KR101866998B1 - Repeater capable of transmitting the optional signal of broadcasting channel - Google Patents

Repeater capable of transmitting the optional signal of broadcasting channel Download PDF

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Publication number
KR101866998B1
KR101866998B1 KR1020170130027A KR20170130027A KR101866998B1 KR 101866998 B1 KR101866998 B1 KR 101866998B1 KR 1020170130027 A KR1020170130027 A KR 1020170130027A KR 20170130027 A KR20170130027 A KR 20170130027A KR 101866998 B1 KR101866998 B1 KR 101866998B1
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South Korea
Prior art keywords
signal
unit
digital
broadcasting
emergency
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KR1020170130027A
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Korean (ko)
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김상윤
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(주)남경텔레콤
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H04H20/08—Arrangements for relaying broadcast information among terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
    • H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Radio Relay Systems (AREA)

Abstract

The present invention relates to a channel type FM relayer using a digital voice signal interface, and more particularly, to a channel type FM relayer using a digital voice signal interface, In order to solve the problem that the RF signal level of each channel varies depending on the receiving position or environment, the FM broadcasting signal received through the external antenna is converted into a voice signal through FM demodulation having excellent reception sensitivity, The FM signal is generated and transmitted by FM modulation after making the original sound signal after filtering so that the RF signal level of each channel in the FM broadcasting signal is changed to the FM broadcasting of all channels irrespective of the radio signal level or the RF signal level difference between each channel The function of the primary relay station to provide stable service and the mandatory A secondary relay device for making FM emergency broadcasting in a specific, multiple or all channels by using a digital voice interface for the function of an emergency FM transmitter corresponding to an emergency broadcasting or a disaster broadcasting requesting the emergency broadcasting, The present invention relates to a channel type FM retransmission apparatus using a digital voice signal interface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a channel type FM relayer apparatus using a digital voice signal interface,

The present invention relates to a channel-based FM relayer using a digital audio signal interface, and more particularly to a channel-type FM relayer which uses a digital audio signal interface to solve the problem that an RF signal level of each channel of an FM broadcast signal including various channels varies depending on a reception position or environment An interface for demodulating the received FM broadcasting signal into a voice signal which is a baseband signal and converting the received FM broadcasting signal into a noise-resistant digital signal for interfacing with an external voice signal for an emergency broadcasting or a disaster broadcasting in an emergency It is an invention on thing.

The digitally converted signal is selectively output either of FM broadcasting or external broadcasting (emergency broadcasting or disaster broadcasting) according to a preset priority or a manual setting by a user. At this time, the selected signal is digitally filtered, Signal so that the RF signal level of each channel in the FM broadcast signal stably relays the FM broadcast of all channels irrespective of the radio signal level or the RF signal level difference between the respective channels, The present invention relates to a channel type FM relayer apparatus capable of stably transmitting an external broadcast signal through a channel.

In general, FM broadcasting is a broadcasting program designated as a transmission medium for disaster broadcasting in addition to DMB broadcasting. In FM broadcasting, in case of disaster, it is difficult to broadcast in general, for example, underground space of a building, underground tunnel, subway, And emergency or disaster broadcasts should be provided in case of an emergency. Therefore, an FM relay device is known and used so that the FM broadcast can be provided even in a place where such broadcasting is not easy.

The FM relay device that relays the FM broadcast to the underground space receives the signal through the antenna installed at a position where the FM broadcast signal is easily received by being exposed to the outside such as the building roof, amplifies the received FM broadcast signal, And transmits the broadcast to a position where the broadcast is transmitted.

Since the quality of service is determined according to the FM radio signal input from the external antenna, the conventional FM relay device has a weak FM signal such as a tunnel (structure surrounded by mountains) or an urban area (location surrounded by a tall building) The location of the FM antenna for receiving external signals has been limited in the case of a region where the signal level is largely deviated due to the reflected waves due to buildings and the like.

In addition, when the distance between the signal receiving position where the signal is received (for example, the antenna mounting position) and the target position (for example, the underground space) is slightly different, The broadcast shall be transmitted through the communication line separately installed.

