A video-on-demand system transfers video content signals to a first communication system. The video-on-demand system transfers a control screen signal to a second communication system and receives a video control signal from the second communication system. The video-on-demand system implements a viewer...http://www.google.es/patents/US6754907?utm_source=gb-gplus-sharePatente US6754907 - Remote control of video-on-demand system
