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US 6,208,600 B1Granted
Method and device for recording data in an optical memory card
AssigneeKabushiki Kaisha Nippon Conlux
InventorsYasuyuki Kimura, Akira Onodera
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AssigneeKabushiki Kaisha Nippon Conlux
InventorsYasuyuki Kimura, Akira Onodera
Estimating the term…
A method and a device for recording data in an optical memory card which facilitate judgment between an unrecorded region and a recorded region in the optical memory card and which prevent double writing. Record pits are formed so that data to be recorded on the optical memory card is recorded in the same way as when recorded in the MFM-RZ modulation system. Data that was recorded in the NRZI-RZ modulation system is reproduced and the modified to record in the MFM-RZ modulation system. This method forms the record pits at least every two recording intervals or less in the recorded region in the optical memory card, making it possible to judge the unrecorded region of the optical memory card from the recorded region according to presence or absence of the record pits and thereby preventing double writing.
A method of recording data in an optical memory card, in which data is discontinuously recorded, by forming no more than one pit in each sector of the optical memory card, the method comprising the steps of:
A method of recording data in an optical memory card, in which data is discontinuously recorded, by forming a plurality of pits in each sector of the optical memory card, the method comprising:
A device for recording data in an optical memory card, in which data is discontinuously recorded, by forming no more than one pit in each sector of the optical memory card, the device comprising:
A device for recording data in an optical memory card, in which data is discontinuously recorded, by forming a plurality of pits in each sector of the optical memory card, the method comprising:
Dependencies are inferred from the claim text.