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.com.au/patents/US6889383?utm_source=gb-gplus-sharePatent US6889383 - Delivery of navigation data for playback of audio and video content
