JPH0810891B2 - Electronic blackboard conference control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of an electronic blackboard conference control system in a conference telephone system that also uses an electronic blackboard.

Conference telephone systems are being put to practical use as part of diversifying telephone exchange services.

In this type of conference call system, not only a voice conference using a telephone terminal but also an attempt to use an electronic blackboard is being attempted. The characters, figures, etc. (hereinafter collectively referred to as images) written on the electronic blackboard on which the participants of the conference are installed are displayed on the electronic blackboard of each participant. Therefore, each participant can always see the same image on the electronic blackboard and hold a conference.

In order to smoothly operate the conference, it is desirable that the same image as that of the electronic blackboard that has participated from the beginning is displayed on the electronic blackboard that participated in the conference using the electronic blackboard together.

[Conventional technology]

FIG. 2 is a diagram showing an example of a conventional electronic blackboard conference control system.

In FIG. 2, the switching network 1 is provided with a conference device 2. The organizer 3 who wishes to hold the conference sends the special number for the conference call to the exchange network 1 and is connected to the conference device 2, and then selects the date and time of the conference and the telephone numbers of the participants. , Register conference reservation information.

At the registered date and time, the control device 21 in the conference device 2
Calls the organizer 3 from the channel ch1 via the switching network 1, connects to the connection terminal vbt1 of the voice bridge circuit 23 and the PB receiver 24 via the communication paths p1 and pr in the time switch 22, and is also registered. Called participants 41 and 42 from channels ch2 and ch3 via switching network 1, and when organizer 3 determines that attendance is possible and selects a special number for conference participation, call path p2 in time switch 22 is selected. Channels ch2 and ch3 via p3 and p3 for connection of audio bridge circuit 23 vb
Connect to t2 and vbt3.

When the organizer 3 selects the special number for holding the conference after the participants 41 and 42 have finished calling, the organizer 3 and each of the participants 41 and 42 start the conference call via the voice bridge circuit 23. The voice bridge circuit 23 superimposes the voices arriving from the respective connection terminals vbt1 to vbt3 to create a conference voice,
It is distributed to each connection terminal vbt1 to vbt3.

If the organizer 3 wishes to use the electronic blackboards 50 to 52 attached to the respective organizer 3 and the participants 41 and 42 during the conference, the special numbers for adding the electronic blackboard are followed by the respective electronic blackboard 50.
To 52 are sequentially selected from the telephone numbers dn0 to dn2 assigned to the subscriber line connecting the switching networks 1 to 52 to the switching network 1.

In the conference device 2, when the control device 21 receives the special number and the telephone numbers dn0 to dn2 via the PB receiver 24, the electronic blackboard from the channels ch4 to ch6 via the switching network 1
Call 50 to 52. When the organizer 3 and each of the participants 41 and 42 operate the communication buttons (not shown) provided on the electronic whiteboards 50 to 52, the controller 21 sets the call paths p4 to p6 in the time switch 22. , Channels ch4 to ch6 are connected to the connection terminals dbt1 to dbt3 of the data bridge circuit 25.

In this state, for example, when the organizer 3 draws an image on the electronic blackboard 50, the electronic blackboard 50 transmits the display information corresponding to the drawn image to the data bridge circuit 25 via the channel ch4 and the communication path p4. The data bridge circuit 25 distributes the display information arriving from the connection terminal dbt1 to the other connection terminals dbt2 and dbt3. The distributed display information is transmitted to the electronic blackboards 51 and 52 via the communication path p5 or p6 and the channel ch5 or ch6, respectively. Each electronic blackboard 51 and
The display information transmitted to 52 displays the same image as that drawn on the electronic blackboard 50 on the electronic blackboards 51 and 52. The images drawn on the electronic blackboards 51 and 51 in the same process are also displayed on the other electronic blackboards 50 to 52.

Therefore, the images drawn on the electronic blackboards 50 to 52 after the conference is held are displayed on the electronic blackboards 50 to 52 each time the image is drawn.

In addition, when a new participant 43 needs to join in the middle of the conference and the organizer 3 selects the special number for additional participation and the telephone number of the participant 43, the control device 21 sends the special number via the PB receiver 24. The number and the telephone number are received, the participant 43 is called from the channel ch7 through the switching network 1 in the same manner as described above, and further connected to the connection terminal vbt4 of the voice bridge circuit 23 through the communication path p7 in the time switch 22. , Can participate in a conference call made via the voice bridge circuit 23.

