How Digital Radio Works

Ғылым және технология

An introduction of the differences between analogue and digital radio, and why digital radio is a better system for the future.
Web page write up is available here:
tallpaultech.com/?p=397
Links to programs used in video:
spektrum
github.com/pavels/spektrum
qt-dab
github.com/JvanKatwijk/qt-dab...
welle.io
www.welle.io/
gqrx
gqrx.dk/download
mediainfo
mediaarea.net/en/MediaInfo/Do...

Пікірлер: 58

  • @babayaga1758
    @babayaga17583 жыл бұрын

    You're making a huge impact. Your sacrifices don’t go unnoticed. 👍

  • @tobmaster1985
    @tobmaster19853 жыл бұрын

    14:44 "Don't ask me about Windows, 'cause I don't care" Thanks for another reason I like your channel & videos 👍🤓

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    Good to see there's still people out there who don't cry at the drop of a hat

  • @otoolepw

    @otoolepw

    3 жыл бұрын

    @@TallPaulTech You got me on to Linux from your series of videos last year. I'm still somewhat of a n00b hacking my way about but liking the control there is over it. My job mandates the corporate stuff so this is on my own time. Shame there isn't an easier path for smaller employers who are being fleeced now more than ever, azure, aws et al.

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    I could not agree with you more. Linux lets you do things that you want. It's your computer system. You're right about everyone getting fleeced too. I'm actually concerned about the way these things try to steer messages by suggesting responses for youto just click on, rather than writing your own genuine response. Those auto response options are always lah-de-dah nice pretty lovey dovey responses. It's just not real.

  • @FloKoboi
    @FloKoboi9 ай бұрын

    Great summary, awesome. Thanks mate! 🫶

  • @bvds2007
    @bvds20073 жыл бұрын

    Fantastic video & set of links

  • @JTMilic
    @JTMilic Жыл бұрын

    Great video mate!!!

  • @farticus01
    @farticus013 жыл бұрын

    I like the new channel name and the video was very informational

  • @An.Individual
    @An.Individual3 жыл бұрын

    What have they done with CWNE88?

  • @calibre_au6183
    @calibre_au61833 жыл бұрын

    Love your knowledge, love your content.

  • @egbertgroot2737
    @egbertgroot27372 жыл бұрын

    One of the few video's with an in-depth presentation on the DAB+.topic Thx!

  • @padden999
    @padden9993 жыл бұрын

    Satellite technology in deep would also be nice. Great video. Thanks.

  • @Elvis-guy1973
    @Elvis-guy19738 ай бұрын

    DAB might work in Australia, but its not worth a bugger in the UK!

  • @SproutyPottedPlant

    @SproutyPottedPlant

    7 ай бұрын

    It works perfectly here! I’ll take my 100 UK DAB stations instead of 6 FM ones that barely work in my area thank you very much 😀

  • @Elvis-guy1973

    @Elvis-guy1973

    7 ай бұрын

    @@SproutyPottedPlant I spent £120 on a fancy Dan Roberts DAB+ radio and the only stations I could pick up were a couple of Asian stations and a local station. Surely that is unacceptable. After a week I got sick of looking at it and took it back. Based on Argos reviews I decided to buy a Bush DAB+ model. For £35, I got a radio that picks up over 100 stations with not too much difficulty and with decent reception. I'm finding different makes of DAB radios give you differing quality in service. For example, my old Pure DAB radio signal was perfect and in comparison, the Roberts radio is a joke.

  • @r.b.ratieta6111
    @r.b.ratieta61113 жыл бұрын

    You scared me there for a second. I went to look for your old channel name and saw it was no longer in my Subscriptions list. I thought with the lockdown measures they've been taking in Australia, KZread may have been doing some shadow censorship. I was like, "NOOOOOO..." Thankfully, you just changed your channel name, which I found after some extra searching. I always enjoy your videos. Glad you're still up and running.

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    I'm here, but I can't be fucked making these videos for the most part... not on youtube anyway. Something new will be coming in the near future. I don't know what yet, but something!

  • @netoeli
    @netoeli3 жыл бұрын

    terrific video

  • @fragske
    @fragske3 жыл бұрын

    I've picked up a blue dongle to play around with. But i'm looking around to get a better antenna. I'm a bit clueless. How to capture a wider range of radio transmissions?

  • @wilbamate
    @wilbamate3 жыл бұрын

    Looking fresh, did you end up finishing the install of your water tank ultrasonic sensor? I’ve been referencing a few of your videos as I delve into the world of tech operations and I’ve found your content to be super useful/informative. Enjoyed this one, appreciate the upload my dude!

  • @pquodling
    @pquodling3 жыл бұрын

    Re SDR Dongles - I have a couple of the black ones, planning to get one of the metallic - amazon have the "Rtl-sdr.com" onces, and also one labelled rtl-sdr blog? Are they the same?

