On Sun, 19 May 2013 20:56:38 +0100, Kennedy McEwen
<
r...@kennedym.demon.co.uk> wrote:
>>Both PAL and NTSC encode/decode processes
>>were designed to be transparent (RGB in, RGB out) and as long as
>>everything was correctly lined up,
>
>Yes, but the emphasis on that caveat was much more important with NTSC
>than it was on PAL.
>
>>at least in the studio environment
>>you couldn't tell them apart.
>>
>Only if you were unconcerned by the ~20% lower resolution of NTSC or
>unsusceptible to the 20% lower frame rate of PAL. Few who had "grown
>up" with one were tolerant of the limitations of the other.
The numbers may suggest there would be huge differences between the
appearance of the pictures, but in reality, with real pictures rather
than test charts, all other things being equal and everything
correctly lined up, it was very difficult indeed to tell them apart.
>Nevertheless, most viewers didn't watch TV is a studio environment, and
>the importance of the caveat you mentioned previously meant that, for
>the general viewing public, NTSC produced less realistic and more random
>colours (or should that be colors?).
Yes, the transmission path to the viewers' homes is clearly where a
lot of the quality loss occurred. Maybe the programme makers in
America have a different attitude to quality of equipment and care
taken in studio lineup too, as material which had been originated
there often looked a bit dubious even directly off tape. However, on
the few occasions when I was involved in the making of NTSC programmes
at Television Centre, using the same cameras and monitors we normally
used for PAL, there weren't so many dots on the vectorscope but
otherwise everything just looked exactly the same as usual. It was, as
we used to say "All right leaving us".
Rod.