Patent ID: 7286451

Claim:
A method of controlling a digital media recorder capable of recording digital media sequences on a digital media carrier, comprising the steps of: extracting, from an input media sequence, a media sub-sequence, calculating a sub-sequence digital fingerprint from the media sub-sequence, comparing the sub-sequence fingerprint with at least one first reference fingerprint, said first reference fingerprint being fetched from a primary database of fingerprints, yielding a first comparison value, depending on the first comparison value, allowing or obstructing recording of the input media sequence on the media carrier, comparing the sub-sequence fingerprint with at least one second reference fingerprint, said second reference fingerprint being fetched from a secondary database of fingerprints, yielding a second comparison value, depending on the second comparison value, storing the fingerprint in the secondary database, depending on at least the first comparison value, updating the primary database with information from the secondary database that the digital media sequence has been recorded on the media carrier.