摘要 |
<p>A system for enhancing the value of broadcast signals (100) (e.g., broadcast radio signals) is disclosed. The system identifies the content of a broadcast signal (100) and provides services to receivers (102) of the broadcast signal (100) that relate to the broadcast signal (100) in some way. The services may provide information, entertainment, communication, and commercial opportunities. The disclosed system requires no modification to the broadcast network (101), broadcast content, or end-user devices (105).</p> |