1080i vs 1080p...Why so much difference??

[J_WILL_GV]

Ok, so here is my beef, I have a PS3 and a native 108i sanyo LCD ( about 3 years old ). I notice quite often that when I go to a home electronics store and see the blu-rays playing on 1080p LCD's, the PQ is mind blowing...like better than reality..crisp, clear...I mean just astounding. Than we have my own LCD, while the PQ is def above DVD qualtiy, and very crisp, bright and clear...I am in no way confused at whether I am watching a movie or looking out a window at real life. I have the proper full HDMI 24k chords by sony made for the PS3...is there that much of a difference between 1080i and 1080p? Or is it just my tv

Thanks,
Josh

[XundeadhunterX]

yes there is a difference; the difference between 1080i and 1080p is really only noticeable on tvs 36'< still can be noticeable on smaller LCD TVs. now the terms on what they do i know but cant explain

[liquidice]

In 1080i each frame of video is sent or displayed in alternative fields. The fields in 1080i are composed of 540 rows of pixels or lines of pixels running from the top to the bottom of the screen, with the odd fields displayed first and the even fields displayed second. Together, both fields create a full frame, made up of all 1,080 pixel rows or lines, every 30th of a second.

In 1080p, each frame of video is sent or displayed progressively. This means that both the odd and even fields (all 1,080 pixel rows or pixel lines) that make up the full frame are displayed together. This results in a smoother looking image, with less motion artifacts and jagged edges.

[Blown 4.3]

the stuff in the stores looks different than at home. even if its the EXACT same model.

[Sonny]

I don't even need to mention 1080i or 1080p. LCD's have come along way in 3 years.

[JasonR]

You are seeing motion interpolation technology on these sets.

Some like it and some hate it.

[Beta Man]

Originally Posted by Sonny

I don't even need to mention 1080i or 1080p. LCD's have come along way in 3 years.

Very true!

Originally Posted by JasonR

You are seeing motion interpolation technology on these sets.

Some like it and some hate it.

Yes... I for one hate it.... not everything should look like a cartoon.... also, they calibrate their sets to try to give them a fake "3D" Appearance..... which I also can't stand.

Originally Posted by XundeadhunterX

yes there is a difference; the difference between 1080i and 1080p is really only noticeable on tvs 36'<

Not true.... partially or otherwise....

[dadkins]

On something like a news cast of the anchor sitting at a desk(very little movement) 1080 is 1080.

When things start moving, that is where you will start seeing blur and picture degradadtion.
As explained above 1080i is half drawn, then second half drawn, every-other line.
1080p is drawn in one pass.

[Anthony P]

plus there is no such thing as a 1080i LCD. You most likely have a 720p set that accepts a 1080i input. That means that the 1080i video is then downscaled and interlaced to make a 720p pic and that destroys a lot of the PQ and so it should not be as good as a 1080p set.

[kndy]

Well...it's best not to think of just 1080p, there are always considerations of picture quality of the device, how far you are sitting, your eye sight, etc.



http://www.soundandvisionmag.com/hit...esolution.html

http://www.avsforum.com/avs-vb/showthread.php?t=768167

http://www.avsforum.com/avs-vb/showthread.php?t=768167

http://blog.hometheatermag.com/geoff...061080iv1080p/

http://hometheatermag.com/hookmeup/0506halfrez/

[Rob J in WNY]

It might be a bit handy to mention that in most big box stores, the "shared" HD signal is passed along to each TV via component, so in many cases, the signal is going to be 1080i at best (or 720p).

Standalone display systems, often seen on the end caps of isles, if connected via HDMI, can offer a true 1080p picture.

[blurayisking]

Hello ANTHONY P:

Older Sony LCD's were 1080i, before 1080P took hold. My daughter has a 40 inch Sony LCD, that is about 2 ~ 3 years old that is definitely 1080i.

[crackinhedz]

Originally Posted by blurayisking

Hello ANTHONY P:

Older Sony LCD's were 1080i, before 1080P took hold. My daughter has a 40 inch Sony LCD, that is about 2 ~ 3 years old that is definitely 1080i.

there is no such thing as a native 1080i LCD. Sure it may accept a 1080i signal, but will scale to its native [progressive] resolution. ie. 720p,1080p etc



http://www.cnet.com/hdtv-resolution/

² All fixed-pixel displays are natively progressive-scan, meaning that even if the source is interlaced, they'll convert it to progressive-scan for display. That's why, for example, you'll hear about a "1080p LCD" but never a "1080i LCD."

http://hometheater.about.com

Since LCD televisions have a finite number of pixels (referred to as a fixed-pixel display), signal inputs that have higher resolutions must be scaled to fit the pixel field count of the particular LCD display.

