JPH05276509A - Video conference system using satellite line - Google Patents

Video conference system using satellite line

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Publication number
JPH05276509A
JPH05276509A JP3071606A JP7160691A JPH05276509A JP H05276509 A JPH05276509 A JP H05276509A JP 3071606 A JP3071606 A JP 3071606A JP 7160691 A JP7160691 A JP 7160691A JP H05276509 A JPH05276509 A JP H05276509A
Authority
JP
Japan
Prior art keywords
station
video
transmission
modem
image
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.)
Granted
Application number
JP3071606A
Other languages
Japanese (ja)
Other versions
JP2841907B2 (en
Inventor
Toru Murano
亨 村野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP3071606A priority Critical patent/JP2841907B2/en
Publication of JPH05276509A publication Critical patent/JPH05276509A/en
Application granted granted Critical
Publication of JP2841907B2 publication Critical patent/JP2841907B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To reduce a switching time of a video line in the television conference system using a satellite line. CONSTITUTION:A station controlling the video conference system is provided with a master controller 2 and each of transmission reception stations #1-#N being system components of the television conference system is provided with a slave controller (4, 9, 14) revising a transmission carrier and a reception carrier of a MODEM (5, 10, 15) based on a control signal from the master controller 2. When a video line is selected, since a station not being a video transmission station is able to receive a video image set newest by having only to revise transmission reception frequencies (f1, f2) of a video image transmission station (station #2), it is not required to select carriers of lots of the reception stations.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、テレビ会議システムに
関し、特に、衛星回線を使用したテレビ会議システムに
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video conference system, and more particularly to a video conference system using a satellite line.

【0002】[0002]

【従来の技術】従来の衛星回線を使用したテレビ会議シ
ステムは、図3に示すように、衛星キャリアを送受信す
る衛星送受信機T/Rと、映像回線を送受信するモデム
(MODEM)と、モデムからの映像信号を表示するモ
ニタ装置と、モデムへ映像信号を送信するカメラ装置と
を有している。
2. Description of the Related Art As shown in FIG. 3, a conventional video conference system using a satellite line includes a satellite transceiver T / R for transmitting and receiving a satellite carrier, a modem (MODEM) for transmitting and receiving a video line, and a modem. And a camera device for transmitting the video signal to the modem.

【0003】図3は、映像回線2キャリアを使用して、
2波の映像送信局は互いの映像を受信し映像送信局では
ない局は最も新しく設定された映像を受信する方式の衛
生回線テレビ会議システムであり、現時点で新しい映像
を送信している局を送受信局#1に設定し、現時点で古
い映像を送信している局を送受信局#2に設定してい
る。ここで、f1 は新しい映像を送信している送信周波
数であり、f2 は古い映像を送信している送信周波数で
ある。
FIG. 3 shows a case where two video line carriers are used.
The two-wave video transmission station receives each other's video, and the station that is not the video transmission station receives the most recently set video. It is a sanitary line video conference system. The transmitting / receiving station # 1 is set, and the station transmitting the old video at the present time is set to the transmitting / receiving station # 2. Here, f 1 is a transmission frequency for transmitting a new video, and f 2 is a transmission frequency for transmitting an old video.

【0004】図4のように、映像送信局を送受信局#N
に変更する場合には、図3で古い映像を送信している送
受信局#2の映像送信を停止させ、その停止させた送信
周波数f2 を送受信局#Nに割り当て送受信局#2から
送受信局(N−1)の受信周波数をf2 に切り換える。
As shown in FIG. 4, the video transmitting station is set to the transmitting / receiving station #N.
3 is stopped, the transmission / reception station # 2 transmitting the old image in FIG. 3 stops the transmission of the image and the stopped transmission frequency f 2 is assigned to the transmission / reception station #N. The reception frequency of (N-1) is switched to f 2 .

