Re: Why the dumb frame rate?

[P3D <norml@xxxxxxxxxxxxx>]

It has to do with the mathematical relationships among various components of
the signal--specifically, I believe, the introduction of the 3.58mhz color
synch burst signal. The relationships needed to be chosen to minimize
artifacts such as the creepy-crawlies visible at color boundaries in the image.

Norm

>I'm sure some are tired of the endless video-signal discussions, but I'm
>about to contribute to it.  I welcome off-list replies if no one finds this
>question 3-D-relevant.
>
>Why is the NTSC frame rate 29.97?  Some sources say it happened at the
>advent of color, because the color signal "contained more information" and
>hence needed more time.  This doesn't sound right.  I read a more compelling
>story about an old theory (now disproven) that an exact 30 Hz rate would
>cause a problem.  I don't remember what the theoretical problem was.  Does
>anybody know?
>
>Gavin
>
>
>


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