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.
Claims20
A recording medium storing ordinary information which is irrelevant to a true-false judgement performed for identifying a forged product, comprising;
- first information selected from a first group of true-false judgement patterns and stored in said recording medium;
- and
- second information selected from a second group of true-false judgement patterns and stored in said recording medium,
- wherein said first information and said second information are prepared beforehand and used as a pair or combination when performing a true-false judgement to identify a forged product, and
- said ordinary information and said first information are recorded on the same recording surface of said recording medium.
An apparatus for detecting forged products of recording media, said apparatus comprising:
- memory means for storing a plurality of true combination patterns which are predetermined beforehand for a true-false judgement performed for identifying a forged product;
- receiving means for receiving a combination of first and second information read out from an inspected recording medium, said first information being selected from a first group of true-false judgement patterns prepared beforehand, and said second information being selected from a second group of true-false judgement patterns prepared beforehand;
- and
- true-false judging means for identifying said inspected recording medium as a forged product when no coincidence is found between the combination of said first and second information received by said receiving means and said true combination patterns stored in said memory means.
An apparatus for detecting forged products of recording media, said apparatus comprising:
- reading means for reading first information and second information from an inspected recording medium, said first and second information being discriminable from ordinary information which is irrelevant to a true-false judgement performed for identifying a forged product, said first information being selected from a first group of true-false judgement patterns prepared beforehand, and said second information being selected from a second group of true-false judgement patterns prepared beforehand;
- transmitting means for transmitting a readout of a combination of said first and second information to a true-false judging apparatus which identifies a forged product;
- and
- receiving means for receiving an operational instruction based on a true-false judgement result from said true-false judging apparatus.
Dependencies are inferred from the claim text.