BROADCAST RECEIVING SYSTEM
The present invention provides a broadcast receiving system capable of receiving programs with a secondary viewing terminal device(s) even when a primary viewing terminal device is not turned on, and detecting a secondary viewing terminal device(s) used in an unauthorized manner. When device authentication between the secondary viewing terminal device and the primary viewing terminal device is established through a communication line, viewing is allowed for the secondary viewing terminal device. When the device authentication is not established, viewing is controlled for the secondary viewing terminal device based on viewing restriction information generated by the center device based on the power status of the primary viewing terminal device.
1 . A broadcast receiving system that is provided with one primary viewing terminal device and a predetermined number of secondary viewing terminal devices subordinate to said primary viewing terminal device, and that performs bidirectional communication between said primary viewing terminal device and a center device, and between said secondary viewing terminal device and said center device,
wherein said center device generates secondary viewing restriction information regarding the viewing control of said secondary viewing terminal devices based on at least the power status of said primary viewing terminal device, and
said secondary viewing terminal device comprises:
a viewing terminal device authentication means for authenticating that said secondary viewing terminal device is installed in the same house as said primary viewing terminal device;
a viewing restriction information acquisition means for acquiring said secondary viewing restriction information from said center device; and
a viewing control means for controlling the viewing of programs broadcast from said center device based on the result of the authentication performed by said viewing terminal device authentication means and said acquired secondary viewing restriction information.
2 . The broadcast receiving system in accordance with claim 1 , wherein said secondary viewing restriction information is generated so as to allow viewing for said secondary viewing terminal device within a scope in which no loss is caused to a service provider.
3 . The broadcast receiving system in accordance with claim 1 , wherein the authentication performed by said viewing terminal device authentication means uses a medium that is also used as a communication medium to receive broadcast waves.
4 . The broadcast receiving system in accordance with claim 1 , wherein when the authentication by said viewing terminal device authentication means is unsuccessful, said secondary viewing terminal device displays an indication that said primary viewing terminal device is not turned on.
5 . A broadcast receiving system that is provided with one primary viewing terminal device and a predetermined number of secondary viewing terminal devices subordinate to said primary viewing terminal device, and that performs bidirectional communication between said primary viewing terminal device and said secondary viewing terminal devices and a center device,
wherein said center device generates primary viewing restriction information regarding the viewing control of said primary viewing terminal device based on at least the power status of said primary viewing terminal device and a request from said secondary viewing terminal devices, and
said primary viewing terminal device comprises:
a viewing restriction information acquisition means for acquiring said primary viewing restriction information from said center device; and
a viewing control means for controlling the viewing of programs broadcast from said center device based on said primary viewing restriction information.