Typically, in this case, the FM broadcasting signal received at the signal receiving position is converted into an optical signal, the converted optical signal is transmitted through the optical cable installed up to the target position, and the FM signal is re- And is configured to service the broadcast. In this case, the installation cost of the optical cable for FM broadcast relay occurs. However, since the optical cable is expensive compared to the general communication line and the cost increase is larger in proportion to the separation distance, the initial installation cost is increased and the cost efficiency is lowered.

Also, even if the FM broadcast signal receiving position is easy to receive signals, it is generally impossible to uniformly receive a plurality of signal levels of all the broadcast channels providing FM broadcast. Therefore, there is a problem that when the FM broadcasting signal of different channel level is simply amplified and relayed, a difference in service quality is generated for each channel of each broadcasting. In order to prevent this, there is a technique of adjusting the level of a channel signal using an RF digital filter and an attenuator for each channel. However, when a signal having a rated input level (about -60 to -70 dBm) is input, Can not be increased to infinity and the noise level also increases with the amplification of the signal, which affects the reception sensitivity of the FM radio, so that the same quality can not be maintained for all the broadcasting channels.

In the meantime, as described above, in order to make an FM broadcast in a subterranean section such as a building underground, a parking lot, a tunnel, and a subway for disaster broadcasting or emergency broadcasting, a repeater for the disaster broadcasting is installed. However, in spite of building FM broadcasting equipment for emergency broadcasting in a specific tunnel, subway, shopping center, building, etc., emergency broadcasting or announcement broadcasting is performed through a separate broadcasting equipment have. This is because the FM equipment can not broadcast only the frequency of a specific channel in the transmitting apparatus, and therefore it is not a structure capable of broadcasting in all channels like civil defense training.

Therefore, it is possible to receive not only a signal of a predetermined level receivable from the outside but also an input signal up to a level receivable by a broadcast receiving apparatus in an emergency, such as radio, The development of an FM relay device is required.

The present invention has been made to solve the above problems,

(For example, -100dBm) that can be demodulated irrespective of an external input signal, demodulates the FM signal, converts it to a digital signal (I2S), filters it, and FM- And it is an object of the present invention to provide a relay device that assures quality of all channels and services the same as a signal.

In addition, the present invention minimizes noise and the like that can occur when an external signal (voice signal) is connected by converting an FM radio signal into a digital signal and processes it, and solves the problem of emergency broadcasting, The present invention provides a relay apparatus capable of selectively transmitting an emergency broadcast or an announcement broadcast on a specific channel as well as all the service channels by enabling selection of an FM broadcast or an emergency broadcast.

In addition, by including a configuration for demodulating the FM signal, even in the configuration including the optical repeater, signals can be transmitted using only the required bandwidth without using the entire optical core, and a QoS (Quality of Service) can be guaranteed The present invention aims to enable various configurations such as remote emergency broadcasting and remote full broadcasting because services can be performed using an Ethernet line.

According to an aspect of the present invention,

A channel type FM relayer for a digital voice signal interface, comprising: an antenna for receiving an FM broadcast signal; An FM demodulator demodulating the FM broadcast signal received through the antenna into a voice signal and outputting the voice signal; A digital interface for providing a digital voice signal interface and converting the received signal into a voice signal capable of FM modulation; An FM modulator for modulating the voice signal output from the digital connection unit into an FM radio signal and outputting the modulated voice signal; A filter unit for filtering the FM radio signal output from the FM modulator to a predetermined frequency band and outputting the filtered signal; And an interface for inputting and outputting an emergency broadcasting signal, and for transmitting an emergency broadcasting signal to the digital connection unit when an emergency broadcasting signal is input, wherein the digital connection unit comprises: an FM broadcast output from the FM demodulation unit; And selectively outputs any one of the emergency broadcasts received by the emergency broadcast section according to a preset priority or a manual setting by a user.

The multiplexing unit multiplexes the digital voice signal converted through the digital connection unit and transmits the multiplexed digital voice signal to a remote location, receives the remote signal transmitted from the remote location, And the digital connection unit transmits either the FM broadcasting signal output from the FM demodulation unit, the emergency broadcasting signal received from the emergency broadcasting unit, or the remote signal to the digital connection unit through a predetermined priority or manually by the user And selectively outputs the data according to the setting.

