Abstract: Radio broadcasting equipment is provided that enables targeted radio broadcast advertisement delivery in a radio broadcast area wherein localized auxiliary content may be transmitted to a user device prior to or during transmission of broadcasted audio streams and output to the user via the user device at a prescribed point in time that is triggered based on an inaudible tone included in the broadcasted audio stream. Selection of the auxiliary content may be based on location information determined by the user device and/or preference information input by the user.

Abstract: Radio broadcasting equipment is provided that enables targeted radio broadcast advertisement delivery in an radio broadcast area wherein a plurality of radio auxiliary or booster transmitters are used to transmit localized auxiliary information to supplement broadcast area wide content transmitted on the same frequency. Moreover, these auxiliary or booster transmitters are configured to transmit different localized auxiliary information to supplement a plurality of main transmitters transmitted on corresponding specified transmission frequencies using Time Division Multiple Access frame structure.

Abstract: Radio broadcasting equipment is provided that enables targeted radio broadcast advertisement delivery in an radio broadcast area wherein a plurality of radio transmitters are used to transmit broadcasting area wide programming and localized auxiliary information on a single frequency and wherein broadcasting area wide programming is transmitted by at least one of the radio transmitters and localized auxiliary information is transmitted by individual radio transmitters included in the plurality of transmitters.