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1080i de-interlacing question... (OT but need help)

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Old 06-03-2008, 11:23 AM   #1
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Default 1080i de-interlacing question... (OT but need help)

I've asked this question in the Flat Panel section, but am not really getting any answers. I'm hoping someone here can help me out. And I don't think there's any possible way an argument can ensue. (Who am I kidding?? I'll wait for the first person who says 1080p is better than 1080i. )

I'm waiting for the delivery of my new Panny 85U plasma. We've got AT&T U-verse, and it's set to display in 1080i. In Cnet's review of the 85U plasma line from Panasonic, they stated that it will deinterlace 1080i video perfectly, but that 1080i film did not.

I know this may seem like a really basic question, but TV is video right?? Since I'll watch BD's in 1080p with the new set, I know that's not an issue, and games in 720/1080p. DVD's will be upscaled to 1080p by the PS3, so when on earth would I come across a 1080i film signal??
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Old 06-03-2008, 11:27 AM   #2
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Originally Posted by awol View Post
I've asked this question in the Flat Panel section, but am not really getting any answers. I'm hoping someone here can help me out. And I don't think there's any possible way an argument can ensue. (Who am I kidding?? I'll wait for the first person who says 1080p is better than 1080i. )

I'm waiting for the delivery of my new Panny 85U plasma. We've got AT&T U-verse, and it's set to display in 1080i. In Cnet's review of the 85U plasma line from Panasonic, they stated that it will deinterlace 1080i video perfectly, but that 1080i film did not.

I know this may seem like a really basic question, but TV is video right?? Since I'll watch BD's in 1080p with the new set, I know that's not an issue, and games in 720/1080p. DVD's will be upscaled to 1080p by the PS3, so when on earth would I come across a 1080i film signal??
#1. Can you link the CNET review?

#2. "TV" is shot with Video Cameras operating from 30 frames per second to 60 frames per second

#3. Movies are usually shot with 35mm film at 24 FPS. So it could be failing the 3:2 pulldown cadence test.

Need the review to see what they are comparing and said.
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Old 06-03-2008, 11:36 AM   #3
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Here's the review itself.

http://reviews.cnet.com/flat-panel-t...1.html?tag=tpr

I was thinking that TV broadcasts were video (not film), but I couldn't for the life of me think of a 1080i film source. I didn't see anything in there about it failing the 3:2 pull down, but it does not have the 24p 48/72Hz settings of the higher models. I honestly felt that if I hadn't noticed judder by now, I likely wouldn't!

Thanks for you help Lee!
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Old 06-03-2008, 11:49 AM   #4
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Originally Posted by awol View Post
Here's the review itself.

http://reviews.cnet.com/flat-panel-t...1.html?tag=tpr

I was thinking that TV broadcasts were video (not film), but I couldn't for the life of me think of a 1080i film source. I didn't see anything in there about it failing the 3:2 pull down, but it does not have the 24p 48/72Hz settings of the higher models. I honestly felt that if I hadn't noticed judder by now, I likely wouldn't!

Thanks for you help Lee!
I posted an answer in the flat panel section first, but will post it here also. HD-DVD players in the A1, A2, and A3 model numbers are 1080i only. They cannot output 1080p. So if you would use one of those, you would get a 1080i film source. That's all I can think of.
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Old 06-03-2008, 12:06 PM   #5
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Originally Posted by mobiushky View Post
I posted an answer in the flat panel section first, but will post it here also. HD-DVD players in the A1, A2, and A3 model numbers are 1080i only. They cannot output 1080p. So if you would use one of those, you would get a 1080i film source. That's all I can think of.
Thanks for posting both places! I appreciate it. I hadn't thought of the HD-DVD players at 1080i, but since I don't own one, it wouldn't apply. So since I'm using a PS3 and eventually a BD standalone (both of which would output 1080p), it sounds like I won't to worry about the 1080i film de-interlacing.

Ugh. Can you imagine all this junk just to determine which AVR I should get??? The new Sony (not released yet) does upscale to 1080p, but the new Onkyo 606 only scales to 1080i. No biggie since the Wii is only 480p video to begin with. And since the TV does deinterlace 1080i video properly, no worries there. I just couldn't think of any sources of 1080i film.
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Old 06-03-2008, 04:09 PM   #6
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Quote:
Originally Posted by awol View Post
I've asked this question in the Flat Panel section, but am not really getting any answers. I'm hoping someone here can help me out. And I don't think there's any possible way an argument can ensue. (Who am I kidding?? I'll wait for the first person who says 1080p is better than 1080i. )

I'm waiting for the delivery of my new Panny 85U plasma. We've got AT&T U-verse, and it's set to display in 1080i. In Cnet's review of the 85U plasma line from Panasonic, they stated that it will deinterlace 1080i video perfectly, but that 1080i film did not.

