| 摘要 |
PROBLEM TO BE SOLVED: To connect AV equipment in a prescribed form by judging the ID of various AV equipment or the state of a system connected by AV signal radio transmitter and receiver. SOLUTION: When preventing the illegal copy of AV signals to an external storage device, etc., for example, download information or IC card information from a center is stored at a communication terminal 1a of AV equipment on the side of transmission and corresponding to this information, a protect signal for preventing the illegal AV signal copy is transmitted from the terminal 1a to an AV signal radio transmitter 10a. As a result, the AV signal is outputted from an AV signal radio receiver 20a connected to a TV 2a having no signal recording function but no AV signal is outputted from a receiver 20b connected to a VTR 2b having the signal recording function and the illegal copy can be prevented. Thus, since the selection information of the desired connection form is integrated beforehand, base on the information concerning the ID From various AV equipment to be connected or the state of the system, the AV equipment can be connected in the prescribed form. |
