Research on the Implementation Method of AM Medium-Wave Emergency Broadcasting Based on DTMF Signaling Insertion

This paper introduces the generation principle of DTMF(Double Tone Multi Frequency) signaling at first, and describes the method that how DTMF signaling is inserted into the time slot of the audio signal which would be carried by AM medium-wave. An implementation scheme of AM medium-wave emergency broadcasting based on DTMF signaling insertion technology is proposed in this paper, meanwhile, the emergency broadcasting message receiving method and system structure based on DTMF signaling control are described in detail. It is provided that a feasible technology implementation scheme for popularization and application of medium-wave emergency broadcasting.