In accordance with the present invention a filtering process is based on the output side of a multimedia decoder. A navigator, located at a server system, monitors the current play position of multimedia content at a consumer system and compares that position with navigation objects. Each navigation...http://www.google.de/patents/US20090249176?utm_source=gb-gplus-sharePatent US20090249176 - DELIVERY OF NAVIGATION DATA FOR PLAYBACK OF AUDIO AND VIDEO CONTENT
