You think your TV does 1080p ???

Johnnytoxic · 30 Jan 2007 at 15:56

I have been on a lot of av forums and its a popular belief that because there tvs support 1080 i/p they assume they are actually seeing that resolution.

Just like to clear this up by saying your only seeing the resolution your TV has actually got. so any 42" plasmas etc are not going to see the 1080 resolution, just a downscale.

Pug · 30 Jan 2007 at 16:00

well, i suppose some may assume that, but anybody who has researched it enough should realise that if there aren't enough pixels to display 1080 lines of information at once, then it isn't displaying 1080p.

However, it IS possible for some plasmas to display 1080i natively, namely the ALIS panels by hitachi and fujitsu. These have a 1024x1080 resolution, however as a side effect they cant display any progressive at all, and convert all signals to interlaced (i understand?)

Johnnytoxic · 30 Jan 2007 at 16:03

Pug said:
well, i suppose some may assume that, but anybody who has researched it enough should realise that if there aren't enough pixels to display 1080 lines of information at once, then it isn't displaying 1080p.

However, it IS possible for some plasmas to display 1080i natively, namely the ALIS panels by hitachi and fujitsu. These have a 1024x1080 resolution, however as a side effect they cant display any progressive at all, and convert all signals to interlaced (i understand?)

Yeah, I myself know a bit about tvs now but that resolution goes over my head. I mean where are the 1920 horizontal pixels at?

james.miller · 30 Jan 2007 at 16:05

yes mine does. Sony Bravia 40w2000

Johnnytoxic · 30 Jan 2007 at 16:09

james.miller said:
yes mine does. Sony Bravia 40w2000

how far do you sit from it.

james.miller · 30 Jan 2007 at 16:13

about 12-13 feet im guessing. 1080p does make a difference, despite what some people claim. the difference between 720p and 1080p on the 40" is quite large. the pixels on a 1080p display are a lot smaller (double the pixel density), but you only really see the difference with true hi-def material. upscaled dvd doesn't cut it.

I wouldnt bother getting a 1080p panel if it were any smaller however.

Johnnytoxic · 30 Jan 2007 at 16:17

james.miller said:
about 12-13 feet im guessing. 1080p does make a difference, despite what some people claim. the difference between 720p and 1080p on the 40" is quite large. the pixels on a 1080p display are a lot smaller (double the pixel density), but you only really see the difference with true hi-def material. upscaled dvd doesn't cut it.

I wouldnt bother getting a 1080p panel if it were any smaller however.

I was in A competitor the other day. A 40" 1080p hooked up to bluray. I took a few steps back and the extra detail vanished.

My eyes are not super sharp but there not bad.

SeriousPigeon · 30 Jan 2007 at 16:25

Pug said:
well, i suppose some may assume that, but anybody who has researched it enough should realise that if there aren't enough pixels to display 1080 lines of information at once, then it isn't displaying 1080p.

However, it IS possible for some plasmas to display 1080i natively, namely the ALIS panels by hitachi and fujitsu. These have a 1024x1080 resolution, however as a side effect they cant display any progressive at all, and convert all signals to interlaced (i understand?)

1080i has a horizontal resolution of 1920, which will have to be downscaled to fit into 1024. So whilst it may be able to display interlaced (by alternatively lighting the lines, it can't actually display 1080i natively. Also the ALIS panels have a res of 1024x1024.

pinkaardvark · 30 Jan 2007 at 17:09

Perplexed said:
1080i has a horizontal resolution of 1920, which will have to be downscaled to fit into 1024. So whilst it may be able to display interlaced (by alternatively lighting the lines, it can't actually display 1080i natively. Also the ALIS panels have a res of 1024x1024.

I thought the whole idea of interlacing was that you only needed half the resolution so 1024 should be fine for 1080i as it's more than half 1920. i.e. all 1920 lines are displayed but not all in the same frame but in alternate frames which causes the flickering effect of interlacing.

Or are we saying that because these TV's can't accept a 1080p input the base information/data simply isn't there to construct a true 1080 interlace?

Chong Warrior · 30 Jan 2007 at 18:25

I've been doing some reading up today on plasma's and the Toshiba 42WLT66 has a resolution of 1920x1080 yet it can only display 1080i and not 1080p. It's competition is the Panasonic 42PX600 and LG42PC1 which both only have 1024x780 resolution yet can also display 1080i and from a few reviews even have a better picture or at least as good!!

I don't underatand how a TV can have all those pixels yet not be able to display 1080p :confused:

I take it the two lower res TV's only downscale and actually display 720p in true terms?

