They are a straight extraction from the disc, so no quality loss at all, but the original quality isn't all that hot. At first glance you think WTF they look more pixelated than the OCP captures, but then you realise that the analogue capture process used has effectively blurred and softened the original footage. You would seriously need to run this footage through some filters but there *is* more detail there to work with than the OCP captures, and it is easier to ramp it to the desired framerate as you are at least starting off with the original progressive frames.
I'll get over to a house with broadband and up as much as I can tonight.