【0005】[0005]

【発明が解決しようとする課題】しかしながら、この従
来における衛生回線を使用したテレビ会議システムで
は、映像回線を切り換える際に、停止させた送信局の送
信周波数fを新たに映像送信局に設定する局へ割り当て
ると、数的に多い受信局のキャリアを切り換えなければ
ならないために、制御信号のやりとりが複雑であった。
そのために、映像キャリアの切換え時間が余分に必要で
あるという課題があった。
However, in the conventional video conference system using the sanitary line, the station which newly sets the transmission frequency f of the stopped transmission station to the video transmission station when switching the video line. However, since the carrier of the receiving station which is numerically large must be switched, the control signal exchange is complicated.
Therefore, there is a problem that extra time is required for switching the video carrier.

【0006】本発明は従来の上記実情に鑑みて成された
ものであり、従って本発明の目的は、従来の技術に内在
する上記課題を解決することを可能とする衛生回線を使
用した新規なテレビ会議システムを提供することにあ
る。
The present invention has been made in view of the above-mentioned conventional circumstances. Therefore, the object of the present invention is to provide a novel sanitary line using a sanitary line which can solve the above-mentioned problems inherent in the prior art. To provide a video conference system.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、本発明に係る衛生回線を使用したテレビ会議システ
ムは、テレビ会議システムを制御する局にマスタ制御装
置を備え、テレビ会議システムを構成する各局にはマス
タ制御装置からの信号のもとにモデム(MODEM)の
送信キャリアの変更、受信キャリアの変更を行うスレー
ブ制御装置を備えて構成される。
In order to achieve the above object, a video conference system using a sanitary line according to the present invention comprises a master control device in a station for controlling the video conference system, and constitutes a video conference system. Each station is provided with a slave control device for changing the transmission carrier and the reception carrier of the modem (MODEM) based on the signal from the master control device.

【0008】[0008]

【作用】テレビ会議システムを構成する各局に、マスタ
制御装置からの制御信号のもとにモデムの送信キャリア
の変更、受信キャリアの変更を行うスレーブ制御装置を
備えていることによって、映像回線を切り換える際に映
像送信局(2局)の送受信キャリアを変更するのみで、
映像送信局でない局は一番新しく設定された映像を受信
することができる。
The video lines are switched by providing each station constituting the video conference system with a slave control device for changing the transmission carrier and the reception carrier of the modem under the control signal from the master control device. Just change the transmission and reception carrier of the video transmission station (2 stations),
A station that is not a video transmitting station can receive the most recently set video.

【0009】[0009]

【実施例】次に本発明をその好ましい一実施例について
図面を参照して具体的に説明する。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the accompanying drawings with reference to the accompanying drawings.

【0010】図1、図2は本発明の一実施例を示す系統
図である。
1 and 2 are system diagrams showing one embodiment of the present invention.

【0011】図1において、送受信局#1からの映像
は、カメラ7より入力し、モデム(MODEM)5を通
過して送信周波数f1 でT/R3より衛生に向けて出力
される。送受信局#2〜送受信局#Nの受信周波数は、
制御局のマスタ制御装置2からT/R1を通過して出力
されるCSC信号を、送受信局#2〜送受信局#NのT
/R8〜T/R13で受信し、スレーブ制御装置9〜ス
レーブ制御装置14によりモデム(MODEM)5〜モ
デム(MODEM)15に周波数f1 で設定されること
によって、送受信局#1の映像は衛星を経由して送受信
局#2〜送受信局#Nの各々T/R8〜T/R13、モ
デム(MODEM)10〜モデム(MODEM)15を
通過して、モニタ11〜モニタ16に出力される。
In FIG. 1, the image from the transceiver station # 1 is input from the camera 7, passes through the modem (MODEM) 5, and is output from the T / R 3 toward the hygiene at the transmission frequency f 1 . The reception frequencies of the transceiver stations # 2 to #N are
The CSC signal output from the master control device 2 of the control station through the T / R1 is transmitted to the T / R stations of the transceiver stations # 2 to #N.
/ R8 to T / R13 and the slave controller 9 to the slave controller 14 set the frequency f 1 to the modem (MODEM) 5 to the modem (MODEM) 15 so that the image of the transceiver station # 1 is transmitted to the satellite. Via the T / R8 to T / R13 of the transceiver stations # 2 to #N and the modem (MODEM) 10 to the modem (MODE) 15 respectively, and are output to the monitors 11 to 16.

