Quote:
Originally Posted by Gainnothing
How does 702 come into play? And how did we get 702?
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I got it from you.
Quote:
Originally Posted by Gainnothing
From article here are the specs for DVD NTSC
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Sampling Matrix:
720 x 480
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PAR:
4320/4739
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If you accept that chart you posted as the authority, and 4320/4739 is your PAR, and you apply that 640 width, then
4320/4739 =
0.91158472251529858619962017303229
The reciprocal of which is:
1.0969907407407407407407407407407 * 640 =
702.07407407407407407407407407407
You can call it "702" for brevity. Most people would simply call it 704 because it is a better number to work with (704 % 16 = 0), an appropriate standard, and the result of using the industry-standard 10/11 PAR for 4:3 NTSC DVD.