Ok so when hooking up my computer to my TV i get a horrible constant buzz noise. I have the same problem with my laptop, except it goes away when i unplug it and just let it run on battery. So I'm guessing its some kind of ground loop problem. I remember reading a while back about putting some type of converter on the cable tv line to fix this, but I can't remember what its called.

Does anyone know what its called or if there's some other type of solution?