KR100794497B1 - Transmission system over a multimedia network - Google Patents

Abstract

A multimedia network transmission system is provided to connect more client terminals to a single host terminal by lengthening a transmission distance among the host terminal and the plurality of client terminals by using a long-distance communication interface. A host controller(11) remotely controls to write on a selectively displayed screen of a plurality of client terminals or on a screen of at least one of the plurality of clients terminals and controls transmission/reception of an image or voice signal according to a select signal from a user. A host image processing controller(12) converts an external image signal into an RGB type image signal, and transmits the same to the client terminal. A host communication interface(13) performs bi-directional data communication with the client terminal. A host input signal converting unit(16) converts a long-distance input signal via an external input device into a long-distance communication signal, and outputs the same to the host communication interface(13). A host voice and image transmitting unit(17) transmits an image signal and a voice signal to the plurality of client terminals.

Description

Transmission system over a multimedia network

The present invention relates to a multimedia network transmission system, and more particularly, a host (host) in the process of discussing a question or other discussion in a computer room, a classroom, a conference room, or the like, in which a host terminal (server) and a plurality of client terminals (clients) are networked. It handles the screen control between the terminal 200 and the participant (client terminal 400) and the transmission and reception of video and audio in real time, and simultaneously controls the automatic broadcasting, the automatic reception, the reception permission, and the controller between the host and the participant. The present invention relates to a multimedia network transmission system that implements a bidirectional writing function between a host and a client.

Recently, the majority of schools, academies, and companies use a computer to educate students by building a network on a LAN and configuring the data to be shared on the network.

As described above, a conventional network system that configures a plurality of computers into a network by a program is as shown in FIG.

1 and 2 is a simplified diagram showing a conventional multimedia transmission system.

Referring to Figure 1, the main terminal 100 (personal computer) and the auxiliary terminal 300 (personal computer) connected in a plurality of lines as a plurality of terminals is configured to have a bus-type structure by a multimedia dedicated cable, the main terminal The host terminal 200 and the auxiliary terminal 300 includes a client terminal 400 in the (100). In addition, the host terminal 200 is provided with a serial port capable of data communication, such as the Internet, the user of the external main terminal 100 by the external terminal capable of data communication, such as the Internet of the host terminal 200 It transmits a control signal corresponding to each button to the main terminal 100 is configured to remotely control from the outside.

In addition, the cable 500 is installed to have a characteristic impedance so that the impedance of the monitor and the graphics card is matched. The auxiliary terminal 300 connected to the plurality of lines 500 is configured to serially configure the terminal in a bus-type structure such as the impedance, power, and control line resistance of the cable, and installs an intermediate amplifier as necessary to install the auxiliary terminal. Additional 300 can be added. A terminator is installed at the end of the auxiliary terminal 300 so as to remove noise caused by the reflected wave.

The host terminal 200 includes a switch box having a plurality of switches, and a user of the main terminal 100 presses a specific switch of the switch box to select a corresponding sub terminal or a plurality of sub terminals. In this case, the plurality of client terminals 400 may be selected as a plurality of groups.

The switch box includes a switch divided into a plurality of groups for selecting each of the plurality of client terminals 400. Here, the switch includes a switch for selecting a function of searching, transmitting, helping, controlling, receiving, releasing, and broadcasting a plurality of auxiliary terminals 300 or each of the auxiliary terminals classified into groups.

In particular, the broadcast switch is a function for transmitting the screen of the presenter himself / herself or the screen showing the appearance of a specific participant to the whole participant in a lecture or conference room, and the release switch releases all functions to the initial state. The host and the participant can view the contents of their computer, and the transmission switch is the function to send the participant's computer contents or the screen of the participant's computer to the desired participants. However, the transmitting function is transmitted only to the auxiliary terminal 300 selected through the main controller.

In addition, the receiving switch allows the presenter to view the contents of a specific participant. The difference with the control selection switch is that the participant has the mouse and keyboard permission of the participant computer, but the teacher has the control. Switch is a function that can be received while automatically converting the screen of a specific participant. The help switch is a function that a participant who needs the presenter's screen can select and view his / her own computer and can refer to the presenter's computer as a screen by using a switch in the client terminal 400.

