Multi-frequency point emergency broadcast realizing method

A technology of emergency broadcasting and implementation method, which is applied in multi-frequency point emergency broadcasting in counties, townships and villages, and in the city field, which can solve the problems of slow development process, mutual incompatibility, and same-frequency signal interference, so as to prevent interference , It has the effect of uniformity and convenient access to electricity

Inactive Publication Date: 2012-11-28
蒋能
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The broadcasting system is a very simple and stable signal transmission system. However, in recent years, the broadcasting signal transmission technology is changing with each passing day, and the process of formulating national standards and industry standards is slow. Due to the lack of rules to follow, the equipment technical solutions of various manufacturers are

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for implementing multi-frequency point emergency broadcasting, comprising the following sequential steps:

[0019] 1) Assign an independent address to each receiving terminal, and the broadcast front-end realizes point-to-point or point-to-point broadcast signal transmission to the receiving terminal through coding control;

[0020] 2) The receiving terminal automatically recognizes and broadcasts according to the preset priority order. The method is as follows: each receiving terminal is equipped with two receiving modules, one is a search module and the other is a broadcast module. The receiving terminal presets several receiving frequency points F1, F2, ..., Fn, n is less than 10, the CPU continuously searches the preset frequency points for the search module according to the preset time interval, after searching for the signal, the CPU controls the broadcast module, and controls the broadcast according to the preset priority order The module broadcasts. Dur...

Embodiment 2

[0026] A method for implementing multi-frequency point emergency broadcasting, comprising the following sequential steps:

[0027] 1) Set the city-level signal frequency as F1, the county-level signal frequency as F2, the township-level signal frequency as F3, and the village-level signal frequency as F4, set the priority F1>F2>F3>F4, and the terminal receiver and expander Continuously search the signals of each frequency according to the preset time interval, and broadcast according to the priority;

[0028] 2) The terminal receiver and expander receives digital signals, searches for emergency signal commands at each frequency, and the terminal receiver and expander switches to the emergency frequency to broadcast emergency broadcasts.

[0029] The terminal receiver in step 1 is a 20 / 25*2W outdoor receiver, and each outdoor receiver has two outputs, and the two outputs are respectively connected to a 20 / 25W sound column.

[0030] The emergency signal transmission in step 2 a...

Embodiment 3

[0033] The entire multi-frequency point emergency broadcast transmission method and equipment are as follows:

[0034] The front end is divided into county front end, town front end and village front end. All front-ends need to be equipped with audio source equipment (DVD, radio head, microphone), intelligent data FM modulator (including encoding controller, modulator, demodulator, telephone inserter) and monitor speakers, etc. County front-end and town front-end also need Equipped with network management host, audio workstation, power controller, UPS, mixer, cabinets (county front-end triple, township second, village first), etc.

[0035] Intelligent data broadcast is to assign and set an independent address to each receiving terminal, and the broadcast front end can realize point-to-point or point-to-face broadcast to the terminal. Coding control adopts digital coding technology, and the control command and address code are transmitted by 57 / 67 K subcarrier code, which can ...

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PUM

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Abstract

The invention provides a multi-frequency point emergency broadcast realizing method, comprising the steps in sequence as follows: 1, a receiving terminal is provided with a plurality of receiving frequency points in advance, and controls a broadcast module to broadcast according to a pre-set prior sequence; and a broadcast front terminal can realize point-to-point or point-to-face broadcast to each terminal with an assigned and set individual address, so that the interference caused by system external strong common-frequency signals can be effectively prevented; and system encoding has uniformity and security; and 2, a terminal receiving and expanding machine receives digital signals and searches an emergency signal instruction under each frequency, so that the terminal receiving and expanding machine is converted into an emergency frequency to broadcast emergency broadcast. The multi-frequency point emergency broadcast realizing method provided by the invention has the beneficial effects in that the broadcast front end can realize the point-to-point or point-to-face broadcast to the terminal, so that the interference of strong common-frequency signals outsides the system can be effectively prevented, and the system encoding has the uniformity and the security; and RDS (Radio Data System) signal transmission uses a PSK (Phase Shift Keying) modulation manner, so that the signal transmission stability is high, and the transmission rate is high.

Description

technical field [0001] The invention relates to a method for realizing multi-frequency point emergency broadcasting, in particular to a method for realizing multi-frequency point emergency broadcasting for broadcasting in cities, counties, townships and villages. Background technique [0002] The broadcasting system is a very simple and stable signal transmission system. However, in recent years, the broadcasting signal transmission technology is changing with each passing day, and the process of formulating national standards and industry standards is slow. Due to the lack of rules to follow, the equipment technical solutions of various manufacturers are different and incompatible with each other. It has brought a lot of inconvenience to our scheme formulation and equipment selection. It is necessary to send signals to each receiving terminal, and the signal transmission is likely to cause interference of the same-frequency signal, and there are certain hidden dangers in th...

Claims

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Application Information

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IPC IPC(8): H04H20/59H04H20/33
Inventor 蒋能
Owner 蒋能
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