Originally Posted by leftyman
Hi, New to LCD's and HD content and I have a question..
I received a LG 37 LG30 Lcd for Christmas and so far Im loving it, and HDTV in general.
Ive been toying with the picture and for the most part leave it on either the cinema or game settings, although I am going to try MoonRabbits settings and cnets settings.
The setting that most baffles me however is the "just scan" setting...I vaguely understand it as 1 to 1 pixel matching and that means the signal is place on the tv with no scaling?
Can someone explain the benefits of this to me in terms I can understand?
We watch mostly 80% regular television programing on the HD channels..10% SD channels.. and 10% dvd's on a regular dvd player that does not upscale as far as I can tell.
Thanks for any help!
Just scan = the tv does not overscan (or if you prefer zoom the image) when it receive a signal from a 720p/1080i/1080p source.
For example, if the source is 1280 x 720p pixels, you will exaclty see 1280 x 720p pixels on screen and not, for example, 1366 x 768p (image zoomed a little).
In general, a tv will overscan the source signal a little bit, generally ranging from 1% to 5 %.
Why does it do that? In the age of CRT tube, as the bulb lamp aged, the image on the screen would shrink over time, so the manufacturers were applying overscan so that the picture would always fit the screen.
Try it : toggle between just scan mode and 16:9 or set by program and you will see tha the picture is zoomed a little.
It is best to choose just scan when you can because any scaling apply to the source (e.g.: zooming) can degrade picture quality and resolution.