JPH0365855A - Closed area wire communication equipment - Google Patents
Closed area wire communication equipmentInfo
- Publication number
- JPH0365855A JPH0365855A JP20196589A JP20196589A JPH0365855A JP H0365855 A JPH0365855 A JP H0365855A JP 20196589 A JP20196589 A JP 20196589A JP 20196589 A JP20196589 A JP 20196589A JP H0365855 A JPH0365855 A JP H0365855A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- communication
- terminal device
- center device
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 18
- 238000009434 installation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 239000007858 starting material Substances 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ＣＡＴＶや共聴網等の同軸線等で構成した映
像系の有線通信システムにおいて、使用していない空き
チャンネルを利用した閉域有線通信装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a closed-area wired communication device that utilizes unused channels in a video-based wired communication system constructed of coaxial lines such as CATV and public listening networks. Regarding.
従来の技術
従来、この種の有線通信システムは、一つのセンター装
置と、複数の端末装置とで構成されており、同報すなわ
ちセンター装置から複数の端末装置への単方向の通信と
、センター装置の交換機能を介した端末装置相互間の通
信とを行なっている。各端末装置には一つの通信回線が
割り付けられていて、各端末装置が相互通信を行なうと
きには、センター装置に対して対応する端末装置との通
信回線の接続を依頼し、回線確立後に通信を行なう。BACKGROUND OF THE INVENTION Conventionally, this type of wired communication system has been composed of one center device and multiple terminal devices, and has been configured to perform broadcasting, that is, unidirectional communication from the center device to multiple terminal devices, and one-way communication from the center device to multiple terminal devices. Communication between terminal devices is carried out via the exchange function of . One communication line is assigned to each terminal device, and when each terminal device communicates with each other, it requests the center device to connect the communication line with the corresponding terminal device, and after the line is established, communication begins. .
発明が解決しようとする課題
しかしながら、上記従来の閉域有線通信装置では一つの
端末装置が同時に使用できる通信回線は一つであるため
、端末装置間で通信を行なっている時はセンター装置か
ら端末装置に同報を行なうことができなかった。この問
題の解決は、端末相互間で通信を行なっているときに、
通信帯域を分割して使用することにより行なうことがで
きるが、ハードウェアーが大幅に増加するとともに回線
の品質が劣化したり、音質が劣化したりする問題点があ
る。また、通話可能な回線を２回線とすることもできる
が、受信部が２倍必要となり、コストが大幅に増加する
問題点がある。Problems to be Solved by the Invention However, in the conventional closed-area wired communication device described above, each terminal device can use only one communication line at the same time. It was not possible to make a broadcast. The solution to this problem is when communicating between terminals.
This can be done by dividing the communication band and using it, but there are problems in that the hardware increases significantly and the quality of the line and sound quality deteriorates. Furthermore, although it is possible to use two lines on which calls can be made, there is a problem in that twice as many receiving units are required, which significantly increases costs.
本発明は上記問題点を解決するものであり、各端末装置
間で通信を行なっているときにセンター装置からの同報
を回線の品質を劣化することなく低コストで行なうこと
のできる閉域有線通信装置を提供することを目的とする
。The present invention solves the above-mentioned problems, and provides closed-area wired communication that allows broadcasting from a center device to be performed at low cost without deteriorating line quality while communicating between terminal devices. The purpose is to provide equipment.
課題を解決するための手段
本発明は上記目的を連成するために、センター装置に端
末装置から送られてきた上り信号を他の端末装置へ送る
下り信号に変換する混合器に音声帯域以外の同報受信指
令信号を生成して重畳する手段と、端末装置にセンター
から送られてきた信号の中からこの同報受信指令信号を
検出してセンター装置から同報を受けられるように受信
チャンネルを選択制御する手段を備えている。Means for Solving the Problems In order to achieve the above-mentioned objects, the present invention provides a mixer for converting uplink signals sent from terminal devices to downlink signals sent to other terminal devices to the center device, which is equipped with signals other than those in the voice band. A means for generating and superimposing a broadcast reception command signal, and a means for detecting this broadcast reception command signal from among the signals sent from the center to the terminal device, and setting a reception channel so that the terminal device can receive the broadcast from the center device. It is equipped with means for selective control.
