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Does 1080i look better on a 720p display than 720p?

post #1 of 9
Thread Starter 
Ok, I know this may sound ludicrous to you, but I am dealing with parents which should explain alot.

I stopped over their house yesterday and brought over my extra HD-A3 and Transformers which they had not seen yet. They have a Toshiba 62" 16:9 RPTV which they told me was 1080i, and I have always assumed this was true. They have this weird "netcommand" feature so I had to program their HDMI input which it calls "M-Link". After scanning through their manual, I decided to check their specs. Low and behold it is a 1280x720 DLP chip. I tell mention to them that their set is actually 720p and not 1080i and that it is emulating 1080i... then I had to back track and try and give them an explanation why 720p is better than 1080i.

My mother felt like I was insulting her saying that theirs was 720p (as it was a lower number).

I showed her back and forth how it looked between the two and that her Cable box was taking the 720p signal, breaking down to 1080i sending it to the TV, and then reconverting it to 720p OR taking 1080i, sending it and converting it to 720p. Then I had to try and explain why some stations broadcast at 720 like Fox, ESPN, Disney and others like NBC do 1080i.... and then reexplain that she wasn't really getting true 1080i anyway.

My dad understood and agreed that setting it to 720p did look better, but she insisted the that it didn't (on 720p stations) and that her TV was "HD" and not only 720p:confu sed:

Has anyone had that happen? Anyone find folks who feel 1080i look better over 720p. I could understand if the source (cable box) was a better upconverter than the TV and that......... but you are taking 720p source materials and converting them two times and 1080i converting once as opposed to no 720p converstion, 1080i conversion once.

I have my own setup at home (92" FP 720p) and understand all the basics but it is just frustrating.
post #2 of 9
I have always felt setting my hd dvr and (before) upscaling dvd player looked better in 1080i than 720p to my previous 720p projectors. I just found the image looked sharper. My two 720p pjs did have great scalers though so that may be why.
post #3 of 9
Does 1080i look better on a 720p display than 720p?
-That is the question.....

(Forget 'to be or not to be')

Seriously, I don't know. I keep my outputs on 1080i and it looks like juicy HD. When I had them set to 720p for testing purposes, it looked like juicy HD.

Many will tell you that on a 50"> TV, 720p looks better because it's a progressive frame. If it does I sure can't tell the difference.
post #4 of 9
It's a moot point on most HDTVs since they generally scale the image to add atleast 5% overscan no matter what is coming in. Technically 720p should look better, but depending on the HDTV it may not.
post #5 of 9
You had an argument with your parents, that never in my live I would had. Do your parents work on Microsoft?

A argument about the difference between 720p and 1080i with my parents? Right, not even with people of my age.
post #6 of 9
1080i is only better on a 720p display when the source is 1080i/p and the deinterlacer/scaler in the TV is better than the one in the player or cable box.
post #7 of 9
Quote:
Originally Posted by paku View Post

1080i is only better on a 720p display when the source is 1080i/p and the deinterlacer/scaler in the TV is better than the one in the player or cable box.

Due to the vast number of possibilities, the only way to know for sure to try all options and see what looks the best.
post #8 of 9
1080i looks better on my 720p(768 native) LCD screen. No doubt about it. I always attributed it to the fact that since many 720p screens are native 768 so 720p signals must be upconverted to 768 while 1080i needs to be downconverted to 768. I guess it's better to downconvert than to have to upconvert.
post #9 of 9
I definitely buy into the possibility that given a specific set of circumstances that a 1080i signal could look better than a similar 720p one on a 720p TV. There are a lot of variables so like Ken H stated the only way to tell for sure is by experimentation.
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