KR20030083883A - The Picture Transmission System of Lobby Phone - Google Patents

Abstract

PURPOSE: An image transmission system of a lobby phone is provided to solve an impedance matching problem so as to transmit a video signal captured by a camera in the most suitable state to a monitor. CONSTITUTION: An image transmission system of a lobby phone includes a camera(10), a plurality of monitors(20), and a connection board unit(100). The camera is located at a specific region to capture a video signal of the region. The monitors are placed distantly from the specific region and output video signals. The connection board unit is located at a branch node of a connection line of the camera and the plurality of monitors. The connection board unit directly connects one of the plurality of monitors with the camera through a serial line and opens all of lines to the other monitors according to a switching control signal.

Description

The picture transmission system of lobby phone {The Picture Transmission System of Lobby Phone}

According to the present invention, each monitor of a video transmission system of a common door phone including a plurality of monitors and a camera can make a 1: 1 connection in series to a camera, thereby eliminating impedance matching problems and noise caused by reflected waves. It relates to a video transmission system of a common porch machine.

In general, a home automation system refers to a system that provides maximum convenience to residents and administrators by performing various functions such as door opening, closing, security, control of home appliances, and various monitoring remotely through an integrated terminal.

In particular, home automation systems applied to dense residential areas such as apartments allow residents to communicate not only with the doors of the home but also with remote users such as the building lobby, remotely opening and closing the doors of the building lobby, Equipped with a common door to be able to check the status of the monitor through the image of the monitor in the home.

In general, such a common porch should include an image transmission system composed of a camera and a monitor in order to perform the image checking function as described above, Figure 1 shows the configuration of the image transmission system of the conventional common porch It is a block diagram.

As shown in the drawing, a conventional image transmission system of a common entrance machine is installed in a building lobby entrance and the like to acquire an image, and a monitor 20 installed in a home to output an image transmitted from the camera 10. It consists of.

As such, when the camera 10 and the monitor 20 are connected to 1: 1, the best image signal is transmitted when the output impedance of the camera 10 and the input impedance of the monitor 20 are matched to each other, so that the occupant can monitor the 20) You can see a clear screen on the screen.

However, in reality, one camera 10 is installed in a building lobby entrance and the like, whereas the monitor 20 must be installed in each home, and thus a plurality of monitors 20 should be connected to one camera 10.

Therefore, in this case, a plurality of monitors 20 must be connected in parallel to one camera 10, and thus, impedance matching between the two monitors 20 is not performed. Therefore, the video signal reception of the monitor 20 is impossible. Will occur.

Accordingly, as shown in FIG. 2, an image distribution device 30 having a plurality of output ports is separately installed in the distributed nodes of the camera 10 and the monitor 20. In this case, the output of the camera 10 is provided. Is connected to the image distribution device 30 and each output port of the image distribution device 30 is connected to the respective monitors 20 by 1: 1 to solve the impedance matching problem, but in this case, separate image distribution The device 30 is not only expensive, but also requires separate wiring from the image distribution device 30 to each generation, so additional wiring costs are required and there are too many lines focused on the image distribution device 30. Problems arise that make it difficult to install.

In order to overcome the above problems, the image distribution device 30 is distributedly installed in the middle floor of the building, or as shown in FIG. 3, the image lines connected to the respective monitors 20 are connected in parallel and relay contact points. The monitor 20 that is not used by using is opened so that only one monitor 20 is connected and operated at a time, thereby achieving impedance matching.

However, even in such a case, there is a problem in that an image signal output through the monitor 20 is distorted or a ghost phenomenon occurs due to the reflection waves generated in parallel lines.

The present invention was devised to solve these problems, and solves the problem of impedance matching by allowing each monitor to make a 1: 1 connection in series to a camera of a video transmission system of a common door machine including a plurality of monitors and cameras. Therefore, the purpose of the present invention is to output high quality images by transmitting the image signals acquired through the camera to each monitor in the best state.

1 is a block diagram showing the configuration of an image transmission system of a conventional common doorway in which a camera and a monitor are connected 1: 1.

2 is a block diagram showing the configuration of an image transmission system of a conventional common doorway apparatus using an image distribution device.

3 is a block diagram showing the configuration of an image transmission system of a conventional common door machine using a parallel connection and a relay contact;

4 is a block diagram showing the configuration of a video transmission system of a common door according to a preferred embodiment of the present invention,

FIG. 5 is a circuit diagram illustrating a configuration of a connection board illustrated in FIG. 4.

6 is a circuit diagram illustrating a configuration of an image transmission system of a common entrance machine applied to an apartment according to another exemplary embodiment of the present invention.

<Description of the symbols according to the main parts of the drawings>

10: camera

20: monitor

100: wiring board

101: transfer control

200: connection board

In order to achieve the above object, the present invention provides a camera that is installed in a specific area and acquires the video signal, a plurality of monitors that are respectively installed in the specific area and remote places and output video signals, a camera and a plurality of monitors. It is installed in the branch node of the connection line between the connection board and one of the plurality of monitors in accordance with the transfer control signal is connected to the serial line, and the wiring board portion is operated to open all the lines to the other monitor.

In this case, the connection board unit, a plurality of connection boards connected to each other to correspond to each monitor to perform the switching, switching to control the plurality of connection boards to select any one of the plurality of monitors and transfer to the monitor It is composed of a switching control unit for outputting a control signal, each wiring board is a monitor or another wiring board connected to the video signal transferred from the camera or another wiring board according to the transfer control signal output from the switching control unit Alternate to be transmitted.

