You may conclude from your experience of interlaced TV pictures that there is nothing wrong with it at all! Indeed, up to a certain size of image at typical viewing distances and viewing environments, interlaced video is more than adequate and has been enjoyed by many millions of people around the world for a very long time.
On a typical or average TV found in most living rooms, it is only with certain types of images that the most obvious artifacts of interlaced scanning reveal themselves. Such images are those that imitate the sort of graphics, menus and text formats you may take for granted on your typical PC desktop or application. However, these images are becoming more common with the advent of email and web browsing facilities offered via digital TV along with the slick design of TV program guides and other on screen displays.
Further more, if progressive scanning is to be used then it is imperative that the interlaced to progressive conversion is performed to a very high standard. Otherwise the only way presently to guarantee the preservation of vertical detail in an originally interlaced image, is to leave it interlaced.
With the exception of the finely detailed, mostly stationary onscreen displays mentioned above, the benefits of progressive scanning become more desirable, if not essential, with larger displays. For example, direct view CRT TVs over about 32inches and home theatre projection systems with images of just about any size, but typically between 5 and 10 feet wide, will benefit most of all from high quality interlaced to progressive conversion.
As you might expect, it is when we begin to enlarge the video image to many times the size it was ever designed for that its limitations start to become blatantly obvious and need to be compensated for.
http://www.progressivescan.co.uk/interl ... ages.shtml
Edited By ganti on July 24 2002 at 15:39