JPH02244186A - Av control system of education system using personal computer - Google Patents

Abstract

PURPOSE:To allow the easy effective utilization of video apparatus to the education system using personal computers by constituting the screen to be displayed on the student side personal computer in such a manner that the selection of the video from the video apparatus and the display screen of the teacher side personal computer is controlled from the teacher side personal computer. CONSTITUTION:The command outputted by the teacher side personal computer 10 is inputted by an LAN (local area network) to a command interpreting section 24 of the student side personal computer 20 which applies a control signal to a signal selecting section 26. The analog signal selected in accordance with this control signal is displayed on a display part 29 of the student side personal computer 20. This display section 29 digitally converts the analog signal of the display screen in an A/D converting section 27 and transmits the same to the teacher side personal computer 10. The teacher side personal computer 10 controls the display screen of the student side personal computer 20 including the video display of the video apparatus 40. The easy and effective utilization of the video apparatus 40 to the education system using the personal computers is possible in this way.

Description

[Detailed description of the invention] [Table of contents] Overview Industrial field of application Prior art (Figure 3) Means for solving the problems to be solved by the invention (Figure 1) Working examples (Figure 2) ) Effects of the invention [Summary] The present invention provides automatic visual (
Regarding the control method (hereinafter referred to as AV), we provide an AV control method that allows the teacher's personal computer to control the display screen of the student's personal computer, both the image of the video equipment and the display screen of the teacher's personal computer. For this purpose, in an educational system using personal computers, video equipment connected to the teacher's personal computer and the student's personal computer is provided, and
The student's personal computer is equipped with a digital/analog conversion means for converting the video input signal into analog, a digital/analog converting means for converting the digital signal displayed on the screen of the teacher's personal computer, and a command sent from the teacher's personal computer. A command decoding means for decoding a command, a signal selection means for selecting both of the above-mentioned analog signals according to the command, and an analog/digital conversion means for digitally converting the display screen signal of the student's personal computer are provided.

[Industrial application field]

The present invention is an AV system in an educational system using a personal computer.
Regarding the control method, in particular, an AV control method that allows the teacher's computer to control the selection of whether the display screen of the student's computer is an image from a video device such as a video device or the display screen of the teacher's computer. Regarding.

[Conventional technology]

Even in conventional educational systems using personal computers, the teacher's personal computer controls the screen display of the student's personal computer. In this case, when video equipment other than a personal computer is used as a teaching material, conventional video equipment is connected independently to the teacher's personal computer.

Therefore, the selection of whether to display the image from the video equipment on the screen of the student's computer or to display the screen of the teacher's or student's computer was made by manually connecting each line.

FIG. 3 shows a block diagram of a conventional example.

In FIG. 3, a teacher's personal computer 50 has a display section 51 such as a cathode ray tube (hereinafter referred to as CRT), a keyboard (hereinafter referred to as KB) 52, etc., and a display section 61 such as a CRT.
The student computer 60, which has a KB62 etc., is connected to a local area network (hereinafter referred to as LA), which is a digital line.
N).

Therefore, the display screen of the student's computer 60 can be controlled by the teacher's computer 50 using the LAN.

However, the video equipment 70 is connected to the student's computer 60, for example, manually, and the teacher's computer 50
It cannot be controlled by 0.

[Problem to be solved by the invention]

Therefore, when displaying images from the video device 7° on the student's computer 60, it was necessary to manually connect the video device 70 to the student's computer 60. Since it was not possible to control the connected video equipment from the teacher's personal computer 50, it was difficult to construct an educational system in which the teacher's personal computer controlled the images of the video equipment 70.

Therefore, an object of the present invention is to enable, in an educational system using a personal computer, a teacher's personal computer to control the display screen of a student's personal computer, both video equipment images and teacher's or student's personal computers. This provides an AV control method.

[Means to solve the problem]

In order to achieve the above object, the present invention, as shown in FIG.
The student computer 20 and the video device 4o are connected, and the teacher computer 10 and the video device 40 are also connected.
These systems are connected by, for example, a LAN.

Inside the student computer 20, there is a digital/analog converter (hereinafter referred to as D) that converts video human input signals into analog signals.
/A converter) 22, a D/A converter 25 that converts digital signals for display on the screen of the teacher's personal computer 10 into analog signals, a command decoder 24 that decodes commands input from the LAN, and a D/A converter. A signal selection section 26 selects the analog signals converted in steps 22 and 25 according to a control signal from the command decoding section, and a display screen of the student's personal computer 20 for the teacher's personal computer 10 to monitor the display screen of the student's personal computer 20. An A/D converter 27 that converts analog signals into digital signals is provided.

Note that 11 is the display section of the teacher's personal computer, 12 is the KB of the teacher's personal computer, 29 is the display section of the student's personal computer, and 30 is the KB of the student's personal computer.

[Effect]

A video input signal input from the video equipment 40 to the student's personal computer 20 is converted into analog by the D/A converter 22 and input to the signal selector 26.

Further, the digital color screen display signal input from the teacher's personal computer 10 is also converted into analog by the D/A converter 25 and input to the signal selector 26.

On the other hand, this system is connected by a LAN, and commands output from the teacher's computer 10 are input to the command decoder 24 of the student's computer 20 via the LAN, decoded here, and sent to the signal selector 26. Give control signal. The analog signal selected according to the control signal is displayed on the display section 29 of the student's personal computer 20.

The display section 29 of the student's personal computer 20 converts the display screen analog signal into a digital signal by the A/D converter 27 and sends it to the teacher's personal computer 10. Thereby, the display screen of the student's personal computer 20 can be monitored by the teacher's personal computer 10.

