JP2010045654A - Notification broadcasting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a notification broadcasting system improving the certainty of group setting when a center apparatus performs the group setting of receivers. <P>SOLUTION: The center apparatus 10 includes a group setting control part 18a for transmitting a group setting signal including a group address for uniquely identifying a group for classifying receivers 20 and a control command for instructing the setting of a group address to receivers 20. Each receiver 20 includes a group setting control part 30a for storing the group address included in the group setting signal in a memory 29 of the receiver 20 as the group address of the group to which the receiver 20 belongs if the setting of the group address is instructed by the control command included in the group setting signal when receiving the group setting signal. The group setting control part 18a in the center apparatus 10 repeatedly transmits the same group setting signal a plurality of times. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a notification broadcasting system for performing notification broadcasting.

  Notification broadcasting systems for performing various types of notification broadcasting from a center to a plurality of dwelling units are widespread. This notification broadcasting system is generally configured by connecting a center device arranged on the center side and a receiver installed in each dwelling unit via a transmission line such as CATV. Then, when performing general broadcasts such as holding local events or emergency broadcasts in the event of a fire or earthquake, the center device transmits a notification broadcast signal via a transmission line, and the receiver receives the notification broadcast signal. Then, the announcement broadcast is output by voice through a speaker (see, for example, Patent Document 1).

  Here, in the notification broadcast, there are cases where it is desired to broadcast only to a specific dwelling unit instead of all dwelling units depending on the purpose and content of the broadcast. For example, I want to broadcast information about a specific administrative district only to each unit in that administrative district, or I want to broadcast information about a specific geriatric association or women's association only to each dwelling unit enrolled in that association. There is a case.

  For this reason, when a group address is conventionally set in the receiver of each dwelling unit and the group address included in the notification broadcast signal transmitted from the center device matches the group address set to itself in each receiver. Only in the case of the notification broadcast output by the notification broadcast signal.

  Furthermore, since it is difficult for an attendant to go to the dwelling unit to set such a group address, a group setting signal is transmitted from the center device to the receiver, and the receiver automatically performs the setting based on the group setting signal. In particular, a technique for setting a group address has also been proposed (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 9-8753 JP 2006-311024 A

  However, when the group address is automatically set by the group setting signal, it cannot be confirmed from the center apparatus side whether or not the group address setting in the receiver is correctly completed. For example, when a group setting signal is transmitted, there is a possibility that the transmission line is disconnected due to a disaster or the power of the receiver is turned off. In such a case, in the receiver Although the group address setting is not performed, the setting state of the group address cannot be confirmed from the center device side.

  Here, in order to confirm whether or not the group setting is correctly completed, the group setting completion signal is transmitted from the receiver to the center device when the group setting is completed, and the center device side transmits the group setting completion signal. It may be possible to check whether or not the group setting is completed based on the presence or absence. However, the announcement broadcasting system is generally configured only for signal transmission in the downlink direction from the center device to the receiver, and signal transmission in the uplink direction is difficult due to the system configuration. Not realistic. For this reason, it has been desired to increase the reliability of group setting without depending on the signal from the receiver.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a notification broadcasting system capable of improving the reliability of group setting when the group setting of the receiver is performed from the center device side. And

  In order to solve the above-described problems and achieve the object, the notification broadcast system according to claim 1 receives the notification broadcast signal transmitted from the transmission unit by the reception unit via the transmission line, and performs the notification broadcast. A notification broadcasting system for performing notification broadcasting based on a signal by the receiving means, wherein the transmitting means instructs a group address for uniquely identifying a group that divides the receiving means and setting of the group address. A transmission side group setting control means for transmitting a group setting signal including a control command to the receiving means via the transmission line, wherein the receiving means is transmitted from the transmitting means via the transmission line. When the group setting signal is received, setting of the group address is instructed by the control command included in the group setting signal. A receiving side group setting control means for storing the group address included in the group setting signal as a group address of the group to which the receiving means belongs in a storage means of the receiving means, The transmitting side group setting control means of the transmitting means repeatedly transmits the same group setting signal a plurality of times.