An electronic blackboard where the organizer 3 is also attached to the participant 43
In order to use 53, the telephone number dn3 assigned to the subscriber line connecting the electronic blackboard 53 to the switching network 1 is selected following the special number for adding the electronic blackboard, and the conference device 2 performs the same process as described above. Then, the electronic blackboard 53 is called up and connected to the connection terminal dbt4 of the data bridge circuit 25 via the channel ch8 in the exchange network 1 and the communication path p8 in the time switch 22. Thereafter, the data bridge circuit 25 distributes the display information arriving from the electronic blackboards 50 to 52 to the electronic blackboard 53 and displays the same image as the image drawn on the electronic blackboards 50 to 52 on the electronic blackboard 53. Let

However, the data bridge 25 only distributes the display information arriving from each of the connection terminals dbt1 to dbt3 to the other connection terminals dbt1 to dbt3, and does not have a function of accumulating each distributed display information. Therefore, before the electronic blackboard 53 is connected to the data bridge circuit 25, the display information showing the images drawn on the electronic blackboards 50 to 52 is not transmitted to the electronic blackboard 53 and is therefore displayed on the electronic blackboard 53. The image is the electronic blackboard 50 or
52 The image does not match the one displayed above.

[Problems to be solved by the invention]

As is clear from the above description, in the conventional electronic blackboard conference control system, the electronic blackboards that participated in the middle of the conference
Since the image displayed on 53 does not match the image displayed on the other electronic blackboards 50 to 52 that have been participating in the past, there was a problem that the conference was not smoothly operated.

[Means for solving problems]

The present invention solves the above problems by taking the following means.

That is, in the present invention, the display information storage means for storing the display information distributed and transmitted from the electronic blackboard on which the image is drawn to each of the other electronic blackboards is provided, and when a new electronic blackboard is entered in the middle of the meeting, After the display information accumulated in the display information accumulating means is transmitted to the electronic blackboard which is a newcomer, the conference is restarted.

It is considered that the display information storage means is provided in the conference device that distributes the display information sent from each electronic blackboard to each electronic blackboard participating in the conference telephone system.

[Action]

That is, according to the present invention, even on the electronic blackboard that entered during the conference, the same image as the image displayed on the other electronic blackboard that has been used for the participating conference from before is displayed,
The meeting will be run smoothly.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a diagram showing an electronic blackboard conference control system according to an embodiment of the present invention. The same reference numerals indicate the same objects throughout the drawings.

In FIG. 1, a storage device 26 is provided in the conference device 2.

In FIG. 1, it is assumed that the organizer 3 and the participants 41 and 42 are connected to the voice bridge circuit 23 via the channels ch1 to ch3 and the communication paths p1 to p3 and the conference is being performed.

During the meeting, the organizer 3 wishes to use the electronic blackboards 50 to 52 attached to the respective organizer 3 and the participants 41 and 42, and follows the special numbers for adding the electronic blackboards to the electronic blackboards 50 to 52. Telephone number dn assigned to the subscriber line connecting to the switching network 1
When 0 to dn2 are sequentially selected, the control device 21 receives the special number and the telephone numbers dn0 to dn2 via the PB receiver 24,
The electronic blackboards 50 to 52 are called from the channels ch4 to ch6 via the exchange network 1. When the organizer 3 and each of the participants 41 and 42 operate the communication buttons (not shown) provided on the electronic whiteboards 50 to 52, the controller 21 sets the call paths p4 to p6 in the time switch 22. , Channels ch4 to ch6 are connected to the connection terminals dbt1 to dbt3 of the data bridge circuit 25.

Further, the control device 21 sets the speech path p9 in the time switch 22 and stores it in the connection terminal dbt5 of the data bridge circuit 25.
Connect 26.

In this state, the data bridge circuit 25 is connected to the connection terminal db.
Display information arriving from t1 to dbt3 is displayed on each of the other connection terminals db.
It is distributed to t1 to dbt3 and also to connection terminal dbt5. The display information distributed to the connection terminals dbt1 to dbt3 is transmitted to the electronic blackboards 50 to 52 as described above to display the same image. On the other hand, the display information distributed to the connection terminal dbt5 is stored in the storage device 26 via the communication path p9. Therefore, all the display information relating to the drawing of the image displayed on the electronic blackboards 50 to 52 is stored in the storage device 26.

When a new participant 43 needs to join in the middle of the conference, and the organizer 3 selects the special number for additional participation and the telephone number of the participant 43 as described above, the control device 21 sets the channel ch.
7 calls the participant 43 through the switching network 1 and connects the participant 43 through the voice bridge circuit 23 by connecting to the connection terminal vbt4 of the voice bridge circuit 23 through the call path p7 in the time switch 22. It is possible to participate in the conference call.

Further, when the organizer 3 selects the telephone number dn3 assigned to the subscriber line connecting the electronic blackboard 53 to the switching network 1 following the special number for adding the electronic blackboard, the control device 21 performs the same process as described above. Call the electronic blackboard 53 and channel ch in the switching network 1.
8 and the connection path db8 in the time switch 22 to the connection terminal dbt4 of the data bridge circuit 25. When the connection of the electronic blackboard 53 is completed, the control device 21 once releases the communication paths p4 to p6 set in the time switch 22, and then is distributed to the storage device 26 via the data bridge 25 after the conference is held. , Extract all accumulated display information, and
p9, data bridge circuit 25, channel p8 and channel ch
It is transmitted to the electronic blackboard 53 via 8. The electronic blackboard 53 displays an image based on the transmitted display information. Therefore, the same image as that displayed on the electronic blackboards 50 to 52 up to now is displayed on the electronic blackboard 53.

