JP4610390B2 - Notification broadcasting system - Google Patents

Description

  The present invention relates to a notification broadcasting system that performs various types of notification broadcasting from a center to a terminal, and more particularly to a notification broadcasting system in which a frequency for communication can be easily changed.

2. Description of the Related Art Conventionally, an announcement broadcasting system used in an apartment house or a detached house uses a center device having a notification broadcast transmission function and an announcement broadcast receiver provided in each apartment house on the terminal side using, for example, a CATV line. Connected and configured. Various notification broadcasts are performed from the center device to the notification broadcast receiver. Notification broadcasts include emergency broadcasts that have urgency for emergency evacuation and disaster prevention such as natural disasters and fires, general announcement broadcasts that do not require urgency, such as communication and guidance for events, and by school / There are types such as group announcement broadcasts that select groups and perform announcement broadcasts such as contact by circle. Here, communication between the center device and the notification broadcast receiver is performed at a predetermined frequency set in advance in the center device and the notification broadcast receiver. As such an announcement broadcasting system, there is a system described in Patent Document 1, for example.
Japanese Patent Laid-Open No. 9-8753

  However, it may be necessary to change the frequency used for communication between the center apparatus and the notification broadcast receiver. For example, when the district where the announcement broadcast is performed and the district where the announcement broadcast is merged, the announcement broadcast was performed in the district where the announcement broadcast was not performed when the announcement broadcast was performed in any district If the frequency used by is already used, the frequency cannot be used, so the frequency needs to be changed.

  When changing the frequency of notification broadcasting, it is necessary to change the frequency settings of both the transmitter of the center device and the notification broadcasting receiver. However, in the past, the frequency is set in advance, and subsequent changes are considered. It was necessary to replace the equipment to change the frequency. Since there is only one or several transmitters in the center device, it does not require much cost to replace it. However, the notification broadcast receiver is provided in each household, and since the number is large, the device is replaced. Requires a lot of cost and effort.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a notification broadcast system that can easily and inexpensively change the frequency setting of a notification broadcast receiver.

In order to solve the above-described problems, a notification broadcasting system according to the present invention includes a notification device configured by connecting a center device having a notification broadcast transmission function and a notification broadcast receiver for receiving notification broadcasts from the center device. In the broadcasting system,
The center device transmits a notification broadcast to the notification broadcast receiver at a predetermined transmission frequency, and a center device control unit that controls the notification broadcast transmission unit and generates transmission frequency setting data. Have
The notification broadcast receiver receives a notification broadcast to the reception unit at a reception unit that receives the notification broadcast, a frequency storage unit that stores the same reception frequency as the transmission frequency, and a reception frequency stored in the frequency storage unit. And a receiver control unit
When the center device control unit generates and transmits the setting data of the transmission frequency, the receiving unit of the notification broadcast receiver receives the setting data, and the receiver control unit uses the frequency of the received setting data as a reception frequency. It is configured to be stored in the frequency storage unit.

  Further, in the notification broadcast system according to the present invention, the center device includes a plurality of the notification broadcast transmission units, and each notification broadcast transmission unit transmits the notification broadcast to the notification broadcast receiver at different transmission frequencies, and The center device control unit is configured to generate the transmission frequency setting data for each notification broadcast transmission unit.

Further, in the notification broadcasting system according to the present invention, the frequency storage unit of the notification broadcast receiver stores the same reception frequency as a plurality of transmission frequencies used by the notification broadcast transmission units, and the receiver control unit stores the frequency storage. When the reception frequency is received by the reception unit by switching a plurality of reception frequencies stored in the unit, and the setting data of the transmission frequency is received, the corresponding notification broadcast transmission unit stored in the frequency storage unit Therefore, the reception frequency is rewritten.
Furthermore, in the notification broadcasting system according to the present invention, when the center device control unit does not know which frequency the notification broadcast receiver can receive, the center device control unit transmits the above-mentioned information from all of the plurality of notification broadcast transmission units. The transmission frequency setting data is transmitted.

  Furthermore, in the notification broadcast system according to the present invention, a predetermined time elapses after the receiver control unit of the notification broadcast receiver receives the transmission frequency setting data from the center device and stores it in the frequency storage unit. When the notification broadcast is not received from the center device, the reception frequency stored in the frequency storage unit is rewritten so as to return to the previous value.

