[mythtv-users] Almost-square pixels (was Re: Fonts unreadable in GDM/Xorg with Ubuntu)

[Nick Morrott]

On 09/03/07, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 03/09/2007 01:53 PM, Willy Boyd wrote:
> > I'm
> > pretty sure I am using square pixels.  1360x768 with 1:1 pixel mapping
> > on my LCD.
>
> I've always wondered about that resolution.  It's what I would call
> "almost-square."
>
> I'm assuming you have a 16:9 TV (otherwise, it doesn't even fit the
> almost-square description).  If so, pixels would be square if the ratio
> of the X resolution to the Y resolution is 16:9.  Doing some math:
>
> 1360 / 16 = 85
> 85 * 9 = 765
>
> So, technically, 1360x765 resolution would be square pixels on a 16:9
> display device.  In reality, the difference is within rounding error for
> DPI/DisplaySize/font size calculations, so it won't make a difference
> whether you use DPI (which is close) or DisplaySize (which would be exact).
>
> So, does anyone know the story behind the choice to use 1360x768 for
> some devices (seems to be especially LCD's and Plasmas)?  It's not
> important, but I finally had a reason to mention the issue in case
> someone out there has some info and a willingness to teach me...

Some relevant info from wikipedia:

http://en.wikipedia.org/wiki/WXGA

Nick
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