Copy control using digital speed bumps
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United States of America Patent
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-
Oct 23, 2007
Grant Date -
Nov 17, 2005
app pub date -
Jun 23, 2003
filing date -
Jul 17, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digital media recorder and a method of controlling such are provided. During attempts to copy media content, sub-sequences are extracted from an input media sequence. A digital fingerprint of the sub-sequence is calculated and compared with at least one first reference fingerprint from a database. The outcome of the comparison determines the action to take in the further processing. Recording of the input media sequence on a media carrier is either allowed or obstructed, e.g. disallowed. In the case recording of the sequence is allowed, the database is updated with information that the digital media sequence has been recorded.
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