JPH02309386A - Screen control system for remote teaching system - Google Patents

Abstract

PURPOSE:To achieve effective teaching without increasing the number of monitors by switching a video signal from a remote station based on a switching instruction signal from an operating part and displaying a video on a monitor. CONSTITUTION:When the switching instruction signal is transmitted from the operating part 13 of a studio station 1, a master controller 14 transmits a switching signal to a sound/video transmitter 8, and simultaneously transmits the switching instruction signal to a remote controller 15. The transmitter 8 inputs the switching signal and instructs to display video signals from the remote stations 2 and 3 on the monitor 11. The remote controller 15 receives a switching request signal and transmits a screen switching request signal to a video switch 16. Consequently, the video switch 16 changes over video signals transmitted from the sound/video transmitters 26 and 24 of the remote stations 2 and 3 and displays them on the monitor 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a screen control method in a distance education system, and more particularly to a screen control method for controlling switching between lecturer videos and student videos displayed on a monitor.

[Prior Art] Conventionally, in the screen control method of this type of distance education system, student images from the remote station are displayed on the monitor of the studio station.
The monitor of the remote station is controlled so that the lecturer video of the studio station is displayed. Then, when the instructor at the studio station asks students at the remote station to speak and the student at the remote station speaks, the monitors of other remote stations display the video of the student speaking. There is.

[Problems to be Solved by the Invention] With the screen control method of the conventional distance education system described above, when the instructor is interacting with the questioner, that is, the student who spoke, the audio is not heard by the instructor at other remote stations. It felt strange because while I could hear the voice of the student who spoke and the voice of the student who spoke, the monitor only displayed the video of the remote station to which the student who spoke belonged. Additionally, if the instructor answers the questioner using a blackboard, etc., students at other remote stations cannot see the video from the studio station, so they may not be able to understand how the instructor explained and answered the question. There was a problem of not being able to provide efficient education. Additionally, if you try to display both the lecturer video and the student video on separate monitors in order to solve the above problems, the number of monitors will increase, which will cause problems in terms of space and cost savings, and students will There was also the problem that the images were difficult to view because they had to be viewed on many monitors.

[Means for Solving the Problems] In order to solve such problems, the screen control method of the distance education system according to the present invention is such that a studio station transmits audio signals and video signals, and receives video signals. At this time, the first transmission device plays back the video signal and sends it to the monitor of the studio station for display based on the switching signal, and the remote station transmits the audio signal and the video signal, and the video signal is transmitted to the remote station. a second transmission device that reproduces and transmits the video signal when the signal is received; a receiving device that is located at a remote station that receives the audio signal and the video signal, and reproduces and transmits the received video signal; A video switching device located at the remote station that switches the video signal sent from the second transmission device and the receiving device based on the screen switching request signal and sends it to the monitor of the remote station for display, and a video switching device located at the studio station. a master controller that sends a switching signal to the first transmission device based on the switching instruction signal and also sends a switching request signal to the remote station; and a video switching device that receives the switching request signal at the remote station. This device includes a remote controller that sends out a screen switching request signal to the master controller, and an operation section located in the studio station that sends out a switching instruction signal to the master controller.

[Operation] When a switching instruction signal is sent from the operation unit, the master controller sends a switching signal to the first transmission device, and also sends a switching request signal to the remote controller. Then, the first transmission device inputs this switching signal and displays the video signal of the remote station on the monitor. Further, the remote controller receives the switching request signal and sends the screen switching request signal to the video switching device. As a result, the movie switching device switches the video signals sent from the second transmission device and the receiving device, and displays the video signals on the monitor.

[Embodiment] Next, the present invention will be explained with reference to the drawings. Fig. 9 is a block diagram showing an embodiment of the screen control method of the distance education system according to the present invention.