2, the video and audio signals output from the DVD and the VTR are converted into RGB video signals and transmitted and received. The host terminal 200 and the client terminal as described above are provided. 400 is not included in the conversion configuration of the video and audio signals to the RGB signal as described above, the signal conversion of the RGB method through the main terminal 100 and the auxiliary terminal consisting of a computer is made.

Therefore, in the related art, in order to transmit and receive a writing function and an external video / audio signal, a configuration of the main terminal 100 consisting of a computer is necessary in addition to the host terminal 200 and the client terminal 400, thereby increasing manufacturing and supply costs. .

In addition, the conventional multimedia transmission system uses a PS / 2 method of telecommunication for remote control including a writing function of a user's input device, for example, an auxiliary terminal, as an input signal through a writing function. As the transmission distance increases, the loss of data increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a multimedia network transmission system capable of transmitting and receiving data in a host terminal and a client terminal period without a personal computer in a multimedia transmission system. For the purpose of

An object of the present invention is to provide a multimedia network transmission system having a long distance communication interface to increase the transmission distance between a host terminal and a plurality of client terminals, so that more client terminals can be connected to one host terminal.

The present invention includes the following examples in order to achieve the above object.

In a first embodiment of the present invention, a plurality of client terminals are configured to transmit and receive video and audio signals selectively input from the outside, and each of the client terminal screen is configured to be connected to implement the remote control and writing function In the multimedia network transmission system, The host terminal and the host control unit for controlling the remote control for the writing function and the transmission and reception of video and audio signals in accordance with the user's selection signal; A host image processing controller for converting an external image (VTR / DVD) signal into an RGB image signal and transmitting the converted image signal to the client terminal under the control of the host controller; A host communication interface for performing bidirectional data communication with the client terminal; A host input signal conversion unit converting a long distance (PS / 2) input signal through an external input device into a long distance communication signal and outputting the long distance communication signal to the host communication interface according to the control of the host controller; And a host audio and video transmitter for transmitting video signals and audio signals to the plurality of client terminals under the control of the host controller.

In the second embodiment of the present invention, the host terminal comprises: a TV signal processing unit for receiving a TV image; The apparatus may further include a host UBS interface to which video and audio signals are input from an external video and audio apparatus.

In a third embodiment of the present invention, the client terminal comprises: a client image processing controller for receiving and transmitting an RGB signal; A client communication interface for performing long distance bidirectional data communication with the host terminal; A client audio and video transmission unit for transmitting audio and video signals output from an external video and audio device; And a client input signal converting unit converting the remote input signal PS / 2 into long distance communication data and outputting the same to the client communication interface.

As described above, according to the present invention, the host terminal 10 includes a configuration for converting to an RGB method for transmission of an external image (VTR / DVD) signal such as a personal computer. In addition, there is an effect that the purchase price is reduced as the configuration is simplified because the personal computer is unnecessary.

In addition, the present invention has an effect that can implement the writing function between the host terminal 10 and the client terminal 20 even if there is no computer according to the conversion configuration of the external image for the writing function.

In addition, the present invention by constructing a long-distance bidirectional communication line of the PS / 2 remote signal such as a keyboard or a mouse long-distance RS232 or RS485 method, even if a plurality of client terminals are configured, there is no effect of loss of data, there is an effect that can be stable communication .

Hereinafter, a preferred embodiment of a multimedia network transmission system according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic diagram showing a configuration of a multimedia network transmission system according to the present invention, and FIG. 4 is a block diagram illustrating the concept of a multimedia network transmission system according to the present invention.

3 and 4, a plurality of host terminals 10 connected to an external video and audio apparatus and performing host functions, and connected to the host terminal 10 as a network through bidirectional communication lines and data lines, respectively. Client terminals 20, and client computers 30 for editing, outputting, and outputting and outputting signals inputted and outputted through the client terminal 20 by the user of the client terminal 20.

The host terminal 10 is directly connected to an external video and audio device can receive the signal and store the signal in its own memory, and the reception of the airwaves is performed as it includes a configuration that performs a function of a TV receiving card installed in a computer. It is possible. In this case, the received video and audio signals are converted to RGB signals by transmitting the image data output from the external video and audio devices, and transmitted to a plurality of client terminals 20 connected thereto, and the received RGB signals are transmitted to the external video devices. Convert to original data of. Detailed configuration for this will be described later with reference to FIG.

