KR200229433Y1 - Realtime control system for multimedia network - Google Patents

Abstract

The present invention can be utilized for language education by fully supporting screen control and transmission of video and audio between teacher (server) and student (client) in real time, especially when using presentations such as lectures and presentations using moving images. The present invention relates to a multimedia network real-time transmission control device that transmits real-time video and voice data without congestion even when sending video data to dozens of clients.

As a means for achieving the present invention, the teacher terminal 10 and the student terminal 40 connecting a plurality of terminals in a plurality of lines constitute a network having a bus-type structure by the multimedia dedicated cable 50, the teacher terminal 10 and the student terminal 40 is characterized in that it comprises a respective controller (20, 42).

Description

Multimedia network real-time transmission control device {Realtime control system for multimedia network}

The present invention relates to a multimedia network real-time transmission control device using a computer, and more specifically, it is possible to utilize the language control by fully supporting real-time transmission and reception of video and audio and screen control between a teacher (server) and a student (client). In particular, the present invention relates to a real-time transmission control device that transmits a large amount of moving image voice data to dozens of clients in real time without congestion of the screen and voice when used for presentations such as lectures and presentations using moving images. The rapid spread of the software and the development of various softwares has led to a rapidly growing population, and faced a very difficult situation in which to work without a computer. The required situation . Such a computer-based curriculum has a problem in that the educational effect is very low to deliver contents to the educated subjects in a classic teaching method such as text-oriented explanations. Increasingly, educational sites using projectors are spreading at high prices. However, even in this case, it is difficult to smoothly deliver the contents of education to the trainees by means of illuminance, concentration, communication means, and one-way information transmission.

Currently, most schools, academies, and companies use computers to educate and form / install a network via a LAN. If you configure the network as described above, you can not know what the specific client (student) is currently doing from the point of view of the server (educator), the advantage of sharing data, and from the client's point of view When there is a question about the contents, the problem is that the person in charge (educator) needs to come to the client's seat to identify the problem. Not only have problems such as discontinuity of the screen due to LAN speed and congestion, but also have incompatible compatibility with user programs and differences in operating system. In addition, the disadvantage of the software is the real-time transmission of a large amount of data, such as video transmission Because of this problem, there is a problem such as maintaining the static state of the screen according to the speed and congestion of the LAN.The biggest disadvantage is compatibility with the user program and incompatibility with the operating system (Windows, Liunx, Unix). There are also a lot of problems with older computers that can run slowly or not at all.

In order to solve the above problems, the present invention can be utilized in language education by fully supporting the screen control between the server and the client and the transmission and reception of video and audio in real time, especially presentations such as lectures, presentations using moving images Its purpose is to enable real-time transmission of video and audio without the congestion of the screen even when sending a large amount of moving picture voice data to dozens of clients. It is designed to handle the sending and receiving of voice in real time.

1 is a block diagram showing the configuration of a multimedia network real-time transmission control apparatus according to the present invention.

2 is a state diagram of a multimedia network real-time transmission control apparatus according to the present invention is installed.

3 is a block diagram of the teacher controller analog signal processor of FIG.

4 is a block diagram of a teacher controller digital signal processor of FIG.

5 is a block diagram of the student controller of FIG.

6 is a flow chart of a multimedia network real-time transmission control device according to the present invention. * Explanation of symbols for the main part of the drawing * 10: Teacher terminal 20: Teacher controller 40: Student terminal 41: Terminator 42: Student terminal 50: Cable

