pixel aspect ratio + svcd + FitCD

[Wilbert]

Suppose I captured from my PAL TV to 704x576 and cropped to 704x528. Finally I resized to 480x576. Using the program FitCD (I'm encoding to svcd with dar 4:3) it says that the real aspect ratio is 1.3657:1.

If I didn't read the page

"http://www.uwasa.fi/~f76998/video/svcd/faq/#1.1"
(pc: pixel aspect ratio of 1:1, tv: pixel aspect ratio of 54/59:1 ?)

I would say that the real aspect ratio has to be 1.333:1.

My question is where is this ratio 1.3657 coming from? Mustn't it be 1.333*59/54 = 1.457:1 or something like that ?

Please help, I'm getting a headache of all this stuff.

[Pre]

Hello again.... I'm not far from an expert on this area. But if you check the ITU-R BT.601-4 button,in fitcd, i guess you will have a pixel ratio of 1.3333. It's explained in the help file

[Wilbert]

If you check or uncheck that button has no influence on the real aspect ratio of resizing, that remains 1.3657:1 in my case. It has only influence on the real aspect ratio before resizing. Unchecking that button gives 1.3657:1 instead of 1.3333:1 (note that the resolution is 704x528 PAL).

What I want to know is where is that number 1.3657 coming from? I only see ratio's like 59/54 in that webpage.

[802701]

[480 * 1.5 * 59/54] / 576 = 1.3657

That´s the correct aspect ratio of every 4/3-SVCD for TV-Sets according to ITU-R BT.601-4 combined with SVCD-Specs

SVCD will be shown on TV with 720 Pixel (Player scales 480 to 720).
Now TV-Pixelform is 54/59 (y/x) according to that norm.
So you finally get 720 / (54/59) which has to be divided through vertical resolution of 576 pixels to get real aspect ratio.

Much more simple calculation which says the same:
1.25 / (54/59) = 1.3657