Progressive vs Interlaced
by HenningHigh Definition BLOG has some thoughts on the whole progressive versus interlaced dilema.
It is a fact that 720p is better for fast motion over 1080i. This is true but less for the progressive vs. interlaced argument given than the difference in frame rates. The 60fps video captures movement in half the distance than 30fps does. Stated another way, if we have an object in motion when it is captured at 60fps the distance the object has moved frame to frame will be half of the distance the object has moved when captured at 30fps. Now if we ignore every other factor, it should be clear that the motion would be smoother at 60fps than 30 fps. There is the little matter of resolution though, because the distance we see is the number of pixels the object has traversed. With the difference of 1920 vs. 1280 and 1080 vs. 720 the difference does not end up twice as smooth at 60fps vs. 30fps.
It’s a rather lengthy article, so I won’t try to summarize it all.




