Confusion about 1080p LCD HDTV's....

[Footloose301]

Originally Posted by AV_Integrated

You have several pieces of misinformation here that I feel is important to correct...


This is generally true with true 'televisions', but obviously, there are a ton of computer monitors out there which are 1920x1080 or higher resolution and are readily available in sizes well under 30". Resolution creating clarity is a function of viewing distance AND screen size. It is 100% incorrect to ever make a claim that it is screen size alone. If I'm a foot from a 20" display then 1920x1080 is definitely going to deliver more detail than 1280x720 - as will most other average people.


This is not true as I know of a couple of projectors at least (Optoma?) which support 1080p input resolution, but they are only 720p projectors. Just because I may be able to understand French does not mean that I can also speak it.


Except of course, 1080p can be sent over VGA, Component, and DVI.


Actually, HDMI resolution settings are determined by the device sending signaling to the source which let it know which HDMI resolutions are fully supported. A 1080p TV could support resolutions exceding 1080p if the processing was designed to do so. Or, the display may only support 720p or 1080i resolutions - which was a huge headache for many displays just a year or so ago.


Yes they do, and more experienced people do as well.


Not really. One field (not frame) of a 1080i signal is the odd or even lines of resolution from a 1920x1080 frame. There are 60 unique fields per second and every other field comprises the odd or even lines of a frame. Since it is truly a 1920x1080 frame that is trying to be achieved it is critical to have very good processing which treats every moment as a 1080p goal, not 1920x540.


Many displays simply treat 1080i like 1920x540 and discard a lot of important information and don't properly evaluate the frames to produce smooth video. 1080i is far more difficult than 1080p to deal with.


Actually it depends on the source content as to which looks better, but with movies which are shot at 24fps, to convert to 1080i/60 the full resolution of 1920x1080 is included across the interlaced frames and a device which properly deinterlace can produce 100% of the full resolution of 1080p when fed a 1080i source created from 24fps film stock.

This is why the 'benefit' of 1080p is often considered to be a stupid point... and something I agree with.

What matters far more than 1080i/1080p, is 24hz display output, or multiples thereof, as this can remove judder from movies.

That is one heck of a b1tch slap

[AV_Integrated]

Originally Posted by Footloose301

That is one heck of a b1tch slap

I definitely don't mean it that way. It took me several years of learning and saying incorrect things, and then doing more research before I finally got things figured out. I'm sure I've still got a lot to learn, but the basics of resolution, input formats, output formats, and how it all matters and ties together... That is something I understand and it is not as easy as some people think it is.

I struggle with any source that makes claims of 1080i being the same as 540p - because it isn't. I struggle with any source that claims that 1080i or 720p is 'better' than the other - because they both have advantages at different times.

In the world of A/V, the first thing to understand is that there are just a ton of compromises that must be made all over the place, and video resolutions and refresh rates are no different... most of all, it's okay.

[gvortex7]

Originally Posted by DrinkMore

Are you all including Monitors in this? Dell's 2407 supports 1080p native.

No, I clearly said LCD tv. I know there are a ton of monitors out there with that resolution.

[U4K61]

Originally Posted by Black Gobbo

On another forum, someone told me that LCD's only display in 720p / 1080i and if a LCD HDTV says 1080p on it, it merely accepts the 1080p signal and downgrades it to 1080i..since LCD according to them cannot display native 1080p....If this is true, what sort of HDTV can display a native 1080p signal? Most stores around me sell primarily 1080p LCD's...am I misinformed or what is going on here?

Originally Posted by gand41f

You're quite misinformed my friend. LCDs by design can only display progressively so if it says 1080p, it's 1080p. (Most of those that are labeled 720p are actually 768p, i.e., 1366x768, but that's another story.)

If you feed it 1080i, it is actually converting it to 1080p since that's the only way it can display it. How good of a job it does in this process (called deinterlacing or inverse telecine depending on the source material) varies greatly between different brands so you need to be careful there if you plan to watch a lot of 1080i material (e.g., most cables or broadcast TVs).

enjoy
gandalf

Originally Posted by Whytewash

A 32' screen for your computer?!?! That is STRONG! haha

That is how I have it setup in the bedroom. TV/Computer, works great.

What you see from a set depends on how far back you sit from it. It's a screen size/resoution/distance thing.

If Blu-ray is the source, send it as 1080p via HDMI so it maps 1:1 for each pixel to a 1080p TV and you get the best image. There will be the extra work of going from 1080p -> 1080i -> 1080p. Life is best at ppp. Some older 1080p sets may handshake only with 1080i/720p. If the set can deinterlace 1080i correctly, it will be exacly the same as on a set that had gotten a 1080p signal. If 1080i does not look the same, then the set is not deinterlaing correctly.

720p is best used for 720p sets the do not handshake with 1080p and can not deinterlace correctly. It has it's place with fast motion 60fps sports material that originates from a video camera. It's a poor choice, however, for 24fps film if you have a 1080p set. Once it's down converted 720p, spatial resolution is lost over a 1080p/i signal, even when it is scaled back up to 1080p to fill the screen by the set.

Back to 1080/p

[JohnnyBluRay]

Great info. I am going to buy my dad a new tv. Going LCD and large size, 4o inch and up. Looking for a set with great contrast ratio and 1080p (doesnt have to) Want to take my dad to the stores to look at sets. He likes Sears, so do they have a good selection? I kow Sears will lower prices against online shops or ads from other stores. Any model # i should be aware of? Im l ookin at $2000 range to play in. Thanks for any info.