  • @pquodling

    @pquodling

    3 жыл бұрын

    there are also some metallic case ones labelled as being from NESDR? any thoughts on them.

  • @seedymac
    @seedymac3 жыл бұрын

    Do you have your VK license? Great video, thanks!

  • @TVperson1
    @TVperson13 жыл бұрын

    Hi from Sydney 👋, Can you use the RTL-SDR to record all the DAB+ stations at once? Ordered one, going to take till October for it to arrive.

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    Theoretically yes. I mean, you can record the I+Q samples of the whole thing, but as for doing what I think you're trying to do, I haven't done that yet. I saw some programs that seemed like they were trying to do that but they were a bit raw and I couldn't get them working nicely. What I'd really like is a program like dvblast for digital tv, which streams out all the stations on their own multicast group. That would be ideal for digital radio too.

  • @stephanepeters6097

    @stephanepeters6097

    2 жыл бұрын

    ​@@TallPaulTech Hi from Belgium ;-) eit-stuff just seems to do that, at least for one channel. I just started looking at DAB a couple of days ago (the new pandora box !), and fell onto a simple dab player: dablin, which needs eti-cmdline to convert the stream from the rtl-sdr dongle to a pipe. Instead of a pipe it can save to a file, which you can still open with dablin, and then you choose any station of that stream, . You still need to select your channel beforehand.

  • @thingyee1118
    @thingyee11183 жыл бұрын

    And do you have a license?

  • @cazarilolsen4630
    @cazarilolsen46303 жыл бұрын

    Is this the same as HD radio in the USA.?

  • @degan6

    @degan6

    3 жыл бұрын

    no

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    I personally don't know what system they use over there, but let's just have a think about this.... they don't use the same digital tv standard as the rest of the world, they don't use the same electricity supply as most of the world, they get scared by the words 'metric system', so I'm going to go out on a limb here and suggest they probably don't use the same system. They don't really play nicely with others, do they? :D

  • @yannisgk

    @yannisgk

    5 ай бұрын

    lol@@TallPaulTech

  • @randomstring200
    @randomstring200 Жыл бұрын

    Hi Paul, very interesting your video about DAB+ in Australia; and it is true that DAB makes a more efficient use of the spectrum than analogue FM; but ... 88 > 108 Mhz is a 20 Mhz bandwidth; if you set one FM TX each 400 Khz, then you have 20000 / 400 = 50 stations, approx (I am rounding numbers here); first consideration: the 400 Khz separation is dictated by ACMA, not by a real technical rule or formula; in other parts of the world TX licenses in ana FM are issues even wit has low as 50 Khz separation; and trust me, you can tune each one of them no problem; yes, you would need better quality (i.e. higher selectivity) receivers, but then what the ACMA is saying is that b'cause in Australia crap FM RXs are allowed to be sold, then the minimum separation can't be any lower than 400 Khz? Anyway, lets' stay with the 50 stations inside a 20 Mhz bandwidth; Let's focus now on another digital modulation: DRM30; DRM 30 has been designed and advertised as the way to digitise AM and SW; I have carried out few experiments and found (with my own eyes and ears) that stereo audio, better than FM and almost CD quality, can be transmitted using just 20khz of bandwidth using the OPUS audio encoder with DRM30; during my experiments I have also found that it is absolutely irrelevant the actual frequency used to transmit the data stream; I have even very successfully transmitted the DRM30 data stream via internet, sending it to an ICEcast server, then tuning into it from another PC / another location and feeding the data stream received to a DRM decoder via a virtual audio cable; with beyond impressive results; SNR >60 dB!!!; so, I don't know over east ( I am in Perth) but here nobody listens to DAB; everybody goes with conventional FM for convenience or with web radio streaming; simply because almost everybody has an FM radio already and definitively everybody has already a smartphone with internet access, so why would anyone want to spend $ 50 por more for a decent DAB radio? RAdio is not the same as TV; TV was successful in moving from ana to didgi because one can actually SEE the difference; HD, UHD, just are not possible with analogue TV; but with radio, FM quality is enough for the vast majority of listeners; a good FM station already provides interference free reception; and if they will one day stop TXing in analogue, people will simply switch to internet streaming, not DAB. DRM30 used on FM band 88 - 108 has, in my opinion, a change; because it takes much less bandwidth than ana FM and becausesmall adaprtos might be marketed to adapt already existing FM radios to receive digital DRM30. Think about this: why do you think CRA ha snot abandoned FM analogue just as yet? Why do you think HPONs and LPONs still can fetch many thousands if not tens of thousands of dollars at auction, if they are allegedly a thing of the past? Cheers, Stefano VK6WFM

  • @TallPaulTech

    @TallPaulTech

    Жыл бұрын

    I know a couple of people who bought specific digital radios. I don't know their motive, but I think a lot of new cars have them nowadays. As for tv, I recall the gov even paid welfare people to get a set top box so they wouldn't miss out on tv. Priorities!