【0012】現時点で古い映像を送信している送受信局
#2からの映像は、カメラ12より入力し、モデム10
を通過して送信周波数f2 でT/R8より衛星に向けて
出力される。送受信局#1の受信周波数は、制御局のマ
スタ制御装置2からT/R1を通過して出力されるCS
C信号をT/R3で受信し、スレーブ制御装置4により
モデム5に周波数f2 で設定されることによって送受信
局#2の映像は衛星を経由して送受信局#1のT/R
3、モデム5を通過して、モニタ6に出力される。
The video from the transmitter / receiver station # 2, which is transmitting the old video at the present time, is input from the camera 12 to the modem 10
And is output from the T / R 8 toward the satellite at the transmission frequency f 2 . The reception frequency of the transceiver station # 1 is CS output from the master control device 2 of the control station through the T / R1.
When the C signal is received by the T / R 3 and the slave controller 4 sets the frequency of the modem 5 at the frequency f 2 , the image of the transceiver # 2 is transmitted via the satellite to the T / R of the transceiver # 1.
3 and passes through the modem 5, and is output to the monitor 6.

【0013】図2は、映像回線切り換えとして、新たな
映像送信局を送受信局#Nに設定した場合を想定してい
る。
FIG. 2 assumes a case where a new video transmission station is set to the transmission / reception station #N as the video line switching.

【0014】図2を参照するに、制御局のマスタ制御装
置19からT/R18を通過して出力されるCSC信号
を送受信局#2のT/R25で受信し、スレーブ制御装
置26によりT/R25に送信を停止させ、マスタ制御
装置19から衛星経由で送信される制御信号を送受信局
#1のT/R20で受信し、スレーブ制御装置21によ
りモデム22の送信周波数f1 をf2 に切り換え、受信
周波数f2 をf1 に切り換える。新たな映像送信局であ
る送受信局#Nは制御局のマスタ制御装置19から衛星
経由で送信されてくるCSC信号をT/R30で受信
し、スレーブ制御装置31によりモデム32の受信周波
数f1 をf2 に切り換え、送信周波数をf1 に設定す
る。これにより、送受信局#Nの映像はカメラ34より
入力し、モデム32を通過し、T/R30から送信周波
数f1 で衛星に向けて出力され、送受信局#1〜送受信
局(#N−1)の各々T/R20〜T/R(N−1)、
モデム(MODEM)22〜モデム(MODEM)(N
−1)を通過してモニタ23〜モニタ(N−1)に出力
される。送受信局#1の映像は、カメラ24より入力
し、モデム22を通過してT/R20から送信周波数f
2 で衛星に向けて出力され、送受信局#NのT/R3
0、モデム32を通過してモニタ33に出力される。
Referring to FIG. 2, the CSC signal output from the master control device 19 of the control station through the T / R 18 is received by the T / R 25 of the transceiver station # 2, and the slave control device 26 receives the T / R 25 signal. The transmission is stopped by R25, the control signal transmitted from the master controller 19 via the satellite is received by the T / R20 of the transceiver station # 1, and the slave controller 21 switches the transmission frequency f 1 of the modem 22 to f 2 . , The reception frequency f 2 is switched to f 1 . The transceiver station #N, which is a new video transmission station, receives the CSC signal transmitted from the master controller 19 of the control station via the satellite at the T / R 30, and the slave controller 31 determines the reception frequency f 1 of the modem 32. Switch to f 2 and set the transmission frequency to f 1 . As a result, the image of the transmitting / receiving station #N is input from the camera 34, passes through the modem 32, and is output from the T / R 30 to the satellite at the transmission frequency f 1 , and the transmitting / receiving stations # 1 to # (N-1) ) Each of T / R20 to T / R (N-1),
Modem 22-Modem (N)
-1) and is output to the monitor 23 to monitor (N-1). The image of the transceiver station # 1 is input from the camera 24, passes through the modem 22, and is transmitted from the T / R 20 at the transmission frequency f.
Output to satellite at 2 and T / R3 of transceiver #N
0, passes through the modem 32 and is output to the monitor 33.

