Re: incompatible change to Freeview is coming

Mark Crispin wrote:
On Sun, 29 Apr 2007, mattk wrote:
Sure, although adopting it could potentially mean you'd get twice the number
of HDTV channels with no additional cost in terms of bandwidth and no effect
on current reception.

A relatively minor US market (Seattle) has 8 HDTV broadcasters. When you add in the SD subchannels and SD-only DTV broadcasters, that comes to over 30 channels of programming.

Larger markets have many more.

And all this is done without hacks like what the UK is talking about doing to shoehorn in HDTV into a system that didn't plan for it.

Alternatively the station could surely use it to broadcast practically
anything else ranging from data services to a whole load of extra SD
channels, again with no cost in terms of bandwidth, just requiring consumers
wanting to receive those additional services to buy a new antenna and
receiver... Perhaps there may be no commercial benefit in doing this,
however I don't see why you'd want to rule it out straight away.

The US system supports HDTV plus at least one SD subchannel per broadcast channel, or up to 5 SD subchannels per broadcast channel. And we do this with only 6MHz of bandwidth.

The UK can't do HDTV with an 8MHz bandwidth in a broadcast channel without resorting to hacks that require an additional antenna and receiver. And they haven't actually deployed the hack yet.

-- Mark --

They can do HD in their 8 MHz channel easily. They chose not to. That is a political decision. Has nothing to do with what they can do physically. They do not have to rely on a hack to do this.

And going with spacial enhancement to their carrying capacity is not a hack. It is used in other RF systems and is totally main stream. Think you would know such things.

And how does the fact that they have not deployed something have any meaning in this discussion? I think it was stated that they are working on it.

Please!

Bob Miller
.

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