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专利名称：System for storing and reproducing
information from a disc shaped informationcarrier
发明人：Johannus L. Bakx申请号：US08/629303申请日：19960408公开号：US05844865A公开日：19981201
摘要：The disclosed system includes a disc-shaped information carrier and an
apparatus for reading and writing information blocks in a continuous track. For indicatingthe track, the information carrier has a servotrack in which a winding number is encodedper track winding. A winding number and an angular position can be determined from theaddress of an information block. The angular position is given relative to a referenceangular position. This reference angular position is determined by one or more referencemarks which are written on the information carrier prior to the first information block.The actual angular position is determined by counting the time relative to a knownrotation time from the reading of a reference mark onwards. One or more pulses, forexample tachopulses, are generated per revolution in the apparatus. The location of thereference angular position is determined relative to the pulses by reading a referencemark and, subsequently, the actual angular position can be derived from the pulses.
申请人：U.S. PHILIPS CORPORATION
代理人：Edward Blocker
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