Systems and methods for providing enhanced navigation of stored digital video content based upon an event index. Includes generation and storage of an event index, as well as navigation based on events in the event index. An example system is embodied in a digital video recorder that detects and stores...http://www.google.com.au/patents/US7251413?utm_source=gb-gplus-sharePatent US7251413 - System and method for improved blackfield detection