As a means for achieving the present invention, a student terminal having a plurality of lines connecting a teacher terminal and a plurality of terminals is configured as a network having a bus-type structure by a multimedia dedicated cable, and the teacher terminal and the student terminal include respective controllers. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention provides a method for real-time delivery of multimedia information and education and contents of trainees in computer-based education. The degree of concentration can be improved, and it is designed to be easy to operate and to maintain the system. The implemented system is divided into a main controller and a student controller, as shown in FIGS. 1 and 2, and the overall configuration using the same is as follows. FIG. 1 illustrates a configuration of a multimedia network real-time transmission control apparatus according to the present invention. 2 is a state diagram in which the multimedia network real-time transmission control apparatus according to the present invention is installed. Referring to FIGS. 1 and 2, the student terminal (which connects the teacher terminal 10 and a plurality of terminals in a plurality of lines) is illustrated. 40 is configured as a bus structure by the multimedia dedicated cable 50, the teacher terminal 10 includes a teacher controller 20, and the student terminal 40 includes a student controller 42. By installing the teacher terminal 10 and the student terminal 40 to have a bus structure can be connected without a distribution device (Hub), can reduce the amount of cable In addition, the cable 50 has a characteristic impedance (75Ω) so that the impedances of the monitor and the VGA card are matched. The student terminal 40 connected to the plurality of lines has impedance, power, control line resistance values, etc. of the cable. In view of this, it is most preferable to configure approximately 25 terminals or less in series. In addition, the terminator 41 is installed at the end of the student terminal 40 so as to remove the reflected wave. The teacher controller 20 is provided with a switch box having a plurality of switches, and the user of the teacher terminal 10 The student terminal 40 can be designated by pressing a specific switch of the switch box, and the student terminal is formed into a group, and then configured to enable the conversation between the groups. On the other hand, the teacher controller 20 has an operating state of the system. And an analog signal processor for transmitting audio and video signals to a student terminal selected / specified by the teacher controller. FIG. 3 is an analog signal processor input to the teacher controller of FIG. 4 is a configuration diagram of a digital signal processor input to the teacher controller of FIG. 1. The analog signal processing unit will be described as shown in the drawing. First, the teacher controller 20 corresponds to an external image signal VGA or a screen of the teacher terminal 10 by the contact of the switch S1. In order to transmit to the student terminal 40, the user of the teacher terminal 10 selects some or all of the corresponding students in the switch (S1) provided in the teacher controller 20 to transmit. In addition, the monitor of the teacher terminal 10 outputs a video signal according to the contact operation of the switch S2. The video signal via the switch S1 is a video amplifier V1 and a plurality of RGB drivers D. Is inputted from the plurality of output ports P to the corresponding output ports through current amplification and impedance matching, and transmitted to the student controller 42 of the student terminal 40. The select mode 22 is also provided for the plurality of student applications. As a mode for feeding back the signal output to the terminal 40, the select mode 22 of the corresponding student terminal 40 is provided so that the user of the teacher terminal 10 feeds back a signal output to the specific student terminal 40. In the case of closing the contact of the terminal), the signal output to the corresponding student terminal 40 is provided to the input of the switch (S1), the feedback signal is the corresponding contact of the switch (S1), the video amplifier (V1) and the RGB driver ( Selected cranes via D) It is output for a terminal 40. Accordingly, the signal output to the student terminal 40 is fed back according to the contact point of the select mode 22 to enable the dialogue between the students and the dialogue between the groups. On the other hand, the audio signal input to the teacher controller 20 is provided. The microphone, the input of the external sound device and the voice signal provided to the student terminal 40 is mixed with the signal input through the mixer (Mixer 24) and then amplified by the audio amplifier (V2), for teachers The audio signal which is output to the headphone of the terminal 10 and composed of the dialogue between the students or the dialogue between the groups designated by the select mode 22 is provided to the output port P transmitted to the corresponding student terminal 40 and transmitted. Further, when the contents of the student terminal 40 are received, inquired, or controlled by using the monitor of the teacher terminal 10, the control target student terminal 4 can be added. Since the contents of 0) appear, the teacher terminal 10 may additionally install a reception-only monitor so that the contents of the teacher terminal 10 can be continuously viewed regardless of the control of the student terminal 40. FIG. The digital signal processing unit is input as a main controller of the digital signal processing unit as shown in FIG. 4 as follows. First, the digital signal processing unit of the teacher controller 20 is controlled by the one-chip microprocessor 32. The microprocessor 32 includes a display unit 27 for operating and alarming the entire system, a student terminal 40 connected to a plurality of lines connected to the teacher controller 20, and an operating state of the student terminal 40. Check mode 26 for confirming, the command button for selecting the function of the entire system, the number button for selecting the student terminal 40 and a plurality of student terminals 40 as a group It is transmitted to the interface unit 29 and the student terminal 40 that can control the student terminal 40 by using a switch box 25, such as a group setting button to be set, and a keyboard and a mouse of the teacher terminal 10. A controller 28 for controlling a signal is connected and configured. The check mode 26 connected to the microprocessor 32 is a switch box 25 for selecting a corresponding student of the student terminal 40 connected in a plurality of lines. Press to call or check the attendance status of the student by the check logic for checking the operation state of the student controller 42. In addition, the user of the teacher terminal 10 is all or part of the student Is selected as the switch box 25, the microprocessor 32 detects the contact of the switch box 25, the microprocessor 32 is controlled by the detected signal Check the connection state of the student terminal 40 through the monitor of the teacher terminal 10 through 28. As shown in FIG. 5 as a configuration diagram of the student controller of Figure 1, the student controller as shown in FIG. First, the student controller is connected in parallel to the RGB drive (D) to which the image (VGA) signal output from the teacher controller 20 is input in parallel on the line to reduce the attenuation of the signal and at the same time to shift the voltage level. It is configured to be an impedance, the video signal via the RGB driver (D) is output to the monitor of the student terminal 40. Preferably, the monitor of the student terminal 40 uses a twin monitor or a reception-only monitor. As a switch S3 for selecting an image signal input from the teacher controller 20 or an image signal input externally, The contact point of the switch S3 is controlled by the switch box 25 provided in the teacher controller 20. The image signal selected by the switch S3 is amplified and amplified by the video amplifier V3 and the RGB driver D. Impedance matching is achieved. The selected video signal is output to the monitor of the student terminal 40. In addition, as a switch (S4) for transmitting the signal output to the student terminal 40 to the outside, it is transmitted to the outside in accordance with the switch (S4) contact enables a conversation between students. The voice signal is mixed with the voice signal transmitted from the teacher controller 20 and the signal input from the student's own microphone and other external sound apparatus through the mixer unit 44, and the mixed voice signal is an audio amplifier. After amplifying through V4, a voice may be heard through the controller of the student terminal 40. The signal amplified by the audio amplifier (V4) is output so as to communicate with the teacher and many students by selecting the switch (S5) of the student terminal 42, input of an external recorder or other sound device as needed 6 is a flow chart of a multimedia network real-time transmission control apparatus according to the present invention, and the flow of the present invention as shown in FIG. 6 is as follows. First, the system is initialized by receiving external power. S102), and inputs a corresponding key value to be controlled through the teacher controller 20. When the key value is input, a command button, a numeric button, and a group button to be controlled by the screen of the teacher terminal 10 are output, and the user presses a required button to control the display. When the user presses the command button (S108), the command button is divided into seven functions. The broadcast mode is a function for transmitting a teacher screen or a student screen displayed on the teacher screen to all students. The mode disables all functions, the teacher screen allows the teacher computer, and the student monitor allows the student to view the contents of his or her own computer. . Receiving mode is a function to view the contents of the desired student as a teacher. The difference between the response function is that the student has the right to use the mouse and keyboard of the student computer, but the teacher has the response. Scan mode is a function that can automatically receive the screen while switching the specific student's screen. Reference mode is a function that allows a student who needs a teacher screen to select and view his / her own computer, and then refer to the teacher computer using a switch on the student controller. S110) The command button functions to operate the student controller of the selected number so that the corresponding command function is operated. Receiving and replying commands can select a single student terminal 40, and a transmission command can select a plurality of buttons. When the user presses the group button (S112), the plurality of student terminals 40 are grouped and transmitted. When selecting a plurality of terminals, such as a scan function, a group button can be used without pressing all the modes. The student controller 40 is controlled by the teacher controller 20 and the teacher controller 20. It is configured to transmit and receive video, audio, power, and control signals from, and to make a serial connection to the student controller 40 to be connected next time. As a result, a plurality of students can talk to each other, The teacher controller 20 can be transmitted to other student terminals, and the student terminal 40 can be controlled in various ways through the teacher controller 20. It equipped with the function.

