[mythtv-users] dnr_* settings info

[Myth TV]

Does anyone have the *definitive* word on what these settings do or their
ranges?  I've been playing with them and found that dnr_mode=3
dnr_temporal=1 and dnr_spatial=1 stops the lower half screen flicker/jump
I get when watching LiveTV.

I'm happy that it seems to greatly reduce these glitches, but I would love
to know what I've been playing with.  Also are they binary values
(temoral, spatial, and type) or are there ranges of values?