On 09/10/2011 11:27, RussellMc wrote:
> Note that that "low rez" is 640 x 480 VGa =3D std TV quality +.
>

It's tiresome that VGA is progressive square Pixel  version of NTSC 525=20
lines.

Since 1960s TV is 625 lines in a lot of the world, that's 768 x 576 in=20
square pixel progressive. 576 lines visible. Also with SD Digital TV the=20
US & Japan gets 720 x 480 but the 625 line world gets "short changed" to=20
720 x 576.

As far as I'm concerned "minimum" TV resolution is 544 x 576. The 640 x=20
480 is only use to me in a window on a PC screen. Esp. if its 60fps or=20
30fps 60Hz interlaced.

so I regard 640x 480 as US/Japan std TV quality+ but for Europe, Africa,=20
Russia, Australasia etc its "std TV -"  as it's missing to many lines=20
and wrong frame rate. Lighting has 50Hz or 100Hz flicker. TVs are=20
generally 25fps except for some HD models.

--=20
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