  The notification broadcast system according to claim 2 is the notification broadcast system according to claim 1, wherein the transmission means includes transmission side storage means for storing importance information for specifying importance for each group address, The transmission side group setting control means of the transmission means transmits the group setting signal at a predetermined interval or a predetermined number of times according to the importance level specified by the importance level information stored in the transmission side storage means. It is characterized by doing.

  The notification broadcast system according to claim 3 is the notification broadcast system according to claim 1 or 2, wherein the transmission unit includes a time measuring unit for acquiring a current time, and the transmission side group setting of the transmission unit is provided. The control means transmits the group setting signal at a predetermined interval or a predetermined number of times according to the current time acquired by the time measuring means.

  According to the notification broadcasting system of claim 1, since the group setting signal is transmitted a plurality of times, the transmission line is disconnected due to a disaster or the like when the first group setting signal is transmitted, or the power source of the receiver is Even if it is OFF, the transmission line may be restored or the receiver power may be ON when sending the group setting signal for the second and subsequent times. Compared with the case where the group setting signal is transmitted only once, the reliability of the group setting can be improved.

  In addition, according to the announcement broadcasting system of claim 2, according to the importance level, such as setting the group having a higher importance level so that the transmission of the group setting signal is repeated at a narrower interval and a larger number of times. The group setting signal can be transmitted repeatedly at regular intervals or the number of times, so that the possibility of adversely affecting the announcement broadcast by the group setting signal is reduced and the certainty of the group setting can be further improved according to the importance. It becomes possible.

  In addition, according to the notification broadcasting system according to claim 3, according to the transmission time, such as setting so that the transmission is repeated at a narrow interval and a large number of times in a time zone when the general notification broadcasting is small. Since group setting signal transmission can be repeated at intervals or times, it is possible to further improve the reliability of group setting according to the transmission time while reducing the possibility of adversely affecting the announcement broadcast by the group setting signal. It becomes.

  Embodiments of a notification broadcasting system according to the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited by this embodiment.

(Constitution)
First, the configuration of the notification broadcasting system according to this embodiment will be described. FIG. 1 is a block diagram showing a configuration of a notification broadcasting system according to the present embodiment. As shown in FIG. 1, the notification broadcasting system 1 transmits a center device 10 disposed on the center side, a receiver 20 disposed in each dwelling unit, and a signal transmitted from the center device 10 to the receiver 20. A transmission system 40 is provided. In addition, except the structure which mentions specially, the center apparatus 10, the receiver 20, and the transmission system 40 can be comprised similarly to the conventional notification broadcasting system.

(Configuration-Center device)
Among these, the center apparatus 10 transmits an announcement broadcast signal, and corresponds to the transmission means in the claims. The center device 10 includes an operation unit 11, a display unit 12, a microphone 13, a BGM source 14, a memory 15, a timer circuit 16, a transmission unit 17, and a control unit 18.

  The operation unit 11 is an operation unit for performing various operations on the center device 10 and includes, for example, various switches (not shown). The display unit 12 is a display unit for displaying necessary information toward the operator, and includes, for example, a monitor and a display lamp (not shown). The microphone 13 is a voice input means for inputting voice for announcement broadcasting. The BGM source 14 is sound source means that becomes a sound source of background music for announcement broadcasting. The time measuring circuit 16 outputs the current time and corresponds to the time measuring means in the claims. The transmission unit 17 is a transmission unit that transmits the notification broadcast signal to the head end 41.

  The memory 15 records information necessary for various controls of the center device 10, and particularly stores a group setting table for setting a group address. Corresponding to Although the specific configuration of the memory 15 is arbitrary, for example, a RAM (Random Access Memory) or a flash memory can be used. Here, the “group address” is an address for performing group broadcasting, and is identification information for uniquely identifying a group that divides the receiving means. The “individual address” described later is identification information for uniquely identifying each receiver 20.

