Re: Why deinterlace?

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If the input is interlaced such as HDTV 720p format ... 

HDTV 720p isn't interlaced?  Did you mean to say progressive?  :-)

--
-Bob
_______________________________
Microsoft MVP
Windows XP Media Center Edition
http://www.microsoft.com/ehome


"JW" <anonymous@xxxxxxxxxx> wrote in message news:Oi7bTDWiFHA.3540@xxxxxxxxxxxxxxxxxxxxxxx
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. 


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