【0015】[0015]

【発明の効果】以上説明したように、本発明によればテ
レビ会議システムを制御する局にマスタ制御装置を備
え、テレビ会議システムを構成する各局にマスタ制御装
置からの制御信号のもとにモデムの送信キャリアの変
更、受信キャリアの変更を行うスレーブ制御装置を備
え、映像回線を切り換える際に、映像送信局(2局)の
送受信周波数(f1 ,f2 )を変更するのみで、映像送
信局でない局は最も新しく設定された映像を受信できる
ので、数的に多い受信局のキャリアを切り換える必要が
なく、制御信号のやりとりが複雑でないために、映像回
線の切り換え時間を短縮できるという効果が得られる。
As described above, according to the present invention, a station for controlling a video conference system is provided with a master control device, and each station constituting the video conference system is provided with a modem based on a control signal from the master control device. It is equipped with a slave control device that changes the transmission carrier and the reception carrier of the above, and when switching the video line, it is possible to transmit the video only by changing the transmission / reception frequency (f 1 , f 2 ) of the video transmission station (2 stations). Since a station that is not a station can receive the most recently set video, it is not necessary to switch the carrier of a number of receiving stations, and the exchange of control signals is not complicated, so the effect that the switching time of the video line can be shortened is achieved. can get.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示すブロック構成図であ
る。
FIG. 1 is a block diagram showing an embodiment of the present invention.

【図2】映像回線切り換えとして新たなる映像送信局を
送受信局#Nに設定した場合を想定した図1と同様のブ
ロック図である。
FIG. 2 is a block diagram similar to FIG. 1, assuming a case where a new video transmission station is set as a transmission / reception station #N as video line switching.

【図3】従来技術のブロック図である。FIG. 3 is a block diagram of the prior art.

【図4】従来技術のブロック図である。FIG. 4 is a block diagram of the prior art.

【符号の説明】 1…送受信機 2…マスタ制御装置 3…送受信機 4…スレーブ制御装置 5…モデム( 変復調装置) 6…モニタ 7…カメラ 8…送受信機 9…スレーブ制御装置 10…モデム( 変復調装置) 11…モニタ 12…カメラ 13…送受信機 14…スレーブ制御装置 15…モデム( 変復調装置) 16…モニタ 17…カメラ 18…送受信機 19…マスタ制御装置 20…送受信機 21…スレーブ制御装置 22…モデム(変復調装置) 23…モニタ 24…カメラ 25…送受信機 26…スレーブ制御装置 27…モデム(変復調装置) 28…モニタ 29…カメラ 30…送受信機 31…スレーブ制御装置 32…モデム(変復調装置) 33…モニタ 34…カメラ a…送受信機 b…変復調装置 c…モニタ d…カメラ e…送受信機 f…変復調装置 g…モニタ h…カメラ i…送受信機 j…変復調装置 k…モニタ l…カメラ m…送受信機 n…変復調装置 o…モニタ p…カメラ q…送受信機 r…変復調装置 s…モニタ t…カメラ u…送受信機 v…変復調装置 w…モニタ x…カメラ[Description of Codes] 1 ... Transceiver 2 ... Master controller 3 ... Transceiver 4 ... Slave controller 5 ... Modem (modulator / demodulator) 6 ... Monitor 7 ... Camera 8 ... Transceiver 9 ... Slave controller 10 ... Modem (modulator / demodulator Device 11 ... Monitor 12 ... Camera 13 ... Transceiver 14 ... Slave control device 15 ... Modem (modulator / demodulator) 16 ... Monitor 17 ... Camera 18 ... Transceiver 19 ... Master control device 20 ... Transceiver 21 ... Slave control device 22 ... Modem (modulation / demodulation device) 23 ... Monitor 24 ... Camera 25 ... Transceiver 26 ... Slave control device 27 ... Modem (modulation / demodulation device) 28 ... Monitor 29 ... Camera 30 ... Transceiver 31 ... Slave control device 32 ... Modem (modulation / demodulation device) 33 ... Monitor 34 ... Camera a ... Transceiver b ... Modulator / demodulator c ... Monitor d ... Camera e ... Transceiver f ... Modulation Adjustment device g ... Monitor h ... Camera i ... Transceiver j ... Modulator / demodulator k ... Monitor l ... Camera m ... Transceiver n ... Modulator / demodulator o ... Monitor p ... Camera q ... Transceiver r ... Modulator / demodulator s ... Monitor t ... Camera u ... Transceiver v ... Modulator / demodulator w ... Monitor x ... Camera

