A system and apparatus are provided for selectively terminating an analog video signal depending on whether or not a terminating device is present. A conditional terminator receives an analog video signal from a video input and terminates the video signal in the absence of a terminating device and does...http://www.google.de/patents/US7633560?utm_source=gb-gplus-sharePatent US7633560 - System and apparatus for selectively terminating a video signal based on the presence or absence of a terminating device
