TV overscan - Page 2

Lew · 18-01-2011, 08:25

Quote:

Originally Posted by looper35uk

As Tweedy says, set your stb for 1080 wide, all programmes will be shown in their original aspect ratio.

You have it the wrong way round. The wide modes do the opposite of what you're saying and stretch 4:3 SD programmes to fit the screen.

---------- Post added at 09:25 ---------- Previous post was at 09:24 ----------

Quote:

Originally Posted by TheDon

To explain as many people seem to not be getting it, on SD the top few lines are often filled with junk which is encoded data for closed captioning and teletext. If you have your TV set to just scan (or 1:1 pixel mapping or whatever it calls it) you'll see this encoded data on the top line of pixels flashing away, the way to hide it is to turn overscan on (because all SD tvs were assumed to have overscan as it was in the nature of how CRTs work).
Turning overscan on when your box is set to HD though will not just hide this unwanted data, it will also crop the picture on a HD image that doesn't need overscan.

I have the same issue on my TV, but I've learned to ignore it.

DaMac · 18-01-2011, 08:31

Quote:

Originally Posted by Lew

You have it the wrong way round. The wide modes do the opposite of what you're saying and stretch 4:3 SD programmes to fit the screen.

You should be very careful watching 4:3 programs in 4:3 on some plasmas, it will wreck your screen.

Stephen · 18-01-2011, 09:42

Quote:

Originally Posted by DaMac

You should be very careful watching 4:3 programs in 4:3 on some plasmas, it will wreck your screen.

No it won't.

steveh · 18-01-2011, 10:06

Thanks for all your comments.

To me it does seem a bit of a flaw that set top boxes don't take account of overscan when upscaling SD content, but if HD TVs out of the box are all set for overscan on HD content then I guess for most users it isn't an issue. It does seem wrong though that SD content then has to be rescaled both in the set top box to convert it to HD and then again in the TV to remove the edges.

---------- Post added at 11:06 ---------- Previous post was at 11:02 ----------

Quote:

Originally Posted by DaMac

You should be very careful watching 4:3 programs in 4:3 on some plasmas, it will wreck your screen.

With normal usage it shouldn't be a problem.

This is a good summary: http://reviews.cnet.com/plasma-burn-...-need-to-know/. Also mentions that some set top box companies in the States have an option to set the bars on the side of 4:3 broadcasts to grey for plasma users, which the Virgin boxes don't do yet.

Daveymc · 18-01-2011, 10:31

I have LG full HD and i have a samsung v+ What setting is the best 720, 720 wide,1080, 1080 wide? Virgin guy said age's ago that its 720p and 1080i on the v+ boxes?
I've tried both but i just don't think its still not a smooth picture.
Sorry to jump in on this post with a question.

DaMac · 18-01-2011, 18:47

Quote:

Originally Posted by Stephen

No it won't.

http://www.plasmasaver.com/burnin.html
http://answers.yahoo.com/question/in...8174902AAuGfmr
http://www.avforums.com/forums/plasm...rn-plasma.html

p.s. i have personally seen it on screens, especially over time.

---------- Post added at 19:47 ---------- Previous post was at 19:41 ----------

[QUOTE=steveh;35154348]
With normal usage it shouldn't be a problem.

QUOTE]

some peoples tv's are on 24 hours a day, and these people have no idea how to stretch the screen, never mind why they should. also the grey bars is a semi good idea, but so would sending a '4:3 full' signal change on the hd channels that arn't transmitting hd content i.e. CH4 HD / E4HD with friends etc.

pauldavies83 · 19-01-2011, 08:51

Quote:

Originally Posted by DaMac

but so would sending a '4:3 full' signal change on the hd channels that arn't transmitting hd content i.e. CH4 HD / E4HD with friends etc.

This would be great if they did it - never understood why they don't. Is it a technical limitation somewhere?