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Advertising of DAB radios on the BBC

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Messages: 51 - 56 of 56
  • Message 51

    , in reply to message 50.

    Posted by dudebobski (U13914659) on Tuesday, 8th January 2013

    The main problem with DAB is that it is so far behind in time. When I listen to live cricket I want it LIVE like I get on Radio4 LW, not 3 or 4 seconds behind like it is on 5LiveSportsExtra or a full 10 seconds via the BBC Radio i-player. 
    If the delay is only 3-4 seconds what difference does it make?

    There may well be a good reason, but I don't listen to sport on the radio so I'm curious to know what the reason is!  
    Yes, but no two DAB radios seem to share the same delay time, so having two or more DAB radios on in the same house is like being in an echo chamber! It's very frustrating.

    FM does not suffer from this problem.


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  • Message 52

    , in reply to message 51.

    Posted by Peta (U24) on Wednesday, 9th January 2013


    Do many of you listen to more than one radio at the same time?

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  • Message 53

    , in reply to message 51.

    Posted by technologist (U1259929) on Wednesday, 9th January 2013

    The main problem with DAB is that it is so far behind in time.. 
    ....I'm curious to know what the reason is!  
    Yes, but no two DAB radios seem to share the same delay time, so having two or more DAB radios on in the same house is like being in an echo chamber! It's very frustrating.

    FM does not suffer from this problem.
     


    A few answers etc ... (even though this is a TV programme board!)

    Delay - firstly compressing a signal takes a bit of time
    - But the main delay is that the BBC UK DAB mux (ensemble) is delivered to the transmitters by Satellite (which is a second or two) and then time aligned so that the signals from the transmitter add up to give you a better signal (they all work on a single frequency) -
    for completion some major sites are fed by fibre BUT time alignment is important.... and satellite distribution is a lot cheaper and reliable than fibre.... hence the rollout of BBC UK DAB is now 94% population.

    Just to deal with another query - BBC Nation/Local radio is carried on commercial Muxes -and some do not exist but are coming soon!(perhaps)

    So why do different Radios output their signal differently - this is because there are many ways of decoding the signal and different radios do it differently - (and even the same radio may have a slightly different delay)

    I think that this no one thought to specify that it could all be the same ...as after all FM/ AM Radio does it because there is no complex time consuming processing ..and it is difficult to do.....

    You will find that there are similar effects with TV ..... and on Satellite some versions of BBC one are offset to make Statistical multiplexing easier.

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  • Message 54

    , in reply to message 53.

    Posted by dudebobski (U13914659) on Wednesday, 9th January 2013

    Technologist said,

    >"A few answers etc ... (even though this is a TV programme board!) "

    Except that this is not the TV board is it? There are two Points Of View boards, and this one is entitled "The BBC". It is headed: "Welcome! Share your thoughts and views about BBC in general in this section...."

    The other POV TV board is entitled "BBC Television programmes " and is headed: "Welcome! Share your thoughts and views about BBC Television programmes with us..."

    I'm doubly confused by your own confusion on this issue, because you have recently informed a poster on another thread that there is not a TV board at all!

    As in this: > "Posted by technologist (U1259929) on Wednesday, 2nd January 2013: Well there is NOT a BBC TV board either ....."

    Or am I missing something?




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  • Message 55

    , in reply to message 52.

    Posted by stevefb (U14977970) on Wednesday, 9th January 2013

    Do many of you listen to more than one radio at the same time?  I certainly do, or did.

    Back in my analogue days I'd often have three radios running simultaneously. One in the kitchen, one in my study and one upstairs. Absolutely essential during a Test match.

    DAB wasn't much good for that, so now internet radio (and music) is simply streamed to various locations around my home.

    Report message5

  • Message 56

    , in reply to message 52.

    Posted by dudebobski (U13914659) on Wednesday, 9th January 2013


    Do many of you listen to more than one radio at the same time?

     
    I do, both at home and in the workplace. It's better than switching off every time you leave a room and switching on again when you enter another.



    Report message6

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