Re: Why deinterlace?

PC operating systems have always worked with full frame display buffers and
therefore with progressive scan PC monitors. So PCs have always passed full
frames to their graphics cards.

If the input is interlaced such as HDTV 720p format or is from a PC
application it is not de-interlaced. Unless after it is passed to the
graphics card the card is asked to output it using an interlaced format to a
particular display device other than a PC monitor (via VGA) such as a TV.

"mbg" <womblekewl@xxxxxxxxx> wrote in message
news:MPG.1d41b2a77b2947a5989681@xxxxxxxxxxxxxxxxxxxxxxx
> This may be a dumb question, but maybe someone will answer it anyway
> Everything in my post assumes an NTSC system.
>
> If I have an interlaced source coming into my PC, such as an NTSC analog
> cable signal, and I am outputting this signal using MCE 2005 to a rather
> unfancy, non-progressive 27" TV, why do I need deinterlacing at all? If
> the input it interlaced, and the output device will show the content
> interlaced, why do I need to deinterlace in between?
>
> My input hardware is Hauppauge PVR-500MCE, and my output hardware is
> GeForce FX5200.
>
> Thanks for any help.
> Matt.


.