720p or 1080i??

[Deciazulado]

Originally Posted by Blackraven

I guess so, unless it's fast motion (where 720p is the victor) like in sports games.

ok Blackraven I'll do the math for you again:

720p = 720 x 1280 at 60 frames per second = 921,600 pixels 60 times a second

1080i =1080 x 1920 at 60 interlaced fields per second = 1,036,800 pixels 60 times a second.

1,036,800 > 921,600

And that's w/o any fancy motion tracking/adaptive deinterlacing interpolation, just with bob.

Another angle: While vertical resolution with bobbing is just 540 (25% less than 720) and dribbling balls might look a little worse there, most sports (unless it's diving) have their motions mostly be in the horizontal direction (because mmm humans (and horses!) tend to do sports running in flat surfaces ya know ) So on 720p 60 you have things running left and right at 60 frames per second inside a 1280 pixel resolution width. On 1080i 60 bobbed, you have things running left and right at 60 frames per second inside a 1920 pixel resolution width.

so not only the overall frame is 1,036,800 > 921,600, but the important horizontal motion is 1.5x better: 1920 > 1280 a factor of 50%

And again this is w.o any fancy deinterlacer.


With a good deinterlacer it can approach 1080 60p

Originally Posted by mlgacc

I might be a little off topic but my 47 inch Panasonic is a few years old now and is a 1080i TV with NO 720p..... only 480P and I find it is a better picture with a blu ray movie with only 480p checked. as for gaming i cant say there is a difference with the 1080i checked. any reason for that ?

Ok let me see. You have a Panasonic TV that accepts 1080i but the display itself (it's real (native) resolution) is only 480p? (like a 480 x 853 plasma?)

And Blu-rays look better with the PS3 checked to 480 instead of 1080?

Well if you select 1080i on the PS3 your TV accepts the 1080i signal and downscales it to 480p. If you select 480p on the PS3, it's the PS3 what downscales the signal into 480p, and your TV then uses that. In both cases you're getting 480p, so there shouldn't be much difference, or if there is, one reason could be just because one device downscales to 480 better than the other (in this case the PS3) and/or the signal path is "cleaner" then.

As to why 1080i for games makes no difference, well if they're 720 games I think the PS3 does those as 480 even if you have checked 1080i, (I only have one 720 game and I'm doing 1080p HDMI so I havent tested this "extensively" ) and as your TV doesn't accept 720, checking 720 won't work. So on both 1080i checked and 480p checked with 720 games the PS3 would be giving your TV the same: 480p?

Another possible reason for discrepancies could be those pesky 0-255 computer levels and 16-235 video levels differences, which might inadvertently make one output/type look different from the other (game RGB, video Yuv, etc) if you haven't checked and set the correct one for the type of output/input/display.

[Streetspirit]

I play my blu-ray movies on my PS3, but my question is: since my TV is only a 720p/1080i Westingtionhouse and not the full 1080p at what resolution are my blu-ray movies played becasue I heard blu-ray doesn't play in 720p? is it 1080i?

[Camulus]

https://forum.blu-ray.com/showthread...newpost&t=7524

[ra1024]

It actually depends on your native resolution. Most tvs made in the past few years have a native resolution (vertical) of 768. It is possible to even have a set that is 1080P and still only have 768 pixels. This would mean your 1080P signal is downsized to fit the native resolution. I don't know why they standardized on 768 when it fits neither signal resolution but just check your sets native resolution and that will tell you what you want.

To get the most out of HD content, you'll want a set with a native resolution of 1080 and one that can accept a 1080P signal (preferably a 1080P/24).

[NovaBomb]

If your TV states it can play a max res of 1080i, you are getting 1080i on your PS3 if you have that res active in your options. You can tell what your PS3 is outputing by the size of the menu options when you hold down the PS button. Play around with it for a while, try turning off 1080i, and just have 420p & 720p active, and see how it looks. Personaly, I think watching Blu-ray movies on 1080i is looks better then 720p, even though other people seem to disagree.

[ra1024]

Originally Posted by NovaBomb

If your TV states it can play a max res of 1080i, you are getting 1080i on your PS3 if you have that res active in your options.

That's not correct. The signals contain a resolution that usually doesn't match the tv's resolution resulting in scaling one way or the other. You can't get 1080 resolution on a set with a native resolution of 768.

[NovaBomb]

Originally Posted by ra1024

That's not correct. The signals contain a resolution that usually doesn't match the tv's resolution resulting in scaling one way or the other. You can't get 1080 resolution on a set with a native resolution of 768.