The control unit may further include a control operation unit for selectively applying either the emergency broadcast signal or the remote signal to the digital connection unit according to a preset priority or a manual setting by a user.

The control operation unit includes signal input / output interface means and a switching circuit for selecting a signal, and controls the switching circuit on the basis of a control operation input received from the user through the signal input / output interface, And controls to selectively apply either the input of the emergency broadcast signal input through the multiplexer or the FM broadcast signal received through the antenna to the digital connection unit.

The FM demodulation unit, the digital connection unit, and the FM modulation unit are included in the single channel card, and the channel card unit includes channel cards of the same number as the broadcasting channel included in the FM broadcasting signal, A first distributor for distributing an FM broadcast signal to a channel card allocated to each of the broadcast channels in the FM broadcast signal and a second distributor for synthesizing the signals output from the channel card unit, .

The apparatus may further include at least one amplification unit for amplifying at least one signal level of the FM broadcast signal received through the antenna or the FM radio signal output through the FM modulation unit.

The apparatus may further include an FM band filter for filtering at least one of the FM broadcast signal received through the antenna or the FM radio signal output through the FM modulator to a predetermined band.

The channel type FM relayer using the digital voice signal interface of the present invention has the following advantages.

1) The installation position of the external antenna connected to the relay device of the FM broadcasting is not limited to the position where the level of the FM broadcasting signal for each broadcasting is received at a predetermined level or more, and the obstacle obstructing the reception of the signal, It is possible to provide a broadcasting service through relay of stable FM broadcasting even in an obstacle terrain.

2) In the case of a continuous section such as a subway, FM radio reception is not implemented in all the histories, so that it is possible to prevent unnecessary cost wasted by receiving an external input signal and transmitting it to an optical cable by using an optical repeater.

3) Various voice signals can be selectively converted into digital voice signals, and it is possible to perform the functions of emergency channels using a full channel or a specific channel in a desired manner.

4) By establishing a system for converting the FM broadcasting signal based on the digitally converted voice signal (I2S) interface, a user who is remotely accessable and is obliged to broadcast an emergency, for example, a terrestrial management unit The facility management department that manages the underground shopping mall offers the merit of emergency emergency broadcasting in case of an emergency.

1 shows the overall configuration of an FM relay apparatus in an embodiment of the present invention.
2 is a block diagram showing the configuration of any one of the channel cards included in the channel card unit 2 according to the embodiment of the present invention.
FIG. 3 is a flowchart illustrating a step-by-step procedure of a signal flow of a channel-based FM relayer using a digital voice signal interface according to a preferred embodiment of the present invention.
FIG. 4 is a flow chart schematically illustrating a signal processing process of a channel type FM relayer using a digital voice signal interface according to a preferred embodiment of the present invention during general FM broadcasting and emergency broadcasting.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The word is described based on the principle that the inventor can properly define the concept of a term in order to explain his or her invention in the best way. The word is interpreted as a meaning and concept consistent with the technical idea of the present invention. . Therefore, the embodiments described in this specification and the technical structures shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It should be understood that various equivalents and modifications are possible. In addition, the terms used herein are used for the purpose of easy understanding of specific embodiments, and are not intended to limit the present invention. It is to be understood that the elements described in the singular form in this specification include plural forms unless otherwise specified.

The present invention relates to a channel type FM relayer using a digital voice signal interface,

In order to solve the problem that the RF signal level of each channel of the FM broadcast signal including various channels varies according to the reception position or the environment, the received FM broadcast signal is converted into a digital voice signal, , And a digital connection (I2S) interface for emergency broadcasting. The external connection of the broadcasting signal, the FM broadcasting or the emergency broadcasting is selected according to the preset priority or the manual setting by the user, and then reconverted to the FM- And then FM modulated again to generate and transmit a transmission signal,

A function of a primary FM repeater configured to stably relay FM broadcasts of all channels irrespective of a radio signal level or an RF signal level difference between channels in the FM broadcast signal,

The function of the secondary FM repeater which enables the emergency broadcasting and the disaster broadcasting in the self section where the remote or FM repeater is installed in the emergency can be stably performed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 shows the overall configuration of an FM relay apparatus in an embodiment of the present invention.

