Control method for marking label side of optical disc
AssigneeLite-On It Corporation
InventorsChih-Wei Huang, Tao-Yen Wei, Yi-Shih Wang
Life of this patent
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Abstract
An inner ring signal and an outer ring signal according to specific patterns formed on the label side of the optical disc are generated. Timing starts when the outer ring signal reveals the end of a positioning pattern and stops to obtain a timing value when the inner ring signal reveals the start of a square wave defining a specified spoke. A starting spoke is defined according to the inner ring signal and the specified spoke. A deviation bit value is calculated according to the timing value and a bit number of a data to be marked on a certain track of the optical disc. The data is rotated according to the deviation bit value, and then marked on the certain track, starting with the starting spoke.
Claims8
A control method for marking a label side of an optical disc, comprising steps of:
- generating an inner ring signal and an outer ring signal according to specific patterns formed on the label side of the optical disc, wherein the specified patterns include a positioning pattern in an outer ring and a plurality of spokes in an inner ring;
- starting timing when the outer ring signal reveals the end of the positioning pattern;
- stopping timing and obtaining a timing value when the inner ring signal reveals the start of a square wave defining a specified spoke;
- defining a starting spoke according to the inner ring signal and the specified spoke;
- calculating a deviation bit value according to the timing value and a bit number of a data to be marked on a certain track of the optical disc;
- and
- rotating the data according to the deviation bit value, and marking the rotated data on the certain track, starting with the starting spoke.
Dependencies are inferred from the claim text.