  FIG. 2 shows a configuration example of the group setting table. In this group setting table, items of “time”, “importance”, “transmission interval”, and “number of transmissions” and information preset for each of these items are stored in association with each other. ing. Information corresponding to the item “time” is information for distinguishing a transmission time zone when transmitting a group setting signal for setting a group address. Here, “8: 0 to 21:00” and “ It is divided into two time zones of “21:00 to 8:00”. The information corresponding to the item “importance” is importance information for specifying the importance for each group address, and is divided into two levels, “1” and “2” (this embodiment) Then, it is assumed that importance = 2 is more important than importance = 1). The information corresponding to the item “transmission interval” is information for specifying a predetermined interval for transmitting the group setting signal. For example, when “60” is indicated, the group setting signal is transmitted once every 60 minutes. means. The information corresponding to the item “number of transmissions” is information for specifying a predetermined number of times of transmitting the group setting signal. For example, when “3” is indicated, it means that the group setting signal is transmitted three times in total. .

  The control unit 18 is a control unit that controls each unit of the center device 10, and includes, for example, a CPU (Central Processing Unit) (not shown) and a program that is interpreted and executed on the CPU (control unit 30). The same). The control unit 18 includes a group setting control unit 18a in terms of functional concept. The group setting control unit 18a sends a group setting signal including a group address for uniquely identifying a group that divides the receiver 20 and a control command for instructing setting of the group address via the transmission system 40. This is transmitted to the receiver 20, and corresponds to the transmission side group setting control means in the claims. Specific functions of the group setting control unit 18a will be described later.

(Configuration-Receiver)
Next, the receiver 20 of FIG. 1 will be described. The receiver 20 receives the notification broadcast signal and outputs the notification broadcast, and corresponds to the receiving means in the claims. The receiver 20 includes a demodulating unit 21, an audio switching unit 22, an audio recording unit 23, a volume adjusting unit 24, an amplifier 25, a speaker 26, an operation unit 27, a display unit 28, a memory 29, and a control unit 30. Has been.

  The demodulation unit 21 is a notification broadcast demodulation unit that demodulates the notification broadcast signal transmitted from the center device 10, and outputs audio information to the audio switching unit 22 and outputs control information to the control unit 30. The audio switching unit 22 outputs the audio information output from the demodulation unit 21 to the audio recording unit 23 or the volume adjustment unit 24, or outputs the audio information output from the audio recording unit 23 to the volume adjustment unit 24. Switching means. The voice recording unit 23 is voice information storage means for recording voice information a predetermined number of times. The volume adjusting unit 24 adjusts the volume of the audio information output from the audio switching unit 22 and outputs it to the amplifier 25. The audio information is amplified by the amplifier 25 and then output from the speaker 26. The speaker 26 is reproduction means for reproducing the audio information recorded by the audio recording unit 23. The operation unit 27 is an operation unit for performing various operations on the receiver 20. The display unit 28 is display means for displaying required information to the user.

  The memory 29 is a recording unit that records information necessary for various controls of the receiver 20. Although the specific configuration of the memory 29 is arbitrary, the memory 29 is configured using a rewritable recording medium. For example, a nonvolatile storage medium such as a flash memory can be used. In particular, the individual address is stored in the memory 29 in advance by an arbitrary method before the receiver 20 is shipped from the factory, and the group address is stored by a group setting process described later.

  The control unit 30 is a control unit that controls each unit of the receiver 20. The control unit 30 includes a group setting control unit 30a in terms of functional concept. When the group setting control unit 30a receives a group setting signal transmitted from the center apparatus 10 via the transmission system 40, the group setting control unit 30a is instructed to set a group address by a control command included in the group setting signal. The group address included in the group setting signal is stored in the memory 29 of the receiver 20 as the group address of the group to which the receiver 20 belongs. Corresponding to Specific functions of the group setting control unit 30a will be described later.

  FIG. 3 is a front view of the receiver 20. The receiver 20 is configured by accommodating each part of the receiver 20 described above except for the operation unit 27 and the display unit 28 in a rectangular box-shaped housing. Specifically, the operation unit 27 includes an FM broadcast selection switch 27a for selecting an FM broadcast, an announcement reproduction switch 27b for instructing reproduction of a recorded announcement broadcast, and a volume for adjusting the broadcast volume. A switch 27c is provided. Specifically, the display unit 28 includes a power indicator lamp 28a that is turned on when the power is turned on, an emergency broadcast indicator lamp 28b that is lit or blinked during emergency broadcasting, and a general broadcast indicator lamp 28c that is lit or blinked during ordinary broadcasting.