作用
したがって本発明によれば、端末装置相互間で通信を行
なっているときにも、回線の品質を劣化させることなく
、シかも設備を増加させることなく低コストでセンター
装置から各端末装置に対し緊急に同報通信を行なうこと
ができる。Therefore, according to the present invention, even when communicating between terminal devices, the center device can communicate with each terminal device at low cost without degrading line quality or increasing equipment. Emergency broadcast communications can be made.
実施例
第１図は本発明の一実施例の構成を示すものである。第
１図において、１１はセンター装置、１２は同軸線等で
構成された伝送媒体、１３．１４．１５．１６は端末装
置である。端末装置の台数は任意に設定することができ
る。Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 11 is a center device, 12 is a transmission medium composed of coaxial lines, etc., and 13, 14, 15, and 16 are terminal devices. The number of terminal devices can be set arbitrarily.
第２図はセンター装置１１の構成を示すもので、２０１
は分岐器、２０２は分離器、２０３は混合器、２０４は
混合信号発生器、２０５はトーンジェネレーター ２０
６は起動器、２０７は結合器である。FIG. 2 shows the configuration of the center device 11.
is a splitter, 202 is a separator, 203 is a mixer, 204 is a mixed signal generator, 205 is a tone generator 20
6 is a starter, and 207 is a coupler.
第３図は端末装置１３から１６の構成を示すもので、３
１は分岐器、３２はマイクロプロセッサ−３３は受信用
シンセサイザー ３４はトーン検出器、３５は送信用シ
ンセサイザー ３６は音声出力、３７は音声入力である
。FIG. 3 shows the configuration of the terminal devices 13 to 16.
1 is a branching device, 32 is a microprocessor, 33 is a receiving synthesizer, 34 is a tone detector, 35 is a transmitting synthesizer, 36 is an audio output, and 37 is an audio input.
次に上記実施例の動作について説明する。第１図におい
て、端末装置１３と１４とが通信を行なうときは、まず
端末装置１３はセンター装置１１に対し伝送媒体１２の
連絡用回線を経由して連絡し、通話回線の割り付けを求
める。センター装置１１はこれを受けて端末装置１３．
１４間に通信回線を割り付ける。これにより端末装置１
３は端末装置１４に対し指示された通信回線を用いて通
信を行なう。Next, the operation of the above embodiment will be explained. In FIG. 1, when terminal devices 13 and 14 communicate, the terminal device 13 first contacts the center device 11 via the communication line of the transmission medium 12 and requests allocation of a communication line. The center device 11 receives this and the terminal device 13.
Allocate a communication line between 14 and 14. As a result, terminal device 1
3 communicates with the terminal device 14 using the designated communication line.
この通信の詳細を第２図および第３図を参照して説明す
る。まず音声人力３７を受けた端末装置１３は、音声入
力３７を送信用シンセサイザー３５の基準周波数で変調
した後、分岐器３１を経由して伝送媒体１２へ送出する
。伝送媒体１２からセンター装置１１の分岐器２０１に
取り込まれた信号２１１は、この信号の中から分離器２
０２により通信用上り信号２１２が抽出される。混合器
２０３は、この抽出された上り信号２１２を混合信号発
生器２０４で生成された混合信号２１５と合成し、下り
信号２１６にする。結合器２０７は、この下り信号２１
６を伝送媒体１２へ送る。The details of this communication will be explained with reference to FIGS. 2 and 3. First, the terminal device 13 that receives the audio input 37 modulates the audio input 37 using the reference frequency of the transmission synthesizer 35, and then sends it out to the transmission medium 12 via the splitter 31. A signal 211 taken in from the transmission medium 12 to the splitter 201 of the center device 11 is selected from among the signals by the separator 2.
02, the communication uplink signal 212 is extracted. The mixer 203 combines the extracted upstream signal 212 with the mixed signal 215 generated by the mixed signal generator 204 to produce a downstream signal 216. The coupler 207 receives this downlink signal 21
6 to the transmission medium 12.
