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
View Patent ↗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.
1. 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,
wherein said recording medium is a disklike recording medium comprising:
a first substrate having a thickness of 0.6 mm and having a recording layer;
a second substrate having a thickness of 0.6 mm; and
an adhesive layer intervening between said first substrate and said second substrate.
2. The recording medium in accordance with claim 1 , wherein said recording medium is a DVD (i.e. a digital video disk or a digital versatile disk) of 4.7 GB.
3. The recording medium in accordance with claim 1 , wherein said recording medium is a phase-change type disk.
4. The recording medium in accordance with claim 1 , wherein said first information is recorded in a lead-in area of said recording medium.
5. The recording medium in accordance with claim 1 , wherein said second information is recorded as a bar code.
6. A playback apparatus for an information recording medium which stores first information and second information, in which:
said first information is selected from a first group of true-false judgement patterns prepared beforehand and is recorded data stored in a lead-in area of said information recording medium;
said second information is selected from a second group of true-false judgement patterns prepared beforehand and is a bar code provided on said information recording medium;
said first information and said second information are independent from each other and prepared as a combination for performing a true-false judgement to identify a forged product;
a first reading means for reading said first information from said lead-in area of said information recording medium; and
a second reading means for reading said second information from said bar code of said information recording medium.
7. A playback method for an information recording medium, comprising the steps of:
reading information stored in a predetermined area of said information recording medium by using an optical pickup device;
establishing a communication line via an internet to an external system;
and
transmitting readout information to said external system.
8. The information recording medium playback method in accordance with claim 7 , wherein
in the step of transmitting said readout information to said external system, at least one of name, address, telephone number and network ID of a customer having purchased said information storing medium is transmitted.