─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成5年3月19日[Submission date] March 19, 1993

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】図面[Document name to be corrected] Drawing

【補正対象項目名】全図[Correction target item name] All drawings

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【図1】 [Figure 1]

【図2】 [Fig. 2]

【図3】 [Figure 3]

【図4】 [Figure 4]

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 映像回線2キャリアを使用して、2波の
映像送信局は互いの映像を受信し、映像送信局でない局
は最も新しく設定された映像を受信する方式の衛星回線
テレビ会議システムにおいて、テレビ会議システムを制
御する局にマスタ制御装置を設置し、テレビ会議システ
ムを構成する各局には衛星キャリアを送受信する衛星送
受信機と、映像回線を送受信するモデムと、このモデム
からの映像信号を表示するモニタ装置と、モデムへ映像
信号を送信するカメラ装置と、前記マスタ制御装置から
の制御信号のもとにモデムの送信キャリアの変更、受信
キャリアの変更を行うスレーブ制御装置を備え、映像送
信局を変更する際に現時点で古い映像を送信している局
の映像送信を停止し、この停止された映像送信キャリア
を現時点で新しい映像を送信している局の映像送信用キ
ャリアと入替えを行い入替えられた残ったキャリアを次
の映像送信局に割り当て、互いの送信局の受信映像はお
互いの映像を受信するキャリアに変更することを前記マ
スタ制御装置からの制御に従って前記スレーブ制御装置
がモデムを制御することを特徴とした衛星回線を使用し
たテレビ会議システム。
1. A satellite line video conferencing system in which two wave image transmitting stations receive each other's images and stations other than the image transmitting stations receive the most recently set image by using two image line carriers. In the above, a master controller is installed in a station that controls the video conference system, and each station that configures the video conference system has a satellite transceiver that transmits and receives satellite carriers, a modem that transmits and receives a video line, and a video signal from this modem. A monitor device for displaying, a camera device for transmitting a video signal to the modem, and a slave control device for changing the transmission carrier and the reception carrier of the modem under the control signal from the master control device. When changing the transmission station, stop the video transmission of the station that is currently transmitting the old video and display the stopped video transmission carrier at the current time. Replace the image transmission carrier of the station that is transmitting the image, assign the remaining replaced carrier to the next image transmission station, and change the reception image of each transmission station to the carrier that receives each other's image. A video conference system using a satellite line, wherein the slave controller controls a modem according to the control from the master controller.
JP3071606A 1991-04-04 1991-04-04 Video conferencing system using satellite line Expired - Fee Related JP2841907B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3071606A JP2841907B2 (en) 1991-04-04 1991-04-04 Video conferencing system using satellite line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3071606A JP2841907B2 (en) 1991-04-04 1991-04-04 Video conferencing system using satellite line

Publications (2)

Publication Number Publication Date
JPH05276509A true JPH05276509A (en) 1993-10-22
JP2841907B2 JP2841907B2 (en) 1998-12-24

Family

ID=13465481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3071606A Expired - Fee Related JP2841907B2 (en) 1991-04-04 1991-04-04 Video conferencing system using satellite line

Country Status (1)

Country Link
JP (1) JP2841907B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08256317A (en) * 1995-03-17 1996-10-01 Nec Corp Video conference system and its center station system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548416A (en) * 1977-06-22 1979-01-22 Nippon Telegr & Teleph Corp <Ntt> Multiple television conference system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548416A (en) * 1977-06-22 1979-01-22 Nippon Telegr & Teleph Corp <Ntt> Multiple television conference system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08256317A (en) * 1995-03-17 1996-10-01 Nec Corp Video conference system and its center station system

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