I know this may seem like a really basic question, but TV is video right?? Since I'll watch BD's in 1080p with the new set, I know that's not an issue, and games in 720/1080p. DVD's will be upscaled to 1080p by the PS3, so when on earth would I come across a 1080i film signal??
It may be referring to 1080p HD movie discs being sent as 1080i, or it might be referring to films being transmitted in HD on OTA/Cable/satellite, which will be 1080i.
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Old 06-03-2008, 04:12 PM   #7
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you'll be fine.

I'm sure my old LG fails everyone of these fancy AV yuppie tests, and everything looks great.

Enjoy the Panny.
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Old 06-03-2008, 04:22 PM   #8
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AWOL:

Is this the paragraph you are concerned with?

Quote:
Video processing: As we'd expect from a 1080p plasma, the TH-46PZ85U successfully resolved every detail of 1080i and 1080p sources according to test patterns, and while it didn't correctly de-interlace 1080i film-based sources, we don't consider that a deal-breaker. As usual, it was nearly impossible to appreciate any difference in detail between the 1080p Panasonic and the 720p Pioneer--both looked equally sharp with 1080 resolution sources.
I would think that the Noise Reduction issue would have been more of a concern than just a simple sentence that really doesn't go into exactly what they mean.

BTW - there are 1080i BD's - some of the concert titles use this output due to the issue of being filmed with HD-CAM's. No films at 1080i though.
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Old 06-03-2008, 04:34 PM   #9
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Yup. That's the one that made me go, "Huh?" I've seen the set on several instances, and quite honestly, I couldn't see anything I would describe as Noise. We also will be sitting about 8 or 9 feet away from the set. And to put it in perspective, I'm currently watching a HD CRT RPTV with a really bad convergence board. White is now very obviously made up of Red Green and Blue if you know what I mean.

I'm thinking (and hoping) that regardless of the purported noise issue, this has GOT to be better than what I've got now. Again, even with the "not deinterlacing" properly issue, I'm not sure I would even be able to tell. I like to think that I would, but really, probably not.



Quote:
Originally Posted by Lee Stewart View Post
AWOL:

Is this the paragraph you are concerned with?



I would think that the Noise Reduction issue would have been more of a concern than just a simple sentence that really doesn't go into exactly what they mean.

BTW - there are 1080i BD's - some of the concert titles use this output due to the issue of being filmed with HD-CAM's. No films at 1080i though.
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Old 06-03-2008, 04:56 PM   #10
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Originally Posted by awol View Post
Yup. That's the one that made me go, "Huh?" I've seen the set on several instances, and quite honestly, I couldn't see anything I would describe as Noise. We also will be sitting about 8 or 9 feet away from the set. And to put it in perspective, I'm currently watching a HD CRT RPTV with a really bad convergence board. White is now very obviously made up of Red Green and Blue if you know what I mean.

I'm thinking (and hoping) that regardless of the purported noise issue, this has GOT to be better than what I've got now. Again, even with the "not deinterlacing" properly issue, I'm not sure I would even be able to tell. I like to think that I would, but really, probably not.
Had 1 CRT based RPTV (50") and 2 FPTV's CRT based (100" and 144")

I know EXACTLY what you are saying.

The dreaded Convergence Drift!

PS: watch many test patterns do you?
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Old 06-03-2008, 07:34 PM   #11
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you'll be fine.

I'm sure my old LG fails everyone of these fancy AV yuppie tests, and everything looks great.

Enjoy the Panny.
Sacrilege!

You realize that a display that does not properly de-interlace 1080i is only showing 540p? Even if it looks great, it's not the Holy Grail of BD, 1080p.

So that's OK, you're saying?
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Old 06-03-2008, 07:45 PM   #12
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Sacrilege!

You realize that a display that does not properly de-interlace 1080i is only showing 540p? Even if it looks great, it's not the Holy Grail of BD, 1080p.

So that's OK, you're saying?
I've never done any deinterlacing tests.

It did well with DVE, I kinda fumbled through it, not sure if there was a deinterlacing test.

Looks better than my buddies 1080p Samsung HDTV, so it must be doing something right.
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Old 06-03-2008, 08:16 PM   #13
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Originally Posted by Lee Stewart View Post
BTW - there are 1080i BD's - some of the concert titles use this output due to the issue of being filmed with HD-CAM's. No films at 1080i though.
I believe I've heard reports of Short Circuit being 1080i. And was Terminator 3 incorrectly encoded at 1080i initially on BD?
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Old 06-03-2008, 08:32 PM   #14
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Sacrilege!

You realize that a display that does not properly de-interlace 1080i is only showing 540p? Even if it looks great, it's not the Holy Grail of BD, 1080p.

So that's OK, you're saying?
What What What????????

How can 1080i not deinterlaced properly possibly become 540p??
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Old 06-03-2008, 10:00 PM   #15
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What What What????????

How can 1080i not deinterlaced properly possibly become 540p??
That's what they do.

They throw away 540 of the real lines and either double or interpolate the remaining 540 lines up to 1080. Hence 540p. You only see half the real resolution of the image.
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