As described above, the present invention can be utilized for language education by fully supporting real-time screen control and transmission of video and audio between the server and client regardless of the performance of the terminal, especially lectures and presentations using moving images. When used in presentations, even when sending a large amount of moving picture voice data to dozens of clients, it is possible to transmit in real time without congestion of the screen and the voice. By blocking the monitor, mouse, and keyboard of the entire student's computer, you can control to see and listen to only the contents of your lecture, maximizing the effectiveness of the class, and monitoring the contents of each student during individual practice. Can be randomly searched to increase the concentration of the class, It is possible to check whether there is a question, and when the student has a question, the educator can communicate with the screen and voice without coming to the student to maximize the effect of the education. It is easy to maintain, unaffected by computer models and operating systems, and has a very easy operation.

Claims (5)

The teacher terminal 10 and the student terminal 40 connecting a plurality of terminals in a plurality of lines constitute a network having a bus-type structure by a multimedia dedicated cable 50, and the teacher terminal 10 and the student terminal 40. The multimedia network real-time transmission control device, characterized in that it comprises a respective controller (20, 42). The multimedia network real-time transmission control device according to claim 1, further comprising a terminator (41) at the end of the student terminal (40) to remove the reflected wave. 2. The multimedia network real-time transmission control apparatus according to claim 1, wherein the student terminals (40) connected by a plurality of lines connect 25 terminals or less. According to claim 1, the teacher controller 20 is pressed by pressing the switch box 25 for selecting the student of the student terminal 40 connected in a plurality of lines through the check mode 26 connected to the microprocessor 32 Multimedia network real-time transmission control device, characterized in that to call the student, or to check the attendance status of the student through the operating state of the student controller (42). The method of claim 1, wherein a specific student terminal 40 is designated through a switch box 25 connected to the microprocessor 32 to form a plurality of groups, and the select mode 22 is selected from the plurality of groups. Through the input of the switch (S1) through the multimedia network, characterized in that the dialogue between the groups is made by outputting a screen of a specific group to the student terminal 40 between the other groups selected through the switch (S1) Real time transmission control device.