Topic: 1080i/1080p on 720p Display

[IceTea]

Hi,

I know the difference between 1080i or 1080p. What I'd like to ask is, is there any difference between the two if the native resolution of your Display is only 720p?  Another way of putting it is, do I need a 720p Display which can accept 1080p-signal or would 1080i-only do?  Even if I have a 1080p player, it would be down-scaled to 720p, right?  Please share your thoughts on this.  Thanks. 

[HouseBum]

1080i vs 1080p

So, whether you output 1080i or 1080p, it is still inherently the same information. The only difference is in whether the player interlaces it and your TV deinterlaces it, or if the player just sends out the 1080p signal directly. If the TV correctly deinterlaces 1080i, then there should be no visible difference between deinterlaced 1080i and direct 1080p (even with that extra step). There is no new information—nor is there more resolution, as some people think....

Two caveats: Other Blu-ray players can output 1080p/24. If your TV can accept 1080p/24, then it is adding the 3:2 sequence, unless it is one of the very few TVs that can change its refresh rate. Pioneer plasmas can change their refresh rate to 72 Hz, and they do a simple 3:3 pulldown (showing each film frame three times). This looks slightly less jerky.

If you're a gamer, then there is a difference, as 1080p/60 from a computer can be 60 different frames per second (instead of 24 different frames per second doubled and tripled, as with movie content). It is unlikely that native 1080p/60 content will ever be broadcast or distributed in wide numbers....

Without question, it would be better if all TVs accepted a 1080p input. (Read that again before you start sending your e-mails.) What I hope this article points out is that, if you have a 1080p TV that only accepts 1080i, you're not missing any resolution from the Blu-ray or HD DVD source. If a TV doesn't correctly deinterlace 1080i, on the other hand...

So even a TV with 1920x1080 resolution, 1080i vs 1080p will depend on how your TV deinterlaces the 1080p signal. So with a Tele with 1366x768 resolution, since the 1080 signal will be downscaled to 720 or simply put that you're not really getting 1080i or 1080p displayed at 1980x1080, 1080i vs 1080p shouldn't be a concern.

[pchin]

is there any difference between the two if the native resolution of your Display is only 720p?  Another way of putting it is, do I need a 720p Display which can accept 1080p-signal or would 1080i-only do?  Even if I have a 1080p player, it would be down-scaled to 720p, right? 

On a 720p display there's no difference so you don't have to over-burden yourself with such concern.

Here's an informative link that may answer some of your questions.
http://pinoydvd.com/board/index.php?topic=62825.0

[Tonmeister]

agree with all the replies. even i just set my dvd player to 480p even if the dvd and lcd can upscale to 1080p because i don't see any significant difference in picture quality. the only time i saw  "real" difference was when i plugged a blu-ray dvd player to my lcd and run it at 720p -- ibang klase ang linaw at detalye. setting both the blu-ray and lcd to 1080p again didn't provide any striking difference.