Commercial video spots in a stream are replaced depending on matching with a fingerprint database

摘要

A system includes a video fingerprint database 5 which is generated at 4 by using a first algorithm to analyse a video stream 3 to identify repeating video sequences and automatically updating the fingerprint database 5 when new repeating sequences are detected. The system also includes a detection and replacement apparatus which is programmed with a second algorithm to detect a commercial spot by generating fingerprints of a video broadcast on 2, comparing the fingerprints to the stored fingerprints on a reference database 9 and when a match is detected triggering automatically a video switch to switch the source of the outputted video signal from the received broadcast 8 to a video output 10 having a replacement commercial spot. The detection and replacement apparatus also has a communication link to receive and store updates of the fingerprint database.