Deinterlace

[mrxtc89117]

If I connect my pvr directly to a PC monitor (CRT/LCD) do I need deinterlacing. I dont understand this fully. I've googled and searched the forum.

I understand that standard tv displays video interlaced, or am I wrong,

I'm using purevideo decoder and am thinking of buying a 37 inch LCD with a vga port connector at the back. Or is it better just to use dvi to hdmi. Thanks

[sub]

Even though the source is interlaced, and you're intending to display the video on an interlaced display (ie connected to TV via composite/svideo inputs or interlaced component input), then it still needs to deinterlaced before eventually being reinterlaced by the video card on its way to the TV. Even though you'd think it could be interlaced the whole way through the system, that is not the way it works. There is not a 1:1 mapping between the lines in the frame buffer and the lines on the screen, and other things like aspect ratio control also make this mapping impossible.

[pastro]

Even though the source is interlaced, and you're intending to display the video on an interlaced display (ie connected to TV via composite/svideo inputs or interlaced component input), then it still needs to deinterlaced before eventually being reinterlaced by the video card on its way to the TV. Even though you'd think it could be interlaced the whole way through the system, that is not the way it works. There is not a 1:1 mapping between the lines in the frame buffer and the lines on the screen, and other things like aspect ratio control also make this mapping impossible.

Is that always the case?
Seems like there are three cases for mpeg encoded data.
Interlaced data that is encoded with both even and odd fields.
Interlaced data this is encoded as a single field.
Progressive data.
In all three of these cases you are saying the data is converted to progressive (or left alone) and then interlaced on the way out?

[sub]

Yes, I'm fairly sure thats the case - even though I've not explicitly tried it here.