伝送媒体１２を通って端末装置１４に送られてきた下り
信号は、分岐器３１で送信信号と受信信号とに分けられ
る。受信信号は、分岐器３１から受信用シンセサイザー
３３へ送られ、複合化されてマイクロプロセッサ−３３
へ送られ、ここで解析される。マイクロプロセッサ−３
２は、受信用シンセサイザー３２に受信チャンネルを、
また送信用シンセサイザー３５に送信チャンネルを指示
する。受信用シンセサイザー３３は、指示されたチャン
ネルを用いてオーディオプロセッサー等で音声出力３６
に変換して通信を行なう。A downlink signal sent to the terminal device 14 through the transmission medium 12 is separated by a splitter 31 into a transmission signal and a reception signal. The received signal is sent from the splitter 31 to the receiving synthesizer 33, and is complexed and sent to the microprocessor 33.
It is sent to and analyzed here. Microprocessor-3
2, transmits the reception channel to the reception synthesizer 32,
It also instructs the transmission synthesizer 35 to select a transmission channel. The receiving synthesizer 33 outputs audio 36 using an audio processor or the like using the designated channel.
Convert to , and perform communication.
センター装置１１が緊急事態などで各端末装置に対して
同報通信を行なうときは、センター装置１１は、マイク
ロプロセッサ−等で構成された起動器２０６から起動信
号２１３を発してトーンジェネレーター２０５に音声帯
域外の周波数の同報受信指令信号であるトーン信号２１
４を発生させる。トーン信号２１４は、混合信号発生器
２゜４からの混合信号２１５に重畳されて混合器２１５
から下り信号２１６に乗せられ、結合器２０７から伝送
媒体１２へ送られる。When the center device 11 performs broadcast communication to each terminal device in an emergency situation, etc., the center device 11 issues an activation signal 213 from an activation device 206 composed of a microprocessor, etc., and sends an audio signal to the tone generator 205. Tone signal 21 which is a broadcast reception command signal of a frequency outside the band
Generate 4. The tone signal 214 is superimposed on the mixed signal 215 from the mixed signal generator 2.4 and sent to the mixer 215.
The signal is placed on the downlink signal 216 and sent from the coupler 207 to the transmission medium 12.
伝送媒体１２から各端末装置に送られたトーン信号を含
む信号は、各端末装置内のトーン検出器３４により検出
される。トーン信号が検出されると、マイクロプロセッ
サ−３２は、端末装置相互間の通信のために指示されて
いた受信チャンネルをセンター装置１１からの指示を受
けるために別のチャンネルを選択して受信用シンセサイ
ザー３３を制御し、受信用シンセサイザー３３はそのチ
ャンネルの信号を受信する。センター装置１１は、その
後指定した通信回線を用いて同報通信を行なう。A signal containing a tone signal sent from the transmission medium 12 to each terminal device is detected by a tone detector 34 within each terminal device. When the tone signal is detected, the microprocessor 32 selects another channel for receiving instructions from the center device 11 from the receiving channel designated for communication between the terminal devices, and switches the receiving synthesizer to another channel for receiving instructions from the center device 11. 33, and the reception synthesizer 33 receives the signal of that channel. The center device 11 then performs broadcast communication using the specified communication line.
発明の効果
本発明は上記実施例から明らかなように、端末装置相互
間で通信を行なっているときでも緊急時にセンター装置
が各端末装置に対し同報を行なうことができ、緊急時の
同報受信指令信号が音声帯域外の周波数の信号なので回
線の品質や音質を劣化させることがなく、しかも設備を
増加させることなく低コストでシステムを構成できる利
点がある。Effects of the Invention As is clear from the above embodiments, the present invention allows the center device to broadcast broadcasts to each terminal device in an emergency even when terminal devices are communicating with each other, Since the reception command signal is a signal with a frequency outside the voice band, there is no deterioration in line quality or sound quality, and there is an advantage that the system can be configured at low cost without increasing equipment.
