26 May
2010
26 May
'10
11:52 a.m.
I can't speak for PAL and SECAM, but the NTSC
standard most certainly
does specify the number of vertical lines, interlace, and horizontal and
vertical sync frequencies. It had to, since the frequencies are
different than the sync frequencies used for its predecessor
black-and-white system (525/30). The original NTSC standard included
both 525/29.94 and 441/30 scan rates, but the latter was dropped at the
last meeting of the first NTSC on 8-March-1941.
What is the offiical name for a composite colour signal (of any scan
rates) which uses QAM-encoded colour signals but without the
alternate-line pahse switching of PAL?
While there exist other unofficial NTSC-related systems such as the
so-called "NTSC-J" and "NTSC 4.43", these are NOT part of the NTSC
standard. While it is possible to use NTSC-compatible color encoding
with different scanning parameters, the result is *not* NTSC.
True, but what should it be called?
-tony