Dave Woodman wrote:
> The mechanism that was used in early TV sets to achieve the
> correction was rather interesting:- the set contained a glass block,
> with an ultrasonic transducer at each end (one sending, the other?
> well, no prizes for guessing!). The delay in the block was one
> transmitted line so the output could be directly compared with the
> following line. Ah, the wonders of old technology...
Old technology? Does that mean there's some newer version of
the standard PAL delay line that I wasn't previously aware of?
I thought all PAL sets (and video recorders?) used a glass delay
line in this manner.
--
John Honniball
coredump_at_gifford.co.uk
Received on Sun Jun 16 2002 - 16:14:06 BST