Confusion about interlacing

[comptechltd]

I have been using BeyondTV for a while with fairly positive results. I have just upgraded my system and TV and am a little confused. My system now connects to a Hitachi 65TWX20B through an ATI 9200SE via a DVI connection. This system is a dedicated PVR / DVD Player / MP3 Player.

Do I need to use de-interlacing or not????

My TV will display 480p, 540p, 720p and 1080i. I get terrible overscan that I cannot even reduce with Powerstrip at all resolutions except 856x480 and 640x480.

I have been reading everything I can but am still confused. Anyone care to offer asdsistance???

Steve

[Baylo]

All I can suggest is to try with and without deinterlacing and see what happens. I doubt you'll break anything.

To be honest, I thought I understood the process: if outputting to a TV, don't deinterlace; if outputting to a monitor, deinterlace.

Now, I have a Shuttle pc with onboard Geforce graphics outputting to a TV (through my receiver). I had deinterlacing turned off. But I would notice shearing of the picture when the camera panned horizontally. Also, 'ticker text' like the CNN crawler was very jumpy. I didn't think this was a deinterlacing thing because I know that deinterlacing affects every other line in a frame, not big blocks of the picture like I was seeing (like when the camera panned the top half of the picture would lag behind the bottom half).

Anyway, last night just for kicks I set BTV to 'hardware deinterlacing'. WOW - huge improvement in the picture. No more shearing, or jumpiness in text crawlers. All I can think of is that the Geforce chip was screwing up the fields that it was getting from BTV, and setting BTV to deinterlace somehow fixed it.

I don't know. My brain hurts. But the pictures good, and that's all that counts.

Mark

[jkoon]

I think it’s a problem with the video card’s output and the tv’s refresh rate (for lack of a better word) do not always sync up and that’s why you can still see the lines and stuff.