In addition, the host terminal 10 is directly connected to the mouse or keyboard outputs an input signal according to the user's operation, and output to the screen of the client terminal 20 or the client computer 30 for writing according to the user's selection The displayed image is output to the display included in the host terminal 10.

That is, the multimedia network transmission system according to the present invention embeds the RGB signal conversion configuration of the video signal for writing in the host terminal 10 as in the prior art, so that the writing function can be implemented without a host computer as in the prior art.

The client terminal 20 outputs the video and audio signals transmitted from the host terminal 10 to its own display or client computer 30. In this case, when the client terminal 20 receives the remote control signal of the host terminal 10, the host terminal 10 converts an image signal currently output from its own display or connected client computer 30 into an RGB signal. 10) and is driven according to the remote control signal output from the host terminal (10).

The client computer 30 outputs a signal transmitted and received from the host terminal 10 through the client terminal 20 or an input signal according to a user's operation input through a keyboard or a mouse to the client terminal 20. Output

Here, the client terminal 20 outputs a video or audio signal transmitted from the host terminal 10 through its own display, and additional functions according to the user's needs such as learning, for example, learning of a word program. It can be applied according to the needs of However, according to the present invention, as the above-described configuration in which the VTR, DVD, and TV signals output from the outside are converted into the RGB signal is directly configured in the client terminal 20, there is no separate application as described above. It is not necessary to necessarily provide (30). In this case, the client terminal 20 may be connected to a mouse or a keyboard as the host terminal 10 itself.

5 is a block diagram showing a communication method of a multimedia network transmission system according to the present invention.

Referring to FIG. 5, the multimedia network transmission system according to the present invention includes a client computer 30 connected to one host terminal 10, a plurality of client terminals 20, and optionally a plurality of client terminals 20, respectively. It is configured as.

Here, the host terminal 10 and the client terminal 20 are connected as a bidirectional communication line and a data line, wherein the bidirectional communication line is a PS / 2 long distance signal from the host terminal 10 and the client terminal 20, For example, a mouse or keyboard input signal is converted into a long distance communication signal of RS232 or RS485 for long distance communication. Therefore, in the present invention, even if a plurality of client terminals 20 are connected to one host terminal 10 and its transmission distance is increased, data loss is small.

In addition, as described above, the writing function is added to the host terminal 10 and the client terminal 20, respectively, and the bidirectional communication is possible by being connected through the bidirectional data communication line 41. In other words, writing is possible again in the client terminal 20 on the screen written in the host terminal 10.

In addition, the host terminal 10 and the client terminal 20 can transmit and receive the video and audio signals between each other through a data line, it is possible to talk and share data between both sides.

6 is a block diagram illustrating a host terminal of a multimedia network transmission system according to the present invention.

Referring to FIG. 6, the host terminal 10 according to the present invention includes a host controller 11 for outputting a control signal, and a host image processing controller 12 for converting VTR, DVD, and TV signals into RGB signals and inputting and outputting them. ), A host communication interface 13 for performing long-distance data communication, a host USB interface 14 for performing input / output of data with a USB memory device, and a TV for receiving a video signal of an airwave or cable. A signal processor 15, a host input signal converter 16 for converting a long distance (PS / 2) signal into a long-distance communication signal (RS232 or RS485), and a host voice for transmitting the input video and audio signals. And an image transmitter 17.

The host controller 11 controls the control for the writing function or outputs video and audio signals according to a user's selection signal input through the mouse or the keyboard or a selection signal input through its own switch.

The host image processing controller converts and outputs an image signal of a TV, DVD, VTR input from the outside into an RGB signal, or converts and outputs an RGB signal received from the client terminal 20.

Here, the host image processing controller 12 includes a circuit for converting the RGB signal in the computer, which is well known in the art, and thus detailed descriptions and drawings are omitted.

The host communication interface 13 is an RS communication method, for example, an RS232 or RS485 interface, and an interface for transmitting data over a long distance.

The host input signal converting unit 16 converts the PS / 2 signal, which is the user's selection signal output from the mouse or the keyboard, into RS data, which is a long-distance communication method, and outputs the data to the host communication interface 13.

