"Paul Ratcliffe" <abuse@orac12.clara34.co56.uk78> wrote in message
news:slrnbkcuid.9q7.abuse@news.pr.network...
> On Fri, 22 Aug 2003 09:23:28 GMT, Steve Roberts
> <steveroberts@compuserve.com> wrote:
>
> > On Fri, 22 Aug 2003 08:37:17 GMT, Paul Ratcliffe
> ><abuse@orac12.clara34.co56.uk78> wrote:
> >
> >>Sure it does. Lines 21 and 334 appear to be the BBC standard for 888
> >>subtitles.
> >
> > Line 20 and 333, surely?
>
> Er, now you've got me thinking. You could well be right. I ended up
> (re)configuring an inserter a couple of months ago and the old grey matter
> came up with those numbers, but it doesn't work as well as it used to.
> Anyway, the principle is the same and you can record it on to Beta SP.
>
> > We use 19/332 and 21/334 for VITC.
>
> Yeah, I know, but that should never get to the transmitter.... which sort
> of implies those lines get masked somewhere, which makes it unlikely to
> be the same lines as the subtitle data.
> OK, you win, but I'll check on Tuesday all the same :-)

He's correct, subtitles are on lines 20 and 333. The subtitle inserters or
police units in the output chains will blank lines 19/332 and 21/334 to stop
VITC going to air.