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1080i vs. 1080p clearly explained - finally!

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Old 10-01-2006, 03:08 PM   #76  
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The one big difference is that the BD disc is encoded in 1080p and therefore contains all the information needed to produce the image on a 1080p display. An upconverting player is taking a 480i DVD disc and "creating" data to complete the 1920x1080 image. As a result, the upconverting player is highly susceptible to all kinds of noise and artifacts. Comparing the two with a movie available in both formats confirms this.
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Old 10-01-2006, 03:24 PM   #77  
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Quote:
Originally Posted by borromini
The one big difference is that the BD disc is encoded in 1080p and therefore contains all the information needed to produce the image on a 1080p display. An upconverting player is taking a 480i DVD disc and "creating" data to complete the 1920x1080 image. As a result, the upconverting player is highly susceptible to all kinds of noise and artifacts. Comparing the two with a movie available in both formats confirms this.
I see what you mean. But then it leads to the question of what's the difference between upscaling to 1080i vs 1080p? None?
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Old 10-01-2006, 08:38 PM   #78  
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Correct.

All we are talking about here is resolution--true HD resolution (like HD DVD or Blu-Ray) and simulated HD resolution (upscaling 480i players).

There is no difference in resolution between 1080i and 1080p, it simply a difference in how the image is transmitted. This is true regardless of whether the image is true HD or simulated HD.
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Old 10-02-2006, 12:13 PM   #79  
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Quote:
Originally Posted by a_ok2me
I see what you mean. But then it leads to the question of what's the difference between upscaling to 1080i vs 1080p? None?
Assuming a good deinterlacer, 1080i30/60 should have the exact same image as 1080p30/60 when watching a 24fps movie (i.e. all of them). A movie being displayed at 1080p24 would be better than all of the resolutions above, if you have a high-end TV that is capable of taking advantage of it (currently there is only one on the market that can). The issue is that to display a 24fps movie at 60 hertz requires you to display some pictures 3 times, and other 2 times, creating a "juddering" look that can be quite obvious at the final credits of a movie. A 72 hertz screen can take 1080p24, and display each screen 3 times, avoiding the juddering issue. So in summary, there can be an issue, but chances are you don't have the hardware to make it matter.
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Old 10-02-2006, 01:34 PM   #80  
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Quote:
Originally Posted by fryet
Assuming a good deinterlacer, 1080i30/60 should have the exact same image as 1080p30/60 when watching a 24fps movie (i.e. all of them). A movie being displayed at 1080p24 would be better than all of the resolutions above, if you have a high-end TV that is capable of taking advantage of it (currently there is only one on the market that can). The issue is that to display a 24fps movie at 60 hertz requires you to display some pictures 3 times, and other 2 times, creating a "juddering" look that can be quite obvious at the final credits of a movie. A 72 hertz screen can take 1080p24, and display each screen 3 times, avoiding the juddering issue. So in summary, there can be an issue, but chances are you don't have the hardware to make it matter.
Yes, sounds like the fine print surrounds the deinterlacer, which can be hard to find a certain price points.
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Old 10-02-2006, 02:32 PM   #81  
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Quote:
Originally Posted by a_ok2me
Yes, sounds like the fine print surrounds the deinterlacer, which can be hard to find a certain price points.
Maybe I am wrong, but I think most of the sets sold today would have a good deinterlacer.
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Old 10-02-2006, 04:42 PM   #82  
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Quote:
Originally Posted by fryet
Maybe I am wrong, but I think most of the sets sold today would have a good deinterlacer.
There are many sets that have a poor deinterlacer.
See: Are You Getting All the HDTV Resolution You Expected? and referenced links in the post.
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Old 10-03-2006, 06:49 AM   #83  
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Quote:
Originally Posted by rbinck
There are many sets that have a poor deinterlacer.
See: Are You Getting All the HDTV Resolution You Expected? and referenced links in the post.
Nice link rbinck, thanks for that.

The bottom line

A number of factors determine how sharp and clear an HD display appears. Among them are bandwidth, contrast ratio, black level, and optics (in projectors). Good signal processing is very important, and, all things being equal, a display that properly deinterlaces and processes 1080i will yield a better picture than one that doesn't. Check our chart to determine if the displays you are considering pass or fail.