1, a signal received through an antenna 100 and input from the outside is input to a low noise amplifier through an input filter (88-108 MHz) for eliminating other band signals, (200).

The FM radio signal regenerated by the channel card unit 200 is input to a preamplifier unit by combining 20 channel signals through a divider (combiner). The preamplifier is configured to maintain the signal level loss of the 20 channel distributor and to match the desired output level. The signal output from the preamplifier is transmitted to a high output amplifier and amplified. The signal is output through a final filter to remove harmonics or low harmonics that may occur.

The low noise amplifying unit is for preventing a noise level of an FM broadcast signal input to the channel card unit 200 from increasing due to a loss of a divider for a 20 channel configuration, , And the FM radio signal is amplified while maintaining a low noise figure.

The channel card unit demodulates and modulates the FM radio signal input through the divider for multi-channel configuration to restore the FM radio signal. In this process, the channel card unit performs digital conversion (I2S) of the FM- It is possible to selectively transmit the FM broadcasting signal and the signal of the emergency broadcasting or the special purpose purpose.

The channel card unit 200 should have a channel card of a minimum public broadcasting channel or more. In the preferred embodiment of the present invention, the channel card unit 200 is configured to include 20 channel cards. In the embodiment where the channel card unit 200 includes 20 channel cards, it can be understood that the broadcasting frequencies that can be transmitted by the relay apparatus are 20. This means that 20 broadcasts from all FM broadcasts can be received to process the signal. However, it should be understood that the number of channel cards included in the channel card unit 200 of the present invention is not limited to the above-described 20, and it is possible to expand a channel without restriction as needed.

2 is a block diagram showing the configuration of any one of the channel cards included in the channel card unit 2 according to the embodiment of the present invention (hereinafter referred to as a "channel card unit" for convenience of explanation). Referring to FIG. 2, the channel card unit 2 of the preferred embodiment of the present invention includes an FM demodulation unit 10, a digital connection unit 20, an FM modulation unit 30, and a filter unit 40.

1, the FM demodulation unit 10 receives a specific FM broadcast signal, which is received through an antenna 100 provided outside and distributed through a distributor, at a front end and converts it into a voice signal Element.

The FM demodulation unit 10 may have the same configuration as an FM broadcast signal demodulation module (including an FM demodulation circuit) applied to a commonly used FM radio receiver, and may be configured such that the reception sensitivity of the FM demodulation unit 10 is guaranteed Demodulates the FM broadcast signal up to a level to be converted into a voice signal, and transmits the voice signal to a digital connection unit 20 to be described later.

In other words, an FM broadcast signal is input to the FM demodulation unit 10 and is converted into a voice signal via the FM demodulation unit 10 and output.

The digital connection unit 20 receives the voice signal output from the FM demodulation unit 10 and digitizes the received voice signal to provide an interface for external input or external signal transmission, To be converted into a voice signal so as to be reproduced. Preferably, the digital connection unit includes an ADC (Analog to Digital Converter) or a CODEC (CODER DECODER).

2, the digital connection unit 20 is connected to the emergency broadcasting unit 50 and the multiplexing unit 60 so as to communicate with each other. Therefore, since the digital connection unit provides the I2S interface, which is a digital voice standard standard, the digital voice signal output according to need is transmitted to the FM broadcasting received through the antenna 100, the emergency broadcasting signal input through the emergency broadcasting unit, And a remote broadcasting signal input through the remote broadcasting unit. The configuration of the emergency broadcasting unit 50 and the multiplexing unit 60 will be described later.

Also, in a preferred embodiment of the present invention, the digital voice signal selected or converted by the digital connection unit 20 is configured according to the I2S (Integrated Interchip Sound) communication standard and is re-converted into a voice signal capable of FM modulation To the FM modulation unit 30 to be described later.

The FM modulating unit 30 is a component for modulating the voice signal transmitted from the digital interface unit 20 into an FM radio frequency signal. If necessary, a modulation frequency is set so that modulation and conversion of the signal with a desired arbitrary frequency signal It is possible. The FM radio frequency signal modulated by the FM modulation unit 30 is transmitted to the filter unit 40. [

The filter unit 40 is a component for removing noises or unnecessary signals such as modulation noise or spurious signals generated when the FM modulating unit 30 modulates a digital voice signal into an FM radio frequency signal. The filter unit 40 may include a band-pass filter, a high-pass filter, a low-pass filter, or the like, It should be understood that any filter known in the art may be included.

