If a video source is placed far from the TV in your installation, then it’s difficult to control it using IR remote control. The Sewell InjectIR fixes that problem by sending IR signal over existing HDMI cable. It uses CEC (Consumer Electronics Control) channel and costs just $44.95. So, you don’t need additional wires or any wireless solution.
I’d like to mention some modern TVs might use CEC channel to route specified IR commends to the Blu-ray player or AV receiver connected via HDMI cable. But it works mostly with devices produced under the same brand.