TV-PROGRAM-RELATED INFORMATION DISPLAY SYSTEM, INTERTERMINAL EVENT SYNCHRONIZING APPARATUS, INTERTERMINAL EVENT SYNCHRONIZING METHOD, AND PROGRAM

PROBLEM TO BE SOLVED: To provide a TV-program-related information display system that, from Web sites on the Internet, collects and displays information linked to the content of a program to be viewed and listened to by an IPTV receiver.SOLUTION: A TV-program-related information display system includes: an IPTV distributing apparatus 1 that distributes a program via an IP communication network 6 in a multicast manner; an IPTV receiver 5 that receives the program via an HGW apparatus 4 installed at home and displays the program; a channel information acquiring unit 41 that generates a program detection message that is a combination of information on initiation, alteration, and termination of a multicast communication, an HGW identifier, an IP address of the IPTV receiver 5, and a multicast address; an interterminal event synchronization apparatus 2 that, on the basis of the program detection message, identifies a channel number of the program which is being viewed and listened to by the IPTV receiver 5, collects information related to the program which is being viewed and listened to from Web sites on the Internet, and generates a display message corresponding to the content of the program; and a message display apparatus 3 that, from the interterminal event synchronization apparatus 2, receives and displays the display message.