Yes, HDMI wireless transmitters. I was thinking of the Peerless HDS100 transmitters that use wireless-N technology. The main receiver is located in the room right next to the covered patio. I could drill a hole through the concrete into the room but I am exploring the wireless options to avoid that. The AV receiver inside the house would be about 20 ftaway from the TV if I drilled a hole. The patio is pretty huge and covers the length of my house about 35 feet long by 12 ft wide broken up into a sitting area and a grilling/eating area- ALL COVERED.
I was thinking of getting the HDMI in and then doing something to get audio from there to some speakers that I can mount towards the ceiling. I would like a nice subwoofer to kick up some bass but I don't think it is feasible on a flagstone patio. What type of AV source are you thinking of? A full new receiver or something less expensive?