KR20020061419A - Displayed character automatic - change equipment and method of CCTV system - Google Patents

Abstract

PURPOSE: A device and a method for automatically converting display characters in a CCTV(Closed Circuit Television) system are provided to display character information on a displayed image, and to automatically convert the character information whenever the displayed image changes to adjust the character information to the changed image. CONSTITUTION: In an image pickup unit(100), a monitoring camera(110) shoots a region and a direction for monitoring, a pan/tilt(120) drives the monitoring camera up/down and right/left, and a camera signal receiver(130) receives a control signal of the monitoring camera to change the camera in a desired direction. An angle sensing unit(200) senses an angel changed by the rotation of the monitoring camera. An image pickup unit side information signal transceiving unit(300) transmits image signals and angle signals respectively shot and sensed in the image pickup unit and the angle sensing unit to a remote site, and exchanges information with a user side information signal transceiving unit(350). The user side information signal transceiving unit receives the image signals and angle signals and exchanges information with the image pickup unit side information signal transceiving unit. An information processing unit(400) analyzes the image signals and angle signals to display character information corresponding to the angle signals on a display unit(620). An input unit(500) inputs and stores information to express the corresponding character information, according to the change of the angle signals of the monitoring camera, on a screen together with the image information. In an image receiving unit(600), a camera control signal transmitter(610) changes a monitoring direction of the monitoring camera, and a display unit(620) enables a user to visually observe image and character information of the monitored region.

Description

Display character automatic-change equipment and method of CCTV system

The present invention relates to an apparatus for displaying text information on an image displayed in a CCTV system and automatically converting text information so that the changing image and text information coincide with each change of the displayed image.

More specifically, the monitoring is inserted into the display device so that the user can easily grasp when the monitoring rotation camera installed at a certain place changes by the automatic or manual operation and the displayed image information changes accordingly. Text information indicating local names, roads, directions, etc. of the area is automatically converted so that the text information matches the changed image and displayed on the display device. It is possible to easily determine the situation, and the text information displayed on the display device can be displayed at any position of the display device according to the user's convenience, and the font or size of the text information can be adjusted to the user's preference. DIS in one CCTV system to make An apparatus and method for automatically converting play characters.

In general, a CCTV (Closed Circuit Television) system transmits image information captured by a camera to a specific number of recipients rather than an unspecified number of recipients, and through the transmitted image information, It is a television system that displays information to acquire information and observes the area to be monitored according to the purpose. The transmission and reception of the image is connected by wire or wireless, and it cannot be received by users other than the recipient. It is also called a closed circuit television and is used for remote observation, observation of invisible areas, observation in an environment where people cannot be approached, simultaneous observation by multiple people, or intensive monitoring of a specific area. Industrial, Vehicle Video Surveillance, Traffic Management It is used in a wide range of applications.

The CCTV system used for the above purposes is a little different depending on the purpose and scale of use, but basically an imaging device for photographing a subject and converting it into an electric signal, and a transmission device for transmitting the electric signal to a remote site, and It is roughly divided into three parts of an image receiving device which reproduces an on-video signal and displays an image. Even in a relatively small system, if any one of the three components is missing, the system cannot be operated.

In addition, when the size of the CCTV system grows, in addition to each device consisting of the three parts, various accessory devices are installed. Therefore, a control device for integrating and controlling each device must be separately configured. The large-scale CCTV system will be constructed by combining additional equipment such as image processing device for interpretation, processing and processing.

The imaging device mainly includes a camera for monitoring, and a camera, lens, filter, etc. to be selected are determined according to a purpose of use, and a bracket, a camera housing, etc. for fixing the camera are required, and a camera body and a lens are placed thereon. In addition, the peripheral equipment necessary to remotely control the positional relationship between the camera and the subject should be attached to the camera.

The transmission device is intended to transmit a video signal to a target point to use the image and is largely divided into a wired transmission and a wireless transmission. In a typical CCTV system, since the transmission device is used for a limited purpose, the transmission device is often wired. The transmission method mainly includes a base band transmission method for transmitting a video signal used in a short distance as it is, a carrier transmission method for modulating a carrier wave, or pulse code modulation (PCM: Pulse) for encoding and modulating a pulse. Code Modulation) There is a transmission method and an optical communication method using optical fiber and laser, and the user adopts the most suitable method according to the purpose of use and economic conditions.

The receiving device is intended to receive and reproduce the transmitted video signal, the control device for controlling the surveillance camera and the received video signal and other accessories according to the size and purpose of the CCTV system, processing and recording of the image, An image processing apparatus for processing information such as reproduction and hard copy is used in combination.