The TV signal processor 14 receives a TV signal of airwaves or cable signals received by the host terminal 10.

The host audio and video transmitter 17 transmits the video and audio signals received from the external video and audio device or the TV signal processor.

7 is a block diagram illustrating a host terminal in a multimedia network transmission system according to the present invention.

Referring to FIG. 7, a long distance data communication is performed with a client controller 21 for outputting a control signal, a client image processing controller 22 for outputting VTR, DVD, and TV signals received from the outside as RGB signals. A client communication interface 23, a client input signal converter 24 for converting a long distance signal into a long distance signal, and a client voice and video transmitter 25 for transmitting a video and audio signal input from the outside. And a client USB interface 26 to which an external memory device is connected to input and output data.

The client control unit 21 outputs each control signal in accordance with the selection signal output by the client computer 30 or its own switch.

The client image processing controller 22 receives an RGB image signal received externally or from the host terminal 10 and converts the image signal into a VTR, DVD, TV image signal to display the client terminal 20 or the client. Output to the computer 30. Alternatively, the client image processing controller 22 converts the DVD, VTR, and TV video signals input from the outside into RGB signals and outputs them to the host terminal 10.

Here, the client image processing controller 22 includes a circuit for converting the RGB signal in the computer, which is well known in the art, and thus detailed descriptions and drawings are omitted.

The client input signal conversion unit 24 converts a long distance signal received from the client computer 30 or a long distance signal input from a mouse or keyboard connected to itself into a long distance RS signal.

The client audio and video transmission unit 25 transmits the audio signal or the video signal input from the client terminal 20 to another selected client terminal 20 or the host terminal 10.

The client USB interface 26 receives or outputs data from an external memory device.

Hereinafter will be described the operation of the multimedia network transmission system according to the present invention including the above configuration.

The user of the host terminal 10 receives a DVD or VTR image inputted from the TV signal processing unit 15, the USB interface 14, or the external input device through the airwave or cable video, or one of the plurality of client terminals 20. The more client terminal 20 is selected to switch on. Therefore, the host controller 11 drives the host image processing controller 12, and the host image processing controller 12 receives the VTR, DVD, and TV image signals input according to a user's selection signal. ) And an RGB signal suitable for data communication between the client terminal 20 and the client terminal 20. The host image processing controller 12 transmits the converted RGB signal to the client terminal 20 having the IP under the control of the host controller 11.

In addition, when the user's writing function selection input signal is applied through the mouse or the keyboard, the host controller 11 controls the host input signal converting unit 16 to output the remote method from the mouse and the keyboard (PS / 2). The signal of is converted into the signal of long distance method (RS232 or RS485).

In addition, the host input signal converter 16 applies the converted signal to the host communication interface 13, and the host communication interface 13 is selected by the control of the host controller 11. Send to

Therefore, when the client terminal 20 receives an RGB image signal through the client image processing control unit 22, the client terminal 20 converts the image signal into a DVD, VTR, and TV image signal and outputs the same to the client computer 30 or its own display. do. Therefore, the same image may be output to the host terminal 10 and the client terminal 20.

In addition, when a user selection signal of the host terminal 10 by the mouse or keyboard output from the host terminal 10 is received at the client interface, the selection signal is a remote signal by the client input signal conversion unit 24. The data is converted and combined with the video transmitted from the host terminal 10 by the data included in the selection signal.

That is, when a user of the host terminal 10 manipulates his or her image output through the host terminal 10 through a mouse or a keyboard, the manipulated image is the client terminal 20 or the client computer 30. Is output as is on the display.

In addition, the user of the host terminal 10 may transmit a voice or a video to the user of the client terminal 20 through a self-connected microphone or its own image input device. In this case, the host voice and video transmitter 17 transmits the voice or video input through the microphone or the camera to the selected client terminal 20.

In addition, the client terminal 20 controls to receive and output the voice and video transmitted from the user of the host terminal 10 through the client voice and image transmission unit 25.

Therefore, the writing function for the client terminal 20 by the host terminal 10 can be implemented.

