Plasma TVs
#1
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Plasma TVs
I've been seeing 42 inch plasma TVs for about $700 (name brands like Panasonic and Sony) but the down side is they are either 720p or 1080i..
Now my question is:
Is 1080p really that necessary?
Now my question is:
Is 1080p really that necessary?
#3
Big White Chocolate
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It depends on viewing distance.
http://www.carltonbale.com/2006/11/1080p-does-matter/
Also:
But you should also take your own impressions into account. The viewing distance chart is an average. Some people can experience the screen-door effect (when you can start making out the lines in between the individual pixels -- stand really close to a display to see what I mean) at further distances.
http://www.carltonbale.com/2006/11/1080p-does-matter/
Also:
The Imaging Science Foundation (ISF) states the the most important aspects of picture quality are (in order): 1) contrast ratio, 2) color saturation, 3) color accuracy, 4) resolution.
Last edited by NetEditor; 11-06-2007 at 08:39 PM.
#6
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Originally Posted by 2001AudiS4
You maybe saw a panasonic plasma but not a sony plasma.
#7
Suzuka Master
Originally Posted by Corrosion
You're right, the Sony Bravia one was $700, 32 inches and that actually was 1080p.
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#8
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This is what I'm talking about:
Sony KDL-32VL130 Bravia 32" LCD HDTV, HDMI input, 1080p, 16:9, NTSC & digital ATSC HDTV tuner, remote
$695
PANASONIC TH-42PX6U 42" Diagonal Plasma HDTV Monitor, 1024x768 resolution 16:9, HDTV ready, 10,000:1 contrast ratio
$895
Sony KDL-32VL130 Bravia 32" LCD HDTV, HDMI input, 1080p, 16:9, NTSC & digital ATSC HDTV tuner, remote
$695
PANASONIC TH-42PX6U 42" Diagonal Plasma HDTV Monitor, 1024x768 resolution 16:9, HDTV ready, 10,000:1 contrast ratio
$895
#9
Moderator Alumnus
Originally Posted by Corrosion
This is what I'm talking about:
Sony KDL-32VL130 Bravia 32" LCD HDTV, HDMI input, 1080p, 16:9, NTSC & digital ATSC HDTV tuner, remote
$695
PANASONIC TH-42PX6U 42" Diagonal Plasma HDTV Monitor, 1024x768 resolution 16:9, HDTV ready, 10,000:1 contrast ratio
$895
Sony KDL-32VL130 Bravia 32" LCD HDTV, HDMI input, 1080p, 16:9, NTSC & digital ATSC HDTV tuner, remote
$695
PANASONIC TH-42PX6U 42" Diagonal Plasma HDTV Monitor, 1024x768 resolution 16:9, HDTV ready, 10,000:1 contrast ratio
$895
The Panasonic isn't even a 720p TV. 720p = 1280x720 in resolution. So it's 256 lines short horizontally; 20% less than what's required to display a 720p signal.
I wouldn't use resolution alone to determine if you want to buy it... black levels, sub contrast (shadow detail), color, video noise. If you have a 1080p display with horrible contrast and bad blacks (most LCD tvs) you'd be better off with the sub 720p Plasma with good contrast and better blacks.
edited
#10
Moderator Alumnus
Originally Posted by NetEditor
chart
I find the chart and conversations about 720p vs 1080p really only exists for those with 720p sets that need to convince them selfs that their resolution is adequate. That's about the only purpose it holds. Price differences between 1080p and 720p for new sets keeps closing. And less and less 720p sets are being made.
Reality is most people watch their sets within 10-15 feet of it. Most people purchasing HDTVs are buying 40" or larger. Most people will be able to see the 2x quality difference 1080p offers over 720p. 720p will be distant memory in 5-10 years. 1080p is what all sets will be in the near future... then what will the people say "bring back 720p! I don't need 1080p"... won't happen.
While I can't argue watching a 40" screen at 15' odds are you won't be able to see the difference between 720p and 1080p. The majority of people aren't doing that... 15' is actually pretty far. I set about 9-10' from my 65".
#11
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Originally Posted by SiGGy
I wouldn't hold that chart up to be worth much. I can tell it wasn't created using a real-world scientific study. There's too many variables... At what vision level did they use to make that chart 20:20? Using near sited or far sighted people? I can tell you looking at it that it's BS. Plain and simple it's made for FUD.
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#13
Moderator Alumnus
Originally Posted by NetEditor
![Why Me](https://acurazine.com/forums/images/smilies/whyme.gif)
? Perhaps if the data actually came from a scientific study it would have some credibility and could be used.
But ya, I suppose a chart is useful for anyone that's on the fence about it. Just be nice to have one made from a study not made up numbers.
#14
Someone stole "My Garage"
FWIW, I have a 42" Panasonic TH-42PX75U (it's 768p actually / 1080i), and it's definitely got a superb picture from my viewing distance of 8'. I have 20/15 vision (yes, better than 20/20 thanks to laser eye surgery!), and can't notice any screen-door effect or pixelation, etc from that distance.
#15
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Originally Posted by SiGGy
I was pointing how worthless it is... if the data can't be used why even look at it
? Perhaps if the data actually came from a scientific study it would have some credibility and could be used.
But ya, I suppose a chart is useful for anyone that's on the fence about it. Just be nice to have one made from a study not made up numbers.
? Perhaps if the data actually came from a scientific study it would have some credibility and could be used.
But ya, I suppose a chart is useful for anyone that's on the fence about it. Just be nice to have one made from a study not made up numbers.
Based on the resolving ability of the human eye (with 20/20 vision it is possible to resolve 1/60th of a degree of an arc), it is possible to estimate when the differences between resolutions will become apparent
#16
Moderator Alumnus
Originally Posted by NetEditor
Did you happen to read the article?
Ya, I've read it before. Also re-read it again when you posted it. That how I caught it's not accurate. However even they claim it to be an estimate to save some face.
I've also spent a lot of time reading other discussions by ophthalmologists regarding human eye resolution. In regards to megapixels and photography. Also the perceived vision and what's actually received by the brain.
Some studies done with patients show people with 20/20 vision can distinguish lines separated by 0.6 arc-minutes or 0.01 arc degrees. Using this data it's been calculated that the human eye can see over 560 megapixels of data with both eyes combined. Your eyes actually see two different things simultaneously and your brain stitches them together.
To say the human eye with 20/20 vision can't distinguish between 1 million (720p) pixels and 2 million (1080i) pixels from 10' on a 65" screen isn't true like the chart says. Using other calculations based on vision it comes to about 10' on a 65" screen. Where as using that chart you'd need a 75" screen almost at 10'.
http://www.tvtechnology.com/features...features.shtml
I guess who knows who's really accurate, who who's eyes your using for the test...
To be argumentative in your defense you'll find people who cannot see the difference between 480p and 1080i no matter where they are standing. And obviously the source material matters when making a comparisons of resolutions. And also the display being used to present the data. As not all 1080p displays are created equal nor do they handle the video signal inputs the same. Some TVs butcher a 1080i signal down to 540 lines. And of course past a certain distance from the screen you can't honestly tell the difference.
Again, I'd just rather see a scientific study done by an ophthalmologist using a reference 1080p display that has excellent motion resolution. Than some made up estimated numbers... I just seemed the chart you posted was a little too far off to me.
I conceded it is good as a general chart. But I wouldn't purchase a TV using it. So knowing that I'm not sure what exactly it's good for. Anyone feeling geeky enough can use the algorithms in the link I provided to see what their actual visual resolution vs distance would be.