This HDMI to SDI converter allows you to seamlessly convert an HDMI or DVI signal to a broadcast quality SD-SDI / HD-SDI / 3G-SDI signal. It's not only widely applied to post-production and broadcast applications, such as: broadcast room and non-linear editing, but also to the field of optical transmission with HDMI ports on the equipments.  
  http://www.adaptorcable.com