The CCTV system is fixed to monitor one side of the camera to one side and installed in a predetermined place, and the fixed type for intensive monitoring of one side without driving the surveillance camera, and the automatic or manual operation of the camera installed in a predetermined place in various directions It is divided into rotary type for monitoring.

The fixed and rotational CCTV systems will be described with reference to FIG. 1 and FIG. 2 with respect to the coupling relationship between the components constituting the system and the operation process.

FIG. 1 is a schematic configuration diagram of a conventional fixed CCTV system, in which a surveillance camera 1 installed at a predetermined location in a fixed direction and a video signal photographed by the surveillance camera 1 are installed at a remote location. The video signal transmitter 5 for transmitting to the side, the video signal receiver 10 for receiving the video signal transmitted from the video signal transmitter 5, and the video signal received by the video signal receiver 10. It is shown that it consists of a monitor 15 for display.

In the operation of the fixed CCTV system, the video captured by the surveillance camera 1 installed to look at one side in a predetermined place is converted into a suitable signal for transmitting to a remote place, and the converted signal is amplified and then the video signal. The transmitter 5 transmits the video signal to the remote receiver 10.

The video signal receiver 10 converts the signal received from the video signal transmitter 5 into a video signal so that the user can see the naked eye, and outputs it to the monitor 15 so that the situation of the site can be confirmed as an image remotely. Will be.

In the fixed CCTV system, if a user wants to monitor multiple directions in the same area to be monitored, the surveillance cameras must be installed in all directions to monitor, and accordingly, the user's time and economic burden have been accompanied.

In addition, when several fixed surveillance cameras are installed and operated according to the surveillance area or monitoring direction, the image information transmitted from the surveillance cameras monitoring a certain direction will be output to each display device. It is difficult for a user who is not familiar with or who is inexperienced in operating a device to read the situation of each surveillance area only by image information output from multiple display devices.

In order to solve this problem, a rotating CCTV system has been proposed and used.

2 is a schematic configuration diagram of a conventional rotating CCTV system, and includes a monitoring camera 21 installed at a predetermined place and a rotating machine (PAN / TILT) 22 for driving the monitoring camera 21 up, down, left, and right. ) And a camera control signal receiver 23 for receiving a camera operation signal transmitted from a remote location and converting the monitoring direction of the camera, and a camera for monitoring the imaging device 20. A video signal transmitter 25 for transmitting the video signal photographed at 21 to a receiving side installed at a remote location, a video signal receiver 30 for receiving the video signal transmitted from the video signal transmitter 25, It consists of a water control device 40 including a camera control signal transmitter 41 which is a control means for changing the monitoring direction of the surveillance camera 21 installed at a remote site and a monitor 45 for displaying the received video signal. Done It is shown.

The operation of the rotating CCTV system, when the user wants to change the monitoring direction of the monitoring camera 21 installed in a predetermined place, and transmits a control signal through the control signal transmitter 41, to a remote monitoring place The installed control signal receiver 23 detects this signal and drives the rotating machine 22 to move the monitoring direction of the monitoring camera 21 in the direction desired by the user.

Subsequently, the surveillance camera 21 photographs the situation of the site, and the image signal photographed by the surveillance camera 21 is converted into an electrical signal through a predetermined signal processing process in the image signal transmitter 25, and then the image It is transmitted to the signal receiver 30, the video signal receiver 30 is to restore the electric signal transmitted from the transmitting side to the original video signal to output the image of the surveillance area to the monitor (45).

This type of rotating CCTV system can be monitored by rotating a single camera in multiple directions when monitoring multiple directions in the same area, which can reduce the economic burden on the user compared to the fixed CCTV system. Similarly to fixed CCTV systems, when used by inexperienced users, there is a problem that it is difficult to easily determine the situation of the surveillance area based on the image information that is changed and output according to the rotation of the camera.

Accordingly, recently, in order to solve the problem of the rotating CCTV system, after installing the character generator on the receiving side, in addition to the output image of the surveillance area in order for each user to easily read the situation of the site. By explaining the character information to be displayed on the monitor along with the image information, even if you are not familiar with the monitoring area or inexperienced user, it is relatively easy to see each image information displayed on the display device and additional text information about it. In order to easily read the situation in the field has been introduced and used.

However, even in the case of adopting a method of displaying text information for additional explanation on the screen as described above, when the user drives the surveillance camera to change the surveillance direction or region, the image information of the surveillance region changes accordingly. However, since the text information is not converted, there is a problem that image information and text information about the surveillance region displayed on the screen do not match.

