Record carrier having a servo track with position information in accordance with a modulation type and permanent information in accordance with a different modulation type, and apparatus for scanning the record carrier

A record carrier comprising a servo track indicating an information track intended for recording information blocks represented by marks, said servo track having a periodic variation of a physical parameter at a predetermined frequency and modulated parts for encoding position information according to a predetermined type of modulation, characterized in that the record carrier further comprises a management area in which the servo track comprises permanent data represented by further variations of said physical parameter, the further variations being modulated in accordance with a type of modulation different from said predetermined type of modulation,

• wherein the management area has a track pitch between neighboring tracks larger than the track pitch in the area of the record carrier covered by the servo track indicating the information track intended for recording information blocks.

A recording and/or playback device comprising means for writing and/or reading information blocks in an information track on a record carrier having a servo track (4) indicating the information track (9), said recording and/or playback device comprises means for scanning the servo track, and demodulation means for retrieving position information from a signal generated by a variation of a physical parameter of the servo track at a predetermined frequency, said servo track having modulated parts for encoding position information according to a predetermined type of modulation, characterized in that the recording and/or playback device further comprises further demodulation means of a type different from said demodulation means for retrieving management data from a management area in which the servo track comprises the management data represented by further variations of said physical parameter, the further variations being modulated in accordance with the different type of modulation.

A method of manufacturing a record carrier, in which the record carrier is provided with a servo track indicating an information track intended for recording information blocks, said servo track being provided with a variation of a physical parameter at a predetermined frequency and modulated parts for encoding position information according to a predetermined type of modulation, characterized in that the record carrier comprises a management area in which the servo track comprises management data represented by further variations of said physical parameter, the further variations being modulated in accordance with a type of modulation different from said predetermined type of modulation.

A record carrier comprising a servo track which has a periodic variation of a physical parameter at a predetermined frequency and modulated parts for encoding position information according to a predetermined type of modulation, and wherein the record carrier comprises a management area in which the servo track comprises permanent data represented by further variations of said physical parameter, the further variations being according to a different type of modulation, the different type of modulation providing a higher data rate than the predetermined type of modulation.

A recording and/or playback device comprising means for writing and/or reading information on a record carrier that comprises a servo track, which device comprises means for scanning the servo track and demodulation means for retrieving position information from a signal generated by a variation of a physical parameter of the servo track at a predetermined frequency, which servo track has modulated parts for the encoding position information according to a predetermined type of modulation, and wherein the device comprises further demodulation means of a different type for retrieving management data from a management area in which the servo track comprises the management data represented by further variations of said physical parameter, the further variations being according to the different type of modulation, the different type of modulation providing a higher data rate than the predetermined type of modulation.

A method of manufacturing a record carrier, in which the record carrier is provided with a servo track provided with a variation of a physical parameter at a predetermined frequency and modulated parts for encoding position information according to a predetermined type of modulation, and wherein the record carrier comprises a management area in which the servo track comprises management data represented by further variations of said physical parameter, the further variations being according to a different type of modulation, the different type of modulation providing a higher data rate than the predetermined type of modulation.

A record carrier comprising:

• an information track for recording information blocks represented by marks,
• a servo track indicating the position of the information track and having a periodic variation of a physical parameter at a predetermined frequency and modulated parts encoded with position information according to a predetermined type of modulation,
• a management area in which the servo track comprises management data represented by further variations of said physical parameter, the further variations being modulated in accordance with a type of modulation different from said predetermined type of modulation, the management data being different than the position information.

A method of manufacturing a record carrier, comprising:

• providing an information track for recording information blocks represented by marks on the record carrier,
• providing a servo track on the record carrier, the servo track indicating the position of the information track and having a variation of a physical parameter at a predetermined frequency and modulated parts encoded with position information according to a predetermined type of modulation,
• providing a management area in which the servo track comprises management data represented by further variations of said physical parameter, the further variations being modulated in accordance with a type of modulation different from said predetermined type of modulation, the management data being different than the position information.