Disklike recording media, a method for detecting forged disks, an anti-forgery system for performing a true-false judgement based on information collected from the recording media, and a manufacturing apparatus for recording information in the disks
AssigneeVictor Company of Japan, Ltd.
InventorTetsuya Kondo
Life of this patent
Estimating the term…
Abstract
A recording medium includes first information selected from a plurality of information patterns and second information selected from another plurality of information patterns for the true-false judgement. A true-false judging device performs a statistic analysis when any coincidence is found between the readout combination of the first and second information and registered combination patterns, to identify an inspected recording medium as a forged product based on the result of the statistic analysis.
Claims15
A recording medium used for storing first information and second information, in which;
- said first information stored in said recording medium is selected from a first group of true-false judgement patterns prepared beforehand;
- said second information stored in said recording medium is selected from a second group of true-false judgement patterns prepared beforehand;
- said first information and said second information are independent from each other;
- and
- a combination of said first information and said second information is necessary for performing a true-false judgement to identify a forged product.
An apparatus for reading information recorded in a recording medium, comprising:
- first reading means for reading first information stored in said recording medium, said first information being selected from a first group of true-false judgement patterns prepared beforehand;
- and
- second reading means for reading second information stored in said recording medium, said second information being selected from a second group of true-false judgement patterns prepared beforehand,
- wherein said first information and said second information are independent from each other,
- a combination of said first information and said second information is necessary for performing a true-false judgement to identify a forged product, and
- said first reading means and said second reading means are an optical pickup reading device.
Dependencies are inferred from the claim text.