Date   : Wed, 03 Aug 2011 06:15:59
From   : ats@... (Adam Sampson)
Subject: [BeebSoc] Auntie, dear Auntie

Rick Murray <heyrick.beebsoc@...> writes:

> but then how many domestic capture devices permit that part of the
> screen to be captured?

I never said anything about using a domestic capture card. ;-)
(Or an unmodified VCR, come to that...)

The decent cards do, though, often providing a high-quality "raw VBI"
mode that gives you better resolution than for the image itself; it
makes more sense to do Teletext/CC decoding in software than hardware
these days. The very common Conexant CX88 chipset gives you 8-bit
samples at 35MHz, for example.

Thanks,

-- 
Adam Sampson <ats@...      >                         <http://offog.org/>