| 摘要 |
The present invention relates to a system and method for interactive cable broadcast. The system according to the present invention comprises: a headend for broadcast for outputting a downlink RF broadcast signal into an electrical signal; an optical transmitter for converting the downlink RF broadcast signal into an optical signal; an optical network unit for receiving the downlink RF broadcast signal, which is converted into the optical signal and transmitted through an optical cable network, converting the downlink RF broadcast signal into an electrical signal, and transmitting the electrical signal to a set-top box through a coaxial cable; the set-top box for processing the downlink RF broadcast signal transmitted from the optical network unit to output the processed signal to a video reproduction unit and outputting an interactive broadcast service request message requested from a user into an uplink Internet signal through an Ethernet port; and an interactive service unit for providing an interactive broadcast service corresponding to the interactive broadcast service request message. According to the present invention, the burden of dual investment and management for the broadcast network and the communication network can be reduced. More particularly, it is not required to mount a cable model on the set-top box and construct, at the headend, CTMS equipment for transmitting and receiving data with the cable modem. In addition, it is possible to provide an interactive cable broadcast service without including, in the system, a high-priced RFoG uplink optical transmission module for converting an uplink RF broadcast signal into an optical signal and transmitting the optical signal in an uplink direction. [Reference numerals] (10) Optical cable network;(110) Headend for broadcast;(120) Interactive service unit;(170) Set-top box |
