Is SED Fixed Resolution?

[Sarah Nya]

See topic.

I'm just interested if this will be the case and if so will we still have the same problems displaying at a non native resolution as with LCDs?

I really would like an HD TV that can handle SD as well

[jaguar]

As a friend once said to me "We can't solve problems we can only replace them with other problems."

[chedmaster]

It is fixed resolution, it has loads of tiny CRTs (basically) that make a pixel each, nothing is scanned like a CRT.

[Sarah Nya]

So does that mean we will have the same problems ?

Anything better in the pipeline?

[James Day]

Originally Posted by Sarah Nya

So does that mean we will have the same problems ?

Anything better in the pipeline?

There doesn't need to be anything better - if and when SED's come to market they will almost certainly all be at a 1900x1080 resolution. That is more than high enough to display a SD picture without problems. (In fact the vertical resolution is exactly twice that of SD, which makes scaling easy)



James

[Sarah Nya]

I hope so, it would be lovely to have a screen that does it all.

Just have to be patient now...

[chedmaster]

Originally Posted by James Day

There doesn't need to be anything better - if and when SED's come to market they will almost certainly all be at a 1900x1080 resolution. That is more than high enough to display a SD picture without problems. (In fact the vertical resolution is exactly twice that of SD, which makes scaling easy)



James

SD is 576 so not exactly twice. All the screen needs is a good scaler but this will make the prices even higher

[sdc395]

PAL SD is 576 lines but doesn't that include the overscan area which can be cropped to 540 lines without loss of important picture info?

[James Day]

Originally Posted by sdc395

PAL SD is 576 lines but doesn't that include the overscan area which can be cropped to 540 lines without loss of important picture info?

That is my understanding as well.

James

[chedmaster]

PAL is 625 lines (including the bits that are already cropped to make 576), overscanning is hardly state of the art, fixed pixel displays shouldn't overscan at all really. If you want your very expensive state of the art TV to cut off some picture then thats fine!

[sdc395]

I think I'd happily sacrifice some redundant scanlines in exchange for better picture quality. Scaling is every flat panel's Achillies heal, IMO.

[JagoPlasma]

Originally Posted by chedmaster

PAL is 625 lines (including the bits that are already cropped to make 576), overscanning is hardly state of the art, fixed pixel displays shouldn't overscan at all really. If you want your very expensive state of the art TV to cut off some picture then thats fine!

correct, listen to what he said

and 1080 is 1125 lines

[LV426]

PAL is 625 lines. 49 of those lines contain no picture information whatsoever. They contain switching information and other stuff which instructs the display on how to make the picture.

The remaining 576 lines contain picture.

Overscanning is not done so as to reduce the 625 to 576 i.e. to hide the 49 lines that contain no picture.

Overscanning is done ON the 576 lines that remain. It is an intentional and correct part of any SD TV system that 5% of the height and width of the picture (that's the 576 lines) are not displayed. A correctly adjusted display will therefore overscan by 5% in both directions and hence display something like 550 lines.

Even a "digital" display should do this. It's often the case that an SD TV picture contains junk in the extemities of the image - for example, anything sourced from or played back on tape will have headswitching distorion at the bottom. It is quite right and proper that this is hidden, even in a digital display.

I suspect, though, that the "correct" percentage of overscan will be less than 5% for High Definition, but I haven't yet seen this specified anywhere. I'm sure it is, but I haven't seen it. I doubt, though, that it will ever be zero.

[FlyingBig]

Does this mean that dead pixels will still be a poissibility? If so i am disappointed.

[DanDT]

Originally Posted by FlyingBig

Does this mean that dead pixels will still be a poissibility? If so i am disappointed.

Of course it's "possible". But i don't know why you should be disappointed, unless it happens to you. In which case you can always return the bloody thing.