FW: Widescreen switching signals - followup

["Kenneth Watt" <kennwatt@xxxxxxx>]

Guys,

Reply from John which will explain this *way* better than I ever could.

And no-one better bollock me for the attachment as this reply would
make
bugger all sense without it and it's not exactly a bandwidth buster!

K.

> -----Original Message-----
> From: John Sim [mailto:johnsim@xxxxxxx]
> Sent: 23 July 2002 12:23
> To: Kenneth Watt
> Subject: Re: [ukha_d] Widescreen switching signals - followup
> 
> Hi Ken,
> 
> yes, looked into this.   Line 23 is rather fun!
> 
> See attached.   Here's what I said to another designer about
this
image:
> The purple
> trace is the difference between the two above it and shows that
there
is
> different aspect ratios..   The lower one is a live
trace.   These are
> captured from my DVD player.   Look at the ends of the
traces and
you'll
> see
> that the two cyan ones are different from the yellow live trace.
From
> memory, the cyan traces are when the DVD was playing, but yellow
was
just
> the DVD player's basic screen.   Essentially, the two cyan
traces have
> copyright indicated.
> 
> There would be qutie a bit of circuitry to add this to any product,
or
to
> do
> one standalone.   So £120 is expensive, but I can see where
the money
is
> going.   Line 23 should be incorporated into the source
device, and
then
> the
> price almost completely disappears.
> 
> Also, support is still patchy.   Some plasma screens will
react to
this,
> and
> the offset method.   Some TVs too.   But the best
method at the moment
is
> still SCART.   It's very much an emerging
standard.   And the killer
> product
> of the future will be to remove it and all copyright information,
but
> they're working on more laws to make it a very big offence to do
so.
> 
> I've already found (via a customer) that if you were to take a
D-VHS
> recorder and tape the output from a DVD player via the converter,
you'd be
> able to do this in S-VHS mode, but copy prohibit comes up with
D-VHS.
I
> can only presum that it was Line 23 that was preventing him from
making
> D-VHS copies.
> 
> The ultimate solution, or at least my opinion, is to make software
more
> accessable.   Virgin, HMV, Tower etc all sell CDs at £14+,
yet I can
go to
> www.cd-wow.com and have them delivered to my door for £9.  
And these
are
> brand new CDs, in the top 75.   Same is true to a lesser
extent with
DVDs
> via Play.com     People will always find a means
to create a back up
for
> friends, but would they have purchased anyway?   If not,
nothing has
been
> stolen.   Certainly, people do share their
titles.   Therefore, I'd
> suggest
> making a more streamlined manufacturing process for CDs/DVD which
is
able
> to
> react quickly to demands of the consumer, and only to make as many
of
a
> title as demand dictates.
> 
> All the best,
> 
> John.

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