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Old 26th August 2009, 12:33   #6  |  Link
GodofaGap
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Join Date: Feb 2006
Posts: 823
Quote:
Originally Posted by an3k View Post
Thanks for the info. Didn't know that. I think you mean 704x576 cause then the whole calculation is correct:
No I mean 702. 704 or the resulting 16:11 is a simplification.

ITU-R BT.601 defines that PAL systems have a 52 µs active line lenght and a 13.5 MHz sampling rate. 52*13.5 = 702 samples per line.

Quote:
But now the question is, why does the ITU recommend 704x576 while the whole world (as long as they use PAL uses 720x576?
It's perfectly OK to use 720x576 as long as it is understood that 702x576 represents the actual 4:3 or 16:9 picture. In other words 720x576 is actually a little wider.

One of the reasons why normally 720 is used is to allow for inaccuracies in timing during analog to digital conversions.

It is however very difficult to know if a DVD is produced with ITU standards in mind or not.

Quote:
I guess i install 3.11alpha again - best divx i've ever used
And also doesn't have PAR

Last edited by GodofaGap; 26th August 2009 at 12:36.
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