Back to basic, I've been thinking about this for a while, and still cant get it. What does high scan rate buy me ? I mean I understand you run 480p with 540p timing to fix the overscan and enjoy the 33.75Khz scan rate. But what does 33.75Khz buy me over regular 480p timing(forgot the scan rate for 480p). Isnt scan rate a frequency of a horizontal line drawing. Hence to make it 30 frame per second, scan rate has to be such that,
1/(scan rate) * (active # of horizontal line + associated blanking, etc) = 1/30 frame/sec
1/30 frame/sec is a fixed number. So if you change the scan rate(33.75Khz 540p), and keep the active # of horizontal lines to 480p, you must increase the # of blanking lines. This means that time you saved drawing a line using a higher scan rate, goes to blanking. You still end up a frame that consists of 480p lines in 1/30 sec. So I cant imagine how it is supposed to improve the picture... Well, using higher scan rate actually looked better on my set, and dont understand why...