JPH01192287A - Video communication system - Google Patents
Video communication systemInfo
- Publication number
- JPH01192287A JPH01192287A JP63017926A JP1792688A JPH01192287A JP H01192287 A JPH01192287 A JP H01192287A JP 63017926 A JP63017926 A JP 63017926A JP 1792688 A JP1792688 A JP 1792688A JP H01192287 A JPH01192287 A JP H01192287A
- Authority
- JP
- Japan
- Prior art keywords
- terminal number
- terminal
- section
- signal
- subscriber
- 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
- 238000004891 communication Methods 0.000 title claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000000284 extract Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Landscapes
- Communication Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は映像通信方式に関し、特に回線切換スイッチ装
置に接続された加入者端末間で映像信号を送受信する映
像通信方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video communication system, and more particularly to a video communication system for transmitting and receiving video signals between subscriber terminals connected to a line changeover switch device.
テレビ会議等の映像通信サービスの回線は、電話に比べ
信号の情報量が多く高品質を要求されるので一般的には
専用回線が使用される。しかし、回線の有効利用を図る
ため、加入者端末をネットワーク内に設けた回線切換ス
イッチ装置により、加入者の申し込み（接続要求）に対
してスイッチを切換えて相手の加入者端末と接続してい
る。このような回線切換による方法では、接続要求をし
た端末が相手側の端末と正しく接続されたこと確認し、
通信を開始することが必要となってくる。Lines for video communication services such as video conferences generally use dedicated lines because the amount of signal information is greater than that for telephone calls and high quality is required. However, in order to make effective use of lines, a subscriber terminal is connected to the other subscriber terminal by switching the switch in response to a subscriber's application (connection request) using a line switching device installed within the network. . In this type of line switching method, the terminal that made the connection request confirms that it is correctly connected to the other party's terminal, and
It becomes necessary to start communication.
第２図は従来の映像通信方式の一例のブロック図である
。両端の加入者端末１６．１６Ａの加入者送信部１１．
１１Ａにパイロット信号送信機１３．１３Ａ、加入者受
信部１２，１２Ａにパイロット信号受信機１４．１４Ａ
が設けられ、回線接続時、両端の加入者端末１６．１６
Ａのパイロット信号送信機１３．１３Ａからパイロット
信号をそれぞれ送出し、相手のパイロット信号受信機１
４．１４Ａで、前述のパイロット信号を受信し回線接続
の確認としている。FIG. 2 is a block diagram of an example of a conventional video communication system. Subscriber transmitter 11. of subscriber terminals 16.16A at both ends.
11A is a pilot signal transmitter 13.13A, subscriber receiving section 12, 12A is a pilot signal receiver 14.14A
is provided, and when the line is connected, subscriber terminals 16 and 16 at both ends
A's pilot signal transmitter 13. Sends a pilot signal from 13A, and sends a pilot signal to the other party's pilot signal receiver 1.
4.14A, the aforementioned pilot signal is received and line connection is confirmed.
上述した従来の映像通信回線の接続方式は、遠く離れた
加入者端末間で接続確認のためのパイロット信号送信お
よび受信確認の動作を同期をとって行う必要があり、同
一のパイロット信号を各加入者端末で使用している場合
、接続の確認は行なわれるが、誤接続の判定は行なわれ
ないという欠点がある。In the conventional video communication line connection method described above, it is necessary to synchronize pilot signal transmission and reception confirmation operations for connection confirmation between subscriber terminals far apart, and the same pilot signal is sent to each subscriber terminal. When used on a private terminal, the connection is confirmed, but there is no determination of erroneous connections.
本発明の映像通信方式は、自端末番号を設定する自端末
番号設定部と、相手側の端末番号を登録する相手側端末
入力部と、前記自端末番号を映像信号の特定フレームに
コード化して加入者回線に送出する多重化部と、着信の
前記加入者回線から受信の端末番号を抽出する端末番号
分離部と、前記相手側の端末番号と前記受信の端末番号
が一致しているとき送信可信号を出力する比較判定部と
、前記送信可信号によりＴＶ右カメラらの映像信号を前
記多重化部を制御して前記加入者回線に送出させる制御
部とを有することを特徴とする。The video communication system of the present invention includes a terminal number setting section for setting the terminal number, a terminal input section for registering the terminal number of the other party, and a terminal input section for encoding the terminal number into a specific frame of a video signal. a multiplexing unit that sends a call to a subscriber line; a terminal number separation unit that extracts a receiving terminal number from the incoming subscriber line; and a terminal number separating unit that extracts a receiving terminal number from the incoming subscriber line; The present invention is characterized by comprising a comparison/determination section that outputs a transmittable signal, and a control section that controls the multiplexing section to transmit video signals from the TV right camera and the like to the subscriber line using the transmittable signal.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は、本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
加入者端末６は、回線切替スイッチ装置５．５Ａと中継
回線７及び加入者回線８，８Ａを介して加入者端末６Ａ
と接続される。それぞれの加入者端末６．６Ａ内では、
接続に先たち接続する相手側の端末番号を相手側端末番
号入力部９に設定しておく。又、自端末番号を自端末番
号設定部３に設定しておく。The subscriber terminal 6 is connected to the subscriber terminal 6A via the line changeover switch device 5.5A, the relay line 7, and the subscriber lines 8, 8A.
