KR100365907B1 - System for transmitting and receiving of an additional information using a FM additional broadcasting - Google Patents

Abstract

The present invention is an information transmission and reception system using FM additional broadcasting.

In order to display information to a terminal of a mobile or fixed information display system in the form of an electronic signboard implemented in the present invention, the FM additional broadcast transmission unit adds additional information including news, stocks, weather, traffic, and sports information to a general FM radio broadcast signal. In addition to real-time addition and RF transmission, the FM additional broadcast receiver receives the RF transmission signal to separate additional information and displays at least one of the separated additional information and its own information. At this time, the technology of adding additional information to the FM radio broadcast signal processes the information to be transmitted based on the FM DARC or FM RDS transmission protocol.

As a result, it is easy to build a mobile display or fixed information display system in the form of a display board using the FM additional broadcasting anywhere in the broadcast receiving area, and it is possible to express differentiated contents according to the function of the display board. In addition, since information is supplied through broadcasting, it is possible to maintain the breaking news and reliability of the displayed information.

Description

System for transmitting and receiving using FM additional broadcasting {System for transmitting and receiving of an additional information using a FM additional broadcasting}

The present invention relates to an information transmission and reception system using FM additional broadcasting, and more particularly, to a mobile or fixed information display system in the form of an electronic signboard for transmitting, receiving and displaying additional information using FM additional broadcasting.

In general, electronic signboards are used to get information and advertisements to unspecified people in busy cities, terminals, railways and expressways.

The display media for the information delivery and advertisement effect are displayed by receiving information through an independent or locally configured network, but in a domestic reality where the information provision base is relatively poor compared to foreign countries, a reliable information provider is provided. There is a lot of difficulty in the quick acquisition of the latest information from.

In particular, in the case of a mobile display system installed in public transportation such as a railroad or a bus, information input methods are limited from the outside, and recently, attempts to receive information through a public wireless network have been made. There is a high cost of maintaining and operating a system for obtaining information.

With this in mind, by providing multiplexing and transmitting various additional information to the broadcast radio signal, the user is provided with additional information at a lower cost and in an easier way.

In general, the FM additional broadcasting system transmits a radio digital signal to a listener by adding a radio digital system signal (hereinafter referred to as RDS) or a data radio channel (DARC) signal. It is a broadcasting system for providing a variety of information in addition to listening to the radio.

The waveform diagram of the FM additional broadcast signal is described below.

FIG. 1 is a waveform of an FM baseband, in which an RDS signal and a DARC signal are loaded to be applied to information transmission of an FM additional broadcasting system in addition to an audio signal (L + R, LR) and a pilot signal (pilot). to be.

In this case, the RDS signal is a modulated data signal of 1,187.5bps using DBPSK method. The subcarrier frequency is 57 kHz, the subcarrier level is 1.3 to 10%, and the (26, 16) shortened cyclic code is used for error correction during data transmission. use.

In addition, the DARC signal modulates a 16Kbps digital signal according to the level of the difference (LR) signal between the L-channel audio signal and the R-channel audio signal, thereby modulating minimum shift keying (MSK) and a band pass filter (BPF). The subcarrier is 76 kHz, the level of the subcarrier is 4 to 10% according to the LR signal level, and (272, 190) short-circuit codes are used for error correction during data transmission and reception.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide fast and reliable information at a low cost regardless of a place by using an FM additional broadcast that multiplexes additional information in a general FM broadcasting audio signal. It is to provide a fixed information display system in the form of a signboard that can be displayed on the display system.

It is another object of the present invention to use an FM additional broadcasting multiplexed with additional information in a general FM broadcasting audio signal, an electronic display type mobile display that can display information on a mobile display system quickly and reliably at a low cost regardless of location. It is to provide an information display system.

1 is a waveform diagram of a baseband frequency spectrum of an FM additional broadcast signal.

2 is a view for explaining a frame structure of the FM DARC scheme for transmitting additional information according to an embodiment of the present invention.

3A to 3D are diagrams for explaining the configuration of a data packet according to the present invention.

4 is a block diagram of a fixed FM additional broadcast transmission and reception system according to an embodiment of the present invention.

FIG. 5 is a configuration diagram illustrating an example of the FM additional broadcast signal generation unit of FIG. 4.