When the transmission of the display information from the storage device 26 to the electronic blackboard 53 is completed, the control device 21 causes the once released communication paths p4 to p6.
Is again set in the time switch 22. Thereafter, the data bridge circuit 25 distributes the display information arriving from the electronic blackboards 50 to 52 to the electronic blackboard 53 and displays the same image as the image drawn on the electronic blackboards 50 to 52 on the electronic blackboard 53. Let

As is clear from the above description, according to the present embodiment, all the display information stored in the storage device 26 and transmitted from the electronic blackboards 50 to 52 that have already participated in the conference are displayed during the conference. Since the information is transmitted to the newly joined electronic blackboard 53, the same image as that displayed on the electronic blackboards 50 to 52 will be displayed on the electronic blackboard 53, and the participant 43 will not change from the beginning of the meeting. The image can be recognized and the conference can be operated smoothly.

It is to be noted that FIG. 1 is merely an embodiment of the present invention until the electronic blackboard 53 and the storage device 26 are connected to each other.
It is not limited to once releasing p8 to p6, and p4 to p6 are set as separate meetings for p8 and p9, and p8 is set after the display information is transmitted.
And connecting p9 to the original conference is also considered. As a result, coupled with the provision of the storage device 26 in the conference device 2, the route for transmitting the display information stored in the storage device 26 to the newly joined electronic blackboard 53 is displayed on the other electronic blackboards 50 to 52. It will be possible to establish it independently of the information transmission route, and the conference will continue smoothly. Further, the storage device 26 is not limited to one provided in the conference device 2, and it may be provided in the electronic blackboard (for example, 50), but the effect of the present invention does not change in such a case. A storage device such as an electronic blackboard 50
If it is provided in the electronic blackboard 50, the data board circuit 25
All display information distributed by is stored in a built-in storage device. After newly connecting the electronic blackboard 53 to the data bridge circuit 25, the control device 21 temporarily releases the communication paths p5 and p6, and displays the display information stored in the storage device built into the electronic blackboard 50 on the data bridge circuit. Electronic blackboard 53 through 25
To be transmitted to. The electronic blackboard 53 displays an image similar to that displayed on the electronic blackboard 50 based on the display information transmitted from the electronic blackboard 50, as in FIG. Further, the conference to which the present invention is applied is not limited to one including the organizer 3, the participants 41 to 43, and the electronic blackboards 50 to 53, and many other variations may be considered. In this case, the effect of the present invention does not change.

〔The invention's effect〕

As described above, according to the present invention, in the conference telephone system, the same image as that displayed on the other electronic blackboards that have participated before is displayed on the electronic blackboard that participated in the middle of the meeting. , The conference will be run smoothly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an electronic blackboard conference control system according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a conventional electronic blackboard conference control system. In the figure, 1 is a switching network, 2 is a conference device, 3 is an organizer,
41 to 43 are participants, 50 to 53 are electronic blackboards, 21 is a control device, 22 is a time switch, 23 is a voice bridge circuit, and 24 is a PB.
Receiver, 25 is a data bridge circuit, 26 is a storage device, ch1
To ch8 are channels, dbt1 to dbt5 and vbt1 to vbt4
Is a connection terminal, dn0 to dn3 are telephone numbers, p1 to p9 and pr
Indicates a communication path.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Oyabu 3-9-11 Midoricho, Musashino-shi, Tokyo Inside Nippon Telegraph and Telephone Corporation Musashino Telecommunications Research Laboratories (56) Reference JP-A-58-187055 (JP, A) ) JP-A-61-192154 (JP, A)

Claims (2)

[Claims] 1. Data for connecting and transmitting electronic blackboards at multiple points, and simultaneously distributing and transmitting display information corresponding to the drawn image transmitted from the electronic blackboard at one point to the electronic blackboards at the remaining points. In a conference telephone system in which a conference device having a bridge is attached to an exchange network, display information storage means for storing, for each conference, the display information distributed and transmitted from the electronic blackboard on which an image is drawn to each other electronic blackboard. In order to enter a new electronic blackboard in the middle of the meeting, the electronic blackboard which has been stored in the display information storage means is transmitted to the electronic blackboard called from the conference telephone system, An electronic blackboard conference control method characterized by connecting a blackboard to a data bridge and continuing the conference. 2. The electronic blackboard conference control system according to claim 1, wherein the display information storage means is provided in a conference device having the data bridge.