INFORMATION DISPLAY DEVICE, SYSTEM, METHOD AND PROGRAM

PROBLEM TO BE SOLVED: To display a variety of information on a terminal such as a smartphone, without applying any load on a server, or to perform a variety of processing.SOLUTION: A terminal receives a broadcast voice with a watermark from a receiver/recorder and reproducer (S201). The terminal detects watermarked data from the broadcast voice, and stores a content ID and the broadcast time and the detection time of the broadcast voice, included in the watermarked data, on a watermarked data table in the terminal (S203). The terminal acquires additional information (positional information and/or registration information, etc.) from an additional information unit (S213). The terminal refers to the watermarked data table, and when the difference of the detection time and the broadcast time is equal to a predetermined value (S205), displays the page of reference data (URL or command) specified corresponding to the content ID or additional information on a link table, or performs processing specified by the reference data (S207, S209).