In addition, the above-described wiring board includes an input port for receiving an image signal transmitted from a camera or another wiring board, a first output port for outputting an image signal received through the input port to a monitor connected thereto, and an input port. A switch for selectively switching the input port to the first output port and the second output port according to the second output port for outputting the image signal received through the input port of another wiring board and the transfer control signal output from the transfer control unit. Is done.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

In addition, it should be noted that the same reference numerals are given to the same components, although belonging to different drawings for convenience of understanding.

4 is a block diagram showing the configuration of a video transmission system of a common door according to a preferred embodiment of the present invention.

As shown, the image transmission system of the common entrance machine according to the preferred embodiment of the present invention is installed in a specific part, such as the lobby of the building, the entrance and the like entrance and the camera 10 for acquiring the video signal, and installed in each home And a plurality of monitors 20 for outputting video signals obtained from the camera 10 and branch nodes of a connection line between the camera 10 and the plurality of monitors 20 and according to a predetermined transfer control signal. The camera 10 is connected to one monitor of the plurality of monitors 20 by a serial line, and the wiring to the remaining monitors is configured as a wiring board unit 100 that operates to block all.

Preferably, the connection board unit 100 is composed of a plurality of connection boards 200 to be connected to each one corresponding to the monitor 20 to perform the transfer and the transfer control unit 101 for controlling the transfer, Each wiring board 200 is connected to the monitor 20 or another wiring board connected to the video signal transferred from the camera 10 or another wiring board according to the transfer control signal output from the transfer control unit 101. To be transmitted to.

5 is a circuit diagram showing the configuration of such a wiring board 200, each of the wiring board 200 is an input port 210 and an input port for receiving an image signal transmitted from the camera 10 or another wiring board ( First output port 220 for outputting the video signal received through the 210 to the monitor 20 connected to it, and outputs the video signal received through the input port 210 to the input port of another wiring board A switch for selectively switching the input port 210 to the first output port 220 and the second output port 230 in accordance with the transfer control signal output from the second output port 230 and the transfer control unit 101 for It consists of 240.

6 is a circuit diagram illustrating a configuration of an image transmission system of a common entrance machine applied to an apartment according to another exemplary embodiment of the present invention.

As shown, the camera 10 is installed at the common entrance of the apartment lobby to acquire the video signal of the lobby, the monitors 20a, 20b, 20c, .. .) Is installed.

Correspondingly, each wiring board 200a, 200b, 200c, ... is provided on each floor to connect or disconnect the monitors 20a, 20b, 20c, ... installed on each floor from the camera 10. The line is connected to a specific monitor 20a, 20b, 20c, ... that requests an image signal transmitted from the camera 10 according to the transfer control signal of the transfer control unit 101.

In FIG. 6, an image signal is transmitted to the monitor 20b installed on the second floor. However, the switching control unit 101 uses the first floor connection board (switch 240a of the first floor wiring board 200a). Transfer control to the second output port 230a of the 200a, and switch 240b of the wiring board 200b of the second layer to the first output port 220b of the wiring board 200b of the second layer. Output the signal.

Therefore, the image signal acquired from the camera and transmitted is input to the input port 210a of the 1st floor connection board 200a and output to the second output port 230a of the 1st floor connection board 200a, which in turn is the 2nd floor. It is input to the input port 210b of the wiring board 200b, and is output to the first output port 220b of the two-layer wiring board 200b and transmitted to the second-layer monitor 20b.

As described above, according to the switching operation, a line is formed in a complete series connection from the camera 10 to the monitor 20b for outputting an image signal, and the wiring board 200c of another layer and the monitor 20a of another layer are formed. It can be seen that the lines 220a and 230b connected to 20c are completely blocked.

Therefore, it is possible to eliminate the problem of impedance matching and the influence on the reflected wave due to the parallel line connection to the monitor 20 which is inevitably generated in the prior art.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that the present invention may be modified without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

As described above, according to the present invention, the camera selected in the specific area such as a building lobby and the like, the monitor selected by the transfer control unit is transferred through the transfer control signal so as to form a serial line, and the rest is switched off. It can be seen that each monitor has a 1: 1 connection in series with the camera.

Therefore, the conventional problem of impedance matching due to parallel connection can be solved, and transmission defects caused by reflected waves can be eliminated. Therefore, the image signal acquired through the camera is transmitted to each monitor in the best state. There is an advantage that can output the video.

Claims (4)

A camera installed in a specific area and acquiring the video signal; A plurality of monitors, each of which is installed in each of the specific region and the remote region and outputs a video signal; Installed at the branch node of the connection line between the camera and the plurality of monitors, the monitor and the camera of one of the plurality of monitors are connected to the serial line in accordance with the transfer control signal and the operation to open all the lines to the remaining monitors The video transmission system of the common entrance door characterized in that it comprises a wiring board. The method of claim 1, wherein the wiring board unit, A plurality of connection boards connected to each other so as to correspond to each of the monitors to perform switching; And a switching control unit for selecting any one of the plurality of monitors and outputting a switching control signal for controlling the plurality of connection boards so as to transfer to the monitors. Each of the connection boards is configured to transfer an image signal transferred from the camera or another connection board to a monitor or another connection board connected thereto according to the transfer control signal output from the transfer control unit. Image transmission system of common entrance machine. The method of claim 2, wherein the connection board, An input port for receiving an image signal transmitted from the camera or another wiring board; A first output port for outputting an image signal received through the input port to a monitor connected thereto; A second output port for outputting an image signal received through the input port to an input port of another wiring board; And a switch for selectively switching the input port to the first output port and the second output port in accordance with the transfer control signal output from the transfer control unit. The system of claim 1, wherein the specific area is any one of a lobby and an entrance of a building.