The problem is the decoding, assuming that you want more than just the free-to-air channels(NRK 1,2,3).
Just about any DVB-T card will receive the signal and output the mpeg stream, no matter what encoding is used in the broadcast. But without decrypting encoded channels.
I have used a Hauppage HVR-4000 to successfully receive the NRK channels, but for the other channels, you need to use a card which can use a CAM from the provider. I think I have seen the FloppyDTV mentioned as a way of getting this to work, as you may have seen elsewhere. Haven't tried though.