Question about 1080i v 1080p

[emperoredals11]

I found this article, and was wondering how truthful it is.

1080iv1080p/

From the Article:

Short Version
What this all means is this:

• When it comes to movies (as in HD DVD and Blu-ray) there will be no visible difference between the 1080i signal and the 1080p signal, as long as your TV correctly de-interlaces 1080i. So even if you could input 1080p, you wouldn't see a difference (because there is none).

• There is no additional or new information in a 1080p signal from movie based content.

• The only time you would see a difference is if you have native 1080p/60 content, which at this point would only come from a PC and maybe the PS3. 1080p/60 does have more information than 1080i/30, but unless you're a gamer you will probably never see native 1080p/60 content. It is incredibly unlikely that they will ever broadcast 1080p (too much bandwidth) or that 1080p/60 content will show up on discs (too much storage space and no one is using it to record/film).

[Sonny]

good stuff I have 2 50'' Pannys 1 720p/1080i & 1 1080p the Blu-ray's look the same but with the 65''flat boy I would like to think I see a diff of course everybody with a 1080p set is going to see a diff cause they spent that $$$$ baby, you no how it works.

[Sonny]

good stuff

[mikesoba]

I was just disputing this point with an HD DVD fan who said the 1080i cheap Toshiba player was no different than the 1080p Blu players since both would give you the same picture. It seems he's right???

[partridge]

But surely if a tv, such as mine, natively supports 720p then a 1080p set HAS to look better simply because there are more pixels available to show the image? So a 1080p movie is scaled down to some extent to show on a 720p tv - even one that supports 1080i?

I saw two Toshiba HD sets recently, showing the same video source, one was 1080i the other was 1080p and in my humble opinon the 1080p looked sharper, the detail just looked that little bitter better defined, etc.

Well,that's how it looked to me and my next HD set will definitely support 1080p

[lildon24]

It not a big deal but what is really the real thing u need is if you got an 1080i with 720p native will look almost like 1080p. If you got a 1080i without 720p but 480p, it looks like craps... not even high definition, it just standard definition with many lines.

1080p is just the latest HD signal since 720p which does the same but has more pixel lines than 720p. But hey, there is an 1440p tv out there but it is way too expensive.

Smaller HDTV with 720p from 17" to 32" looks great but Bigger tv will looks best if it was 34" and up with 1080p signal.

So, you dont have to have an 1080p tv if u cant afford it, you can buy an 720p hdtv and the best size is from 26" inch and up.

[Sonny]

Originally Posted by lildon24

It not a big deal but what is really the real thing u need is if you got an 1080i with 720p native will look almost like 1080p. If you got a 1080i without 720p but 480p, it looks like craps... not even high definition, it just standard definition with many lines.

1080p is just the latest HD signal since 720p which does the same but has more pixel lines than 720p. But hey, there is an 1440p tv out there but it is way too expensive.

Smaller HDTV with 720p from 17" to 32" looks great but Bigger tv will looks best if it was 34" and up with 1080p signal.

So, you dont have to have an 1080p tv if u cant afford it, you can buy an 720p hdtv and the best size is from 26" inch and up.

Ah, Ah No

[Blu-Style]

THERE IS NO DIFFERENCE BETWEEN 1080i AND 1080p.

of course there is one...

maybe it´s only noticeable if you stand very close to your TV, but there is a difference...

[LynxFX]

as long as your TV correctly de-interlaces 1080i.

Key phrase. Not all tv's are created equal and a lot don't have good deinterlacers.

No matter what it is always best to keep the chain native. Any time there is additional processing there is the chance of artifacts or other image degradation.

But for the general public, they probably wouldn't notice. Hell most don't even notice lossless vs lossy audio. I would rather have the best they can do rather than stoop to the lowest common demoninator.

[Deciazulado]

How discernable is 1080p over 1080i

[gand41f]

Can we make a sticky out of this? "1080i and 1080p are the same for movies" is one of the most common lies told by HD DVD supporters. 1080i and 1080p are different as a transport format, because most TVs cannot deinterlace/inverse telecine 1080i correctly.

Originally Posted by LynxFX

Key phrase. Not all tv's are created equal and a lot don't have good deinterlacers.

True. According to

http://hdguru.com/?p=187

(look at "3:2 Tests" section) only 14 out of 75 sets (just 18.66%) of TVs they tested recently can put together the original frames correctly from 1080i input.

In other words, in 81.34% of the TVs they tested, there was a difference between 1080i and 1080p.

enjoy
gandalf

[mikesaywhat]

Is there a difference if you use a 720p/1080i HD DVD player for a 1080P TV vs using a 1080p player for a 720P/1080i TV? Also, what does it mean when someone says, for instance, "native 1080i"? Are they referring to teh player or the television set. Thanks in advance...

