Optical recording method for data cards

Details Optical recording method for data cards Optical recording method for data cards

G - Physics

11

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352/32.1, 352/53

G11B 27/19 (2006.01) G06K 1/12 (2006.01) G06K 19/06 (2006.01) G11B 7/0033 (2006.01) G11B 7/0045 (2006.01) G11B 7/013 (2006.01) G11B 20/18 (2006.01) G11B 27/30 (2006.01) G11B 27/36 (2006.01)

Patent

CA 1298405

Abstract of the Disclosure A method of recording data on a card in which track indicia are laser recorded by a user on at least one end of a card prerecorded with tracks only. Track indicia include start and stop marks defining usable recordable areas, synchronization marks, error codes and track numbers and track termination codes. Start and stop marks may be a series of lines recorded in a pattern across the tracks and in addition to demarcating usable recordable areas of the card may indicate the location of track numbers and data areas as well as the particular encoding scheme used on the card. Data blocks may be written on entire tracks or in sectors. When recording error are detected, the data block is rewritten in a new sector or on another track using the same track number.

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