An information storage medium has user data areas and additional data areas, and sync patterns to distinguish the additional data areas from the user data areas. The information storage medium includes a user data area in which user data is recorded and an additional data area located in at least one...http://www.google.de/patents/US7864648?utm_source=gb-gplus-sharePatent US7864648 - Information storage medium having additional data areas and method of recording/reproducing the same
