrestrial digital transmitters should give the same choice of 6 muxs. If I were in an area such as your Whitehaven I would be compaining about being short changed. I don't live in Whitehaven, Whitehaven is the first place where analogue TV will be switched off this coming October. We all pay the same UK licience fee! The licence fee is for the BBC though, and they'll get BBC TV. The Government should compel the the transmitter site owners to do this. They can't force commercial TV channels other than ITV, C4 and Five to spend money when it might lose them money, which is a bit like ordering Tesco to open a hypermarket on the Outer Hebrides. But by the same token, the broadcasters cannot expect to be given spectrum that doesn't belong to them - especially when it is prime spectrum for mobile communications when they want to use it for stationary reception, and solutions exist to allow the broadcasters to provide the HDTV channels they say they want to provide. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
On 13 May, 09:55, "David" wrote:
"Max Demian" wrote in message ... "David" wrote in message Either you live in an area between many transmitters, or you have a very sensitive FM tuner. FM used by our portable radio with telescopic aerial and the car radio. Live in West Yorkshire, many, many duplications of BBC Radio2 etc. BBC Radio Leeds 2 or maybe 3. Would that be a mono portable radio? You need a much higher signal strength to receive stereo hiss-free. I used to live in Colchester, one of the areas where Classic FM decided not to use the frequency which was allocated to them. It went to a local station called Dream 100 instead. Needless to say Dream 100 was easy to receive, but Classic FM was a mess, and got worse the further you drove from London. But of course, any job which you know nothing about seems easy. On that basis, I'm sure we could all do frequency planning better than the people who actually do it...! Cheers, David. |
Digital switchover HD plans
On 12 May, 13:03, "DAB sounds worse than FM" [email protected] wrote:
When the analogue signal has been switched off in a given region, e.g. Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use so that the regions that switchover first will get for example the BBC HD channel before the other regions? I've seen a mention of two sets of muxes being distributed nationally during switch over - the current set, _and_ the PSB1, PSB2, PSB3, COM1, COM2, COM3 set, which are different: all 64 QAM, with channel five on the BBC mux. If this is true, it suggests people (even those with DTT already) will see an immediate advantage to switch over in their area (extra capacity). If it's not true, I don't see how it'll work because the relays will still be without channel five. Cheers, David. |
Digital switchover HD plans
On May 14, 8:26 am, "DAB sounds worse than FM" [email protected] wrote:
Mark Carver wrote: C5 will be carried on the PSB 3 mux after DSO in each region, so 99% UK coverage from all 1154 sites. This is confirmed on the Digital UK website, so I don't know which bit DABSWTFM was looking at ? http://www.digitaluk.co.uk/en/what/f...nnels-will-be- avialable-as-a-result-of-switchover? I was looking at what the Digital UK website said that Whitehaven would get: http://www.digitaluk.co.uk/en/where/...tml#what-will-... and it doesn't include Five in that list. You're right, it doesn't. Looks to me that they are getting the existing Muxes, 1,2 and B. C5 is on Mux A. C5 are supposed to be moving to what will be PSB-3, that will be a BBC/C5/S4C/Gaelic TV mux. It looks as if the PSB/COM mux structure will not be up and running in time for the Whitehaven DSO. Perhaps when the rest of the Border region switches (a year later) then Whitehaven will switch to PSB 1,2,3. |
Digital switchover HD plans
On May 14, 8:34 am, "David" wrote:
In my view all terrestrial digital transmitters should give the same choice of 6 muxs. If I were in an area such as your Whitehaven I would be compaining about being short changed. All 1154 transmitters cannot broadcast six muxes, there is not enough spectrum avaialble. ISTR there can only be a maximum of 200 stations that could do so, the COM operators have decided on just 81. In any case, there's nothing compelling that'll be missed. Shopping channels, a few +1s, and some crappy radio stations. Hardly worth worrying about IMHO. |
Digital switchover HD plans
On May 14, 9:27 am, "
wrote: On 12 May, 13:03, "DAB sounds worse than FM" [email protected] wrote: When the analogue signal has been switched off in a given region, e.g. Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use so that the regions that switchover first will get for example the BBC HD channel before the other regions? I've seen a mention of two sets of muxes being distributed nationally during switch over - the current set, _and_ the PSB1, PSB2, PSB3, COM1, COM2, COM3 set, which are different: all 64 QAM, with channel five on the BBC mux. If this is true, it suggests people (even those with DTT already) will see an immediate advantage to switch over in their area (extra capacity). If it's not true, I don't see how it'll work because the relays will still be without channel five. My understanding is that existing DTT transmitters will continue to broadcast the present 1,2,A,B,C,D structure, until DSO at that transmitter. From DSO then they will switch to PSB/COM, with dependent relays broadcasting DTT for the first time with PSB1,2,3. So yes, 1,2,A,B,C,D and PSB/COM will co-exist until Divis in Ulster switches in Nov 2012. http://tx.mb21.co.uk/dso/index.shtml BTW the channel allocations are out for Whitehaven, and the rest of the Border area:- http://www.ofcom.org.uk/tv/ifi/tech/...ils/border.pdf |