[U4K61]

Originally Posted by Deciazulado

How discernable is 1080p over 1080i

Quite a bit if your TV is an older CRT type doing interlaced video. If there is motion, the vert. resolution is cut in half to 540 becasue the two fields may not match up. If your set is 1080p and does inverse 3:2 puldown correctly, then it is likely to less of an issue. Blu's native 1080p/24 is a plus over HD-DVD because it uses 1080i de-interlaced to 1080p with added notational overhead. This works, so they say. For me, it another reason HD-DVD is the clunker of the two formats.

[U4K61]

Originally Posted by mikesaywhat

Is there a difference if you use a 720p/1080i HD DVD player for a 1080P TV vs using a 1080p player for a 720P/1080i TV? Also, what does it mean when someone says, for instance, "native 1080i"? Are they referring to teh player or the television set. Thanks in advance...

If you have a 1080p set and you send it 1080p downconverted to 720p, you just lost half the spatial resolution. 720p is ~1,000,000 pixles and 1080p ~2,000,000. Send it 1080p and you are getting the best PQ as you are mapping each pixel 1:1. If it is an older 1080p set that does not take 1080p, you will have to use 2nd best 1080i. If it does inverse 3:2 pulldown correctly, you can re-create the origional 1080p/24.

If you have a 720p set, you can send eather 1080i or 720p. Try both, but watch out for poor down-conversion to 720p. For my 32" 720p LCD, 1080i was better because the PS3 produced soft 720p images. Firmware upgrades, however, changed the equation back in favor of sending it a 720p signal.

[Aaron]

Originally Posted by Craig Ruchman

Quite a bit if your TV is an older CRT type doing interlaced video. If there is motion, the vert. resolution is cut in half to 540 becasue the two fields may not match up. If your set is 1080P and does inverse 3:2 puldown 'correctly', and that is a big if, then this is not an issue. Another plus for blu is that its video is native 1080p/24. HD-DVD uses 1080i de-interlaced to 1080p with added notational overhead. This works, so they say. For me, it another reason HD-DVD is the clunker of the two formats - go BLU!

Hehe, he was linking to similar thread.

[Semp1]

I have a Sony kdl40xbr2/3 1080p LCD I am telling you 1080p and 1080i are the exact same they use the exact amount of pixels and the difference is not recognizable if you have a 1080p display and it deinterlaces 1080i well that means the PQ will most likely be the same and possibly better than something set to 1080p, depending on whether the electornic you are using or the set deinterllaces better.

[U4K61]

Originally Posted by Semp1

I have a Sony kdl40xbr2/3 1080p LCD I am telling you 1080p and 1080i are the exact same they use the exact amount of pixels and the difference is not recognizable if you have a 1080p display and it deinterlaces 1080i well that means the PQ will most likely be the same and possibly better than something set to 1080p, depending on whether the electornic you are using or the set deinterllaces better.

Careful on 1080i vs 1080p sorced from 24fps film. Spatial resolution, yes, temperal, no. 1080i has more overhead then native 1080p/24. 1080i is 30fps @ 2 fields per frame. The 6 extra frames is wasted space. Sadly, the broadcast world is slow to get out of an analogue interlaced mind set in a progressive digital one. We would get a better PQ and have some extra bandwith left over.

At the beginning of HD, 1080i/60 was a digital signal for analogue CRT's timed to 60 cycle AC. The new system back then has become legacy next to our 1080p 120Hz progressive scan TVs.

[gand41f]

Originally Posted by Semp1

I have a Sony kdl40xbr2/3 1080p LCD I am telling you 1080p and 1080i are the exact same they use the exact amount of pixels and the difference is not recognizable if you have a 1080p display and it deinterlaces 1080i well that means the PQ will most likely be the same and possibly better than something set to 1080p, depending on whether the electornic you are using or the set deinterllaces better.

Nope, not the same for film-based content. Your LCD fails the 3:2 cadence test:

http://www.hometheatermag.com/hookmeup/1106hook/

You should be feeding 1080p for film-based content.

Looks like it can deinterlace non-film based content fine as long as you don't leave it at the factory default, though.

enjoy
gandalf

[Maxell]

1080p looks more smoother. I usually see more artifact with 1080i sources.

[becomingwater]

Originally Posted by emperoredals11

I found this article, and was wondering how truthful it is.

1080iv1080p/

From the Article:

There is a difference! If you watch a movie in 1080i, on fast pan and scan scenes there will be jumping, as in tearing in the picture, but with 1080p you will notice this is mostly missing. For the most part, he is right you wont see a difference, but you will see one on fast action scenes.

Wait until 1440i/1440p are released. Correct me if I am wrong, but I think the PS3 can have a firmware upgrade to display this resolution.