6 is a block diagram of a mobile FM additional broadcast transmission and reception system according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: FM additional broadcast transmitter 110: FM additional broadcast signal generator

1100: stereo generator 1110: matrix circuit

1120: frequency doubler 1130: multiplier

120, 620: FM radio transmitter 1200: 4 multipliers

1300: LMSK generator 1400: summer

210, 810: FM radio receiver 220, 700: information input unit

240, 440, 840: display unit 610: information providing server

410: public wireless network receiver 600: FM additional broadcast transmitter

712 RF receiver 820 data storage memory

230, 730, 830: system control unit 200, 714, 800: FM additional broadcasting receiver

The information transmission and reception system using the FM additional broadcasting according to one feature for realizing the above object of the present invention,

An FM additional broadcast transmitter for adding RF in real time by adding additional information including news, stocks, weather, traffic, and sports information to a general FM radio broadcast signal; And

And an FM additional broadcasting receiver for separating the additional information from the RF transmission signal received in the fixed state and displaying at least one of the separated additional information and its own information.

In addition, the information transmission and reception system using the FM additional broadcasting according to one feature for realizing the above another object of the present invention,

An FM additional broadcast transmitter for adding RF in real time by adding additional information including news, stocks, weather, traffic, and sports information to a general FM radio broadcast signal;

An information input unit which edits and inputs its own information including advertisements and announcement information; And

And an FM additional broadcasting receiver for separating the additional information from the RF transmission signal received in the moving state and displaying at least one of self information and the separated additional information provided from the information input unit.

According to the information transmission and reception system using the FM additional broadcasting, it is possible to wirelessly transmit, receive, and display fast and reliable information in real time regardless of a place at low cost.

Then, embodiments will be described so that those skilled in the art can easily implement the present invention.

2 is a view for explaining a frame structure of the FM DARC scheme for transmitting additional information according to an embodiment of the present invention.

As shown in FIG. 2, one frame of the FM DARC scheme for transmitting additional information according to an embodiment of the present invention includes 190 information blocks composed of 288 bits and 82 parity blocks composed of 288 bits.

Each information block is composed of a 16-bit block identification code, a 176-bit data packet, a 14-bit Cyclic Redundancy Check (CRC) code, and an 82-bit parity. Each parity block consists of a 16-bit block identification code and 272 bits of parity.

In general, the data link layer serves as a data set for transmitting all data packets from the upper layer to the physical layer where the actual data transmission is performed. In this case, the information of the header added to the data packet is used for various information required for data transmission in the network. Create a CRC to record the information so that it can be used as a reference for the reception of data. The main function of the data link layer is to send the completed data packet from the upper layer to the physical, which is the final transport layer, without error. When there is no reception completion message at the receiving side Perform retransmission of data. In this way, error checking of data reception of the data link layer is performed by checking the CRC of the packet. When there is an error of the CRC, the transmission side is requested to retransmit. By specifying the other computer to receive data from other functions of the data link layer, the correct transmission is executed.

3A to 3D are diagrams for explaining the configuration of a data packet according to the present invention.

As shown in Figs. 3A to 3D, a 176-bit data packet of a frame according to the present invention is composed of a prefix and a data block, and the prefix includes 4 bits of service identification indicating the type of information content and is broadcast. Only information corresponding to the information display system can be extracted from the additional information.

Then, the present invention will be described in more detail through various embodiments of the present invention.

4 is a block diagram of a fixed FM additional broadcast transmission and reception system according to an embodiment of the present invention.

As shown in FIG. 4, the fixed FM additional broadcast transmission / reception system according to an embodiment of the present invention includes an FM additional broadcast transmitter 100 and an FM additional broadcast receiver 200.

The FM additional broadcast transmitter 100 includes an FM additional broadcast signal generator 110 and an FM radio transmitter 120 to provide additional information, such as news, stocks, weather, traffic, sports, etc., to a general FM radio broadcast signal. Add information and send in real time.

In this case, in order to enable the fixed FM additional broadcast transmission / reception system to obtain necessary data from data transmitted for another additional broadcast service, the FM additional broadcast transmitter 100 may assign a code of service identification to the transmitted data. If the code for identification is not assigned, the existing additional broadcast service can be used as it is in the fixed information display system.

