TMer25... a question

[SintonFan]

What are the resolutions of 1080(i or p) and 720 respectively? I'm curious because of what my projector says it is currently playing at and what it was rated as.:nerd:

[TMer25]

Well 1080i and 1080p are the same number of pixels (2,073,600), it's just in 1080i, the picture is scanned as two seperate passes. Which on fast moving things such as sports, you can get some motion artifacts. 1080p is all the lines scanned at once. But the only place you can get 1080p from right now is HD-DVD, Blu Ray and some 360 and PS3 games, as no one broadcasts in 1080p.

720p is the resolution Disney(ESPN and ABC) and Fox chose for their HD resolution. A little less detail than 1080i or p, but better for sports.

Most projectors are now fixed pixel so they just scan whatever they get to their native resolution. So if you have a DLP that is 720p, it scans everything to that. So you can feed it a 1080i signal but it then converts it to 720p.

What kind of projector is it?

[SintonFan]

Originally posted by TMer25
Well 1080i and 1080p are the same number of pixels (2,073,600), it's just in 1080i, the picture is scanned as two seperate passes. Which on fast moving things such as sports, you can get some motion artifacts. 1080p is all the lines scanned at once. But the only place you can get 1080p from right now is HD-DVD, Blu Ray and some 360 and PS3 games, as no one broadcasts in 1080p.

720p is the resolution Disney(ESPN and ABC) and Fox chose for their HD resolution. A little less detail than 1080i or p, but better for sports.

Most projectors are now fixed pixel so they just scan whatever they get to their native resolution. So if you have a DLP that is 720p, it scans everything to that. So you can feed it a 1080i signal but it then converts it to 720p.

What kind of projector is it?
.
It's a Dell 2400MP
It's supposed to be rated at 576p but when I check the output from the menu it list the resolution at 1920x1080 on wide screen. I thought was 1080?
That is what was listed on Discovery HD's Planet Earth when I played that program a few weeks back. The picture was way too sharp to be 576p imho.
Since the maximum resolution on the projector is listed at 1920x1080, that it is truly is playing at 1080?:confused:

[TMer25]

Actually that projector is 1024x768. But this is about to get a little confusing. Since your projector is natively 4x3, it's taking anything thats widescreen and converts it to 1024x576. 1080i stuff is going to look better(such as DiscoveryHD), than 720p, due to the fact that it has a little bit more picture info than 720p.

Doesn't hurt that Planet Earth is pretty much reference quality HD video.

So to sum this up, if your watching something in 4x3, your getting 1024x768 as your resolution. Watching something in 16x9, your getting 1024x576. 1080i will probably look better on that projector than 720p will just due to it having more picture info. It's a little easier to scale down than it is to scale up.

Who are you getting your HD feed from? Cable or satellite?

[SintonFan]

Time Warner is my currect cable provider. I have their HD dvr(which is quirky... to be kind lol).
The question I ask is why would my output be listed as 1920x1080 if the native resolution is 1024x768?
Also, I've compared a friend's Vizio 1080 50" LCD TV on the same Time Warner channels(we have the same TW package and HD dvr) and this projector actually looks superior to his(much to his consternation) in definition and color? I would think the opposite would be true?

[TMer25]

Yeah quirky is one way to describe their DVR. If you have the HD8000 you should swap it out for an HD 8300 as it has much better quality on the video outputs.

The 1920x1080 is just what the signal it's receiving is not what it's outputting. No matter what it says it's outputting 1024x576 on HD material.

As far as the Vizio goes, their service menu settings are horrible and the scalers in those are pretty bad as well. You can get a good picture out of them, just requires alot of calibrating in the service menu. Plus their LCD panels push green more than other manufacturers.

[SintonFan]

Originally posted by TMer25
Yeah quirky is one way to describe their DVR. If you have the HD8000 you should swap it out for an HD 8300 as it has much better quality on the video outputs.

The 1920x1080 is just what the signal it's receiving is not what it's outputting. No matter what it says it's outputting 1024x576 on HD material.

As far as the Vizio goes, their service menu settings are horrible and the scalers in those are pretty bad as well. You can get a good picture out of them, just requires alot of calibrating in the service menu. Plus their LCD panels push green more than other manufacturers.
.
Cool. Thanks for the tip on the dvr. I'm not sure what I have but it's very buggy and I am starting to miss even the horrendous Dish DVRs. lol
Can this projector go higher than 576? The owners guide list this and I quote "auto synchronization to UXGA (1600 x 1200)"(I guess that relates to the 4:3). What exactly does this mean?
It sure does look like the picture is much better than 576?:)

[TMer25]

UXGA would is a 4x3 mode for business presentations at 1600x1200. Can only get it from a computer VGA output.

[SintonFan]

Thanks for your time and expertise.:) :clap:

[TMer25]

No problem, glad I can help.