(Configuration-Transmission system)
Returning to FIG. 1, the transmission system 40 includes a head end 41, a transmission line 42 extending from the head end 41 to the receiver 20 of each dwelling unit, and an amplifier 43, a distribution amplifier 44, a distribution disposed in the transmission line 42. A device 46 and a protector 48 are provided. The head end 41 is an amplification transmission unit that receives a signal transmitted from the transmission unit 17 of the center device 10, level-amplifies this signal, and sends it to the transmission line 42. The transmission line 42 is a transmission line that transmits a notification broadcast signal. For example, a CATV transmission line (coaxial cable) that transmits a CATV signal is used. The amplifier 43 is an amplifying unit that amplifies a signal flowing through the transmission line 42. The distribution amplifier 44 is distribution amplification means for amplifying a signal and distributing the amplified signal to each dwelling unit. The distributor 46 is distribution means for distributing the signal amplified by the distribution amplifier 44 toward each dwelling unit. The protector 48 is provided in each dwelling unit and controls a DC component that reaches the receiver 20 on the transmission line 42.

(Processing-Notification broadcast processing)
Next, notification broadcast processing in the notification broadcast system 1 configured as described above will be described. First, the notification broadcast process in the center apparatus 10 will be described. FIG. 4 is a flowchart of notification broadcast processing in the center apparatus 10. The operator on the center side inputs arbitrary audio information using the microphone 13 and the BGM source 14 of the center apparatus 10 in FIG. At this time, the operator uses the operation unit 11 to specify whether the notification broadcast is a general broadcast or an emergency broadcast, and when the broadcast is a general broadcast, inputs the scheduled broadcast date and time. General broadcast is a method that does not require urgency, for example, local event information or regular broadcast, and emergency broadcast is a broadcast that requires urgency, for example, disaster information. Further, the operator designates at least one of the individual address and the group address in order to designate the receiver 20 as the reception destination using the operation unit 11.

  The control unit 18 of the center apparatus 10 that has received these various inputs (Step SA-1, Yes) determines whether the notification broadcast is a general broadcast or an emergency broadcast based on the content specified by the operator (Step S1). SA-2) When it is determined that the broadcast is an emergency broadcast (step SA-2, Yes), the individual address or group address of the receiver 20 designated by the operator and the information specifying the emergency broadcast Is generated (step SA-3). The broadcast command and the audio information input by the operator are modulated on a carrier having a predetermined frequency to generate a notification broadcast signal. The notification broadcast signal is transmitted to the head end 41 via the transmission unit 17. Transmit (step SA-4).

  On the other hand, if it is determined that the broadcast is a general broadcast (step SA-2, No), the control unit 18 includes the individual address or group address of the receiver 20 designated by the operator and information for identifying the general broadcast. Is generated (step SA-5). Then, the broadcast command and the audio information input by the operator are recorded in the memory 15 (step SA-6). Thereafter, the control unit 18 monitors whether or not the scheduled broadcast date and time designated by the operator has arrived based on the current time from the timing circuit 16 (step SA-7), and when the scheduled broadcast date and time has arrived. (Step SA-7, Yes), the broadcast command and audio information are acquired from the memory 15. Then, the control unit 18 generates a notification broadcast signal by modulating the broadcast command and the audio information on a carrier having a predetermined frequency, and transmits the notification broadcast signal to the head end 41 via the transmission unit 17. (Step SA-4). Thus, the notification broadcast process in the center device 10 is completed.

  Next, notification broadcast processing in the receiver 20 will be described. FIG. 5 shows a flowchart of notification broadcast processing in the receiver 20. The head end 41 that has received the notification broadcast signal transmitted from the center device 10 by the above-described processing transmits the notification broadcast signal via the transmission line 42. The notification broadcast signal transmitted in this way is amplified or distributed by the amplifier 43, the distribution amplifier 44, or the distributor 46, and then arrives at the protector 48 of each dwelling unit and passes through the protector 48. A signal is input to the receiver 20 (the same applies to transmission of a group setting signal in a group setting process described later).

