interlacing questions

[joecool]

folks,

so, i know that interlacing is the trick used by "standard" tv to paint the screen 1/2 at a time - first the odd lines, then the even lines, then the odd lines, etc. and i also understand that this leads to some annoying artifacts when the image is moving - you can actually see where the odd and even lines don't match up, since in the last 1/2 frame the moving object was in a different location than it is in the current 1/2 frame.

what i want to know is, is there any way to get rid of this? btv has a check box where you can "de-interlace" the video stream, but this doesn't seem to improve anything - i can still see the banding in high-motion frames. what exactly is deinterlacing supposed to do? my movie apps (ulead, pinnacle, adobe) all have this feature as well, but the results are always the same - no improvement! is there any way to actually edit the video stream that removes these annoying artifacts?

thanks,

joe

 

[JonnyBlaze]

virtualdub has a good de-interlacer

 

[Peter]

... but all the deinterlacing software only works if the digitizing card provides the correct odd/even field information. I'm looking at TV from a PCI card right now (on the 2nd screen). This has an advanced deinterlacer running (at the expense of 20% CPU load at 800 MHz on this here cool&quiet Athlon64 2800+), and the comb effects are entirely gone. The screen is big, so one can spot what it's doing - in areas of high motion, this deinterlacer is halving the vertical resolution, extrapolating every field onto odd and even lines. Still areas are merged for full resolution. Tricky, and neat. This is linux "tvtime" application, and a PCI TV card based on the current Philips chipset, btw.