  According to the notification broadcast system of the present invention, the center device has a center device control unit capable of generating transmission frequency setting data, and the notification broadcast receiver has a frequency storage unit that stores the reception frequency. When the control unit generates and transmits the setting data of the transmission frequency, the receiving unit of the notification broadcast receiver receives the setting data, and the receiver control unit stores the frequency of the received setting data as the reception frequency in the frequency storage unit. Since the set frequency of the notification broadcast receiver can be changed from the center device, the frequency setting of the notification broadcast receiver can be changed easily and at low cost.

  Further, according to the notification broadcast system of the present invention, the center device has a plurality of notification broadcast transmission units, and each notification broadcast transmission unit transmits the notification broadcast to the notification broadcast receiver at different transmission frequencies, and controls the center device. Since the transmission unit can generate transmission frequency setting data for each notification broadcast transmission unit, the transmission frequency can be set for each frequency even when data is transmitted using a plurality of frequencies.

  Furthermore, according to the notification broadcast system of the present invention, the frequency storage unit of the notification broadcast receiver stores the same reception frequency as the plurality of transmission frequencies used by each notification broadcast transmission unit, and the receiver control unit sets the transmission frequency. When data is received, by rewriting the reception frequency for the corresponding notification broadcast transmission unit stored in the frequency storage unit, when using a plurality of frequencies, the setting of the notification broadcast receiver for each frequency The frequency can be changed.

  Furthermore, according to the notification broadcast system of the present invention, the receiver control unit of the notification broadcast receiver stores the transmission frequency setting data in the frequency storage unit, and then notifies the center device until a predetermined time elapses. When the broadcast is not received, the received frequency stored in the frequency storage unit is restored to the value before rewriting, so that even if the frequency setting fails for some reason, the original state is restored. Broadcast reception can be performed.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a notification broadcasting system in the present embodiment. First, the system configuration in this embodiment will be described. The signal line 1 is a transmission line used for communication between the center side and the terminal side. In this embodiment, a coaxial cable of a CATV system is used. For this reason, a head end 2 is provided on the center side, and a television signal is transmitted from the head end 2 to the terminal side. On the signal line 1, a transmission signal amplifier 29 is provided as appropriate for amplifying the transmission signal. A center device 3 is provided on the center side, which is the head end 2 side, and a plurality of notification broadcast receivers 16 and 16 are connected to the terminal side of the transmission line 1 via branch terminals of the branching device 15.

  The center device 3 includes a control unit 4 that performs data processing and data transmission control, and a notification broadcast transmission unit 12 that transmits a notification broadcast to each notification broadcast receiver 16 based on data from the control unit 4. The The control unit 4 is connected to a display 9, a printer 10, a keyboard 11, and the like for setting broadcast signals. Audio signals from the microphone 13 and the BGM source 33 are transmitted to the notification broadcast transmission unit 12 and FM-modulated. An output from the notification broadcast transmission unit 12 is given to the transmission line 1 via the head end 2.

  Here, the control unit 4 can also transmit a broadcast signal from an audio device such as a tape recorder in addition to an audio signal from the microphone 13 or the BGM source 33. Alternatively, character data input from the keyboard 11 and displayed on the display 9 can be encoded and transmitted as a broadcast signal. Furthermore, image data based on video input through the display 9 can be appropriately encoded and transmitted as a broadcast signal.

  The notification broadcast transmitted from the control unit 4 includes audio data broadcast on the speaker of the notification broadcast receiver 16, type data including the type of notification broadcast and terminal information targeted for the notification broadcast, Control information such as termination is included. At this time, the transmission start or broadcast end time of the notification broadcast is read from the calendar circuit 37 and transmitted by voice at the beginning or end of the voice information of the notification broadcast. The calendar circuit 37 may be provided on the notification broadcast receiver 16 side.

  The control information such as type data is set by operating the keyboard 11, and first, it is set whether the notification broadcast to be transmitted is an emergency notification broadcast or a general notification broadcast. Next, the address of the terminal device that is the target of the announcement broadcast is specified. The address designation includes all terminal designation for designating all participating terminals, group designation for designation in units of service areas and apartments, and individual designation for designating individual terminals. The type data added to the announcement broadcast includes an area for specifying a group address, an area for specifying an individual address, and an area for specifying a data type.

  Announcement broadcasts include emergency broadcasts for emergency notification broadcasts to all subscriber terminals, general broadcasts for general announcement broadcasts to all subscriber terminals, emergency group broadcasts for emergency notification broadcasts on a group basis, and general announcement broadcasts on a group basis. General group broadcasts, emergency individual broadcasts for emergency notification broadcasts to individual terminals, and general individual broadcasts for general notification broadcasts to individual terminals. The emergency notification broadcast is more important than the general announcement broadcast, and the broadcast is more important than the group broadcast or individual broadcast.

