They burble just like the subterraneans on Stingray and it renders newscasters voices about as intelligible.
My car will mostly do OK on DAB apart from in valleys but my home location is very poorly served by DAB even with a fancy aerial and even then the encoding quality on programme material is very poor. If you have hifi you do not want broadcast material compromised at source!
650 MB/hr is about 1.5 Mbps and I find that on disc file size is for SD versions.
"HD" (720) tends to be over 1.1 GB on disc or about 2.4 Mbps. Those data rates corespond with those shown in the transcoding process in get_iplayer.
Hum, how does one get hold of that then? The above are OK but could be better.
Seems to be about the same as the downloaded g_ip versions looking at ISP useage graphs.
True enough but there is only so much you can throw away before it really starts to show. DDTV is awful.
Can't say I've noiced that one but then I watch further away than would enable me to see pixel based errors.
because
Cumbria.
Wandered off to iNorthhumberland, not covered by that map either. I think email to Connecting *Cumbria* is required to find out why part of the county is missing from the map...
Load of bollocks, it says 1 - 2.5 Mbps, we have a pretty stable 6 Mbps. It has crept up over the years from about 4 Mps.
So what are they doing with all the ADSL2+ DSLAMs that will be released from areas that get FTTC? Flogging 'em off to other countries and making even more money?
We have ali ... I suspect the improvement over the years is due to all the iffy joints being remade. Certainly a year or so back the moment any of the holes or posts where fiddled with our line would go off, may or may not come back depending on wether the a wire fully fell out of the jelly bean or not. Last couple of times I've seen BT fiddling there has been no affect on our line at all. Not that I'm that bothered if it does go, we have Total Care and if there is a line fault it's the POTS that has gone. If it's just a wire fractured in a jeely bean the ADSL will hang in there at a silly slow rate but enough for VOIP.
funded
With no public money? Sort of surprised as there is/was a £25 million pot available from BDUK to help these sort of small enterprises with capital costs. But the delayed information about where they are/are not going to do FTTC totaly screws up any business model that hasn't already got public funding and even then the "double funding" is no guarantee that BT will be locked out. The whole BDUK, Fujitsu, BT, Councils thing is very fishy and a right mess. In ten years time I can see that FTTC will be seen as the "cheap" stop gap it is and even more money will have to be spent on GPON based FTTP systems.
The loss and speed (44 dB/6 Mbps) indicates about 3.3 km (2 miles) that's about right. Long but not overly so for a rural area, tThe "as the crow flys" distance is 3.1 km and the road follows that fairly closely.
Which goes to show it was a rather bad idea - at least without building in a more "software" based receiver as part of the spec.
No-one with a computer cares if "Internet Radio" ramps up through the codecs as they are able to trivially upgrade their player - so the system as a whole can freely evolve.
Trying to lock in a standard with pure hardware players which is inherently deficient (lots of lossy compression, in a time when codecs are rapidly evolving) was asking for grief.
Let's see:
405 line VHF TV - 1936-1985 (49 years) 625 line UHF PAL TV - 1964-2012 (48 years)AM Radio - 1919 (1st scheduled broadcast) - still going (95 years) FM Radio - 1955 (BBC) - still going (59 years)
DAB - 1995 (pilots) - still going, not as popular at AM or FM and being superceded by DAB+ (19 years)
78 RPM records - 1925 ish - 1960s (About 35 years) 33-1/3 RPM records 1948 - 1990s (popular decline, but still around at present) (42 years - popular, 66 years viable format)CD Audio 1982-present (32 years).
What I'm seeing there is that uncompressed formats seem to have very long engineering lifetimes. As soon as we start accepting lossy compression tricks to compensate for lack of bandwidth, you are into a fast move evolutionary game were formats get more efficient (but still lossy) and bandwidth goes up (often used to put more tat out than improve the quality of the current channels.
It's not even a battle between analogue and digital (the CD was successful) just compressed digital.
I am sure if the early radio engineers has tried really hard they could have squeezed a few more channels of AM and FM into the airspace with a loss of quality.
We might have done better if we'd gone for lossless compression or no compression and just had a few channels with extremely high quality.
Hindsight is a wonderful thing.
Really? It may well be flaky in some parts of the country, but this applies to other forms of transmissions too. There is no single one which gives perfect coverage everywhere.
One thing I did find was you need a decent aerial for it in the car.
Why are you concerned about DAB? You've said you have perfect alternatives.
In article , Dave Plowman (News) scribeth thus
Yes Dave but thats not a problem over ALL of the UK;!...
It might be in your backyard but thats not everywhere. I'd swap a bit of odd m/path for the other degradation's applied to the DAB signal before I even receive ti!...
I don't suppose that many do;!...
That was one of the problems, but it doesn't get around the real problem and that lies with the fact that you can alter the bit rates, down usually, reason being is that bits cost!..
I haven got the DAB ratecard around but on a local MUX 64 K Mono is around 20 K a year 128 stereo is around 50 "ish" K a year to transmit....
Doesn't the Mighty Moss carry DAB as yet?..
I thought that covered most all of north England and all of gods chosen county;-)...
That is all the ISP guarantees. It doesn't take account of the up to
8Mbps that is possible with the later tweaks to CN20 exchanges.It does tell you which cabinet you are on and what services the exchange is capable of supplying to your number.
My losses now are typically 48dB and sync 4448Mbps although on a good dry day it can sync as high as 6Mbps the BRAS is locked at 4Mbps.
My uplink performance is dreadful with huge bit error rates :(
They knew that MPEG-2 draft was in progress. It was a dumb decision then and an even dumber one now to keep pushing a deeply flawed system.
Have you any idea when DAB was designed? And why? Hint - at the time no-one envisaged 'internet radio' or the sophistication of modern phones and so on.
The idea was to provide high quality mobile reception.
Then the bean counters moved in.
It is in many parts. And in the average house if using a portable radio - as people etc move around a room.
You'd think there was a definite move to stop FM transmissions the way people here go on.
What would make sense would be to get reduce the number of stations on DAB and go back to the original data rates. Which were reasonably satisfactory. After all, there are now several alternative platforms for those non national services.
"Flaky"?
There is _no_ DAB signal here. None.
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TBH, I think the DAB broadcasting system was set up purely as a "Social Experiment" to see how far it was possible to downgrade the quality before 'the penny dropped' in the collective mind of the gul... er general public (and incidently, how far they could outragiously lie about the product with those damned annoying "Cartoon Coon" adverts).
DAB, at its best in the early days was barely adequate to start with so it seems quite obvious that this was always the original intent.
You forget the interlaced 2:1 compression technique used by analogue TV. It was a very neat way to halve the bandwidth requirements without obvious detriment to moving image content. It only showed its downside when displaying static images with fine detail or used as a text display device.
DAB was simply a cruel 'social experiment' imposed by the sort of mind typical of the WW2 Nazi Doctors experimenting on the inmates in the infamous 'Death Camps'.
Yes - I know. That doesn't mean it was a good idea.
And that.
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