  In the receiver 20, the input notification broadcast signal is demodulated by the demodulation unit 21 (step SB- 1), the broadcast command is input to the control unit 30, and the audio information is adjusted in volume via the audio switching unit 22. Are output to the unit 24 and the audio recording unit 23. The control unit 30 determines whether or not the address included in the broadcast command matches its own individual address or group address recorded in advance in the memory 29 (step SB-2). In step SB-2, No), the notification broadcast process is terminated, and if they match (step SB-2, Yes), a control signal is output to the audio switching unit 22 so that audio information is output. The voice switching unit 22 that has received this control signal outputs the demodulated voice information to the volume adjusting unit 24. The audio information is output from the speaker 26 after volume adjustment by the volume adjustment unit 24 and amplification by the amplifier 25.

  At this time, the control unit 30 determines whether or not the broadcast command indicates that the notification broadcast is an emergency notification broadcast (step SB-3), and if it is an emergency notification broadcast (step SB- 3, Yes), the emergency broadcast indicator lamp 28b is turned on or blinked, and the sound volume information is output at a predetermined high volume for emergency notification broadcasting by controlling the volume adjusting unit 24 (step SB-4). On the other hand, when the broadcast command indicates that the notice broadcast is a general notice broadcast (step SB-3, No), the control unit 30 turns on or blinks the general broadcast indicator lamp 28c and sets the volume. By controlling the adjustment unit 24, the audio information is output at the volume set by the volume switch (step SB-5).

  After the output control is performed as described above, the control unit 30 records the audio information by the audio recording unit 23 (step SB-6). Thereafter, when the user gives a reproduction instruction via the notification reproduction switch 27b at an arbitrary timing (step SB-7, Yes), the control unit 30 converts the audio information recorded by the audio recording unit 23 into an audio switching unit. 22 is output to the volume adjusting unit 24 via the speaker 22 and output from the speaker 26 (step SB-8). This completes the notification broadcast process in the receiver 20.

(Processing-Group setting processing)
A group process for setting a group address from the center apparatus 10 to the receiver 20 will be described. First, the group setting process in the center device 10 will be described. FIG. 6 is a flowchart of the group setting process in the center apparatus 10. The operator on the center side uses the operation unit 11 of the center device 10 to input the fact that the group address is to be set, the individual address of the receiver 20 to be set as the group address, and the group address to be newly set. . For example, the group address can be set up to 1000 groups, and the group address to be set is input as “group address = GP001”.

  When the group setting control unit 18a of the center device 10 receives an input from these operators (step SC-1, Yes), the group setting control unit 18a obtains the current time from the timer circuit 16 (step SC-2), A predetermined transmission interval and a predetermined number of transmissions corresponding to the importance of the group address to be set are acquired from the group setting table stored in the memory 15 (step SC-3). As a method for specifying the importance at this time, for example, (1) a method of allowing the operator to input the importance using the operation unit 11 when inputting a group address or the like, or (2) the type and importance of the group. Is stored in the memory 15 in advance (for example, when the group type = “Geriatric Association”, importance = 1, and when the group type = “Firefighter”). Importance = 2), a method of causing an operator to input a group type using the operation unit 11 when inputting a group address or the like, and acquiring the importance corresponding to the input group type from the importance table Can be mentioned.

  In the example of FIG. 2, at least two (plural) times are set as the number of transmissions in any combination of importance and time. Therefore, in step SC-5, which will be described later, the group setting signal is transmitted at least twice (multiple times), so that the group setting is more reliable than when relying on only one transmission as in the prior art. Can be improved.

