A method for sending and receiving emergency broadcast signaling

Abstract

The invention discloses a method for transmitting and receiving an emergency broadcast signal. The method for transmitting the emergency broadcast signal comprises the following steps that when the emergency broadcast signal needs to be transmitted, the emergency broadcast signal is inserted into a normal broadcast program audio signal, the broadcasting time is the duration of the signal, and then the normal broadcast program audio signal is broadcasted. The method for receiving the emergency broadcast signal comprises the following steps that a radio module demodulates mixed audio signals comprising emergency broadcast signals according to a medium wave demodulation mode and a short wave demodulation mode or a frequency modulation demodulation mode, and the mixed audio signals are transmitted to a receiving device; the receiving device demodulates the corresponding emergency broadcast signal from the emergency broadcast signals, and a power amplifier and loudspeaker module and the radio module are controlled according to an emergency broadcast instruction. According to the method for transmitting and receiving the emergency broadcast signal, the emergency broadcast signal is inserted into the analog audio baseband signal. The method for transmitting and receiving the emergency broadcast signal can be widely applied to the medium wave broadcast, the short wave broadcast, the frequency modulation broadcast and the like, and is high in noise immunity, low in reception bit error ration and capable of greatly improving the operation efficiency.

Description

technical field [0001] The invention relates to the technical field of broadcast communication, in particular to a method for sending and receiving emergency broadcast signaling. Background technique [0002] "Emergency broadcast" refers to the use of radio and television systems to notify the public of emergency information when facing public emergencies. Dissemination of emergency information to the public based on the radio and television system is an effective means for rapid and extensive early warning, timely notification of disaster situations, and assistance in disaster prevention and relief. At present, my country has built the largest population in the world, the combination of the central and local governments, the use of various means such as cable, wireless, satellite, and the Internet, and the common development of traditional media and emerging media, covering the whole country, urban and rural areas, and reaching thousands of households. broadcast network. A...

AI Technical Summary

Problems solved by technology

Using DTMF as the modulation method of emergency broadcast signaling, the transmission rate is far from meeting the requirements

[0005] There are also additional channels (RDS, Radio Data System) or SCA (Subsidiary Communications Authorization) of FM broadcasts to transmit emergency broadcast signaling. The disadvantages of these two methods are that they need to occupy additional channels and increase transmission equipment. ; and only through FM broadcasting, not applicable to medium wave and short wave broadcasting

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