Hello

I recently got a SOny Handycam DCR TRV22 and have been uploading footage onto my computer. The only problem was the footage wasn't very clear, it had many digital squares and just didn't look good. I had been uploading it with just a USB cable. I then purchased a Firewire cable, and the quality improved, but it still wasn't very good. So now I think I might need a new updated Videocard. Anyone have any recomendations or know a way around buying a new card? Anyone have any ideas? Thanks in advance