Copying, dubbing or reproducing copyrighted digital data can be inhibited or restricted to properly protect a copyright. AV data recorded on a pre-recorded tape is output from a reproducing unit of a first digital VCR with protective information indicating whether the copy of the AV data is inhibited...http://www.google.de/patents/US7265927?utm_source=gb-gplus-sharePatent US7265927 - Recording medium and apparatus for protecting copyrighted digital data
