11 Nov
1998
11 Nov
'98
9:21 a.m.
On 9 Nov 98 at 18:57, Tony Duell wrote:
I believe one is South America and the other is South Africa. I wouldn't
like to bet on it, though.
More interesting is why a PAL-N (625 line, 3.5... MHz colour subcarrier)
encoder/decoder appeared in a clearout in London. I don't know the answer
to that.
SNIP
PAL does _not_ necessarily imply 50Hz vertical,
though. It just happens
that the 2 most popular TV standards in the world are 60Hz vertical NTSC
and 50Hz vertical PAL B/G/I (those all have the same video signal
essentially). There are other PALs, for example PAL-M and PAL-N. I can
never remember which way round they are, but one is 625 line PAL (50Hz
vertical) with a colour subcarrier near 3.5MHz and the other is 525 line
PAL (60Hz vertical) with a colour subcarrier near 3.5MHz.
Who uses these other standards? I've heard that some South American
countries use different TV standards from just about anywhere else.
I've seen colour _monitors_ that will decoder almost anything (a typical
selection is PAL, NTSC3.58, NTSC4.43 (which is what some VCRs output in
the UK if given an NTSC tape), SECAM, RGB, all at 50 or 60Hz). I've not
got one (yet), though.
In sections of Toronto where there are large south-east asian populations
there is a thriving business in changing tapes to the N.A. standard. With the
right equipment it sounds like it would be trivial to do. What would be
required ?
ciao larry
lwalker(a)interlog.com
Another thing that would be great would be a VCR
that could record/play
PAL and/or 50Hz.
They're trivial to find in the UK....
-tony