The emergency broadcast unit 50 includes various interfaces for inputting and outputting audio signals in order to transmit an external broadcast in place of the FM broadcast received through the antenna 100 in an emergency.

In the preferred embodiment of the present invention, the emergency broadcasting unit 50 may include a microphone for receiving an emergency broadcasting signal from a user for separate external broadcasting in an emergency. However, it should be understood that the emergency broadcast section 50 of the present invention is not limited to such means but may include all known means for inputting a voice signal for emergency broadcasting.

The emergency broadcasting unit 50 includes an audio input terminal (for example, an AUX or an audio jack) provided to be able to be connected to audio devices capable of generating or transmitting audio signals, for example, Lt; / RTI > In addition, the emergency broadcasting unit 50 may be configured to convert an earphone or a receiver terminal used for a radio, a telephone or the like into an audio terminal, and may be connected to the emergency broadcasting unit 50. The emergency broadcasting unit 50 may select an emergency broadcasting signal and convert it into a digital audio signal To the digital connection unit (20) or the multiplexing unit (60).

The emergency broadcasting signal input through the emergency broadcasting unit 50 is input to the digital connection unit 20 and is modulated into an FM radio signal according to a selection made through a control operation unit 70 to be described later.

The multiplexing unit 60 is a component for multiplexing the digital audio signal I2S converted through the digital connection unit 20 and remotely transmitting the digital audio signal I2S to a remote place or receiving a multiplexed signal remotely transmitted from a remote place. The digitally converted digital voice signal can be remotely transmitted through I2S standard communication or the like so that the multiplexer 60 is provided for realizing remote emergency broadcasting.

In the preferred embodiment of the present invention, the remote connection to the remote site through the multiplexer 60 may include an Ethernet interface with a guaranteed bandwidth, or may be implemented using a known communication network, for example, Lt; / RTI > To this end, the multiplexer 60 includes public communication means such as an optical cable connection using a communication means for communication with a remote site, for example, an Ethernet to Optic converter, .

The control operation unit 70 is a component provided to allow the user to select a broadcast to be actually relayed among the input of the emergency broadcasting unit 50 and the FM broadcasting signal received through the antenna 100. [ The control operation unit may be configured to perform a control operation related to communication in connection with a remote place through the multiplexing unit 60. [

To this end, the control operating unit 70 includes means for selecting any one of the signals according to a user's control operation input or a predetermined algorithm, for example, a signal input / output interface means and a switching circuit for selecting a signal Lt; / RTI >

FIG. 3 is a flowchart illustrating a step-by-step procedure of a signal flow in a channel-based FM relayer using a digital voice signal interface according to a preferred embodiment of the present invention. FIG. 4 is a flow chart schematically illustrating a signal processing process of a channel type FM relayer using a digital voice signal interface according to a preferred embodiment of the present invention during general FM broadcasting and emergency broadcasting.

As described above, the channel type FM retransmitting device using the digital voice signal interface of the present invention receives various FM broadcasts, converts the received FM broadcast signals into digital voice signals to provide various interfaces for emergency broadcasting, Converts the signal into a voice signal capable of FM modulation, and FM-modulates the signal again.

As shown in FIG. 3, the FM broadcast signal received through the antenna 100 first passes through the FM band filter and other band signals other than the predetermined band are removed (S001). The FM band-pass filter may be, for example, a filter of 88 to 108 MHz.

An FM broadcast signal having passed through the band filter and filtered out signals other than the requested band is applied to the low noise amplifier (S002), amplified through the low noise amplifier, and applied to the distributor. In this stage, in order to prevent the noise index of the FM broadcast signal from increasing in the process of distributing the FM broadcast signal through the distributor, the low noise amplifier keeps the low noise figure of the FM broadcast signal, Lt; / RTI >

The FM broadcast signal amplified by the low-noise amplifier and applied to the divider is distributed through the divider (combiner) and applied to the channel card allocated to each channel of the channel card unit (S003).

