JPH0744609B2 - Multipoint remote conference device - Google Patents

Description

The present invention relates to a device for conducting a conference between a transmitting station and each remote station provided at multiple remote points by using a wide area transmission line such as a satellite line. It is a thing.

[Conventional technology]

When transmitting video and audio from a transmitting station to multiple remote points and performing educational broadcasting, as shown in the block diagram of FIG. 3, as shown in the conventional example, a wide area transmission line for a wide area such as a satellite line 1 Video and audio from the transmitting station 2 via the ground station 3
It is transmitted from -0, received by ground stations 3-1 to 3-n in various places, and given to each remote station 4-1 to 4-n.

[Problems to be Solved by the Invention] However, in the related art, since only the one-way wide-area transmission line 1 is used, if a failure occurs in this, the reception becomes impossible immediately, and the message from the remote station 4 side It is completely impossible, and it has drawbacks such as inability to ask questions and discuss.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention is configured by the above means.

That is, a one-way wide-area transmission line that connects between the transmitting station and each remote station, a two-way transmission line that connects between the transmitting station and each remote station, and the wide-area transmission of video and audio from the transmitting station. A transmitter that transmits to the line, a receiver that is provided for each remote station that receives video and audio via the wide area transmission line and sends them to the video monitor and speaker, and the audio of each remote station via the bidirectional transmission line. Both the speaker that emits into the transmitting station, the switching means that switches the wide-area transmission line or the bidirectional transmission line to send the sound from the transmitting station to the speaker of each remote station, and the utterance request of each remote station It is provided with means for transmitting and displaying the permission of the utterance request to the remote station via the bidirectional transmission line and for transmitting to the remote station via the bidirectional transmission line for display.

[Work]

Therefore, when the video and audio of the transmitting station are transmitted to each remote station via the wide area transmission line, the image is displayed on the video monitor and the sound is emitted from the speaker, and if the wide area transmission line fails. Is connected to the speaker of each remote station by the switching means via the bidirectional transmission line, and the transmission of only the sound is secured.

Further, the request for speech of each remote station is displayed at the transmitting station, and the permission for this is displayed at the remote station, and the voice of the speech due to this is emitted from the speaker in the transmitting station via the transmission line. Questions and answers, discussions, etc. between the transmitting station and the remote station can be freely performed.

〔Example〕

The present invention will be described in detail below with reference to FIGS. 1 and 2 showing an embodiment.

FIG. 2 is a block diagram of the entire configuration, in which the video and audio of the transmitting station 2 are transmitted by the ground station 3-0 via the one-way wide-area transmission line 1 using the satellite line of the high speed wide frequency band,
Although this is received by the ground stations 3-1 to 3-n provided in various places and given to each remote station 4-1 to 4-n, it is similar to FIG. Each remote station 4-1 to 4
In addition to the wide area transmission line 1 for connecting to -n, a bidirectional transmission line 5 using, for example, a four-line dedicated line or the like is provided. 1-4-n
Is connected to.

FIG. 1 is a block diagram showing the details of the transmitting station 2 and the remote stations 4-1 to 4-n. The content of the remote station is represented by the remote station 4-1 as a representative.

The transmission station 2 includes a video transmission device 2 such as a television camera.
1, a microphone 22 and a speaker 23 are provided, and the video from the video sending device 21 and the sound from the microphone 22 are sent to the ground station 3-0 via the sending device 24, whereby the communication satellite 11 is configured. The transmission to the wide area transmission line 1 is performed.

This transmission is received by the ground stations 3-1 to 3-n in each place and given to each remote station 4-1 to 4-n.
The receiving device 41 separates the video and audio, and the video is sent to the video monitor 42, while the audio is given to the operation panel 44 via the switch 43 and sent to the speaker therein.

In addition to the speaker, the operation panel 44 has a microphone,
An indicator lamp, a switch, etc. are provided, and when the switching switch of these is operated, the switching device 43 responds and the bidirectional transmission line 5-1.
The microphone 22 of the transmitting station 2 transmitted via the downlink is connected to the speaker of the operation panel 44.
Sound is emitted from the speaker.

Therefore, if a failure occurs in the wide area transmission line 1, the transmission line 5 backs up the voice transmission, and only the voice can be heard.

Further, for example, when a student of the remote station 4-1 requests the lecturer of the transmitting station 2 to speak, when the speech request switch of the operation panel 44 is operated, the signal generator 45 generates a signal of a specific frequency, for example. Then, the signal is sent to the up line of the transmission line 5, which is received by the signal receiver 25-1 of the transmitting station 2, and the received output turns on the corresponding indicator light of the instructor operation panel 26. , If the teacher allows this, operate the corresponding switch and the signal generator
27-1 responds to generate a signal similar to the signal generator 45 and send it to the downlink.

Then, this is received by the signal receiver 46 of the remote station 4-1 and the message output of the operation panel 44 is turned on by this received output. Therefore, if the student makes a statement such as a question in response to this, this message is displayed. Voice is sent to the up line via the microphone of the operation panel 44.

Further, when the utterance allowance switch of the operation panel 26 is operated, the switch 28-1 responds and the upstream line is connected to the speaker 23, so that the voice of the student is emitted from the speaker 23.

When canceling the utterance request, by operating the cancel switch of the operation panel 44, the signal generator 45 generates and sends out a signal of another frequency, and the signal receiver 25-1
After receiving, the corresponding indicator light is turned off.

Similarly, it is also possible to cancel the permission to speak.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, a bidirectional transmission line is used in addition to a one-way wide-area transmission line, thereby transmitting the voice of the transmitting station and also transmitting the voice of each remote station. In addition, by providing a means for displaying the remote station's request for speech at the transmitting station and a means for displaying at the remote station permission for the request for speech, transmission of only voice is ensured even when the wide area transmission line fails. At the same time, questions and answers, discussions, etc. can be freely made by statements from remote stations, and a remarkable effect can be obtained in education, conferences, etc. targeting remote points.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a block diagram showing the details, and FIG. 2 is a block diagram of the entire structure.
FIG. 3 is a block diagram showing a conventional example. 1 ... Wide area transmission line, 2 ... Transmission station, 3-0 to 3-n ...
… Ground station, 4-1 to 4-n …… Remote station, 21 …… Video transmission device, 22 …… Microphone, 23 …… Speaker, 24 …… Transmission device, 25-1 to 25-n, 46 …… Signal receiver, 26,44 ...
Control panel, 27-1 to 27-n, 45 ... Signal generator, 28-1 to 28
-N, 43 ... Switch, 41 ... Receiver, 42 ... Video monitor.

Claims (1)

[Claims] 1. A unidirectional wide area transmission line connecting between a transmitting station and each remote station provided at multiple remote points, and a bidirectional transmission line connecting between the transmitting station and each remote station. A transmitting device for transmitting the video and audio of the transmitting station to a wide area transmission line, and a receiving device provided for each remote station for receiving the video and audio via the wide area transmission line and sending them to a video monitor and a speaker. , A speaker that emits the voice of each remote station into the transmitting station via the bidirectional transmission line, and one of the wide area transmission line and the bidirectional transmission line is switched to output the voice from the transmitting station to each remote station. Switching means for sending to the speaker of the station, means for transmitting and displaying the speech request of each remote station to the transmitting station via the bidirectional transmission line, and the bidirectional transmission line for permitting the speech request To the remote station via Multipoint teleconference apparatus comprising the means for and view.