INFORMATION DISPLAY DEVICE, SYSTEM, METHOD AND PROGRAM

PROBLEM TO BE SOLVED: To display various kinds of information to a terminal such as a smart phone without applying a load to a server, or execute various kinds of processing.SOLUTION: A terminal receives watermarked broadcast speech from a receiver/recording reproducer (S201). The terminal detects watermarked data from the broadcast speech, and stores a content ID included in the watermarked data, broadcast time and detection time of the broadcast speech into a watermarked data table in the terminal (S203). When the terminal refers to the watermarked data table, and the difference between the detection time and the broadcast time is a predetermined value (S205), the terminal displays a page of reference data (a URL or a command) corresponding to the content ID at a link table and designed, or executes specified processing by the reference data (S207, S209).