In step S003, the FM broadcasting signal applied to the channel card is converted into a voice (stereo) signal in the FM demodulation unit included in the channel card (S004), and the digital broadcasting signal is supplied to the digital connection unit 20 included in the channel card as a voice signal And transmits the converted FM broadcast signal.

The digital connection unit 20 can communicate with an external device by converting an FM broadcast signal converted into a voice signal received by the FM demodulation unit 10 into a digital voice signal and transmitting the digital voice signal to the multiplexer, Receives a digital voice signal for emergency broadcasting from an outside (emergency broadcasting unit or multiplexing unit) (for imposing an FM requirement), receives a remote access signal received from an external device through a multiplexing unit, The control operation unit selects a signal to be used by selection according to a preset priority or a manual setting by a user and converts the selected signal into a voice signal capable of FM modulation (S005).

In this step, the digital connection unit 20 removes noise that may occur during the connection of analog voice signals, increases the stability by using a digital voice signal I2S (Integrated Interchip Sound) interface, and selects a broadcast signal of each channel. The audio signal output from the digital connection unit 20 is transmitted to an FM modulation unit 30 to be described later.

Converted into a digital audio signal such as an FM broadcast signal, an emergency broadcast signal, a remote access signal, etc., and then transmitted to the FM modulator 30, ) Modulates the audio signal input from the digital connection unit 20 into an FM radio frequency signal conforming to the FM radio standard that can be received by a general FM radio (S006). At this stage, the FM radio frequency signal modulated through the FM modulation unit 30 is transmitted to the filter unit 40. [

If the FM broadcasting signal modulated with the FM radio frequency signal is received through the FM modulation unit 30 in the above step, the filter unit 40 modulates the audio signal into the FM radio frequency signal in the FM modulation unit 30 Noise such as modulation noise or spurious, or unnecessary signal is removed (S007).

In step S008, the FM broadcast signal including the filtered FM radio frequency signal through which noise and unnecessary signals are filtered passes through the distributor again, and a plurality of channel signals output from each channel card are synthesized (S008). At this stage, the FM broadcast signal in which the channel signals are synthesized is transmitted to the preamplifier unit.

The preamplifier unit 3 receives the FM broadcast signal received through the step S008 in order to maintain the loss due to the distribution of the FM broadcast signal to each channel (20 channels) through the distributor, Amplified (S009), and transmitted to the high-power amplifier, so that the high-power amplifier amplifies the output to a level for FM broadcast output (S010).

Thereafter, the high-power amplified FM broadcast signal passes through the FM band-pass filter and the harmonic or low harmonic component noise that may occur in the steps S009 and S010 is filtered (S011), and broadcast output is performed (S012).

On the other hand, the voice signal (mono or stereo) input through an apparatus such as an audio jack or a microphone may be converted into a digital signal at any one of the steps S001 to S005 (or among the steps thereafter) The digital interface unit 20 proceeds to steps S006 through S012 as an external broadcast signal instead of the FM broadcast signal received through the step S001, So that broadcasting is performed (S013). At this stage, selection of a signal from the control operation unit 70 can be made.

If the communication with the remote device is performed by the multiplexer 60 in step S005 (or before or after the step S005), the digital interface receives the FM broadcast signal received through step S005 To the digital interface unit 20 by transmitting the remote access signal received from the remote device through the multiplexer 60 to the digital interface unit 20, Signal to the digital connection unit 20 (step S014). In this case, the selection of the signal may also be performed from the control operation unit 70. The digital connection unit 20 converts the received remote access signal into a voice signal capable of FM modulation, To the FM broadcast. The multiplexing unit 60 and the digital connection unit 20 connect to a remote site according to each function through a digital voice (I2S) interface.