Gerard · 30 Jan 2007 at 18:26

So the samsung LE40F71BX 40" which is a 1080p display is just downscaling from 1080p? :confused:

james.miller · 30 Jan 2007 at 18:28

Chong Warrior said:
I've been doing some reading up today on plasma's and the Toshiba 42WLT66 has a resolution of 1920x1080 yet it can only display 1080i and not 1080p. It's competition is the Panasonic 42PX600 and LG42PC1 which both only have 1024x780 resolution yet can also display 1080i and from a few reviews even have a better picture or at least as good!!

I don't underatand how a TV can have all those pixels yet not be able to display 1080p

I take it the two lower res TV's only downscale and actually display 720p in true terms?

thats how it works yeah. regarding the 1080i/p issue, its really down to the processing the tv is capable of. Possibly that tosh doesnt have the bandwidth to display 1080p in realtime.

Energize · 30 Jan 2007 at 18:56

pinkaardvark said:
I thought the whole idea of interlacing was that you only needed half the resolution so 1024 should be fine for 1080i as it's more than half 1920. i.e. all 1920 lines are displayed but not all in the same frame but in alternate frames which causes the flickering effect of interlacing.

Interlacing only halves the vertical resolution not the horizontal resolution, so you get 1920x540 per field. Lcds at least can't display interlaced though iirc.

chaparral · 30 Jan 2007 at 19:10

johnnyfive said:
I have been on a lot of av forums and its a popular belief that because there tvs support 1080 i/p they assume they are actually seeing that resolution.

Anything that is being display on a 1080i/p screen at full screen is going be displaying at 1080i/p..(as feeds like SD 576/HD 720p) is going be upscaled or stretched to fill the 1920x1080 pixels on the screen..

Chong Warrior said:
I take it the two lower res TV's only downscale and actually display 720p in true terms?

42" & 43" plasma's are not true 720p

As true 720p is 1280x720

Where 42" & 43" plasma's are 1024x768...even the alis plasma's are only 1024x1080i

panny 37" plasma is 1024x720

Gerard · 30 Jan 2007 at 19:29

All this talks making my head hurt,

Had that samsung in mind for a new tv now all of asudden people are saying it does\doesn't do proper 1080p, anyone wanna fill me in here?

Bigpops · 30 Jan 2007 at 20:17

Gerard said:
All this talks making my head hurt, Had that samsung in mind for a new tv now all of asudden people are saying it does\doesn't do proper 1080p, anyone wanna fill me in here?

The Samsung F71 series support 1080p fine. My mate's had this TV since just before christmas, and he runs his media PC, connected by VGA, at 1920x1080, which is 1:1 with the res of the panel, and it's progressive. I've also seen the Xbox 360 upscale games to 1080p connected by component, and HD-DVD from the Xbox in 1080i (as the xbox doesn't do 1080p over comonent on HD-DVD).

sparkymark75 · 30 Jan 2007 at 21:46

Bigpops said:
The Samsung F71 series support 1080p fine. My mate's had this TV since just before christmas, and he runs his media PC, connected by VGA, at 1920x1080, which is 1:1 with the res of the panel, and it's progressive. I've also seen the Xbox 360 upscale games to 1080p connected by component, and HD-DVD from the Xbox in 1080i (as the xbox doesn't do 1080p over comonent on HD-DVD).

I concur, mines been running with my 360 since before Xmas at 1920 x 1080

n3crius · 30 Jan 2007 at 23:01

james.miller said:
yes mine does. Sony Bravia 40w2000

mine too. 40w2000 in full glorious HD.

just been watching some 1080 trailers through the 360.

so... yes, i do!

Corasik · 30 Jan 2007 at 23:32

Panasonic Japan have announced the 2007 series of Plasma TV's Apparently the new 10th Generation 42 inch plasma is a major breakthough, they have managed to shrink the minimum plasma cell size to now permit a 1920x1080 progressive plasma panel at 42 inch!!!

Not sure when we can expect to see them in the shops, but they are really nice looking TV's totally black case on the prototype/japanese model.

That said at 10ft, 720p is more then enough resolution for a 42inch set, and my vision is just fine.

firstborn · 31 Jan 2007 at 00:56

chaparral said:
Anything that is being display on a 1080i/p screen at full screen is going be displaying at 1080i/p..(as feeds like SD 576/HD 720p) is going be upscaled or stretched to fill the 1920x1080 pixels on the screen..

Granted I've had a few beers tonight, but what in the name of god is that supposed to mean.....