I'm not saying this is the most practical or affordable solution compared to a more specialized product, but if you definitely want a hardware solution, I do know (depending on your HDMI spec requirements) this would be achievable with any FPGA dev board that has HDMI In/Out. I can't say I've worked on this exact solution, but I did some basic development with a Xilinx (Z7?) board years ago that involved overlaying and modifying an incoming HDMI signal. What you're looking for should be achievable by the same means assuming there's no signal issues I'm failing to account for.
No comments yet.