dude, i'm the first one to admit that i know next to nothing about the science behind electronics and can't tell you for sure (obviously) what you're experiencing, but i would suggest trying one in your situation.
i've had shunyata, ps audio (passive), and audience conditioners in my systems, and the ps audio ones made the biggest improvement in video. i would try something like a ps audio quintet from a company with a return policy if you're not sure about it (if you shop around, you can find them "on sale" a few places...). quintets have a cable hook up as well, so if your signal is getting junk directly on the cable line maybe it could help it that way, too.
i have my cable box on a upc200 and my lcd tv on an ultimate outlet, and they cleaned up the picture noticeably and cured my banding issues (the conditioner on the cable box/dvd player seems to have a greater effect than on the tv itself, actually).
shielded cables to the tv, the dvd, the cable box, and the power conditioner help noticeably as well.
good luck, though, keep us posted of any results.
i've had shunyata, ps audio (passive), and audience conditioners in my systems, and the ps audio ones made the biggest improvement in video. i would try something like a ps audio quintet from a company with a return policy if you're not sure about it (if you shop around, you can find them "on sale" a few places...). quintets have a cable hook up as well, so if your signal is getting junk directly on the cable line maybe it could help it that way, too.
i have my cable box on a upc200 and my lcd tv on an ultimate outlet, and they cleaned up the picture noticeably and cured my banding issues (the conditioner on the cable box/dvd player seems to have a greater effect than on the tv itself, actually).
shielded cables to the tv, the dvd, the cable box, and the power conditioner help noticeably as well.
good luck, though, keep us posted of any results.