Optical Disc Having Combined Rom/R Area

Device for recording information on a record carrier carrying information represented by read-only marks in a track, the read-only marks being optically readable according to a predefined high-density data format via a beam of radiation by first variations of the radiation, the record carrier comprising a recordable layer for writing recorded marks in a recording area of the record carrier, which recording area extends over the track carrying the read-only marks, and which recordable layer is arranged to generate second variations of the radiation by a difference between an unrecorded state and a recorded state, the first and second variations being different for allowing detection of the read-only marks and the recorded marks from a same part of the track,

• the device comprising
• a head (22) for providing the beam, and
• recording means (22,27,28,29) for, while scanning the track containing the read-only marks, controlling an intensity of the beam for writing the recorded marks by modifying the recordable layer from the unrecorded state to the recorded state.

Device for reading information from a record carrier carrying information represented by read-only marks in a track, the read-only marks being optically readable according to a predefined high-density data format via a beam of radiation by first variations of the radiation, the record carrier comprising a recordable layer for writing recorded marks in a recording area of the record carrier, which recording area extends over the track carrying the read-only marks, and which recordable layer is arranged to generate second variations of the radiation by a difference between an unrecorded state and a recorded state, the first and second variations being different for allowing detection of the read-only marks and the recorded marks from a same part of the track,

• the device comprising
• a head (22) for providing the beam and generating a reading signal,
• reading means (32) for, while scanning the track containing the read-only marks, detecting the second variations for reading the recorded marks.

Method of recording information on a record carrier carrying information represented by read-only marks in a track, the read-only marks being optically readable according to a predefined high-density data format via a beam of radiation by first variations of the radiation, the record carrier comprising a recordable layer for writing recorded marks in a recording area of the record carrier, which recording area extends over the track carrying the read-only marks, and which recordable layer is arranged to generate second variations of the radiation by a difference between an unrecorded state and a recorded state, the first and second variations being different for allowing detection of the read-only marks and the recorded marks from a same part of the track, the method comprising scanning the track containing the read-only marks via a beam of radiation, and, while scanning the track, controlling an intensity of the beam for writing the recorded marks by modifying the recordable layer from the unrecorded state to the recorded state.