  Here, from the viewpoint of the reliability of the group setting, it is considered that the shorter the transmission interval of the group setting signal (the higher the frequency of transmission) and the higher the number of transmissions of the group setting signal, the better. However, if the transmission interval is too short or the number of transmissions is too large, there is a concern that adverse effects may occur such as an obstacle to notification broadcasting. For this reason, in the example of FIG. 2, the interval or the number of times is set to be different according to the “importance”. Specifically, the higher the importance (when importance = 2 than importance = 1), the narrower interval (that is, the higher frequency), and the transmission is set to be repeated a large number of times. . As a result, it is possible to further improve the reliability of group setting for a higher importance group.

  In the example of FIG. 2, the interval or the number of times is set to be different depending on the time. Specifically, the night time zone (21:00 to 8:00) is transmitted at a narrower interval (ie, higher frequency) and more times than the daytime zone (8:00 to 21:00). Is set to repeat. As a result, the group setting signal is transmitted frequently and frequently in the nighttime when there are few general announcement broadcasts. By repeating the signal a plurality of times at a minimum, it is possible to reduce the possibility of obstructing general announcement broadcasting.

  Next, the group setting control unit 18a generates a group setting signal including the individual address and group address input in step SC-1 and a control command instructing setting of the group address (step SC-4). This group setting signal is transmitted to the receiver 20 via the transmission line 42 (step SC-5). Thereafter, the number of times the group setting signal is transmitted (hereinafter referred to as “actual transmission count”; initial value = 0) is incremented by 1 (step SC-6) until the actual transmission count reaches the transmission count acquired in step SC-3. (Step SC-7) Each time the transmission interval acquired in Step SC-3 elapses (Step SC-8), the group setting signal is repeatedly transmitted (Step SC-5). Thereafter, the processing from step SC-5 to SC-8 is repeated, and when the actual number of transmissions reaches the number of transmissions acquired in step SC-3 (step SC-7, Yes), group setting processing in the center device 10 Exit.

  Finally, the group setting process in the receiver 20 will be described. FIG. 7 is a flowchart of the group setting process in the receiver 20. When the group setting control unit 30a of the receiver 20 receives an input of the group setting signal (step SD-1, Yes), the group setting control unit 30a executes the group setting process based on the control command included in the group setting signal. Specifically, the group setting control unit 30a determines whether or not the individual address included in the group setting signal matches the individual address set in advance in the memory 29 (step SD-2). (Step SD-2, No), the group setting process is terminated, and if they match (step SD-2, Yes), the group address included in the group setting signal is set in the memory 29 as its own group address. (Step SD-3). This completes the group setting process in the receiver 20.

  After that, when a notification broadcast signal including the group address set in this way is transmitted from the center apparatus 10 to the receiver 20, in the notification broadcast processing of the receiver 20, in the step SB-2 of FIG. It is determined that the group address set to match the group address included in the notification broadcast signal, and the notification broadcast using the notification broadcast signal is performed in the receiver 20.

(Effect of embodiment)
Thus, according to the present embodiment, since the group setting signal is transmitted a plurality of times, the transmission line 42 is disconnected due to a disaster or the like when the first group setting signal is transmitted, or the power source of the receiver 20 is turned off. Even when it is OFF, the transmission line 42 may be restored or the power of the receiver 20 may be ON when transmitting the group setting signal for the second and subsequent times. The reliability of group setting can be improved as compared with the case where the group setting signal is transmitted only once.

  Also, repeat the group setting signal transmission at intervals or the number of times according to the importance, such as setting the group with a higher importance, so that the transmission of the group setting signal is repeated at a narrower interval and more times. Therefore, it is possible to further improve the certainty of the group setting according to the importance while reducing the possibility of adversely affecting the notification broadcast by the group setting signal.

  In addition, the transmission of the group setting signal may be repeated at an interval or the number of times according to the transmission time, such as setting the transmission to be repeated at a narrow interval and a large number of times in a time zone where the general announcement broadcast is small. Therefore, it is possible to further improve the reliability of the group setting according to the transmission time while reducing the possibility that the notification broadcast is adversely affected by the group setting signal.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. it can. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(About setting of transmission interval and number of transmissions)
In the above embodiment, the transmission interval and the number of transmissions of the group setting signal are set according to the importance level of the group and the transmission time of the group setting signal. The group setting signal may be transmitted at a predetermined transmission interval or number of transmissions. Also, setting is made according to one of the importance of the group and the transmission time of the group setting signal, or only one of the transmission interval and the number of transmissions of the group setting signal is set, and the other is a predetermined uniform amount. It may be a set value.

