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<DIV>There were a number of color systems proposed. The US went to NTSC
first. Then the Europeans developed two competing 625 systems, PAL
and SECAM. These were both competing with 4.43 MHz NTSC that was being
pushed by RCA and others. There are issues with all color systems.
the editing was a difficult thing when you had a four field color frame in NTSC
and an 8 field color frame in PAL. </DIV>
<DIV> </DIV>
<DIV>Now after the Europeans had a split decision (based more on politics in my
opinion,) then the rest of the world followed with their choices.</DIV>
<DIV> </DIV>
<DIV>Brazil was the odd ball. They went with a PAL system for 525 lines
called PAL-M. It had to be difficult for manufactures to come up with an
odd ball piece of equipment for one market only. As an example. AMPEX made
an AVR-2 for PAL-M. The engineering cost of this could only be spread over
a small number of machines. </DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV>WA8IGN</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 4/30/2012 7:50:39 P.M. Eastern Daylight Time,
DennyD1@verizon.net writes:</DIV>
<BLOCKQUOTE
style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial><BR> On Apr 30, 2012, at 7:53 AM, John
wrote:<BR><BR>> We never used the heterodyne process here in Aus as far as
I know, <BR>but I was looking through the tender documents for our first
VR1100 <BR>and at one point it was stated that the machine must be
capable of <BR>being "modified to record and play back an NTSC signal
recorded at 625 <BR>lines". Of course this was when PAL was still in the
Lab. Does anyone <BR>know if any work was done running NTSC on
625?<BR><BR> I offer:<BR><BR> What
you're describing sounds an awful lot like the Brazilian color <BR>TV
standard, a unique version of NTSC.<BR><BR>
Dennis Degan, Video Editor-Consultant-Knowledge Bank<BR>
NBC Today Show, New York<BR><BR><BR><BR><BR><BR>Please trim posts to relevant
info when replying.<BR><BR>Change subject to reflect thread direction.
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