HDMI getting wireless interference?

Lately ive noticed that my video has gotten jumpy (freezes for a split second) and my audio makes some gross noises when this happens. I have it hooked up with HDMI. after some tinkering i found that this doesnt not happen when i disconnect from my wireless network. has anyone else heard of this issue and know any fixes? thanks a bunch!

im connected using wireless N, 2.4Ghz, wpa2-personal. not sure if that helps, oh and im running windows 7 ultimate x64

 

OK so I played with the router settings for a bit and found that if i set the channel width to 20Mhz it doesnt mess up my HDMI signal but if I set it to 40Mhz it does. Does anyone know what would cause this issue?

 

I'd check that all connections, inside and outside the PC were tight.

 

I reseated all the components involved and cables... no success

for now I'll just have to use 20Mhz channel instead of the 40