...Also, since LCD Television only display progressively scanned images, 1080i source signals are always either deinterlaced to 1080p or scaled down to 768p, 720p, or 480p depending on the native pixel resolution of the specific LCD television.

CRT's on the other hand, can be 1080i native.

[Dr.blu-ray]

Originally Posted by JasonR

You are seeing motion interpolation technology on these sets.

Some like it and some hate it.

is there anyways to turn this option on?

[Anthony P]

Older Sony LCD's were 1080i, before 1080P took hold. My daughter has a 40 inch Sony LCD, that is about 2 ~ 3 years old that is definitely 1080i.

so what is the model number?

[J_WILL_GV]

Thanks so much, I really appreciate all these really great replies. This helps out so much, especially the post mentioning "motion interpolation technology". That definitely must be whats was distinguishing most LCD's from mine. I finally understand what was making the picture look so unnaturally realistic.

[Trogdor2010]

The difference between 1080i and 1080p is that 1080i has half the information of a 1080p signal, as is interlaced is to progressive, an interlaced signal scans half of the horizontal pixels (1080i actually has 1920*540 pixels), since the pixels are small enough, the pixels are apart by one pixel, you will not notice this in a true 1080p display, unless you sit very close to the screen. What you should worry about is the deinterlacing of the display itself, an interlaced signal requires the processing of the TV, as well as it's source (most blu ray players should do fine with this), a progressive signal requires the processing of only the player (unless if there is a problem with the TV using the signal, which is the fault of the decoder). I recall, most blu ray players do when it sends a 1080p60Hz signal, most blu rays are encoded in 1080p24Hz, then sends in a 1080i60Hz, then the player deinterlaces the signal to 1080p60Hz, the reason they did this was that the HDCP encryption (the reason you can't send a 1080p signal from a blu ray via Component) was too high. The only way to get a true 1080p image from a blu ray source is if your TV can accept a 1080p24Hz signal, unless if you own one of those players (Please tell me what are the players) that actually doesn't turn the source to an interlaced format and sends the 1080p24Hz to 1080p60Hz simply using 2:3 pulldown.

To put it simply if your TV has better deinterlacing than your player, go with 1080i, if your player has better deinterlacing than your TV, go with a 1080p signal, or if your TV has 1080p24Hz support, use it, unless if your tv uses 2:3 pulldown on the 1080p24Hz and you are bothered by the judder. My TV is a DLP which processes images in 120Hz, so it does 5:5 pulldown, but keep in mind some 120Hz displays do not use 5:5 pulldown, and instead for the 1080p24Hz use 2:3 pulldown, then 2:2 pulldown for the 120Hz signal.

[bhampton]

My reply was going to be similar to Anthony's.

A "1080i" set is a 720p fixed panel that has to convert 1080i to 720p and that conversion can be messy. I never knew why they try to convince people these 720p sets are 1080i native.... that was just a scam of sorts.

-Brian

[Alan A]

Originally Posted by J_WILL_GV

Ok, so here is my beef, I have a PS3 and a native 108i sanyo LCD ( about 3 years old ). I notice quite often that when I go to a home electronics store and see the blu-rays playing on 1080p LCD's, the PQ is mind blowing...like better than reality..crisp, clear...I mean just astounding. Than we have my own LCD, while the PQ is def above DVD qualtiy, and very crisp, bright and clear...I am in no way confused at whether I am watching a movie or looking out a window at real life. I have the proper full HDMI 24k chords by sony made for the PS3...is there that much of a difference between 1080i and 1080p? Or is it just my tv

Thanks,
Josh

I don't want to burst your bubble but there is no such thing as a 1080i LCD
you have a 720P LCD that accepts a 1080i signal then down-converts it to 720P the resolution of your set is 1366x768 I bet while true 1080p is 1920x1080 so the 1080P set look so much better because they are almost twice the resolution, upgrade asap you won't regret it.

[bhampton]

Also,...

Keep in mind that the sets in a place like Best Buy are not calibrated to produce the best Picture Quality... They are usually in "torch mode" and setup to produce maximum brightness and saturation in an attempt to get the sets sold.

You can run your own display like that of course but it will last half as long as if it's setup to standards.

-Brian