Ok, don't know enough to argue. I know when I bought my LG 42" LCD, it stated that it can play resolution 420p/720p/1080i. When I pluged it in with my PS3 thats what I got. If not, I wouldn't be very happy.

[ra1024]

Originally Posted by NovaBomb

Ok, don't know enough to argue. I know when I bought my LG 42" LCD, it stated that it can play resolution 420p/720p/1080i. When I pluged it in with my PS3 thats what I got. If not, I wouldn't be very happy.

Think about it this way. How could 2 different signals fit on the same screen size? 720P & 1080i are 720 lines and 1080 lines of resolution. The tv scales them up or down to fit. On a screen with 768 lines of resolution, 720P is scaled up and 1080i is scaled down. On a tv with 1080 lines of resolution, 1080i is not scaled and 720P is scaled up. I think you're confusing signal compatibility with display resolution.

Another way to think about it is this. In a few years when the FCC (US) dictates all tv broadcasts are high def, people without HD tvs will have to get a converter box. At that point, their old standard def sets will be displaying a 1080i signal but they won't suddenly be seeing high def. The converter box will scale down the 1080i (or 720p) signal to fit on their old tvs that have 480 lines of resolution.

[ProvenFlipper]

Originally Posted by ra1024

Another way to think about it is this. In a few years when the FCC (US) dictates all tv broadcasts are high def, people without HD tvs will have to get a converter box. At that point, their old standard def sets will be displaying a 1080i signal but they won't suddenly be seeing high def. The converter box will scale down the 1080i (or 720p) signal to fit on their old tvs that have 480 lines of resolution.

Signals don't have to be high def, just digital. Not to be picky, but I see this piece of misinformation spread all of the time.

[The Don]

Originally Posted by ProvenFlipper

Signals don't have to be high def, just digital. Not to be picky, but I see this piece of misinformation spread all of the time.

yeah i forgot to add this....SD will be made mandatory for all TV's and all channels will be digital....

[Deciazulado]

Originally Posted by Streetspirit

I play my blu-ray movies on my PS3, but my question is: since my TV is only a 720p/1080i Westingtionhouse and not the full 1080p at what resolution are my blu-ray movies played becasue I heard blu-ray doesn't play in 720p? is it 1080i?

Since your Westi at least accepts 1080i you should have 1080i among the checked optiions of your PS3. You'll PS3 will output 1080i from Blu-ray movies then.

On the display this will be displayed at the native resolution of the panel of your Westinghouse. Which is?

[freebird2003]

hello,

The Specs.

Picture/Display
• Aspect ratio: 16:9
• Brightness: 1000 cd/m²
• Contrast ratio (typical): 3000:1
• Viewing angle (H / V): 160 / 160 degree
• Diagonal screen size: 42 inch / 107 cm
• Display screen type: HD Plasma panel
• Panel resolution: 1024 x 768p

Supported Display Resolution

• Computer formats
Resolution Refresh rate
640 x 480 60Hz
800 x 600 60Hz
1024 x 768 60Hz
• Video Formats
Resolution Refresh rate
640 x 480i 1Fh
640 x 480p 2Fh
720 x 576i 1Fh
720 x 576p 2Fh
1280 x 720p 3Fh
1920 x 1080i 2Fh
1920 x 1152i 50Hz - 2Fh

i also have a philips plasma tv 42pf9966. i am planing to buy ps3 to play blu-ray movies. i have a few questions to ask you. is the auto stretch function enable when in 1080i via component cable ?? how is a quality ?? i am sofa is about 10 ft away from my tv ? do u are u using hdmi cable or component ? which is better for the best PQ to be obtiain from the plasma tv ?

Thanks alot

Please advise.

[Helicon]

1080i is actually only 540i, because it only represents one half picture. And remenber the screen has to de-interlac the picture.

Read more:

http://alvyray.com/DigitalTV/Naming_Proposal.htm

[baccusboy]

Whomever mentioned that sending 1080i to a 768p TV (1366x768) that accepts 1080i was correct when they said that the PS3 is sending 1080i through the wire, but the TV has to internally downscale it to fit the TV's native resolution of 1366x768.

On my TV, this looks better than sending in 720p, and having to rely on the TV to upscale it to 768p slightly.

Downscaling always looks better than upscaling (on my TV, anyway).

[Deciazulado]

Originally Posted by Helicon

1080i is actually only 540i, because it only represents one half picture. And remenber the screen has to de-interlac the picture.

Read more:

http://alvyray.com/DigitalTV/Naming_Proposal.htm

1080i is not 540i

it's twice 540i!

1080/540 = 2 :-P