Re: BBC Censorship Cridland Style

"jamie powell" <jamie_p84@xxxxxxxxxx> wrote in message
news:h23i23$e3c$1@xxxxxxxx
"DAB sounds worse than FM" <dab.is@xxxxxxxxxx> wrote in message
news:7aknihF1v2b8hU1@xxxxxxxxxxxxxxxxxxxxx

You'll understand what I'm saying once you've graduated and you've
spent
a year or two out of uni. At the moment you're just full of bravado
because you're young and you think you know it all, but you haven't
had
time to "know it all" yet. You don't go from knowing nothing to
being an
expert just because you've taken a course in subject X. Becoming an
"expert" requires you to be able to draw on other subjects, some of
which you won't even have taken yet because you're in your 2nd year
at
uni. As I say, you'll understand what I mean in say 2- 3 years'
time
when you will have a lot more knowledge and a better understanding
than
you do now.

You're not an expert at anything, least of all audio compression and
other
DAB-related technologies.


I haven't claimed to be an expert on audio compression, although I'd
say I've got a "good" understanding of it, and I've definitely got a
far better understanding of it than you have.

I specialised in mobile digital comms systems on my MSc, so that's the
field I understand best. That also happens to be a vitally important
part of DAB and obviously ever other mobile communication system,
because in the case of DAB it consists of the OFDM, teh error
correction coding and related things like frequency and time
interleaving - basically everythign from the RF front end starting at
the ADC through to the audio decoder part of the DAB system (i.e. most
of the complexity of the DAB system). Do you claim to understand this
as well as - or possibly better than - I do, Jimmy?

Look, Jimmy, you're a 2nd year undergrad, so by 2nd year there's 0%
chance that they've covered OFDM *in-depth*, or anything more than
ultra-basic error correction codes - basically Hamming codes is
probably the max difficulty you might have seen by now - try
understanding how Reed-Solomon coding works if you want to see
postgrad level error correction coding at work. Here's a good tutorial
on how RS coding actually works:

http://www.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP031.pdf

Understand Gallois fields, do you Jimmy? Er, no, so you'd have to
learn Gallois fields before you can even figure out how RS coding
works, because all the arithmetic is done over the Gallois field,
which is different to how arithmetic normally works.

Then there's the mobile channel, which was one of the most difficult
things I had to fully get my head round at uni, so the thought of a
2nd year having to learn that is just a joke. So because you haven't
been taught the mobile channel you don't really understand how DAB,
DAB+, DMB, DVB-T, DVB-H or any other terrestrial broadcasting system
works properly yet, I'm afraid. Any knowledge you have at the moment
without a knowledge of how the mobile channel works is just an
overview of how the systems really work, becuase you're missing the
crucial bit about how the system interacts with the mobile channel. Or
do you claim you do understand how they work even though you haven't
been taught anything about the mobile channel? Probably.

To summarise, then, I doubt you've been taught much about audio
coding, you won't properly understand OFDM yet, you definitely won't
properly understand how convolutional coding and RS coding work yet,
and you won't have been taught about the mobile channel yet, so you
won't fully understand why interleaving provides a benefit when used
with OFDM.

Come to think of it, what do you understand about how DAB, DAB+, DMB,
DVB-T/H work, Jim? Not a bleeding lot, basically, yet you have the
cheek to claim that you're somehow a match for me in terms of
knowledge of digtial radio technologies!

Face it, you're a 2nd year undergrad, so you've literally just
finished the basics of your degree, and you're just about to move onto
subjects where you delve a little deeper into things. Don't delude
yourself that you have a good understanding of any of the technologies
that are used in DAB etc yet, because you don't. I'm not saying you
couldn't understand it, just that you haven't been taught it yet, so
your understanding at the moment is very basic.

<cue Jamie snipping all of the above, followed by "you don't know what
you're talking about, You haven't got any degrees">


You can quack all you want, but you simply don't
have the credentials, and that's that.


Yeah, you believe that if it makes you feel better.


This is why nobody in the industry or in the mainstream media takes
any
notice of you. They're the railway employees and you're the
obsessive
trainspotter, bumbling about on the sidelines.


What does that make you then?


But Jamie, everything you say is negative anyway, so when you're
trying
to be serious nobody is actually going to take what you say
seriously.
Cry wolf syndrome.

Err no... everything I say to *you* is negative, because you're
shit,
basically.


Er, yes, you are just negative to everyone you reply to apart from
your few allies such as Silk and seani.



--
Steve - www.savefm.org - stop the BBC bullies switching off FM

www.digitalradiotech.co.uk - digital radio news & info

"It is the sheer volume of online audio content available via
internet-connected devices which terrifies the UK radio industry. I
believe that broadband-delivered radio will explode in the years to
come, offering very local, unregulated content, as well as opening a
window to the radio stations of the world." - from the Myers Report


.

Relevant Pages

  • Re: BBC Censorship Cridland Style
    ... I've got a "good" understanding of it, and I've definitely got a far ... the case of DAB it consists of the OFDM, ... coding works if you want to see postgrad level error correction coding at ... Then there's the mobile channel, which was one of the most difficult ...
    (alt.radio.digital)
  • Re: BBC Censorship Cridland Style
    ... I haven't claimed to be an expert on audio compression, ... better understanding of it than you have. ... the case of DAB it consists of the OFDM, ... Reed-Solomon coding works if you want to see postgrad level error ...
    (alt.radio.digital)
  • Re: Digitale Radio is dood, Leve Digitale Radio!
    ... Either say which technologies you think that DAB+ uses are ... For its error correction coding, ... The error correction coding scheme that DVB-T2 is far more powerful ...
    (alt.radio.digital)
  • Re: Republic of Mike Terry
    ... So I can add the disability to cope with criticism. ... the scale of advances made in audio coding. ... saying you're a developer of digital radio -- with the implication being ... another Steve will come along and say that the new DAB is out-of-date ...
    (alt.radio.digital)