You won't find this feature listed on the spec sheet of your new TV. Just a few years ago, you could only find it used in high end TV production studios. Recent technological advancements have brought this powerful and exciting new capability direct to your living room!
Today we have smart TVs, the latest models which use Android TV, Fire OS, or Tizen can now perform these hardware blending operations WITHOUT ANY OTHER HARDWARE! If you don't have one of these TVs, most Android or Fire OS media streaming boxes (think Fire Stick) can also perform these functions. All you need is the right app and a little bit of time to configure what you want it to do.