  The control unit 4 is also connected to a general telephone network 50, and at a specified time by registering the broadcast date / time, notification contents, broadcast group, etc. in advance from a telephone 51 such as a general home phone or a mobile phone. Announcement broadcasting can be performed automatically.

  Two notification broadcast transmission units 12 are provided, and each transmits a notification broadcast from the control unit 4 to the signal line 1. The notification broadcast transmission unit 12 transmits the notification broadcast using different transmission frequencies. The frequency used by each notification broadcast transmission unit 12 is set in advance in the notification broadcast transmission unit. The control unit 4 transmits a notification broadcast in which a specific group is designated as a group from one notification broadcast transmission unit 12 at a predetermined transmission frequency, and transmits a notification broadcast in which another group is designated as a group to the other notification broadcast transmission unit. 12 can be transmitted at a predetermined transmission frequency.

  Next, the notification broadcast receiver 16 provided at the terminal of the transmission line 1 will be described. FIG. 2 shows a block diagram of the notification broadcast receiver 16. As shown in this figure, the notification broadcast receiver 16 is controlled based on the demodulation unit (reception unit) 22 that receives and demodulates the notification broadcast transmitted from the center device 3 and the control information included in the demodulated notification broadcast. A microcomputer (receiver control unit) 17 is provided. As an output unit for audio information demodulated by the demodulation unit 22, an audio amplifier 24 that amplifies audio information and a speaker 25 are provided, and a volume from the speaker 25 is adjusted in front of the audio amplifier 24. A volume adjusting unit 28 is provided.

  Further, the notification broadcast receiver 16 is provided with an audio memory 31 that stores audio information of the received notification broadcast, and a recording unit 30 that stores the notification broadcast in the audio memory 31. When the demodulator 22 receives the broadcast start data included in the control information from the center device 3, the recording unit 30 receives a recording operation command signal from the microcomputer 17. Then, a recording process for converting the sound information of the announcement broadcast output from the demodulator 22 into sound data and storing it in the sound memory 31 is performed.

  The audio memory 31 is divided into a plurality of memory areas corresponding to various types of announcement broadcasting. The microcomputer 17 stores the notification broadcast in each area of the audio memory 31 according to the type of the notification broadcast from the center device 3.

  Further, a memory (frequency storage unit) 40 is connected to the microcomputer 17. The memory 40 stores the control information and the correspondence between the control information and the audio information, and is used for reproducing, recording, and deleting the notification broadcast. The memory 40 stores two transmission frequencies used by the notification broadcast transmission unit 12 of the center device 3, and the microcomputer 17 receives the notification broadcast to the demodulation unit 22 using the frequency stored in the memory 40 as the reception frequency. Let

  On the other hand, the control unit 4 of the center device 3 can generate setting data including only control information for changing the frequency received by the notification broadcast receiver 16. In order to change the frequency, it is necessary to change the frequency setting of the notification broadcast transmission unit 12 of the center device 3 and the frequency setting of all the notification broadcast receivers 16. Among these, there are two notification broadcast transmission units 12 of the center apparatus 3 in the present embodiment. Therefore, when changing the frequency, the devices are exchanged and the notification broadcast transmission unit 12 corresponding to the new frequency is used.

  The notification broadcast receiver 16 changes the setting of each device based on the setting data generated by the control unit 4 of the center device 3. The procedure is as follows. First, the new frequency received for each individual address or group address is input using the keyboard 11 of the center device 3. The control unit 4 of the center device 3 generates frequency setting data based on the input new frequency, and transmits the frequency setting data to the terminal to be changed at a frequency that can be currently received. The setting data has the same format as the control information included in the notification broadcast. The control information has a data area indicating the presence / absence of frequency setting. If the data with frequency setting is included in the control information, the microcomputer 17 of the notification broadcast receiver 16 uses the data as frequency setting data. If it is recognized and data without frequency setting is included, the microcomputer 17 of the notification broadcast receiver 16 recognizes the data as control information included in the normal notification broadcast. If the notification broadcast receiver 16 does not know which notification broadcast transmission unit 12 can currently receive the frequency, the control unit 4 transmits frequency setting data from both of the two notification broadcast transmission units 12. By doing so, the notification broadcast receiver 16 to be changed can reliably receive the setting data.

  When the notification broadcast receiver 16 receives the frequency setting data and recognizes that the microcomputer 17 is the setting data, the microcomputer 17 stores the new frequency in the memory 40. At this time, based on data designating which of the two notification broadcast transmission units 12 and 12 is used, the corresponding frequency is rewritten to a new frequency.