Digital switchover HD plans
wrote in message oups.com... On 13 May, 09:55, "David" wrote: .. Would that be a mono portable radio? You need a much higher signal strength to receive stereo hiss-free. Yes it is, but the car set is stereo and by thier nature car aerials not high. -- Regards, David Please reply to News Group |
Digital switchover HD plans
"Mark Carver" wrote in message ps.com... On May 14, 8:34 am, "David" wrote: In my view all terrestrial digital transmitters should give the same choice of 6 muxs. If I were in an area such as your Whitehaven I would be compaining about being short changed. All 1154 transmitters cannot broadcast six muxes, there is not enough spectrum avaialble. ISTR there can only be a maximum of 200 stations that could do so, the COM operators have decided on just 81. In any case, there's nothing compelling that'll be missed. Shopping channels, a few +1s, and some crappy radio stations. Hardly worth worrying about IMHO. I would miss Five, watch it as much as BBC1 and ITV1. -- Regards, David Please reply to News Group |
Digital switchover HD plans
On May 14, 10:57 am, "David"
In any case, there's nothing compelling that'll be missed. Shopping channels, a few +1s, and some crappy radio stations. Hardly worth worrying about IMHO. I would miss Five, watch it as much as BBC1 and ITV1. Please go back and read what's been said. Five will be on a PSB mux, and therefore after DSO is complete will be available from all 1154 transmitter sites. Anyone that will receive BBC, ITV, and 4, will also get C5. i.e. 99% of the population. |
Digital switchover HD plans
Mark Carver wrote:
On May 14, 8:26 am, "DAB sounds worse than FM" [email protected] wrote: Mark Carver wrote: C5 will be carried on the PSB 3 mux after DSO in each region, so 99% UK coverage from all 1154 sites. This is confirmed on the Digital UK website, so I don't know which bit DABSWTFM was looking at ? http://www.digitaluk.co.uk/en/what/f...nnels-will-be- avialable-as-a-result-of-switchover? I was looking at what the Digital UK website said that Whitehaven would get: http://www.digitaluk.co.uk/en/where/...tml#what-will-... and it doesn't include Five in that list. You're right, it doesn't. Looks to me that they are getting the existing Muxes, 1,2 and B. C5 is on Mux A. C5 are supposed to be moving to what will be PSB-3, that will be a BBC/C5/S4C/Gaelic TV mux. It looks as if the PSB/COM mux structure will not be up and running in time for the Whitehaven DSO. Perhaps when the rest of the Border region switches (a year later) then Whitehaven will switch to PSB 1,2,3. This switching of Muxes is going to be a shambles for the millions of viewers who don't appreciate that a weekly rescan will be mandatory. And what about the little old lady whose STB freezes? How long before she realises it's the box and not the transmission? The way DSO is being implemented is making it a cowboy's charter. -- Immunity is better than innoculation. Peter |
Digital switchover HD plans
In article ,
Peter Hayes wrote: This switching of Muxes is going to be a shambles for the millions of viewers who don't appreciate that a weekly rescan will be mandatory. I've already experienced that problem with my mum, she kept saying her remote control wouldn't work any more and had asked for a new one - her next door neighbour had agreed with her too. Went round there and found she was using a box which didn't have a single button on it - not even a power one. Unplugged it at the wall for a bit, plugged it back in and the remote works now. There is of course a help section in the manual, but it doesn't mention anything about resetting the box if the remote fails to work. -- ___________________________________________ |\ /| ark Fraser | \/ | Somerset /www.mfraz.freeserve.co.uk | |__________/Acorn SA RISC PC You know what the sig means! |
Digital switchover HD plans
"David" wrote in message
wrote in message oups.com... On 13 May, 09:55, "David" wrote: . Would that be a mono portable radio? You need a much higher signal strength to receive stereo hiss-free. Yes it is, but the car set is stereo and by thier nature car aerials not high. Many stereo FM car radios have "stereo/mono blend", where the reproduction becomes progressively less stereo as the signal become weaker rather than getting more hissy, so you might not notice poor reception. Also car radios are much more sensitive than fixed ones in order to cope with mobile reception conditions. -- Max Demian |
Digital switchover HD plans
In article om,
Mark Carver wrote: On May 14, 8:34 am, "David" wrote: In my view all terrestrial digital transmitters should give the same choice of 6 muxs. If I were in an area such as your Whitehaven I would be compaining about being short changed. All 1154 transmitters cannot broadcast six muxes, there is not enough spectrum avaialble. ISTR there can only be a maximum of 200 stations that could do so, the COM operators have decided on just 81. Of course, not all the analogue relays will actually be needed for DTTV, particularly when they were needed to deal with multipath. Perhaps someone will the check these out after DSO and reallocate their channels. unlikely In any case, there's nothing compelling that'll be missed. Shopping channels, a few +1s, and some crappy radio stations. Hardly worth worrying about IMHO. -- From KT24 - in "Leafy Surrey" Using a RISC OS computer running v5.11 |
