[opendtv] Re: Food for thought
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 21 Feb 2007 14:35:10 -0500
Bob Miller wrote:
> To me the quote says that EVEN if using MPEG-4 the trade
> off between SD and HD is STILL "three or four standard
> definition channels".
>
> They don't say anywhere what the trade off would be if
> they used MPEG-2.
A little creative intepretation, I see? The simple fact is, however,
that BBC SDTV continues to be H.262. So what they are saying here is
they need more spectrum for HDTV. The H.264 applies ONLY to HDTV, as of
now, in the UK, with the possible exception of this future Sky
by-subscription DTT tier.
I wonder why there's so much resistance to this notion. After all, we
knew all along that one of the biggest improvements allowed by H.264 was
to move the I frames further apart, and we knew all along what that
probably meant for practical implementations. Right? It should not be
such a big surprise that the savings would not be as much as
theoretically possible.
Not only that, but it should be a relief for broadcasters. They can
charge ahead without having to think they are so heavily compromised.
The spin doctors might be disappointed, but those who depend on this
stuff for a living should instead breathe easier. No excuse to sit
still.
Bert
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