第１図は本発明の一実施例における閉域有線通信装置の
システム構成図、第２図は本発明の一実施例におけるセ
ンター装置の概略構成図、第３図は本発明の一実施例に
おける端末装置の概略構成図である。
１１・・・センター装置、１２・・・伝送媒体、１３．
１４．１５．１６・・・端末装置、２０１・・・分岐器
、２０２・・・分離器、２０３・・・混合器、２０４・
・・混合信号発生器、２０５・・・トーンジェネレータ
ー ２０６・・・起動器、２０７・・・結合器１，２１
１・・・伝送媒体１２の中を流れる信号、２１２・・・
通信用上り信号、２１３・・・緊急時の起動信号、２１
４・・・重畳する音声帯域外の同報受信指令信号（トー
ン信号）、２１５・・・上り帯域信号を下り帯域信号に
変換するための混合信号、２１６・・・混合された下り
信号、３１・・・分岐器、３２・・・マイクロプロセッ
サ−３３・・・受信用シンセサイザー ３４・・・トー
ン検出器、３５・・・送信用シンセサイザー ３６・・
・音声出力、３７・・・音声入力。FIG. 1 is a system configuration diagram of a closed-area wired communication device according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a center device according to an embodiment of the present invention, and FIG. 3 is a terminal diagram according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of the device. 11... Center device, 12... Transmission medium, 13.
14.15.16... Terminal device, 201... Brancher, 202... Separator, 203... Mixer, 204...
... Mixed signal generator, 205 ... Tone generator 206 ... Starter, 207 ... Combiner 1, 21
1... Signal flowing in the transmission medium 12, 212...
Communication uplink signal, 213...Emergency activation signal, 21
4...Broadcast reception command signal (tone signal) outside the audio band to be superimposed, 215...Mixed signal for converting uplink band signal to downlink band signal, 216...Mixed downlink signal, 31 ... Brancher, 32 ... Microprocessor - 33 ... Synthesizer for reception 34 ... Tone detector, 35 ... Synthesizer for transmission 36 ...
- Audio output, 37... Audio input.
Claims (1)
間の通信を制御するセンター装置内に設けられて、ある
端末装置から他の端末装置への上り帯域信号を下り帯域
信号に変換する混合器に音声帯域以外の同報受信指令信
号を生成して重畳する手段と、各端末装置内に設けられ
て、センター装置から送られてきた信号の中から前記同
報受信指令信号を検出する手段と、前記検出信号に基づ
いてセンター装置から同報通信を受けられるように受信
チャンネルを選択制御する手段とを備えた閉域有線通信
装置。A mixer that is installed in a center device that performs broadcast communication to each terminal device and controls communication between each terminal device, and converts an upstream band signal from one terminal device to another into a downstream band signal. means for generating and superimposing a broadcast reception command signal in a region other than the voice band; and means provided in each terminal device for detecting the broadcast reception command signal from among the signals sent from the center device. , means for selectively controlling a reception channel so as to receive broadcast communication from a center device based on the detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20196589A JPH0365855A (en) | 1989-08-02 | 1989-08-02 | Closed area wire communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20196589A JPH0365855A (en) | 1989-08-02 | 1989-08-02 | Closed area wire communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365855A true JPH0365855A (en) | 1991-03-20 |
Family
ID=16449698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20196589A Pending JPH0365855A (en) | 1989-08-02 | 1989-08-02 | Closed area wire communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365855A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57171883A (en) * | 1981-11-12 | 1982-10-22 | Victor Co Of Japan Ltd | Video signal distributing and transmitting device |
| JPS60174589A (en) * | 1984-02-20 | 1985-09-07 | Matsushita Electric Ind Co Ltd | Television telephone |
| JPS6199430A (en) * | 1984-10-19 | 1986-05-17 | Fujitsu Ltd | Communication system of time division radio line concentration |
| JPS63103584A (en) * | 1986-10-20 | 1988-05-09 | Yagi Antenna Co Ltd | Television telephone set |
-
1989
- 1989-08-02 JP JP20196589A patent/JPH0365855A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57171883A (en) * | 1981-11-12 | 1982-10-22 | Victor Co Of Japan Ltd | Video signal distributing and transmitting device |
| JPS60174589A (en) * | 1984-02-20 | 1985-09-07 | Matsushita Electric Ind Co Ltd | Television telephone |
| JPS6199430A (en) * | 1984-10-19 | 1986-05-17 | Fujitsu Ltd | Communication system of time division radio line concentration |
| JPS63103584A (en) * | 1986-10-20 | 1988-05-09 | Yagi Antenna Co Ltd | Television telephone set |
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