How HDMI Works
If you’ve shopped for an HDTV, a PlayStation 3, or an HD-DVD or Blu-ray player, you’ve probably heard about HDMI. It can seem like just one of many connections on televisions or home-theater receivers. But HDMI is more than a port on the back of a TV (and the often expensive cable that fits inside). It’s a set of rules for allowing high-definition electronic devices to communicate.