  In addition, the transmission interval and the number of transmissions may be adjusted using a standard other than the importance level and the transmission time. For example, emergency broadcasting is often performed when a disaster occurs, and when emergency broadcasting is performed, there is a high possibility that the transmission line 42 is disconnected due to the disaster. In this case, when the group setting process is instructed within a predetermined date and time after the emergency broadcast (for example, within one week), the group setting signal may not be correctly transmitted due to the disconnection of the transmission line 42. Compared to the case where the group setting process is instructed after the predetermined date and time, the transmission interval of repeated transmission of the group setting signal may be narrowed or the number of transmissions may be increased. Specifically, when it is determined that the emergency broadcast is performed in Step SA-2 in FIG. 4, the control unit 18 acquires the time when the emergency broadcast is performed from the time measuring circuit 16 and stores the time in the memory 15. When the group setting control unit 18a receives an input from the operator in step SC-1 in FIG. 6, the group setting control unit 18a acquires the current time from the timer circuit 16, and the current time is predetermined from the time stored in the memory 15. It is determined whether it is within the date and time, and the transmission interval and the number of transmissions are determined according to the determination result. Further, since the transmission line 42 may be disconnected or a power failure may occur, all groups may be retransmitted and set every predetermined period (for example, every week or every month). In addition, when an announcement broadcast to be broadcast during the transmission of the group setting signal is received, the announcement broadcast may be given priority, and the group setting signal transmission time may be shifted and retransmitted.

It is a block diagram which shows the structure of the notification broadcasting system which concerns on one embodiment of this invention. It is a figure which shows the structural example of a group setting table. It is a front view of a receiver. It is a flowchart of the notification broadcast process in a center apparatus. It is a flowchart of the notification broadcast process in a receiver. It is a flowchart of the group setting process in a center apparatus. It is a flowchart of the group setting process in a receiver.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Notification broadcast system 10 Center apparatus 11, 27 Operation part 12, 28 Display part 13 Microphone 14 BGM source 15, 29 Memory 16 Timekeeping circuit 17 Transmission part 18, 30 Control part 18a, 30a Group setting control part 20 Receiver 21 Demodulation part 22 audio switching unit 23 audio recording unit 24 volume adjusting unit 25, 43 amplifier 26 speaker 27a FM broadcast selection switch 27b notification reproduction switch 27c volume switch 28a power indicator 28b emergency broadcast indicator 28c general broadcast indicator 40 transmission system 41 head end 42 transmission line 44 distribution amplifier 46 distributor 48 protector

Claims (3)

A notification broadcast system for receiving a notification broadcast signal transmitted from a transmission means by a reception means via a transmission line, and performing a notification broadcast based on the notification broadcast signal by the reception means,
The transmitting means receives the group setting signal including a group address for uniquely identifying a group that divides the receiving means and a control command instructing setting of the group address via the transmission line. A transmission side group setting control means for transmitting to the means,
When the receiving unit receives the group setting signal transmitted from the transmitting unit via the transmission line, the group address setting is instructed by the control command included in the group setting signal. Includes a receiving-side group setting control means for storing the group address included in the group setting signal as a group address of a group to which the receiving means belongs in a storage means of the receiving means,
The transmitting-side group setting control means of the transmitting means repeatedly transmits the same group setting signal a plurality of times;
Announcement broadcasting system characterized by The transmission means includes a transmission side storage means for storing importance information for specifying importance for each group address,
The transmission side group setting control means of the transmission means transmits the group setting signal at a predetermined interval or a predetermined number of times according to the importance level specified by the importance level information stored in the transmission side storage means. To do,
The notice broadcast system according to claim 1. The transmitting means includes a time measuring means for acquiring a current time,
The transmitting-side group setting control means of the transmitting means transmits the group setting signal at a predetermined interval or a predetermined number of times according to the current time acquired by the time measuring means;
The notice broadcast system according to claim 1 or 2.

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