In the figure, 1 is a studio station, 2.3 is a remote station,
4 is the satellite ground station of studio station 1, 5 and 6 are remote station 2
satellite ground station, 7 is satellite, 8 is studio station 1 audio/'
A video transmission device (first transmission device), 9 is a camera that shoots lecturer video, 10 is a monitor on which student video is displayed, 11
12 is a microphone for the instructor, 12 is a speaker through which students' voices can be heard, 13 is an operation unit that instructs the remote station 2.3 to switch the video signal, 14 is a master controller, 15 is a remote controller, and 16 is a remote A video switcher 17 switches video signals for stations 2 and 3; an audio mixing selector 17 cuts off the audio of the own station and selects and synthesizes the audio of other stations; 18 a radio wave signal transmitted by the lecturer; 19.20 is a radio signal transmitted by the student, 21.22 is a ground line, 23 is a monitor on which instructor video/student video is displayed, 24 is a receiving device that exclusively receives audio signals and video signals, and 25 is a receiver for instructor's audio and video signals. A speaker through which the student's voice can be heard, 26 a video/audio transmission device (second transmission device) that sends and receives student video signals and student audio signals from the remote station 2.3, 27 a camera that shoots student video, 28 is a microphone for students.

And studio station 1. Both remote station 2 and remote station 3 are each provided with two monitors and a camera.
For example, if one camera of the studio station 1 captures an instructor video, and the other camera 9 captures a calligraphy image, the instructor video will be displayed on one monitor 23 of the remote station, and the calligraphy image will be displayed on the other monitor 23. Ru.

Next, the operation of the configuration of the above embodiment will be explained. The lecturer video signal of studio station 1 and the microphone 11 were photographed by the camera. What is the lecturer audio signal via the audio/video transmission device 8?
will be sent to. This audio/video transmission device 8 inputs the signals, multiplexes them, and transmits them to the satellite ground station 4. The satellite ground station 4 transmits this signal as a lecturer transmission radio signal 18 to the satellite ground stations 5 and 6 via the satellite 7. Then, the satellite ground station 5.6 receives this instructor-transmitted radio wave signal 18 and transmits it to the receiving device 24 of the remote station 2.3, respectively. The receiving device 24 of the remote station 2 that received this reproduces this received signal, and this lecturer video signal is displayed on one monitor 23 of the two monitors via the video switch 16, and the lecturer audio signal is displayed on one monitor 23 of the two monitors. is heard on the speaker 25 via the audio mixing selector 17. The reception operation of the remote station 3 is also similar to the above.

Further, the student video signal photographed by the camera 27 of the remote station 2 and the student audio signal via the microphone 28 are sent to the audio/video transmission device 26. This audio/video transmission device 2
6 inputs this, multiplexes it, and transmits it to the satellite ground station 5. The satellite ground station 5 converts this signal into a student emitted radio wave signal 19.
The signal is transmitted via the satellite 7 to the satellite ground station 4.6. The satellite ground station 4 that received this one student-originated radio signal transmits it to the audio/video transmission device 8 of the studio station 1, and the audio/video transmission device 8 receives it and plays it back. The student video signal is displayed on one of the two monitors 10, and the student audio signal is heard through the speaker 12. In addition, the satellite ground station 6 that received this student-transmitted radio wave signal 19
Then, this is transmitted to the audio/video transmission device 26 of the remote station 3, which receives it and plays it back, and this student video signal is sent to the 2nd station via the video switch 16.
displayed on the other monitor 10. Further, the student video signal and student audio signal of the remote station 3 are also processed in the same manner as described above, and the satellite ground station 4.
and studio station 1. This is received by remote station 2, and the student video signal is displayed on the other of the two monitors, which is different from the one above, and the student audio signal is displayed on speaker 1.
It will be heard on 2.25.

Next, the detailed operation of video switching will be explained. In the case of a normal lecture, when the instructor of the studio station 1 operates the operating unit 13 to enter the lecture mode, the operating unit 13 sends this operated switching instruction signal, that is, a lecture mode signal to the master controller 14. do. Based on this signal, the master controller 14 sends a switching request signal to the remote controller 15 of the remote station 2.3 via the terrestrial line 21.22, and also sends a switching signal to the audio/video transmission device 8 to switch the two monitors. The student images of remote stations 2 and 3 are displayed on each of remote stations 10 and 10. On the other hand, the remote controller 15 that has received the switching request signal transmits the switching request signal to the receiving device 24. The audio/video transmission device 26 and the audio mixing selector 17 are controlled to send the lecturer audio signal to the speaker 25, and a screen switching request signal is sent to the video switch 16 so that the studio station is displayed on each of the two monitors 23. 1 to display the various images. As a result, the video switching device 16 sends, for example, the lecturer video signal of the studio station 1 via the receiving device 24 and the audio/video signal of the studio station 1 via the video transmission device 26 to each of the two monitors 23. The lecturer video is displayed on one of the two monitors 23, and the calligraphy image of the studio station 1 is displayed on the other.

