Emergency broadcast message sending device based on frequency modulation broadcasting

Abstract

The invention discloses an emergency broadcast message sending device based on frequency modulation broadcasting. Adaptive encapsulation equipment extracts additional information and an emergency digital broadcast program from an emergency broadcast message; playing interpolation equipment is used for performing digital to analog conversion on the emergency digital broadcast program to obtain an emergency simulation broadcast program and transmitting the emergency simulation broadcast program to a first input port of audio switching equipment as well as transmitting the additional information to frequency modulation transmission equipment; the audio switching equipment outputs the emergency simulation broadcast program input from the first input port to the frequency modulation transmission equipment; and the frequency modulation transmission equipment modulates the emergency simulation broadcast program and the additional information and transmits the emergency simulation broadcast program and the additional information. The emergency broadcast message sending device interpolates the emergency broadcast message to be transmitted into a frequency modulation broadcast signal, so that the emergency broadcast message can be effectively sent on the premise that normal playing of the conventional frequency modulation broadcast program is not influenced. By the emergency broadcast message sending device, the emergency broadcast message can be sent at a plurality of frequency points, and publishing requirements of different geographical environment regions can be met.

Description

technical field [0001] The invention relates to the technical fields of communication and broadcasting, in particular to an emergency broadcast message sending device based on frequency modulation broadcasting. Background technique [0002] In the 21st century, there have been a series of major disasters and crises around the world, such as the "9.11" incident, bird flu epidemic, Indian Ocean earthquake and tsunami, Haiti earthquake, etc. In recent years, "SARS", rain and snow have also occurred in my country. Severe natural disasters such as freezing and the Wenchuan earthquake have caused huge economic losses to the country and seriously affected the lives of the people. When a country or region encounters a public emergency that causes or may cause heavy casualties, property damage, ecological environment damage, and serious social hazards, the authorized person of the government or region can notify the public of the emergency and response measures through the emergency b...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing radio and television transmission network, only mobile multimedia broadcasting can adapt, encapsulate and insert emergency broadcast messages into the broadcast signal. There is currently no good solution for broadcasting emergency broadcast messages for FM broadcast transmission networks.

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