DAB+ or HD Radio

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cyril7

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#17748 10-Dec-2007 08:14

Interesting article in todays dom on a wee storm brewing.

My personal view is that based on the Austrlian experience with DVB where commercial incubent operators were handed a RF channel for RF channel replacement for digital upgrade seems to leave them with a right to waste the opportunity. A more co-ordintated struture that DAB offers seems to make much better utilisation of spectrum.

Will be interesting to see how this one pans out.

Cyril

sbiddle

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#99196 10-Dec-2007 09:42

IMHO we're stupid not to go down the DAB+ path. The only valid issue however is VHF spectrum usage, areas like Wellington which have a large number of VHF translators could face problems. All the manufacturers are upgrading their DAB radios to DAB+ now and and the radios are now dirt cheap.

On the other hand it's easy to see why they want HD - it's effectively shutting out new competitors..

BarTender

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#99197 10-Dec-2007 09:53

And since the 170-240Mhz range as per MR 49 on the RSM web site 174 - 230 is licensed to the govt I would think DAB would be a preferable solution as well, slice and dice up the new spectrum without needing to worry about incumbent FM frequencies. However it will be interesting to see how it pans out....

lchiu7

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#99199 10-Dec-2007 10:06

Not a technical response but I would prefer HD radio if it only meant I could use cheaper US gear! We get raked over the coals still with Hifi equipment that importing US stuff is often a great way to get over that.

Staying in Wellington. Check out my AirBnB in the Wellington CBD. https://www.airbnb.co.nz/h/wellycbd PM me and mention GZ to get a 15% discount and no AirBnB charges.

sbiddle

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#99200 10-Dec-2007 10:09

Maybe Cyril7 knows how many VHF Hi transmitters and translators are actually around? Would I be correct in saying that the bulk of our TV broadcasts in NZ are VHF Lo rather than VHF Hi?

grant_k

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#99204 10-Dec-2007 10:52

sbiddle: Maybe Cyril7 knows how many VHF Hi transmitters and translators are actually around? Would I be correct in saying that the bulk of our TV broadcasts in NZ are VHF Lo rather than VHF Hi?

No, not at all. If anything, the VHF Hi band is more heavily utilised than VHF Lo, given that Lo Band signals travel much further (especially during periods of high sunspot activity) and hence cannot be re-used unless the geographical separation is that much greater than that needed for Hi Band.

cyril7

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#99213 10-Dec-2007 11:37

yep as Grant says BandIII VHF is pretty heavily occupied but there are interchannel spaces and from my understanding one of the main reasons for BCL/Kordias tests in Wellington and Auckland was to test running a BIII TV tx and DAB tx in adjacent situations.

I believe the DAB+ route is the only reasonable option, both because of its widespread use throughout Europe and other countries (Australia is a good one in point once its offically launched next year) and that it makes far better resource use due to each mux(Tx) carrying quite a number of channels.

Also concider that DAB also supports LBand Terrestial and Satellite operation, which has been licenced by the MED, so finally you could drive through the desert road and get continous service, something a bit novel. I think the success of satellite based broadcasting in NZs mountainous terrain indicates DAB-S is a good potential option. The Optus fleet does have good Lband capacity that covers NZ.

Cyril

BarTender

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#99239 10-Dec-2007 12:53

Satellite Radio.... Continuous Radio thru the desert road / no matter where we are in the country, or being able to tune into your favourite radio station no matter where in the country you are... You should know better than to talk sense. Come on this is little ole NZ we only got the Internet a few years ago

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richms

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#99250 10-Dec-2007 15:18

The problem is that hdradio doesn't use their existing channel, it makes the width of it heaps wider, also effectivly stopping them packing in more FM stations like the 0.4 spacing between some of them in Auckland. That was heavily opposed by TRN if I recall correctly and the only way that radio works got away with it is because the channels either side are theirs, and they also use the same channel in the waikato so they were only risking interference with themselves.

I would rather see 87-108 kept with analog FM and band3 for digital so that there can be more stations packed in on the analog since hardly anyone uses a crappy analog tuner thesedays the "too hard to tune" excuse is BS. Going HD radio means that it cannot happen and the chances of decent stations scoring a high power license.

The only reason that the 2 radio operators want HD is so they do not have to worry about more competition. IMO they should be grateful that they get the use of a scarce public resource and shut up.

Richard rich.ms

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#99458 11-Dec-2007 17:21

For those that care, there is a talk tonight 7:30 in auckland about this, look in the lpfm group on yahoo for details = http://au.groups.yahoo.com/group/LPFM_Radio

Richard rich.ms

cyril7

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#99460 11-Dec-2007 17:32

thanks for the headsup.

Cyril