Hi, I've been reading a few comments about progressive scan and deinterlacing I'd like to try and clarify, as well as trying to find out some more technical information so that I can see if there are any differences between DVD players and televisions. Some people appear to be confusing deinterlacing with true progressive scan and are using the terms interchangably. As I understand it, from my own work in video (I'm a professional cameraman and editor as my day job) a DVD can be encoded as either interlaced or as progressive scan. Now lets take some of my own footage as an example. I usually shoot in true 25 fps progressive scan for many projects I produce. This means that the camera is recording the full 576 lines. When I edit, because the signal is recorded to an interlaced format (PAL), but with both fields carrying information from the same frame, I need to tell my software I am using progressive footage. Then, when I encode the final DVD I need to specify to the MPEG2 encoder that I am using progressive scan footage. This way I keep the absolute full resolution of the progressive scan picture. Many commercial film DVDs are also encoded in true progressive scan. This means that when you use these DVD's on a progressive scan DVD player they simply output the full progressive signal through component for example. There should be NO deinterlacing taking place whatsoever, contrary to what has been said in other threads. Why have I mentioned this? De-interlacing usually involves ditching half the resolution of an interlaced picture by taking the dominant field and doubling it. Some very clever deinterlacing systems will look at the motion of the picture and only deinterlace those aspects which are moving. This still removes resolution but is slightly better in some cases. Regardless of the method deinterlacing removes resolution. On some of the other threads people have said that whether you buy a progressive DVD player or not depends on whether your TV does a better deinterlacing job than the player. I find this highly odd, although I am open for correction if anybody knows any better. In order for your TV to display the true progressive scan picture from a progressive scan DVD it would need to read the odd and even fields and combine them into one frame (because 25 frame progressive displayed in a 50i signal the odd and even fields will be the same). However I doubt most televisions deinterlacing circuits work this way because many TV's these days convert broadcast signals to progressive scan as well. The combining of fields into one frame will not work for a true interlaced source. Line doubling or interpolating will however, but this loses resolution as I mentioned. The long and short of it is that IMO the only way you will get the true full progressive scan picture off a progressive scan DVD is to use a progressive scan DVD player through component into a TV that can accept and display the incoming images progressively with no field manipulation. This is because there is NO deinterlacing involved as the DVD is encoded in progressive form to begin with. Some people have mentioned jagged edges on progressive scan pictures. This could be down to the fact that you are seeing the picture resolution in one go rather than with the interlace flicker to cover it up. 576 lines is not an awful lot. The other problem could be down to edge enhancement added either during the DVD encoding process, or by the DVD player, or by the TV, or a combination of all three. This would have the effect of increasing aliasing on high frequency edges. So to sum up, the reason I posted this is because true progressive scan and deinterlacing are two completely different things that seem to becoming muddled up on some of the other threads in this forum.