HDV choppy when slowed.

Hi there,
I'm editing a TV show that was filmed on HDV, btu will eventually be downconverted to SD. In order to do the main edit of the show; before graphics are added, I'm editing in an HDV 1080i60 timeline, which is how the footage was captured.
The problem is, we often have to slow-mo our B-roll, which I do simply by setting the clip speed down. However, when I do this the footage because bizarre and choppy in its motion.
This effect can be replicated in SD by slowing down and reversing clip speed. Normally I resolved it by simply de-iterlacing the footage, however this doesn't seem to have any effect, which I expected as I know the HDV codec has some unusual interlacing properties.
Is there any way to rectify this problem and actually slow down HDV footage? And would the problem simply recur if I brought it into an SD comp to downconvert it? (I don't have immediate access to the comp, so I can't check)
Thanks,
--Michael

Michael,
I would suggest that you convert the bits you want slower to DVCPro HD via Compressor and do your slow motion there. This should help and leave you with a higher resolution clip. You could then reconvert it back down to HDV to put it in your timeline.
As for going down to SD, you certainly could and you would probably not get the same oddities added by HDV, but I would recommend that you stay HD as long as possible.
Hope that helps!
~Luke

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