Re: DAB digital radio - Sharp FVDB1 £49.99 at Richer Sounds. Bargain?

DAB sounds worse than FM a écrit :

It's an improved system.



What is? DAB is a dreadful digital communication system. It's 15 years old and is well and truly out of date. 

Sorry, bad word. Like we say in France "faux amis" ...

DAB is a tested system for 15 years ;)

Simply, it's not digital system you like.

Becaues it is a crap system. 

Stop say the word "crap"
Simply the system you don't like.

But actually you're only theorical person.

At least I understand the theory, whereas you don't.

Do you know GSM story.
Developpment needed practice experiences. The theory can't do good simulation for this.

Or can you explain to me the merits and demerits of various FEC coding schemes?

I'm agree with efficacity of FEC, but to apply FEC you need data to control. So if propagation doesn't allow data reception, what do you want do your FEC !

And do you even understand the advantages and disadvantages of synchronous modulation compared to differential modulation? Although I'll give you that you should easily be able to see the benefit of using 16-QAM compared to QPSK......

Yes it's better for bitrate, but now it's theorical.
When you give me some test, another person give me others tests which tell contrary.


Sure technology update, but
DAB isn't bad digital system.

Yes, it bloody well is. But I'm afraid you're not qualified to say one way or the other. 

I'm not ingeneer, OK.
But my job relies on proof.
And in my practice, I prefer to use tested drug for 15-20 years ;)
So, I'm sure I don't poison my patient.

All that to say I'm not qualified to develop or to understand every fine thing but I'm realist.

But, I repeat, I never say that you have idiotic idea or you're imcompetent. I just say new systems need test to prove that it run really in real life.

The difficulty of DAB is developping without spectrum ressources
(only 6 DAB channels for england)



7 channels, actually. And we'll get 5 more, and still the audio quality will be dreadful.

I keep hope that consumers will bind broadcast to increase quality when spectrum will be there.

and national broadcaster like BBC
which want broadcast more than 6 radios on 1 channel ...

How many radios can survive on london area for example ?

In Paris, we can hope 14-16 DAB channels. With good quality in stereo,
we will have 90 radios.



How many f*cking times do you need telling? 

It's not correct speaking ! ;)

You will not get 192kbps stations. 

Why not.
It's true in england, it's false in denmark, in Portugal, in Germany.
experience prove we can get 192 kbps stations !
That is a fact, not a dream !

You will not get 14-16 DAB channels in Paris, because you seem to think that all available channels can then be used simultaneously everywhere around the sodding country; they cannot. You have to use multi-frequency networks. 

No, I back up on publications of broadcaster.
Ok it's theorical in fact, we need test ;)
It stays an estimation.

how much does a radio need to be broadcasted on DAB?
How many listeners are needed to earn money?

there are many econmic questions.



And how much does it cost to implement DAB compared to other systems? The answer is that DAB is very expensive to implement compared to DMB, DVB-H and DRM, which will mean that they will try and reduce bit rates in order to lower the cost of investment, which will result in you not getting your 192kbps stations.

waiting !
cost of DAB is known today, but you can't argue with DMB, DVB-H or DRM. No one has begin developping this systems. It's theorycal

Both VDL and TDF(?) said they wanted to use 128kbps for stereo radio stations on DAB. 

VDL and TDF broadcast radio station programs. they don't impose bitrate.
MP2 is an old codec, so encoder are better today.
128kbps isn't the better bitrate with the better codec. We are OK.
It will be the same with AAC+ and others ! In few years ... (certainly)

You are dreaming if you think you will get good audio quality on DAB. Simple as that.

no one can spend money for nothing.
Every aerial broadcasting need a lot of money. So you need program with good content quality to have listeners.
The spectrum ressources give the choice to radio to choose the coverage, quality and price of boradcast.
.

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