Digital switchover HD plans
wrote:
On 12 May, 13:03, "DAB sounds worse than FM" [email protected] wrote: When the analogue signal has been switched off in a given region, e.g. Border will be the first, will that region then have the full 6 x 24 Mbps = 144 Mbps of capacity to use so that the regions that switchover first will get for example the BBC HD channel before the other regions? I've seen a mention of two sets of muxes being distributed nationally during switch over - the current set, _and_ the PSB1, PSB2, PSB3, COM1, COM2, COM3 set, which are different: all 64 QAM, with channel five on the BBC mux. If this is true, it suggests people (even those with DTT already) will see an immediate advantage to switch over in their area (extra capacity). If it's not true, I don't see how it'll work because the relays will still be without channel five. It sounds like some regions will get HD first then. The PSBs have been saying that they're desperate to provide their channels in HD, so we should see how eager they really are to provide them... -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
On 14 May, 17:40, charles wrote:
In article om, Mark Carver wrote: On May 14, 8:34 am, "David" wrote: In my view all terrestrial digital transmitters should give the same choice of 6 muxs. If I were in an area such as your Whitehaven I would be compaining about being short changed. All 1154 transmitters cannot broadcast six muxes, there is not enough spectrum avaialble. ISTR there can only be a maximum of 200 stations that could do so, the COM operators have decided on just 81. Well, there's clearly enough spectrum available for them to tx 4 muxes, because they ttx 4 analogue channels now! It's the cost, and the decision to sell off spectrum, rather than the lack of available spectrum itself, which will limit the number of muxes to 3. Of course, not all the analogue relays will actually be needed for DTTV, particularly when they were needed to deal with multipath. Perhaps someone will the check these out after DSO and reallocate their channels. unlikely Very unlikely in some cases. The only reason for DTT to exist is so that they can switch off analogue, flog some spectrum, but people can continue to receive TV through their exsting aerials. If a thousand people have to turn their aerial around to face the main tx (and maybe replace it, if it's a different group), it could be cheaper to keep the existing relay - and certainly better PR for the BBC and government. In any case, there's nothing compelling that'll be missed. Shopping channels, a few +1s, and some crappy radio stations. Hardly worth worrying about IMHO. We have little idea what will be on Com1,2,3 by 2012. It won't be PSB, but it will probably include plenty that many people want to watch. Still, as long as there's a decent, full Freesat service by (before) then, no one needs to worry. Cheers, David. |
Digital switchover HD plans
In article ,
Max Demian wrote: Also car radios are much more sensitive than fixed ones in order to cope with mobile reception conditions. IIRC there is a theoretical maximum sensitivity which was achieved many years ago. -- *Virtual reality is its own reward * Dave Plowman London SW To e-mail, change noise into sound. |
Digital switchover HD plans
wrote:
On 14 May, 17:40, charles wrote: In article m, In any case, there's nothing compelling that'll be missed. Shopping channels, a few +1s, and some crappy radio stations. Hardly worth worrying about IMHO. We have little idea what will be on Com1,2,3 by 2012. It won't be PSB, but it will probably include plenty that many people want to watch. Still, as long as there's a decent, full Freesat service by (before) then, no one needs to worry. There's still the issue of Channel 4 and Five being encrypted on satellite though. Channel 4 said recently that they want to be free-to-air on Freesat but they're still under contract with Sky, but as Freesat is being launched as an option for people to switch to digital TV who can't get Freeview you'd hope that Ofcom would intervene, but they're (in their own words) "biased towards non-intervention", so they'll do bugger all and then say "the market decided". BTW, I see that the bit rate of the BBC HD channel has fallen on satellite to about 16 Mbps: http://www.digitalradiotech.co.uk/uk..._bit_rates.php Presumably the H.264 encoder has got better, and I was told last week that 2nd generation H.264 encoders are due out in the next 6-12 months that'll bring the bit rate down to 8-12 Mbps. To be honest, the bit rates were never going to stay at 20 Mbps, but so long as it still looks good I don't mind. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
Digital switchover HD plans
On 16 May, 12:34, "DAB sounds worse than FM" [email protected] wrote:
BTW, I see that the bit rate of the BBC HD channel has fallen on satellite to about 16 Mbps: http://www.digitalradiotech.co.uk/uk..._bit_rates.php Presumably the H.264 encoder has got better, and I was told last week that 2nd generation H.264 encoders are due out in the next 6-12 months that'll bring the bit rate down to 8-12 Mbps. To be honest, the bit rates were never going to stay at 20 Mbps, but so long as it still looks good I don't mind. People on DS claim a visibly poorer picture. It's quite easy to make a fair comparison as BBC HD repeat things so often! I don't have an HDTV, so can't comment. Cheers, David. |
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