The FM additional broadcast signal generator 110 will be described in more detail with reference to FIG. 5.

FIG. 5 is a configuration diagram illustrating an example of the FM additional broadcast signal generation unit of FIG. 4.

As illustrated in FIG. 5, the FM additional broadcast signal generator 110 includes a stereo generator 1100, a four multiplier 1200, an LMSK generator 1300, and a summer 1400.

The stereo generator 1100 includes a matrix circuit 1110, a frequency doubler 1120, and a multiplier 1130, and receives an L channel audio signal, an R channel audio signal, and a pilot tone signal. The first and second audio signals L + R and LR and the first multiplication signal 1131 are output.

In more detail, the matrix circuit 1100 receives the audio signal of the L channel and the audio signal of the R channel, provides the first audio signal L + R to the summer 1400, and the second audio signal LR. Are provided to the multiplier 1130 and the LMSK generator 1300, respectively.

The frequency doubler 1120 receives the pilot tone signal from the outside and multiplies it and provides the multiplier 1130 to the multiplier 1130.

The multiplier 1130 multiplies the second audio signal L-R provided from the matrix circuit 1110 and the frequency doubled signal provided from the frequency doubler 1120 and provides the multiplier 1400 to the summer 1400.

The frequency quadruple 1200 receives the pilot tone signal from the outside and multiplies it by four to provide the quadrupled pilot signal 1201 to the LMSK generator 1300.

The LMSK generator 1300 restricts the amplitude of the second audio signal LR provided from the stereo generator 1100 by using a level controlled mininum shift keying scheme for the input data. The LMSK signal 1301 is provided to the summer 1400 using a modulation scheme.

The summer 1400 receives the first audio signal L + R and the multiplication signal 1131 from the stereo generator 1100, and receives the pilot signal and the LMSK signal 1301 from the LMSK generator 1300 from the outside, respectively. The received information is summed and output to the FM radio transmitter 120.

The FM radio transmitter 120 receives the FM additional broadcast signal s (t) from the FM additional broadcast signal generator 110 and modulates the FM additional broadcast signal s (t) and transmits the FM additional broadcast signal through the antenna.

At this time, the signal s (t) transmitted is

here, Wow Is a data string of I and Q channels.

The FM additional broadcast receiver 200 includes an FM radio receiver 210, an information input unit 220, a system controller 230, and a display unit 240 so that additional information is added to a general FM broadcast signal from the FM additional broadcast transmitter 100. The mixed FM additional broadcast signal is received and displayed on the screen.

More specifically, the FM radio receiver 210 includes an RF receiver 212 and an FM additional broadcast receiver 214 to demodulate an FM additional broadcast signal input through a broadcast receiving antenna, and add the demodulated FM radio signal from the demodulated FM radio signal. The information is separated and the separated additional information is provided to the system controller 230.

The information input unit 220 edits the input information by the operator of the system, and provides the system control unit 230 with the edited input information by itself, such as advertisements and announcements to be displayed individually due to the characteristics of the information display system.

The system controller 230 selects at least one of additional information separated from the FM radio receiver 210 and its own information edited from the information input unit 220, and provides the selected information to the display unit 240, and the display unit 240 is a system controller. The corresponding information provided from 230 is displayed. In this case, the display unit 240 is generally preferably in the form of a signboard that is fixedly arranged in an area with a high flow population, for example, a public office, an airport, a terminal, a port.

As described above, the fixed information display system in the form of a signboard for receiving an FM additional broadcast according to an embodiment of the present invention is configured to display information such as news, stocks, weather, traffic, sports, etc., which are added to a general FM radio broadcast signal. It may be received and displayed, or display information such as advertisements or announcements that are self-edited by the operator of the information display system.

6 is a block diagram of a mobile FM additional broadcast transmission and reception system according to another embodiment of the present invention.

As shown in FIG. 6, the mobile FM additional broadcast transmission / reception system according to another embodiment of the present invention includes an FM additional broadcast transmitter 600, an information input unit 700, and an FM additional broadcast receiver 800.

The FM additional broadcast transmitter 600 includes an information providing server 610 and an FM radio transmitter 620 to transmit information such as news, stocks, weather, sports, and traffic in real time in the form of FM additional broadcast. In this case, in order to enable the mobile information display system to obtain necessary data from data transmitted for another additional broadcasting service, the information transmitting unit may assign a code of service identification to the transmitted data, and a code of service identification is not assigned. If not, it is possible to use the existing supplementary broadcast service as it is in the mobile information display system.