Next, when in such instructor mode, if the instructor receives a question from a student at remote station 2, and the student speaks, the instructor at studio station 1 will control the operation section so that the instructor at studio station 1 returns to question mode at remote station 2. 13 is operated. And the operation section 13
is this manipulated switching instruction signal, that is, remote station 2
The inquiry mode signal is sent to the master controller 14. Based on this signal, master controller 14 transmits a switching request signal to remote controller 15 of remote station 2.3 via ground line 21.22. The remote controller 15 of the remote station 3 that received this switching request signal
is the receiving device 24. The audio/video transmission device 26 and the audio mixing selector 17 are controlled to transmit the lecturer audio signal and the remote station 2.
A student audio signal is sent to the speaker 25, and an image switching request signal is sent to the video switch 16, so that the instructor video from the studio station 1 and the student video from the remote station 2 are displayed on each of the two monitors 23. Let them do it. As a result, the video switching device 16 switches the lecturer video signal from the studio station 1 via the receiving device 24 and the student video signal from the remote station 2 via the audio/video transmission bag W26 so that they are displayed on two monitors. The instructor video is displayed on one of the two monitors 23, and the student video from the remote station 2 is displayed on the other. Note that, at this time, the remote controller 15 of the remote station 2 does not perform video signal switching control even if it receives the interrogation mode signal of the remote station 2. Therefore, at this time, the two monitors of remote station 2 are
A lecturer video and a calligraphy image are displayed respectively. Furthermore, by operating the operating unit 13 by the instructor at the studio station 1, the instructor video can be displayed on all the monitors at the remote station 3, and the student video at the remote station 2 can also be displayed.

Furthermore, the case where the student at the remote station 3 speaks is also the same as described above. That is, at this time, by the instructor operating the operation unit 13, the instructor video and the student video from the remote station 3 are displayed on each of the two monitors of the remote station 2.

By operating the operating unit 13 in this manner, the instructor can freely control switching of the images displayed on the monitors 23 of the remote stations 2 and 3.

[Effects of the Invention] As explained above, the present invention relates to the present invention. The image control method of the distance education system is configured such that the video switcher switches the video signals coming from the second transmission device and the reception device and displays them on the monitor based on a switching instruction signal from the operation unit. Therefore, the students at the remote station can comfortably see the images of the studio station and the remote station to which the student who spoke belongs, and the effect is that efficient education can be carried out without increasing the number of monitors.

[Brief explanation of the drawing]

The figure is a block configuration diagram showing one embodiment of a screen control method of a distance education system according to the present invention. 1... Studio station, 2, 3... Remote station, 4
,5.6...Satellite ground station,7...Satellite,8,2
6...Audio/video transmission device, 9.27...Camera, 10.23...Monitor, 11.28...
Microphone, 12゜25...Speaker, 13...Operation unit, 14...Master controller, 15...
Remote controller, 16...Video switch, 17
...Voice mixing selector, 18...Lecturer's transmitted radio wave signal, 19.20...Student's transmitted radio wave signal, 21.22
...Terrestrial line, 24...Receiving device,

Claims (1)

[Claims] Transmission is performed between one studio station and a plurality of remote stations via a satellite communication line, and the received audio and video signals are displayed on speakers and monitors provided at each of these stations. In the screen control method of the distance education system, the audio signal and the video signal are transmitted in the studio station, and when the video signal is received, the video signal is played back and the monitor of the studio station is controlled based on the switching signal. a first transmission device that transmits the audio signal and the video signal to the remote station for display; and a second transmission device that is located at the remote station and transmits the audio signal and the video signal, and when the video signal is received, reproduces and transmits the video signal. a receiving device located at the remote station that receives the audio signal and the video signal and reproduces and transmits the received video signal; and a receiving device located at the remote station that receives the audio signal and the video signal and reproduces and transmits the received video signal; a video switching device that switches the video signals sent out from the transmission device and the reception device and sends the video signals to the monitor of the remote station for display; a master controller that sends a switching signal to the device and a switching request signal to the remote station; and a master controller that receives the switching request signal at the remote station and sends a screen switching request signal to the video switch. A screen control method for a distance education system, comprising: a remote controller; and an operation section located in the studio station and configured to send a switching instruction signal to the master controller.