In this way, the teacher's personal computer 10 can control the display screen of the student's personal computer 20, including the image display of the video equipment, via the LAN.

〔Example〕

An embodiment of the present invention will be explained in detail with reference to FIG. FIG. 2 is a block diagram of the configuration of one embodiment, showing an educational system using personal computers at a school.

In FIG. 2, the same reference numerals as in FIG. 1 indicate the same parts.

10 is the teacher's computer, 11' is the teacher's computer CR
12 is the KB of the teacher's computer, 13 is the interface section, 20 is the student's computer, 21 is the speaker, 22 is the D/A conversion section for the video input signal V, 23 is the LAN line control section, Reference numeral 24 indicates a command decoding section, and 25 indicates a D/A conversion section for display screen signals of the teacher's personal computer 10. 26 is a signal selection section for the video input signal and the display screen signal of the teacher's personal computer, which includes an AND circuit (a) 261, A
It is composed of an ND circuit <b> 26-2 and an OR circuit 26-3. The D/A converter 22 includes an AND circuit (
a) In 26-1, the D/A converter 25 is an AND circuit (b)
At 26-2, the command decoder 24 is connected to both AND circuits.

27 is an A/D conversion unit that converts the display screen analog signal of the student's computer into digital; 28' is a display screen control unit; 2
9' is a display section of the student's personal computer such as a CRT, 30 is a KB of the student's personal computer, and 40 is a video device.

The teacher's personal computer 10 is directly connected to the student's personal computer 20 and controls the display screen of the student's personal computer 20. At the same time, since the teacher's computer 10 is also connected to the video device 40 via the interface section 13, the display screen of the student's computer 20 is connected to the video device 4 using the LAN.
Images from 0 can also be controlled.

When displaying an image from a video device on the display screen of the student's computer 20, the teacher's computer 10 sends a video manual signal selection command from the LAN to turn on the AND circuit (a) 26-1 of the signal selection section 26. It is sent to the student computer 20.

In the student PC 20, this video input signal selection command that has passed through the line control section 23 is decoded by the command decoding section 24, and sent to the AND circuit 26-1 of the signal selection section 26.
J is output, and rOJ is output to the AND circuit 26-2.

As a result, the OR circuit 26-3 becomes the AND circuit (a)'2
Display screen control section 28 displays the video input signal that has passed through 6-1.
', and the video from the video device is displayed on the display unit 29' of the student's personal computer 20.

Next, change the display screen of the teacher's computer 10 to the student's computer 2.
0 display section 29', the teacher's personal computer 10 selects the AND circuit 26-2 of the signal selection section 26 from the LAN.
A display selection command from the teacher's personal computer that turns on the AND circuit 26-1 and turns off the AND circuit 26-1 is sent to the student's personal computer 20.

In the student's computer 20, the screen display selection command of the teacher's computer that has passed through the line control section 23 is decoded by the command decoding section 24, and the AND circuit 26-
A control signal is sent to turn on the AND circuit 26-1 and turn off the AND circuit 26-1.

As a result, the OR circuit 26-3 sends the screen display signal of the teacher's personal computer that has passed through the AND circuit 26-2 to the display screen control section 28', and the display screen 29 of the student's personal computer 20.
′ displays the teacher's computer screen.

In the absence of any of these input sources, the display screen 29' of the student's personal computer 20 displays an internal display screen.

This operation is performed by an internal display screen control section (not shown).

In addition, the display screen of the student's computer is always output to the teacher's computer so that it can be monitored by the teacher's computer. The display screen signal of the student's personal computer 20 sent from the display screen control section 28' is digitally converted by the A/D converter 27 and output to the teacher's personal computer 10.

In the above description, a case has been described in which no sound is output from the video equipment, but even when sound is output, a similar control circuit can be provided and control from the teacher's personal computer 10 can be performed.

〔Effect of the invention〕

According to the present invention, in an educational system using a personal computer, the teacher's personal computer can freely control the display screen of the student's personal computer, the teacher's personal computer's display screen, and images from video equipment. .

Therefore, it has become easier than ever to utilize video equipment in an educational system using a personal computer.

This will contribute to the use of personal computers in educational systems.

4.--Command decoding section, 5.-D/A conversion section, 6-signal selection section; 7... A/D converter 1. 9-...Display screen of student computer, O...Video equipment.

Patent applicant: Fujitsu Limited Representative Patent Attorney Akijo Yamatani

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention, FIG. 2 is a block diagram of the configuration of an embodiment of the present invention, and FIG. 3 is a block diagram of the configuration of a conventional example. 10--Teacher's computer, 20-Student's computer, 22--D/A converter, ζ [N Shima]

Claims (1)

[Claims] In an educational system using personal computers, video equipment (4) connected to a teacher's personal computer (10) and a student's personal computer (20) is provided.
At the same time, the student's personal computer (20) is equipped with a digital/analog conversion means (20) for converting the video input signal into analog.
22), digital/analog conversion means (25) for converting digital signals displayed on the screen of the teacher's personal computer (10) into analog, and command decoding means (24) for decoding commands sent from the teacher's personal computer (10). ), signal selection means (26) for selecting both of the above analog signals according to a command, and analog/digital conversion means (27) for digitally converting the display screen signal of the student's personal computer (20).
), and the teacher's personal computer (10) controls the selection of the screen displayed on the student's personal computer (20) between the image from the video equipment (40) and the display screen of the teacher's personal computer (10). An AV control method characterized by: