RE: [Algorithms] FPS Questions

[Robert D. <RD...@ac...>]

or it can display in non-interlaced mode, so the signal makes the scan lines
appear on top of each other, and you don't get the flicker.

thats what most consoles do when not in hi res mode.

-----Original Message-----
From: Stephen J Baker [mailto:sj...@li...]
Sent: 02 August 2000 16:26
To: gda...@li...
Subject: Re: [Algorithms] FPS Questions


On Wed, 2 Aug 2000, Leath Muller wrote:

> > So what do console games do about interlace artifacts?  Are they
actually
> > running at half the vertical resolution of broadcast TV - or do they
have
> > fancy antialiasing filters to deal with it?
> 
> It's just in the HW to pass the image out to your TV... as far as the
> console is concerned, it's just a set resolution, say 320x240. The image
> is split at the HW just before the video cable and after the internal
> rasterization etc HW... Same as the ol' Amiga, Atari ST, etc...
 
Ah - that explains it.  Since TV's have ~480 scanlines (NTSC) - or
640 (PAL), the console must be repeating each scanline twice at 320x240,
so there is no interlace issue and it can effectively pretend to be
a 60Hz non-interlaced display.

Steve Baker                      (817)619-2657 (Vox/Vox-Mail)
L3Com/Link Simulation & Training (817)619-2466 (Fax)
Work: sj...@li...           http://www.link.com
Home: sjb...@ai...       http://web2.airmail.net/sjbaker1


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