In addition, due to the characteristics of the information display system displays advertisements and announcements that should be displayed separately, wherein the information input unit 700 can be input in the editor connected to the communication port of the information display system, the input data is FM additional broadcasting The memory is stored in a predetermined memory of the receiver 800.

The FM additional broadcast receiver 800 includes an FM radio receiver 810, a data storage memory 820, a system controller 830, and a display unit 840 to receive an FM additional broadcast signal provided from the FM additional broadcast transmitter 600. Receive and display on a schedule screen.

More specifically, the FM radio receiver 810 includes an RF receiver 712 and an FM additional broadcast receiver 714 to demodulate an FM radio signal input through a broadcast receiving antenna, and to provide additional information from the demodulated FM radio signal. And separate the additional information to the system control unit 730.

The data storage unit 820 stores its own information provided from the information input unit 700 according to an operation of an operator of the information display system and provides the stored system information to the system controller 830 according to a request of the system controller 830. do.

The system controller 830 selects at least one of additional information provided from the FM additional broadcast receiver 814 of the FM radio receiver 810 and self information previously input from the data storage memory 720. The display unit 740 is provided, and the display unit 740 displays schedule information received from the system control unit 730. In this case, the display unit is preferably a display device such as a display board.

As described above, the mobile information display system in the form of a signboard for receiving FM additional broadcasting according to another embodiment of the present invention can be constructed and operated regardless of a location at low cost, and more reliable information can be obtained. Can be delivered quickly.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

As described above, according to the present invention, additional information is added to the FM radio broadcast signal to be transmitted in real time to the fixed information display system side or in real time to the mobile information display system side. Additional broadcasting transmission and reception system can be constructed and operated at the mobile location, and more reliable information can be provided in real time and quickly.

Claims (8)

An FM radio receiver which receives and demodulates an FM radio broadcast signal including additional information and separates additional information from the demodulated FM radio signal; Information input unit for inputting its own information to be displayed separately according to the characteristics of the system, A system controller which selects and outputs at least one of additional information provided from the FM radio receiver and its own information provided from the information input unit, and Display unit for displaying information provided from the system control unit Information receiving system using an FM additional broadcast comprising a. delete An FM radio receiver which receives and demodulates an FM radio broadcast signal including additional information and separates additional information from the demodulated FM radio signal; Data storage unit that stores its own information to be displayed separately according to the characteristics of the system, An information input unit for inputting the own information, A system controller for selecting and outputting at least one of additional information provided from the FM radio receiver and its own information stored in the data storage; Display unit for displaying information provided from the system control unit Information receiving system using an FM additional broadcast comprising a. The method of claim 3, And an information input unit for inputting the self information. The method according to claim 1 or 3, And the additional information is added to the FM radio broadcast signal according to one of the FM DARC transmission protocol and the FM RDS transmission protocol. The method according to claim 1 or 3, The display unit is an information transmission and reception system using FM additional broadcasting which is a display device in the form of an electronic sign. FM additional broadcasting transmitter for real-time adding RF information to the general FM radio broadcast signal, and An FM radio receiver which receives and demodulates an FM radio broadcast signal including additional information, and separates additional information from the demodulated FM radio signal, an information input unit for inputting its own information to be displayed separately according to characteristics of a system, and FM additional broadcast receiver including a system controller for selecting and outputting at least one of additional information provided from the FM radio receiver and its own information provided from the information input unit, and a display unit for displaying information provided from the system controller Information transmission and reception system using an FM additional broadcast comprising a. FM additional broadcasting transmitter for real-time adding RF information to the general FM radio broadcast signal, and An FM radio receiver which receives and demodulates an FM radio broadcast signal including additional information, and separates additional information from the demodulated FM radio signal, a data storage unit storing its own information to be displayed separately according to characteristics of the system; An information input unit for inputting the self information, a system control unit for selecting and outputting at least one of additional information provided from the FM radio receiver and the self information stored in the data storage unit, and information provided from the system control unit FM additional broadcast receiver including a display unit Information transmission and reception system using an FM additional broadcast comprising a.