Disc-like record carrier with information track containing control information including disc diameter
AssigneeU.S. Philips Corporation
InventorJohannes J. Mons
Life of this patent
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Abstract
A disc-like record carrier (1) is disclosed on which control information is recorded. The control information comprises diameter information which is indicative of the diameter of the record carrier. An information recording and/or reading apparatus comprises a drive means (2) for rotatingly driving the disc-like record carrier (1). The apparatus comprises a control unit (5) which adapts the loop gain of a control loop (2, 3, 7, 8, 9) for controlling the number of revolutions per minute of the record carrier (1) in dependence on the control information recorded on the record carrier.
Claims4
Disc-like record carrier having a predefined diameter on which record carrier control information is recorded, characterized in that the control information comprises diameter information which is indicative of the diameter.
Information recording and/or reading apparatus comprising a drive means for rotatingly driving a disc-like record carrier, and setting means for setting the apparatus in dependence on control information accommodated on the record carrier, and which apparatus comprises components whose behaviour depends on the diameter of the record carrier, characterized in that the setting means comprise means for adapting the diameter-dependent behaviour of said components in dependence on the control information.
Dependencies are inferred from the claim text.