In addition, when a user of the client terminal 20 performs an operation or input by a doctor on a writing screen currently output by using the mouse or keyboard and transmitted by the host terminal 10, the client image processing controller Reference numeral 22 converts the video signal into an RGB signal and transmits the video signal to the host terminal 10. In this case, the writing from the client terminal 20 preferably goes through a procedure allowed by the host terminal 10, which is a general content, and thus description thereof is omitted.

In addition, when the input signal through the mouse and the keyboard is applied, the client input signal conversion unit 24 converts it into a long distance signal and applies it to the client communication interface 23. Therefore, the client communication interface 23 transmits it to the host terminal 10.

Therefore, in the display of the host terminal 10, data by the input signal input from the client terminal 20 is also output to the host terminal 10 in the same manner.

That is, according to the present invention, bidirectional communication may be possible through bidirectional communication through a communication interface, and loss due to an increase in resistance generated during data transmission may be prevented.

Preferably, the DVD, VTR, and TV signals output from the client terminal 20 or the client computer 30 through the client terminal 20 are transmitted to the client image processing control unit 22 of the client terminal 20. It is also output to the host terminal 10, the user input signal for the writing in the client terminal 20 may be output to the host terminal 10 through the above-described process.

This is possible according to the present invention by using a long-distance communication interface capable of bi-directional communication, for example, S232 and RS485, wherein the client terminal 20 is connected to the DVD via the client USB interface 26 and the client computer 30. A VTR and a TV signal may be received and output to the host terminal 10.

1 is an explanatory diagram showing a conventional multimedia network transmission system;

FIG. 2 is a block diagram schematically illustrating a configuration for writing between a main terminal 100 and a host terminal 200 in a conventional multimedia network transmission system.

3 is an explanatory diagram showing a multimedia network transmission system according to the present invention;

4 is an explanatory diagram showing a concept of a multimedia network transmission system according to the present invention;

5 is a block diagram showing a communication connection line of the multimedia network transmission system according to the present invention;

6 is a block diagram showing a host terminal in a multimedia network transmission system according to the present invention;

7 is a block diagram illustrating a client terminal in a multimedia network transmission system according to the present invention.

* Description of the symbols showing the main parts of the drawings *

10: host terminal 11: host control unit

12: host image processing controller 13: host communication interface

14: host UBS interface 15: TV signal processing unit

16: host input signal conversion unit 17: host audio and video transmission unit

20: client terminal 21: client control unit

22: client image processing control unit 23: client communication interface

24: client input signal conversion unit 25: client audio and video transmission unit

26: client UI interface 30: client computer

40: connection line 41: communication line

42: data line

Claims (3)

In the multimedia network transmission system comprising a host terminal for selectively transmitting and receiving video and audio signals input from the outside to a plurality of client terminals, and to implement the remote control and writing function of the screen of each client terminal, the host The terminal A host controller for remotely controlling a writing on a screen that is selectively displayed on the plurality of client terminals or a screen of at least one of the plurality of client terminals according to a user's selection signal, and controlling transmission and reception of video and audio signals Wow; A host image processing controller for converting an external video (VTR / DVD) signal into an RGB video signal and transmitting the converted video signal to the client terminal according to the control of the host controller; A host communication interface for performing bidirectional data communication with the client terminal; A host input signal conversion unit converting a long distance (PS / 2) input signal through an external input device into a long distance communication signal and outputting the long distance communication signal to the host communication interface according to the control of the host controller; Since a host audio and video transmission unit for transmitting a video signal and audio signal to the plurality of client terminals under the control of the host controller, The host terminal is capable of bidirectional writing in which the data input from any one of the client terminals is selectively output from the plurality of client terminals, and the data input from the host terminal is output to the display of the client terminal. Multimedia network transmission system characterized in that. The method of claim 1, wherein the host terminal, A TV signal processor for receiving a TV image; The multimedia network transmission system, characterized in that it further comprises a host USB interface for receiving video and audio signals from an external video and audio device. The method of claim 1, wherein the client terminal A client image processing controller which receives and transmits an RGB signal; A client communication interface for performing long distance bidirectional data communication with the host terminal; A client audio and video transmission unit for transmitting audio and video signals output from an external video and audio device; And a client input signal converter for converting a long distance input signal (PS / 2) into long distance communication data and outputting the same to the client communication interface.

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