SATELLITE COMMUNICATION SYSTEM

摘要

PURPOSE:To provide a stellite communication system capable of surely performing authorization on all receiving stations. CONSTITUTION:The system consists of a transmitting station equipped with a video/data information transmission section 400 ciphering video or data information and converting it into the 1st frequency to output and a key information transmission section 500 adding the prescribed information to the key information to decode a cipher periodically and converting it into the 2nd frequency different from the 1st frequency to output and plural receiving stations equipped with a video/data information receiving section 900 accepting the output of the transmitting station through the satellite and acquiring video or data information by releasing the ciphering processing by the key information and a key information receiving section 160 outputting key information by automatically turning on the power source of the circuit to take out the key information when receiving the 2nd frequency information.