connected to. Within each subscriber terminal 6.6A,
Prior to connection, the terminal number of the other party to be connected is set in the other party terminal number input field 9. Further, the own terminal number is set in the own terminal number setting section 3.
多重化部１０は、ＴＶ右カメラ５からの出力信号のうち
、映像信号部分のみを削除し、同期信号のみとし自端末
番号設定部３に設定されている自端末番号を特定のフレ
ームにコード化し多重化し、加入者回線８，８Ａへ出力
する。The multiplexing unit 10 deletes only the video signal part of the output signal from the TV right camera 5, makes only the synchronization signal, and encodes the own terminal number set in the own terminal number setting unit 3 into a specific frame. It is multiplexed and output to subscriber lines 8 and 8A.
一方、加入者回線８，８Ａからの受信信号は、端末番号
分離部１により特定フレームに多重化されている受信の
端末番号を抽出し、比較判定部２により、相手側端末番
号入力部９に設定されている相手側の端末番号と比較さ
れる。On the other hand, from the received signals from the subscriber lines 8 and 8A, the terminal number separator 1 extracts the receiving terminal number multiplexed in a specific frame, and the comparison and determination section 2 inputs the receiving terminal number to the other party's terminal number input section 9. It is compared with the configured terminal number of the other party.
比較判定の結果、双方の端末番号が一致したときは接続
された相手側端末は接続を要求した端末なので比較判定
部２は送信可信号を出力する。制御部４は、送信可信号
によりＴＶ右カメラ５からの映像信号を多重化部１０に
対して加入者回線に送出させる制御をする。比較判定の
結果、双方の端末番号が異なるときは、誤接続あるいは
未接続と判断し多重化部１０はＴＶ右カメラ５からの映
像信号を送出しない。なお、ＴＶモニタ１７は、相手側
からの画像を表示する。As a result of the comparison and determination, if the terminal numbers of both sides match, the connected terminal is the one that requested the connection, so the comparison and determination section 2 outputs a transmission permission signal. The control section 4 controls the multiplexing section 10 to transmit the video signal from the TV right camera 5 to the subscriber line based on the transmission enable signal. As a result of the comparison, if the terminal numbers of both terminals are different, it is determined that there is an erroneous connection or no connection, and the multiplexer 10 does not send out the video signal from the TV right camera 5. Note that the TV monitor 17 displays an image from the other party.
以上説明したように本発明は、画像情報を送り出す前に
、特定フレームに自端末の確認用端末番号を送出し、受
信側では、該当端末番号を抽出し、通信の相手先を確認
し、その後、自端末側の画像情報を送出することにより
、重要な情報を他に漏洩することなく、正しい相手先に
接続された場合にのみ通信を行うことができる効果を有
する。As explained above, in the present invention, before sending image information, the terminal number for confirmation of the own terminal is sent in a specific frame, and on the receiving side, the corresponding terminal number is extracted, the communication destination is confirmed, and then By transmitting the image information of the terminal itself, it is possible to communicate only when connected to the correct destination without leaking important information to others.
第１図は本発明の一実施例のブロック図、第２図は従来
の映像通信方式の一例を示すブロック図である。
１・・・端末番号分離部、２・・・比較判定部、３・・
・自端末番号設定部、４・・・制御部、５，５Ａ・・・
回線切換スイッチ装置、６．６Ａ、１６．１６Ａ・・・
加入者端末、７・・・中継回線、８，８Ａ・・・加入者
回線、９・・・相手側端末番号入力部、１０・・・多重
化部、１１、ＩＩＡ・・・加入者送信部、１２．１２Ａ
・・・加入者受信部、１３．１３Ａ・・・パイロット信
号送信機、１４．１４Ａ・・・パイロット信号受信機、
１５・・・ＴＶ右カメラ１７・・・ＴＶモニタ。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a conventional video communication system. 1... Terminal number separation unit, 2... Comparison/judgment unit, 3...
