| 摘要 |
A RECORDING-MEDIUM ID INFORMATION, WHICH IS CONDITION INFORMATION READ FROM THE RECORDING MEDIUM LOADED INTO A RECORDING AND REPRODUCTION APPARATUS (1), IS COMPARED WITH THE ID INFORMATION UNIQUE TO THE APPARATUS. WHEN THEY HAVE THE CORRECT RELATIONSHIP, A RECORDING OR REPRODUCTION OPERATION IS PERMITTED FOR THE RECORDING MEDIUM. AS ANOTHER CONDITION INFORMATION, AN ID TO BE INPUT IS ADDITIONALLY SPECIFIED. WHEN THE CORRECT ID IS INPUT, A RECORDING OR REPRODUCTION OPERATION TO THE RECORDING MEDIUM IS ALLOWED. THUS, A MULTIPLE-LEVEL PROTECTION FUNCTION IS ACHIEVED.
|
