Patent ID: 6034930
Filing Date: 2000-03-07
Classification: A63F,G11B,H04N

Abstract:
An electronic device comprising:a medium mounting unit on which an information storage medium is to be detachably mounted, said information storage medium having a first region stored with information so as to be optically readable by the electronic device and a second region formed with an authentication indication so as to be visually recognizable to the human eye as the authentication indication as well as optically detectable by the electronic device to provide an authentication signal indicative of the authentication indication;an optical detection unit having an optical pickup which is arranged so as to optically detect said first region to retrieve said information and to optically detect said second region to provide the authentication signal indicative of the authentication indication;a storage unit which stores a reference signal corresponding to the authentication indication;a judging unit which compares a detected signal, which is generated by detecting said second region of said information storage medium by said optical pickup of said i detection unit, with said reference signal stored in said storing unit to judge whether or not said authentication indication is displayed in said second region of said information storage medium; anda control unit which is arranged so as to prevent said information from being executed or reproduced when the signal detected from said second does not agree with said reference signal.