Axiom Home Page Forums General Discussion Technical Questions 720p vs. 1080p

I'm glad I came across this post. My dvd player is sending 1080i information to the monitor but in progressive mode. Should I change it to 720p or change the mode to interlace and leave it at 1080i?

Thanks,
John

you might disagree but thats besides the facts. even the people who make them acknolegde that 480p is the best it can get for dvds. So mabey it does look better to you in 720p or 1080i but its still a 480p dvd. which puzzles me why you would want to convert it to anything else. mabey it does look better to you but why would you tell me or anybody else that it well improve the picture. Mabey for you it does but for 99% of other people it don't. i've had this disscusion with you before. your eyes might see a difference but the fact is its a 480p dvd which means 480p is the best possible veiwing mode for it. so everytime you argue your point. mabey it does work for you but it don't for most. mabey its your eye sight. i hear a lazy eye can make things much more to your liking if you keep only one directed at the screen.

also sirquack i have owned many projectors over the past 10 years. so my answers due have some merit. Personally half the replies at avsforum are no more comments by people such as yourself or i. experminting with there projectors. So before you go as far as to say the majority of people agree with you at any forum is complete b.s. Phone anybody truly thats knows anything about projectors would not argue over something as striaght forward as this. But some due find it hard to sink in. i like to think my car could be a porsche but at the end of the day it is what it is. the same as dvds they are 480p not 1080 not 720. it doesn't matter if you have an onkyo sp1000 for 2000 grand it ain't going to make it any more then it is. well except mabey for you. you are truly lucky then.

OK, I'll be the first to admit that I don't have a lot of knowledge in this area, but aren't the displays pretty much all fixed format (eg. 720 vertical native, 480, 576 etc...) ? In other words, whatever you feed into the projector is going to get upconverted anyways, the only question is (a) what does the upconverting (player, receiver, projector) and (b) what refresh rate goes out to the actual display device ?

Some TVs now seem to automatically de-interlace when you send them XXXi signals, so it seems to me that any two people with even the slightest difference in system configurations are going to have a totally different experience in terms of whether or not changing from one player mode to another makes a visible difference.

dvds are 480p until that is changed thats all they can be. yes you can convert it to 720 or 1080. but that is pointless simply because its a 480p disk. so to buy a projector to convert a dvd to 720 or 1080 is like pissing in the wind. Its simple dvds can not be converted to a true 720 or 1080 simply because there decoded as 480p. Hence even if you put your projector too 720 or 1080 it isn't displaying that disk truly to that level. being that they are a 480p disk. go to projector central and read what they wrote about what type of projector is best suited for dvd veiwing. they state 480p is all you need and anything else for dvd is a waste of money.

bridgeman take a look at projector central. it on the front page under commentary. the article is called choosing a resoulution. It'll explain my point to the fullest. hopefully sirquack takes a look to. mabey then he can see his arguing was in vain. It always pays to know before you speak.

I think Sirquack and others are discussing a different question :

"Assuming that I have already decided to go with a reasonably priced projector capable of displaying off-the-air HD content (720p or 1080i) at native resolution, which of those two resolutions is going to work best for me ?

I think there probably is agreement here that for DVD only going with a 480p projector is going to be at or close to the performance limit (I say close becuse it seems believable that a really good scaler plus a higher resolution display could look better (less pixellated) than a 480-line native projector).

John, I agree with your summary on the projector/player question, but more importantly, my grenades are filthy and certainly need washing, but your links don't connect.

Not sure why I'm having so much trouble with the link. I uploaded it to my own site, let's see how this works. My father once told me that the most dangerous job in the world was being a bored soldier (WW2 British army in his case). I think he was right.

www.interlog.com/~johnb/ht/how_to_wash_a_hand_grenade.wmv

OK. There is something wrong with this forum. There has been a battle or sorts going on with Smokey and a few other people here. There is a lot of "my stuff is better" and "I am right, you are wrong" going on that needs to stay out of the forums....

Smokey and I have been in some interesting "conversations" in the past, and for the most part, fasts play into it, but not always.

I am not trying to start a battle with Smokey, but when he himself makes accusations about facts that he himself knows nothing about, to a respected member of these forums (good ol' Sirquack), I get a little ticked.

Anyway.... I have to 110% disagree, and yet agree with Smokey on this one. DVD is 480p, no doubt about it, Smokey scores 100 points. Woohoo Smokey!

A point I brought up about upconversion is that in some upconversion units, the Panasonic S97 for one, the upconversion makes a noticable improvement in picture if your display can handle the higher res image. You bet, the source is still 480p, and no, it is NOT HiDef, I agree 100% with you. Some people were mis-lead into thinking that an upconversion unit would make the image "HD" but it doesn't. It can NOT increase the actual resolution of the source.

What it can do is interpolate the image. Instead of just blowing up the image, and having a blocky, pixelated picture, it looks at the data in each pixel and calculates what it thinks would be a pixel the is between the pixels on the source 480p image. By doing this, it "stuffs" more pixels that it has created inbetween the pixels that are in the source and this allows for a 480p image to be displayed to 720p or 1080i image quality. Is it a "true" 720p or 1080i source, no way. It is, however, very good at increasing the resolution of the image to something that is better than a 480p DVD and a 720p or 1080i source.

For those people that think that this is just like blowing up a .jpg image in Photoshop or something, it isn't. I know a guy that thought that he could get a higher resolution image of a photo he took by changing the DPI from 72 (screen quality) to 600 (publish quality). What he got was a very large, blocky image. If you could take the same technology in the S97 (and others by now, I am sure) and apply it to Photoshop, you would get a 600 DPI image that may not be as sharp as the original when viewed at 100%, but is at an extremely higher resolution, and without the blocks (or "jaggies")...