In the channel type FM relayer apparatus using the digital audio signal interface of the present invention as described above, when the installation position of the external antenna 100 connected to the relay apparatus of the FM broadcast is higher than a predetermined level It is possible to provide a broadcasting service through relay of stable FM broadcasting even in an obstacle terrain such as an obstacle obstructing the reception of a signal, for example, mountains, and in a continuous section such as a subway, Since the FM radio reception is not implemented in the history, unnecessary expenditure of receiving an external input signal by using an optical repeater and transmitting it to an optical cable can be prevented, and various voice signals can be selectively converted into digital voice signals, Method, it is possible to use an entire channel or an emergency broadcast using a specific channel And a system for converting an FM broadcast signal on the basis of a digital converted voice signal (I2S) interface is provided, so that a user who is connected remotely and is obliged to broadcast an emergency, for example, It provides the merit of being capable of emergency broadcasting remotely in case of emergency in the land management department managing each tunnel or the facility management department managing each underground shopping mall.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the appended claims. It is not intended to be limiting. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: FM demodulator
20: Digital conversion unit
30: FM modulation section
40:
50: Emergency broadcasting department
60: multiplexer
70:
100: Antenna
200: Channel card part

Claims (7)

An FM demodulator for demodulating and outputting an FM broadcast signal received through an antenna as a voice signal;
A digital connection unit for providing a digital voice signal interface, converting the received signal into digital voice (I2S) conversion and converting it into a voice signal capable of FM modulation;
An FM modulator for modulating the FM signal output from the digital connection unit into an FM radio signal and outputting the modulated FM signal;
A filter unit installed at an output terminal of the FM modulator to filter the FM radio signal output from the FM modulator into a predetermined band and output the filtered signal; And
An emergency broadcasting unit which includes an interface for inputting and outputting an emergency broadcasting signal and converts the emergency broadcasting signal into a digital signal in order to select a digitally converted voice signal when an emergency broadcasting signal is inputted, thereby transmitting the emergency broadcasting signal to the digital connecting unit;
Lt; / RTI >
Wherein the digital connection unit comprises:
Wherein the control unit selectively outputs either the FM broadcast output from the FM demodulation unit or the emergency broadcast received by the emergency broadcast unit according to a preset priority or a manual setting by a user. Method FM Relay Device.
The method according to claim 1,
A multiplexer including communication means for communicating with a remote site;
Further comprising:
Wherein the multiplexer multiplexes the digital voice signal converted through the digital connection unit and transmits the multiplexed digital voice signal to a remote location,
Receives the remote signal transmitted from the remote site and transmits the received remote signal to the digital connection unit,
Wherein the digital connection unit comprises:
And selectively outputs either the FM broadcasting signal output from the FM demodulation unit, the emergency broadcasting signal received from the emergency broadcasting unit, or the remote signal according to a preset priority or manual setting by a user. Channel - Based FM Relaying Device Using Voice Signal Interface.
3. The method of claim 2,
A control operation unit for selectively applying either the emergency broadcast signal or the remote signal to the digital connection unit according to a preset priority or a manual setting by a user;
Further comprising a digital audio signal conversion unit for converting the digital audio signal into a digital audio signal.
The method of claim 3,
Wherein the control operating section includes signal input / output interface means and a switching circuit for selecting a signal,
And controlling the switching circuit based on a control operation input received from the user through the signal input / output interface to input either one of an input of an emergency broadcasting signal inputted through the emergency broadcasting section or the multiplexing section and an FM broadcasting signal received through the antenna Wherein the control unit controls the digital interface unit to selectively apply the digital audio signal to the digital interface unit.
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KR1020170130027A 2017-10-11 2017-10-11 Repeater capable of transmitting the optional signal of broadcasting channel KR101866998B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060010052A (en) * 2004-07-27 2006-02-02 홍영래 Digital type broadcast repeating apparatus in underground
KR20100039762A (en) * 2008-10-08 2010-04-16 천지전력정보주식회사 Apparatus for repeating multiple radio broadcastingsignal
KR20130092920A (en) * 2012-02-13 2013-08-21 양영석 Apparatus for integrated remote emergency broadcasting integrated

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060010052A (en) * 2004-07-27 2006-02-02 홍영래 Digital type broadcast repeating apparatus in underground
KR20100039762A (en) * 2008-10-08 2010-04-16 천지전력정보주식회사 Apparatus for repeating multiple radio broadcastingsignal
KR20130092920A (en) * 2012-02-13 2013-08-21 양영석 Apparatus for integrated remote emergency broadcasting integrated

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