Dynamic feature extraction from compressed digital video signals for content-based retrieval in a video playback system

摘要

A video playback system includes a receiver coupled to receive an input compressed digital video signal. An encoder, coupled to the receiver, dynamically extracts features from the input compressed digital video signal and encodes the extracted features as content descriptors, while receiving the input compressed digital video signal. A search engine, coupled to the receiver, accesses the received input compressed digital video signal according to the content descriptors via a user interface.