Optical record carrier and apparatus for recording and reproduction of optical record carrier

摘要

An optical record carrier for recording information along tracks provided on the carrier. First information as main information and second information relating to control information for the reproduction of the first information are recorded. In addition, third information which is different from both said first and second information is recorded in association with the second information such that when the first information is reproduced based on the second information, the third information is not directly contained in the first information after demodulation. The third information is carrier specific information provided e.g. by the manufacturer and is easy to detect but difficult to reproduce, thereby providing protection against unlawful copying of the information record carrier. <IMAGE>