  • @randomstring200

    @randomstring200

    Жыл бұрын

    @@TallPaulTech Yes, but TV is different; would you be able to make a similar video but describing the technical details of DRM?

  • @j7ndominica051

    @j7ndominica051

    10 ай бұрын

    You have to leave 200kHz gaps for the transmitters of the neighboring city to fit in. Otherwise you couldn't receive in the countryside area where both signals on the same frequency are equal in strength. Low deviation FM doesn't have the same fidelity. The SNR of a decoded digital codec is not a good measure. Digital adapts to the current average level, and can fall to absolute silence for infinite SNR. But at any instant the dynamic range is in the order of 10 to 30 dBs per subband depending on the bitrate. You get the familiar underwater sound and double speak. If the spectrum is "full" as in the case of rock music, then there is no spectral redundancy to extract. I don't see a need for even more local stations if most of them only transmit static music without new information. You could download a music collection of a particular theme instead. They could extend the FM band down to 65 MHz, and there already are radios that can receive it.

  • @jamesthompson3517
    @jamesthompson35173 жыл бұрын

    In the UK radio stations have highly compressed audio,even even with AAC codec being used. They seem ram in too many stations into a multiplex,which cause sound quality issues. Your favourite stations appear and go from multiplex from time to time. DAB is crap, there's more of varied selection in internet radio. I don't think DAB will be here for long .

  • @jamess1787
    @jamess17873 жыл бұрын

    Tall Paul tech? How tall? +200cm?

  • @richarddeane3039
    @richarddeane30392 жыл бұрын

    So how does digital radio work? I'm no wiser.

  • @ArclampSDR
    @ArclampSDR Жыл бұрын

    there is actually 4 ensembles now 9A 9B 9C and now 9D

  • @TallPaulTech

    @TallPaulTech

    Жыл бұрын

    I know. Keep up kzread.info/dash/bejne/gJdoxpKoZs7JXdo.html

  • @willgrigg1779
    @willgrigg17793 жыл бұрын

    why is it that every time you release a video it is about something i had just recently developed an interest in?

  • @CucamongaGuy

    @CucamongaGuy

    3 жыл бұрын

    It's kinda freaky... I just purchased the silver dongle two weeks ago on a whim.

  • @j7ndominica051
    @j7ndominica05110 ай бұрын

    They shoveled so many low effort music stations in there. If they only play music like the background of a supermarket, they can download the music easily and just play it without a radio. 32 kbit/s in the 21st century is a disgrace. Nobody would have music files any less than 192 today. At good quality you can fit more stations. Count the money that it cost them to put up the new super expensive computerized transmitters. And the kickbacks they received from manufacturers.

  • @programorprogrammed
    @programorprogrammed3 жыл бұрын

    Who is this guy? What did you do with CWNE88?! lol

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    Just some lunatic

  • @joeltyler3427
    @joeltyler34273 жыл бұрын

    I can't even get digital radio on the Gold Coast. Even if the repeater is on Mount Tamborine.

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    What are you using?

  • @joeltyler3427

    @joeltyler3427

    3 жыл бұрын

    @@TallPaulTech Sorry. I should of said it's not available on the Gold Coast.

  • @paulhunter123
    @paulhunter12310 ай бұрын

    well this goes way over my head i quit , i just want to know why DAB needs an 80's analogue aerial? and reception usually crap

  • @eliotmansfield
    @eliotmansfield3 жыл бұрын

    dont take this the wrong way - but you look more professional in a t-shirt rather than a wife-beater.

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    Don't take this the wrong way... I don't really give a fuck what some random cunt on the Internet thinks.

  • @vudu5vudu

    @vudu5vudu

    3 жыл бұрын

    What he said.

  • @eliotmansfield

    @eliotmansfield

    3 жыл бұрын

    @@TallPaulTech Dont sugar coat it - tell me how you really feel 😎 73 R Fuck.

  • @MaximumEfficiency
    @MaximumEfficiency5 ай бұрын

    So DAB will still be broadcasted over antennas? That's idiotic, instead of reducing RF pollution, we're increasing it!

  • @jamess1787
    @jamess17873 жыл бұрын

    Radio is nearly dead, with all the streaming services and personal media.... Radio wont last long, death of FM will surely be the death of radio... Except for those hardcore enthusiasts and hams.

  • @drjubierre

    @drjubierre

    3 жыл бұрын

    I do not agree. FM will die by sure, but radio will live much longer than most current social platforms

  • @TallPaulTech

    @TallPaulTech

    3 жыл бұрын

    @@drjubierre Exactly.

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