FreeView DTT Frequency Plan

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#90288 9-Oct-2007 17:17

Phew! That's good news.. 1080i is a dinosaur!

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#90385 10-Oct-2007 06:29

sbiddle: Based upon comments from people during the UK MPEG4 trial it may be pushing it. A high end P4 seems to be the bare minimum with a dual core being required for HD stuff.

That should change though if manufacturers start releasing MPEG4 decoders? Although if they do use HDCP then a P4 is out anyway.

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#90386 10-Oct-2007 06:37

Nety:
sbiddle: Based upon comments from people during the UK MPEG4 trial it may be pushing it. A high end P4 seems to be the bare minimum with a dual core being required for HD stuff.

That should change though if manufacturers start releasing MPEG4 decoders? Although if they do use HDCP then a P4 is out anyway.

I don't know whether we will ever see onboard MPEG4 decoding on the TV cards as their is no real point. What format would they transcode the MPEG4 stream into?

Artifact

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#90401 10-Oct-2007 09:19

phatbox asked:

Does anyone know when it might be transmitting in Chch besides the "early 2008" it says on the Freeview site. I have a UHF aerial and also a DVB-T card I used in the UK and am wondering if its worth holding out for a few months to save installing a satellite.

Christchurch is on-air now, with a test loop being broadcast. Try your tuner and see if it works.

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#90414 10-Oct-2007 10:48

Artifact: phatbox asked:

Does anyone know when it might be transmitting in Chch besides the "early 2008" it says on the Freeview site. I have a UHF aerial and also a DVB-T card I used in the UK and am wondering if its worth holding out for a few months to save installing a satellite.

Christchurch is on-air now, with a test loop being broadcast. Try your tuner and see if it works.

Just done a scan in Auckland and nothing up at the moment as far as I can see.

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#90436 10-Oct-2007 12:04

sbiddle:
Nety:
sbiddle: Based upon comments from people during the UK MPEG4 trial it may be pushing it. A high end P4 seems to be the bare minimum with a dual core being required for HD stuff.

That should change though if manufacturers start releasing MPEG4 decoders? Although if they do use HDCP then a P4 is out anyway.

I don't know whether we will ever see onboard MPEG4 decoding on the TV cards as their is no real point. What format would they transcode the MPEG4 stream into?

Well they all do MPEG2 now so surely they will just replace that with a chip that can do MPEG4 and MPEG2. As far as what format I am not sure. What do the current ones do?

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#90458 10-Oct-2007 13:31

Christchurch is on-air now, with a test loop being broadcast. Try your tuner and see if it works.

Based on the frequency-plan table which UHF channels are they testing on?

Also what resolution is the test signal in?

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#90460 10-Oct-2007 13:42

Nety:
sbiddle:
Nety:
sbiddle: Based upon comments from people during the UK MPEG4 trial it may be pushing it. A high end P4 seems to be the bare minimum with a dual core being required for HD stuff.

That should change though if manufacturers start releasing MPEG4 decoders? Although if they do use HDCP then a P4 is out anyway.

I don't know whether we will ever see onboard MPEG4 decoding on the TV cards as their is no real point. What format would they transcode the MPEG4 stream into?

Well they all do MPEG2 now so surely they will just replace that with a chip that can do MPEG4 and MPEG2. As far as what format I am not sure. What do the current ones do?

Most DVB-T cards don't do any decoding, that's why most cards will work with the new MPEG4 broadcasts. All they do is pass the DVB stream to the PC to do all the decoding. Decoding MPEG2 is easy however MPEG4 requires a much faster PC.

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#90971 14-Oct-2007 10:20

Cancel Mt Erin Sky 27, 31, 43 & 59 and Kordia 47

Does that mean they are going to cancel the sky UHF channels to make space for the DVB-T transmissions?

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#90984 14-Oct-2007 13:15

great news, glad to see Wharite is amongst the first. Not sure what the line of sight is like to it from where I live though.

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#90990 14-Oct-2007 14:18

I have seen a map on some web site that shows the location of the transmission towers but foolishly did not book mark it.. Does anyone know what is is?

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#90992 14-Oct-2007 14:34

http://www.lincrad.co.nz/transmittersites.html. This hasn't been updated for sometime so doesn't include the changes required for DVB-T.

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#90993 14-Oct-2007 14:35

Nety, try here.

Kirjava, no Mt Erin currently uses 29,33,45,53,57,61 for Sky, Prime and MTS, they will not be effected. However Sky presumably has unused management rights at Erin for 27,31,43,47, these have been canceled and awarded to FreeView.

Essentially nationwide Sky has management rights to channels 27-34, 43-46, and 51-54 as does TVNZ to 47-50, Prime to 59-62 and TAB 55-58. So at anyone site you will find Sky will use channels it has rights to as meets technical criteria (ie interference with nearby sites, and 4ch minimum between Txs etc), and the same goes for other right holders services. There is also a Maori reserve 35-38 and a non-commercial reserve 39-42.

Due to current channel allocations at each site the right holder cannot use all of its allocation at each site, therefore those channels that the holder could use but has no commerical intention or ability to (ie Sky has no intention of increasing its analog service) have been canceled and awarded to FreeView.

Further its normal practice to operate analog Txs on anyone site 4channels or more appart, however it is possible to interleave digital Txs at two channel seperation, this is due to the fact that digital demodulators are better at rejecting (or not been effected) by near or adjacent channel energy, and also that due to the more gaussian distribution of energy across the digital transmissions they dont upset analog demodulators as much as two analog Txs at 2ch seperation would.

Cyril

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#90996 14-Oct-2007 16:13

Sony UK has X series LCD TV's with MPEG4 Digital Terrestrial Tuners in them already (KDL-46X3500), so the manufacturers already have the technology. Its now up to the NZ distributors to start bringing in the latest models rather than the hand me downs that they have been pushing on us for years.

I have heard that Sony NZ is about to replace the X200 (very old in the rest of the world) with an X300 in a couple of weeks, but alas no Digital Tuner in sight.

Guess we will have to wait until they fob of that stock before they can bring in the 'new' technology.

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#91007 14-Oct-2007 17:52

Reading those notes on the side. Does that mean that other towers could relay the initial signal? For example in Wellington, Baxters Knob could boost the signal provided to it from Kaukau for those in northern Wellington?

I think Cyril may have referred to this on P1, but what he said when a bit over my head.

The statement "Cancel Kaukau TVNZ 48 and Fitzherbert/Baxters Kordia 50" prompted this thought.

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