Information recording method for recording multi-value data in optimum recording condition
AssigneeRicoh Company, Ltd.
InventorKohji Takeuchi
Life of this patent
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Abstract
An information recording method that obtains optimum recording conditions for recording multi-value data m on a recording medium includes recording a test pattern in a trial writing area of the recording medium by changing a recording power Pw and an erasing power Pe consecutively while maintaining a constant ratio between the recording power Pw and the erasing power Pe, and selecting the recording power Pw and the erasing power Pe producing reproduced results in which a reproduced signal level is substantially linear with respect to the multi-value data m, as an optimum recording power and an optimum erasing power, respectively.
Claims2
An information recording method that obtains optimum recording conditions for recording multi-value data on a recording medium, comprising:
- recording a plurality of test patterns in a trial writing area of the recording medium, wherein, between recording of consecutive test patterns, a recording power Pw and an erasing power Pe are changed while maintaining a constant ratio between the recording power Pw and the erasing power Pe;
- and
- selecting an optimum recording power and an optimum erasing power as the recording power Pw and the erasing power Pe, respectively, that produce reproduced results in which a reproduced signal level is substantially linear with respect to the multi-value data,
- wherein each test pattern includes M2 combinations of multi-value data patterns, each combination having front-back symmetry, for M-value recording of the multi-value data on the recording medium.
Dependencies are inferred from the claim text.