[opendtv] Re: --FCC OKs WiFi between TV channels
- From: Bob Miller <bob@xxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 25 May 2004 17:53:23 -0400
Manfredi, Albert E wrote:
>Bob Miller wrote:
>
>
>
>>Freeview is taking advantage of antennas that are already
>>there.
>>
>>
>
>And why can't ATSC do likewise? I certainly plan on this being
>the case here as well.
>
>
>
>>In many
>>cases they are putting up new antennas but in far more cases it works
>>with indoor antenna.
>>
>>
>
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>
Just reading Digital Spy and I have talked to a few people. I would
rephrase my statement. Most people just hook-up to the antenna they
already have. Of those who try indoor it seems to work for many. They
only have 88 transmitters and the average power is like ONE kW so there
would be a need for rooftop antennas. Surprising numbers on sales today.
500,000 in first quarter or the same as they sold in the Christmas
quarter. That would suggest that sales this year will be at least 50%
higher than last year.
>Do you have anything to support this statement, because even at the
>lower bit rate they had to fall back to, I find it hard to believe.
>
>You're claiming that the vast majority of Freeview users use rabbit
>ears. That would mean they are all located within at best 12 miles
>of the transmitter (using the Berlin SFN example for which we have
>the contour, but which might not apply exactly to the UK service).
>
>
>
Actually didn't mean to state that. I don't know how many use rabbit ears.
>>The goal should be to have the best modulation possible and if that
>>means that we no longer need cable or satellite good
>>riddance.
>>
>>
>
>Don't think that's realistic. DBS and cable will continue to have
>a lot more spectrum than OTA, so it's hard to see how OTA can
>provide the same level of program choice. Not to mention the
>reception problems that are sometimes easiest to solve with either
>cable or DBS, no matter what modulation you care to use.
>
>Bert
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The limiting factor seems to be how much video the average home can handle.
I don't think the number of channels is that important in the future.
With hard drives getting less expensive while also getting smaller in
physical size and larger in storage size the channels that you do have
can deliver 24/7 to cache. And those channels can deliver how many SD,
HD or ED programs with WM9 or MPEG4? And it is the mix of Internet, OTA
broadcasting and even wireless local mesh networks that will eliminate
cable and satellite. I just think their infrastructure is to expensive
to build an maintain. And how many channels of SD, ED or HD could be
delivered in the spectrum below channel 51 if we built a co-located SFN
in any market?
Met with a compression company today that is visiting CEBIT. They claim
that they can combine codecs to get even more efficiency out of the
spectrum and keep the receiver up to date as new or improved codecs come
along. They claim HD in 3 Mbps and said they demonstrated same at NAB.
And 3 Mbps was the spike level so they said.
First as to reception problems lets take satellite off the table first.
I had to drop Dish because of outages due to storms here in Manhattan.
Next cable hey I think I would have better reception from COFDM and the
new improved 8-VSB (from the glowing remarks today) than from cable.
Especially if we had multiple transmitters in an SFN instead of a big
stick approach.
Then there is the PtoP pencil thin beam radios in the 60-70-80 GHz
range. If deployed in a mesh network within their parameters they would
be the ultimate in reliability. No reason we all couldn't be connected
to each other with such radios in say 5 or 6 years. Right now they do
Gig and 2.5 Gig but they will do 12.5 Gbps in 2 years. From talking to
the engineers the guts of these radios is super simple and if the
quantity is there the price can be very low.
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