CompuServe Messages

#PAR & S-VGA aspect ratio

    10-Apr-95 23:52:27
Sb: #PAR & S-VGA aspect ratio
Fm: T-Spect Le 74553,2760
To: A L L
752/480 = 1.5666…. 640/480 = 1.3333…. I'm very confused about the calculation of the PAR and the NTSC out rendering. Now I'm setting the AR of 0.851 for 752×480 output. To minimize rendering time & increased productivity, I decided to 3DS VIBCFG the rendering screen to only 640×480. I set the custom ratio of 640x408x.851 (just same as the 752×480) [So far that AR is 640/408=1.568] However, when I use the 3DS's SAFE AREA feature, I noticed that they don't match between the two! I JUST DON'T KNOW THE EXACT FORMULA TO CALCULATE THE DISPARENCY. But I manage to eyeball and came w/ the ratio of 0.72 . The calculation was [640x[/]408×0.72=1.129, not 1.333] Is this corrrect or not? If it is, then how could it logically be? (The safe area window matches w/ the AR @ 752x480x.851 .)