[opendtv] Re: (S) DTV adaptors available for less than 50 euros
- From: "John Willkie" <JohnWillkie@xxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Sun, 25 Sep 2005 20:48:06 -0700
Olivier;
We are in agreement that increased compression could result in greater
impluse noise problems, and time-interleaving seems to be a good way to deal
with impulse noise. That's why I'm surprised to hear it's a problem with
OFDM broadcasts; DVB proponents (cue Dermot) told us that this problem was
solved in 1999, and things were only getting better.
----- Original Message -----
From: "Olivier Houot" <olho_avatar_i@xxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Tuesday, September 13, 2005 3:09 PM
Subject: [opendtv] Re: (S) DTV adaptors available for less than 50 euros
> >Does that 49 Euros include the 18% VAT?
>
> >Bob Miller
>
> Yes , as Donald has pointed out, sticker prices include VAT. 49 euros is
> the price you pay to take the good away .
>
>
> John Willkie wrote :
>
> > Highly unlikely, Olivier, that there will be greater problems --
> > funny, I
> > thought there were none -- with sensitivity due to codecs. Transport
> > streams is transport streams. Either you get the transport stream, or
> > you
> > don't.
> >
> > Codecs are one (or more, if you count adaptation headers as a layer)
> > above
> > (or below, if you prefer) the transport stream.
> >
> > In other words, if you got a signal before, you are as likely to gete
> > the
> > signal later.
> >
> >
> >
> >
> My phrasing was not accurate enough, i am afraid.
>
> The transport stream will be received just the same , all right.
> However, the group of bits wiped out by a given impulse will represent a
> greater amount of picture information, since compression is higher.
> Therefore, a given RF problem will cause a greater amount of visual
> damage with AVC. If it is part of a bigger HDTV picture, though, perhaps
> the relative impact will be the same.
>
> No system is perfect, but it is a shame not to leave opened all the
> options available in a given standard. With built-in time interleave,
> supposing it could be adjusted on the fly like the other COFDM
> parameters, we would have had another card up our sleeve to fight
> potential reception problems. Too bad it has been overlooked or
> rejected.
>
> I should not complain too much as it works for me. But of course only
> large scale statistics are meaningful to assess the overall performance.
> I don't know where reliable ones would be available for UK, or
> preferably for some other 8K european country. One thing is : if it
> didn't work good enough for a majority of people, bad word-of-mouth
> would likely have killed it long before it could have reached its
> present development state.
>
>
>
>
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