Make/ModelTechnologyNative ResolutionPass/Fail

Audiovox FP-3705LCD FP768p Fail

Epson LS65HD13LCD RP1080p Pass

Hitachi 60VX9153LCD RP720p Pass

JVC LT32X576LCD FP768p Pass
JVC LT-40X776LCD FP768p Pass
JVC HD526886LCOS RP720p Pass

LG DU37LZ30LCD FP768p Fail
LG DU42PX12XPlasma FP768p Fail

Mitsubishi WD-62627DLP RP1080p Fail
Mitsubishi WD-73927DLP RP1080p Fail
Mitsubishi WD-52627DLP RP1080p Fail
Mitsubishi WD-525273LCD RP720p Fail
Mitsubishi LC-3780LCD FP1080p Pass
Mitsubishi PD-4265Plasma FP768p Pass
Mitsubishi PD-5050Plasma FP768p Pass

Panasonic PJ44LCX653LCD RP720p Fail
Panasonic PJ52LCX653LCD RP720p Fail
Panasonic TH-37PX50Plasma768p Pass
Panasonic TH-50PX50Plasma768p Pass

Philips 37PF7320ALCD FP768p Fail
Philips 32PF7320LCD FP768p Fail
Philips 26PF5320LCD FP768p Pass
Philips 37PF7320LCD FP768p Fail
Philips 427230APlasma768p Fail
Philips 429630APlasma768p Fail
Philips 50PF9630APlasma FP768p Fail

Pioneer Pro 930Plasma FP768p Pass

RCA HD50LPW164DLP RP720p Fail
RCA HD50LPW175DLP RP720p Fail

Samsung HL-R5668DLP RP1080p Pass
Samsung HL-R5067DLP RP720p Fail
Samsung HL-R5667DLP RP720p Fail
Samsung HL-R6167DLP RP720p Fail
Samsung HL-R4667DLP RP720p Fail
Samsung LNR408DLCD FP768P Pass
Samsung LNR268WLCD FP768p Pass
Samsung HPR-5052Plasma FP768p Pass
Samsung HPR-4252Plasma FP768p Pass

Sharp LC-45GD5ULCD FP1080p Fail
Sharp LC-32GB5ULCD FP768p Fail
Sharp LC-32D5ULCD FP768p Fail

Sony KDF-55A20LCD RP768p Fail
Sony KDSR60XBR1LCOS RP1080p Pass
Sony KDSR50XBR1LCOS RP1080p Pass
Sony KDFE-42A103LCD RP720p Pass
Sony KDFE-50A103LCD RP720p Pass
Sony KLVS32A10LCD FP768p Fail
Sony KLV32XBR1LCD FP768p Pass
Sony KDL26XBR1LCD FP768p Pass

Toshiba 46HM95DLP RP720p Pass
Toshiba 52HM95DLP RP720p Pass
Toshiba 37HL95LCD FP768p Pass

Westinghouse LVM-37W1LCD FP1080p Pass

Yamaha DPX-1300DLP FP720p Pass

Total Sets: 54
Passed: 28
Fail: 26
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Old 10-03-2006, 07:29 AM   #84  
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Quote:
Originally Posted by Nevada_MO_Guy
Nice link rbinck, thanks for that. ...Total Sets: 54
Passed: 28 Fail: 26
Not to detract from Rbincks and others' detailed,timely,necessary repeated reminder about poor deinterlacing in many "top-of -the-line" models - Sharp 45" 1080p LCDs in particular - the link for the article (not Ribinck's blog) and list you pasted here today (without link or else required © attribution {Copyright © Primedia Magazines, Inc. All rights reserved.}) was already posted in this thread 2 weeks ago (#57) - and again a few days later in #63 -

Last edited by maicaw; 10-03-2006 at 07:57 AM..
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Old 10-03-2006, 12:16 PM   #85  
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Quote:
Originally Posted by maicaw
list you pasted here today (without link or else required © attribution {Copyright © Primedia Magazines, Inc. All rights reserved.}) [/U] was already posted in this thread 2 weeks ago (#57) - and again a few days later in #63 -
I don't get what your saying?

The link for the website was included as a hyperlink in the first link as ": Are You Getting All the HDTV Resolution You Expected?" I just copied the list of the tv's.

First time I've seen it, I'm sure #57 and #63 where nice posts.

As for any copyright confusion, the "fair use doctrine" should easily cover the use of any material in the forum for use in discussion and debate.

Last edited by Nevada_MO_Guy; 10-03-2006 at 12:18 PM..
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Old 10-04-2006, 09:48 AM   #86  
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Yes, this link was very useful and well written.

I believe most displays that get to market are generally fit for the purpose (obviously some are better than others in features, quality/reliability, etc). My gripe is with the setup - I know several people who have bought HD sets but are happily watching them with incorrect picture or STB settings - you might say that HD is wasted on them; and they don't know what they are missing!
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Old 10-05-2006, 05:51 PM   #87  
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Interesting that the same company with simlar sets isn't running a standardized deinterlaser. You'd think they'd use the same guts to the extent possible just to save money.
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Old 10-12-2006, 09:47 AM   #88  
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I know you have been thanked already for the great article link, but just thought I would put in my opinion!!!

THANKS!
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Old 02-19-2008, 11:28 PM   #89  
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great post..
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Old 08-27-2008, 07:55 AM   #90  
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great post!
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