I found something close to the frequency of my television

[Whoopysnorp]

Originally Posted by dagosto

That is the correct refresh rate but the television actually splits each frame up into two layers. Every other horizontal line will refresh and then the the next layer. 29.97 is drop frame rates. This is needed for color TV because of the approximately .03 FPS worth of extra information needed in comparison to black and white. Black and white TV is still broadcast at 30fps (although this is changing with HD) and if you pay really close attention sound will go out of sync slightly after a while.

Wow, I never knew that. Time to go find a really old episode of Doctor Who!

So taking into the account that every frame of video has two fields, does this mean the refresh rate for a TV would wind up at about 60 Hz?

[dagosto]

Originally Posted by Whoopysnorp

Wow, I never knew that. Time to go find a really old episode of Doctor Who!

So taking into the account that every frame of video has two fields, does this mean the refresh rate for a TV would wind up at about 60 Hz?

Kindof. The entire screen isn't refreshed ot 60Hz, but half of it is and the halves are sort of layed over each other. That brings up an interesting point too. In North America we have 30fps (or 29.97 drop frame for color) with our 60Hz Ac power. In Europe their frame rate is 25fps to go with their 50Hz AC power.