Five Mainstream Solutions of Emergency Broadcasting System

"This guideline deeply analyzes the problems brought by the emergency broadcasting system in detail, and introduces five mainstream RDS solutions of the emergency broadcast system and their advantages and disadvantages, it's useful for people who needs RDS ----- FMUSER"

#Based on the RDS coding technology, the system uses the RDS encoding and decoding function of the broadcast control host in the background of the system to encode and decode the broadcast signal, and then transmits the radio frequency modulation signal through the coaxial cable or wireless transmitting station.


At present, there are five mainstream solutions for emergency broadcasting system.

Content

1. RDS scheme based on traditional cable FM broadcasting system

2. All IP scheme based on Internet

3. TS stream broadcasting scheme based on DTV system

4. A hybrid scheme of IP broadcasting + RDS FM broadcasting

5. The hybrid scheme of TS streaming digital broadcasting + RDS FM broadcasting

1) RDS scheme based on traditional cable FM broadcasting system
Based on the RDS coding technology, the system uses the RDS encoding and decoding function of the broadcast control host in the background of the system to encode and decode the broadcast signal, and then transmits the radio frequency modulation signal through the coaxial cable or wireless transmitting station.

Good RDS encoder such as FMUSER RDS-B Encoder is well suited for most regional, local, RSL, LPFM and other medium- and small-coverage radio stations which use Ethernet for dynamic RDS data distribution. Built-in Ethernet Controller supports multiple TCP/UDP ports, Internet Functions and Remote Monitoring.

FMUSER RDS-B Encoder have Fully DSP concept and effective design ensures HIGH RELIABILITY, EXCELLENT SIGNAL characteristics and will bring you with many advanced features while maintaining LOW acquisition COSTS.

>>FMUSER RDS Digital Encoder

SN	Advantages	Disadvantages
①	The broadcasting system based on FM signal technology has high transmission quality, small distortion, high reliability and low construction and operation cost, which is an ideal way to transmit FM signal	In the process of network management monitoring or terminal status monitoring, it is necessary to plan other network channels to achieve return transmission, which brings inconvenience to the construction
②	In the areas where the wired network is accessible, the wired FM subcarrier can be used while in some areas where the wired network has not yet reached	Under the existing technical conditions, the number of corresponding modulation devices needs to be increased
③	The wireless FM subcarrier can be used to supplement the implementation of emergency broadcasting technology in remote areas	Cost might be increased when implementing multi-channel concurrency at county and township level

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2) All IP scheme based on Internet
The system is based on TCP / UDP technology and transmits audio signal in LAN or WAN in the form of IP packets. The core platform of the system is deployed in the county computer room. The county or township can broadcast or shout through the IP network through the sub control computer.

>>FMUSER TCP / UDP Supported RDS 1KW Package 

SN	Advantages	Disadvantages
①	The use of wired network IP technology to achieve emergency broadcasting, with safe, reliable, two-way transmission, manageable and controllable, smooth communication characteristics.	This technology has higher requirements for the cable broadband network or cable TV bidirectional transformation
②	Moreover, the software can realize remote operation, online upgrade and control, and the capacity can be continuously expanded according to the needs. It can transmit high fidelity audio quality to meet any broadcast needs.	It can not be used in areas where the cable broadband network is not accessible or the cable TV is not IP transformed.
③	It can transmit high fidelity audio quality to meet any broadcast needs. The multi-channel concurrent function can be easily realized by using the characteristics of IP network. The wired network IP channel with two-way capability also provides convenient conditions for daily network management and emergency drills.

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3) TS stream broadcasting scheme based on DTV system

The system is based on TS stream signal transmission. Under the coordination of broadcasting system management platform, daily broadcast message instructions can be formed on demand according to the determined packaging protocol and data format, and sent to the front-end of digital TV according to the needs. The signals are combined by multiplexers and sent to QAM modulator for modulation. According to the different transmission lines, the system can be divided into two types Formula:

● Cable digital TV: DVB-C system is adopted and coaxial cable is used for transmission.

● Wireless terrestrial digital TV: DTMB system is adopted, and wireless signal is transmitted by wireless terrestrial digital TV transmitter.

SN	Advantages	Disadvantages
①	it can be transmitted by digital signal with high quality and small distortion.	This technology is limited by the current access of cable / terrestrial digital television network below the county level, and the deployment of TS stream adaptation, multiplexing, scrambling and other equipment of the platform below the county level.
②	It can transmit various forms of emergency broadcasting, such as audio, video and text, to meet the needs of the development of emergency broadcasting in the future.	It can not realize local insertion in the platform without TS adaptation, multiplexing and other functions (such as towns and administrative villages), and it does not have the ability to independently carry out emergency broadcasting without the superior.
③	It meet the needs of the development of emergency broadcasting in the future.	It is necessary to plan the emergency broadcast frequency points separately or occupy the existing radio and television channels to complete the transmission of emergency broadcast programs

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4) A hybrid scheme of IP broadcasting + RDS FM broadcasting

The system uses the existing network resources to transmit the broadcast signal to the administrative village in the form of IP data packet, and then converts the IP signal into RDS signal by using the RDS encoding and decoding function of the broadcast control host, modulates and amplifies the IP signal through the FM transmitter, and sends it to each broadcast point in the way of wireless FM, so as to solve the problem of coverage of the last kilometer of broadcast.

SN	Advantages	disadvantages
①	It makes full use of the existing network resources, networking is more flexible, and solve the problem of signal coverage in the last kilometer.	This technology has higher requirements for the cable broadband network or cable TV bidirectional transformation
②	Wireless signal mode is adopted at the end of the system to solve the problems such as complex terrain and difficult construction wiring.	It can not be used in areas where the cable broadband network is not accessible or the cable TV is not IP transformed.

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5) The hybrid scheme of TS streaming digital broadcasting + RDS FM broadcasting is integrated

The system uses the existing TS network line to transmit the broadcast signal in the form of TS stream to the administrative village, and then uses the encoding and decoding function of TS stream adapter to convert the TS signal into analog audio signal. 

Through the RDS coding function of the broadcast control host and the modulation and amplification function of the FM transmitter, the system sends the broadcast signal to each broadcast point in the form of wireless FM, so as to solve the problem of coverage of the last kilometer of the broadcast Question.

SN	Advantages	Disadvantages
①	The advantages of this technology lie in the flexible networking mode, fully considering the network coverage of the region, and adopting digital signal transmission at the administrative village level,	It is limited by the current access of cable / terrestrial digital television network below the county level, and the deployment of TS stream adaptation, multiplexing, scrambling and other equipment of the platform below the county level.
②	It has high quality and small distortion, and can transmit various forms of emergency broadcasting, such as audio, video and text which meet the needs of the development of emergency broadcasting village in the future.	It can not realize local insertion in the platform without TS adaptation, multiplexing and other functions (such as towns and administrative villages), and it does not have the ability to independently carry out emergency broadcasting without the superior.
③	FM signal is used at the end of the system to solve the last kilometer coverage of the signal.	it is necessary to plan the emergency broadcast frequency points separately or occupy the existing radio and television channels to complete the transmission of emergency broadcast programs.

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