- Own terminal number setting unit, 4...control unit, 5, 5A...
Line changeover switch device, 6.6A, 16.16A...
Subscriber terminal, 7... Relay line, 8, 8A... Subscriber line, 9... Opposite terminal number input section, 10... Multiplexing section, 11, IIA... Subscriber transmitting section , 12.12A
...Subscriber receiving unit, 13.13A...Pilot signal transmitter, 14.14A...Pilot signal receiver,
15...TV right camera 17...TV monitor.
Claims (1)
末番号を登録する相手側端末入力部と、前記自端末番号
を映像信号の特定フレームにコード化して加入者回線に
送出する多重化部と、着信の前記加入者回線から受信の
端末番号を抽出する端末番号分離部と、前記相手側の端
末番号と前記受信の端末番号が一致しているとき送信可
信号を出力する比較判定部と、前記送信可信号によりＴ
Ｖカメラからの映像信号を前記多重化部を制御して前記
加入者回線に送出させる制御部とを有することを特徴と
する映像通信方式。A terminal number setting section for setting the terminal number, a terminal input section for registering the terminal number of the other party, and multiplexing for encoding the terminal number into a specific frame of a video signal and transmitting it to the subscriber line. a terminal number separation unit that extracts a receiving terminal number from the incoming subscriber line; and a comparison determining unit that outputs a send permission signal when the terminal number of the other party and the receiving terminal number match. and T by the transmittable signal.
A video communication system comprising: a control section that controls the multiplexing section to transmit a video signal from the V camera to the subscriber line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017926A JPH01192287A (en) | 1988-01-27 | 1988-01-27 | Video communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017926A JPH01192287A (en) | 1988-01-27 | 1988-01-27 | Video communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01192287A true JPH01192287A (en) | 1989-08-02 |
Family
ID=11957375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63017926A Pending JPH01192287A (en) | 1988-01-27 | 1988-01-27 | Video communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01192287A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0723102A (en) * | 1993-06-30 | 1995-01-24 | Nec Corp | Picture communication terminal equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62276939A (en) * | 1986-05-26 | 1987-12-01 | Canon Inc | Data communication equipment |
-
1988
- 1988-01-27 JP JP63017926A patent/JPH01192287A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62276939A (en) * | 1986-05-26 | 1987-12-01 | Canon Inc | Data communication equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0723102A (en) * | 1993-06-30 | 1995-01-24 | Nec Corp | Picture communication terminal equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4533943A (en) | Videocommunication network between videophone terminals and a picture bank | |
| US4580291A (en) | Method for processing digital signals, and subscriber station for telecommunication and teledistribution | |
| US6621514B1 (en) | Video conferencing system | |
| US5495285A (en) | Communication system for starting teleconference between two multimedia stations over network | |
| EP0573192A1 (en) | Method and apparatus for muting switching noise while switching between CODECS | |
| US5777664A (en) | Video communication system using a repeater to communicate to a plurality of terminals | |
| JPH01192287A (en) | Video communication system | |
| JPH10303890A (en) | Bulk transmission system using exclusive line | |
| JPH0195683A (en) | Video communication system | |
| JPH0254689A (en) | Video communication system | |
| JPH07184183A (en) | Multi-point video conference system | |
| JPH0662398A (en) | Picture communication terminal equipment | |
| JP3582140B2 (en) | Communication test system and communication test method | |
| JP2000115730A (en) | Video telephone set and its mode setting method | |
| JP2839036B2 (en) | Videophone device with caller identification function | |
| JPH0427290A (en) | Still picture transmission device | |
| JPH03258150A (en) | Line duplicate communication system and terminal adaptor for transmission and reception | |
| JPH0775080A (en) | Video conference terminal | |
| JPH06291807A (en) | Picture communications terminal equipment | |
| JPS59126359A (en) | Facsimile communication system | |
| JPH04124985A (en) | Multimedia communication equipment | |
| JPH07321916A (en) | Subscriber test equipment | |
| JPH0879407A (en) | Multimedia terminal equipment | |
| KR20020001894A (en) | multi-communication method of image data transmitter | |
| JPH07226926A (en) | Multi-medium transmission system and method thereof |