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K. B.
Guest
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 Posted:
Sun Nov 06, 2005 12:04 pm Post subject:
DAB for Mobile DTV |
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<http://www.eetimes.com/news/latest/showArticle.jhtml?articleID=173402896>
Kirk Bayne
alt.video.digital-tv Home Page
<http://www.geocities.com/lislislislis/avdtv.htm>
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Doug McDonald
Guest
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| Posted:
Mon Nov 07, 2005 12:24 am Post subject:
Re: DAB for Mobile DTV |
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DAB is simply a distrously stupid standard. Yes, it is COFDM,
but it simply badly designed. NOONE should use it for anything.
If you are absolutely certain that you must use a European
standard, there is DVB-T. There are also other, narrow-bandwidth,
"standards" of all sorts. Take your pick, or design your own,
but don;t burden the world with a bad standard.
Doug McDonald |
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K. B.
Guest
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| Posted:
Mon Nov 07, 2005 5:41 am Post subject:
Re: DAB for Mobile DTV |
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On Sun, 06 Nov 2005 12:24:16 -0600, Doug McDonald
<mcdonald@SnPoAM_scs.uiuc.edu> posted:
| Quote: | DAB is simply a distrously stupid standard. Yes, it is COFDM,
but it simply badly designed. NOONE should use it for anything.
|
Could the problems with DAB be mitigated by adding a layer
of error correction to the mobile DTV portion of the
datastream?
Kirk Bayne
alt.video.digital-tv Home Page
<http://www.geocities.com/lislislislis/avdtv.htm> |
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Doug McDonald
Guest
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| Posted:
Mon Nov 07, 2005 9:12 pm Post subject:
Re: DAB for Mobile DTV |
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K. B. wrote:
| Quote: | On Sun, 06 Nov 2005 12:24:16 -0600, Doug McDonald
mcdonald@SnPoAM_scs.uiuc.edu> posted:
DAB is simply a distrously stupid standard. Yes, it is COFDM,
but it simply badly designed. NOONE should use it for anything.
Could the problems with DAB be mitigated by adding a layer
of error correction to the mobile DTV portion of the
datastream?
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No. One problem can't be fixed. It uses a strange and very inefficient
form of differential PSK modulation. This means low
bitrate per power used (sound familiar for Europena COFDM?)
compared to all later COFDM standards. Of course more error
correction would lower the effective bitrate. However,
there are variants that in fact do just that.
DRM and the US digital radio standard (for the US one, I mean
the non-IBOC part) are perfectly fine standards, for what they
are.
Doug McDonald |
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Dal
Guest
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| Posted:
Tue Nov 08, 2005 4:08 am Post subject:
Re: DAB for Mobile DTV |
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K. B. wrote:
| Quote: | On Sun, 06 Nov 2005 12:24:16 -0600, Doug McDonald
mcdonald@SnPoAM_scs.uiuc.edu> posted:
DAB is simply a distrously stupid standard. Yes, it is COFDM,
but it simply badly designed. NOONE should use it for anything.
Could the problems with DAB be mitigated by adding a layer
of error correction to the mobile DTV portion of the
datastream?
Kirk Bayne
alt.video.digital-tv Home Page
http://www.geocities.com/lislislislis/avdtv.htm
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Yes. It has already been done. Often referred to as DMB or DABv2. |
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JamieS
Guest
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| Posted:
Tue Nov 08, 2005 5:41 am Post subject:
Re: DAB for Mobile DTV |
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Dal wrote:
| Quote: | K. B. wrote:
On Sun, 06 Nov 2005 12:24:16 -0600, Doug McDonald
mcdonald@SnPoAM_scs.uiuc.edu> posted:
DAB is simply a distrously stupid standard. Yes, it is COFDM,
but it simply badly designed. NOONE should use it for anything.
Could the problems with DAB be mitigated by adding a layer
of error correction to the mobile DTV portion of the
datastream?
Kirk Bayne
alt.video.digital-tv Home Page
http://www.geocities.com/lislislislis/avdtv.htm
Yes. It has already been done. Often referred to as DMB or DABv2.
Or T-DMB not to be confused with DMB-T designation used in China for a |
nascent DTV standard.
JSS |
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Dal
Guest
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| Posted:
Thu Nov 10, 2005 5:05 am Post subject:
Re: DAB for Mobile DTV |
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JamieS wrote:
| Quote: | Dal wrote:
K. B. wrote:
On Sun, 06 Nov 2005 12:24:16 -0600, Doug McDonald
mcdonald@SnPoAM_scs.uiuc.edu> posted:
DAB is simply a distrously stupid standard. Yes, it is COFDM,
but it simply badly designed. NOONE should use it for anything.
Could the problems with DAB be mitigated by adding a layer
of error correction to the mobile DTV portion of the
datastream?
Kirk Bayne
alt.video.digital-tv Home Page
http://www.geocities.com/lislislislis/avdtv.htm
Yes. It has already been done. Often referred to as DMB or DABv2.
Or T-DMB not to be confused with DMB-T designation used in China for a
nascent DTV standard.
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Good Point. The terminology was changed to try and avoid confusion.
You will still find some material about DMB-T which is referring
to T-DMB. Not sure what is happening with the Chinese system,
it is a bit different from some of the other COFDM systems. |
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