| 摘要 |
PROBLEM TO BE SOLVED: To display a channel number under a flat contract. SOLUTION: When a security module 9 receives a command of an output of a channel number in flat contract at present from a decoder 8, it is read by an EEPROM 24 and fed to the decoder 8. The decoder 8 outputs a display signal corresponding to a channel number from the EEPROM 24. A tuner 20 selects a prescribed channel from a received signal and a 1st decoder 23 decodes individual information by an individual key and provides an output of the contract key. A 2nd decoder 22 decodes program information based on the contract key and provides an output of the scramble key. A descrambler 21 descrambles a video and audio signal based on the scramble key.
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