  When the frequency stored in the memory 40 is rewritten, the notification broadcast receiver 16 switches the new frequency as the reception frequency, and the broadcast is performed based on the notification broadcast transmitted at the new frequency. Thus, since the reception frequency of the notification broadcast receiver 16 can be changed from the center apparatus 3, the frequency setting of the notification broadcast receiver 16 can be changed easily and at low cost. Even if the center device 3 has a plurality of notification broadcast transmission units 12, the control unit 4 of the center device 3 can generate setting data for each notification broadcast transmission unit 12 and transmit it to the notification broadcast receiver 16. . Accordingly, a plurality of notification broadcasts can be transmitted simultaneously by the number of notification broadcast transmission units 12, and the reception frequency of the notification broadcast receiver 16 from the center device 3 according to the area, group, terminal unit or the like to be broadcasted. Can be changed and set as appropriate to simultaneously broadcast announcement broadcasts.

  On the other hand, there may be a case where the frequency setting fails for some reason. In this case, communication with the center device 3 cannot be performed after the frequency is rewritten. Therefore, when receiving the setting data for setting a new frequency, the microcomputer 17 of the notification broadcast receiver 16 rewrites the memory 40 while keeping the original frequency data. Then, the microcomputer 17 rewrites the memory 40 so as to return to the original frequency when no notification broadcast is received from the center apparatus 3 for a predetermined time or more.

  In this way, by returning the frequency setting to the original after a predetermined time has elapsed, even if the frequency setting fails, it is possible to reliably receive the notification broadcast thereafter.

  Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be variously applied within the scope of the technical idea. For example, the number of notification broadcast transmission units 12 is not limited to two, and more may be provided to transmit notification broadcasts at different frequencies.

It is a block diagram which shows the structure of the notification broadcasting system in this embodiment. It is a block diagram which shows the structure of a notification broadcast receiver.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission line 3 Center apparatus 4 Control part 12 Notification broadcast transmission part 16 Notification broadcast receiver 17 Microcomputer 22 Demodulation part 30 Recording means 31 Voice memory 40 Frequency memory

Claims (5)

In a notification broadcast system configured by connecting a center device having a notification broadcast transmission function and a notification broadcast receiver for receiving notification broadcasts from the center device,
The center device transmits a notification broadcast to the notification broadcast receiver at a predetermined transmission frequency, and a center device control unit that controls the notification broadcast transmission unit and generates transmission frequency setting data. A setting unit that performs group designation for addressing the notification broadcast receiver in units of groups or individual designation for individually addressing , and the center device control unit is group-designated or individually designated by the setting unit Add the address of the announcement broadcast receiver to the above setting data,
The notification broadcast receiver receives a notification broadcast to the reception unit at a reception unit that receives the notification broadcast, a frequency storage unit that stores the same reception frequency as the transmission frequency, and a reception frequency stored in the frequency storage unit. And a receiver control unit
When the center device control unit generates and transmits the setting data of the transmission frequency, the receiving unit of the notification broadcast receiver addressed by the setting unit receives the setting data and the receiver control unit receives the setting data. A notification broadcasting system, wherein the frequency storage unit stores the frequency of the set data as a reception frequency.   The center device has a plurality of notification broadcast transmission units, each notification broadcast transmission unit transmits a notification broadcast to the notification broadcast receiver at a different transmission frequency, and the center device control unit is provided for each notification broadcast transmission unit. The notification broadcast system according to claim 1, wherein the transmission frequency setting data can be generated.   The frequency storage unit of the notification broadcast receiver stores the same reception frequency as the plurality of transmission frequencies used by each notification broadcast transmission unit, and the receiver control unit switches the plurality of reception frequencies stored in the frequency storage unit. The reception unit receives the notification broadcast, and when the transmission frequency setting data is received, the reception frequency for the corresponding notification broadcast transmission unit stored in the frequency storage unit is rewritten. The notification broadcasting system according to claim 2. The center device control unit causes the transmission frequency setting data to be transmitted from all of the plurality of notification broadcast transmission units when it is not known which frequency the notification broadcast receiver can receive. The notification broadcasting system according to claim 2 or 3. The receiver control unit of the notification broadcast receiver does not receive the notification broadcast from the center device until a predetermined time elapses after the transmission frequency setting data is received from the center device and stored in the frequency storage unit. If the the announcement broadcast system according to any one of claims 1 to 4, characterized in that rewritten back to the previous value the reception frequency stored in the frequency storage unit.

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