This will be described with reference to FIGS. 3A and 3B.

Figure 3a is an embodiment of the display information output before changing the monitoring camera in the conventional rotational CCTV system, Figure 3b is an embodiment of the display information output after changing the monitoring camera.

3A and 3B illustrate an embodiment of observing an intersection using a CCTV system for the purpose of traffic control, but such a situation appears to vary depending on the purpose and place of installation of the CCTV system.

In FIG. 3A, when the camera is pointing north, character information, such as directions and names of each road, is inserted into the image information, and the image and characters displayed on the screen match with each other.

However, when the camera's monitoring direction is rotated to point east, the camera rotates as shown in FIG. 3B, but the image is changed, but the character information displayed on the screen is fixed as it is. Inconsistent.

As described above, when the character information to be inserted for additional explanation of the image information is displayed on the display device in the conventional rotating CCTV system, even if the image changes as the camera rotates, the character information is maintained as it was before the change. As the user judges the situation of the surveillance area through the image information and the text information which do not coincide with each other, there is a problem that the user misjudges the situation of the site.

In addition, even if the monitoring direction of the camera changes, character information indicating a particular display or direction does not move, change or delete on the display screen. There was a problem that the text information for the additional explanation of the video information acts as an obstruction to monitoring.

In order to solve the problems of the conventional apparatus described above, the character information indicating the surveillance area name, direction, etc. are automatically converted to be displayed on the display device so as to be suitable for the image information that changes according to the rotation of the surveillance camera. Its purpose is to.

In addition, the user can arbitrarily determine the size of the character information displayed on the display device, the screen display position, the font type, the symbol character, etc., which are automatically converted according to the image information, so that the main monitoring target is blocked by the character information displayed on the screen. The purpose is to solve the problem.

In order to achieve the above object, the present invention converts a moving angle of the camera according to a change in the monitoring direction of the surveillance camera into an electrical signal, and converts the converted electrical signal back into a digital signal, and then overlaps with the captured image signal. In this case, the receiving side separates the superimposed transmitted angle signal and the video signal, and after determining the separated angle signal at the receiving side, the character information corresponding to the previously stored angle signal is displayed on the display device. .

1 is a schematic configuration diagram of a conventional fixed CCTV system

2 is a schematic configuration diagram of a conventional rotary CCTV system

Figure 3a is an embodiment of the display information output before the monitoring camera variable in the conventional rotating CCTV system

Figure 3b is an embodiment of the display information output after the monitoring camera variable in the conventional rotating CCTV system

4 is a block diagram of the present invention

Figure 5 is a block diagram showing the configuration of the angle detection unit in the present invention

6 is a block diagram showing a configuration of an information processing apparatus unit in the present invention;

7 is a flowchart for inputting user confirmation and text information when monitoring a surveillance area;

8 is an explanatory diagram for a process of inputting character information in the present invention;

Figure 9a is an embodiment of the display information output before the monitoring camera variable in the present invention

Figure 9b is an embodiment of the display information output after the monitoring camera variable in the present invention

*** Explanation of symbols in main part of drawing ***

100: imaging device unit 110: surveillance camera

120: PAN / TILT 130: Camera control signal receiver

200: angle detection unit 210, 430: central processing unit

220: voltage signal detection device 230: A / D signal conversion device

240: angle and image signal mixing device 300: image pickup unit side information signal transceiver

350: user side information signal transceiver 400: information processing apparatus

410: video signal receiver 420: angle signal separation device

440: storage device 450: character generator

460: video and text signal mixing device 470: communication port

500: input unit 600: water receiver

610: camera control signal transmitter 620: display device

700: configuration step 710: user number assignment step

720: user font designation step 730: user text size specification step

800: character information input step 810: character input step

820: angle input step 830: character position input step

840: character modification step 850: character deletion step

860: character storage step 900: information transmission step

910: text transmission step 920: storage information modification step

930: Delete the stored information step 940: Save the information

The configuration and operation of the present invention for achieving the above object will be described in detail with reference to FIGS. 4, 5 and 6.

4 is a configuration diagram of the present invention, the automatic display character conversion apparatus of the present invention CCTV system is a surveillance camera 110 and a surveillance camera installed in a predetermined place to shoot the area and the direction to be monitored by the user Camera for changing the direction of the camera in a desired direction by receiving a control signal of the rotating camera (PAN / TILT) 120 and the monitoring camera 110 transmitted from a remote user The imaging device unit 100 including the control signal receiver 130, the angle detecting unit 200 for detecting the angle changes according to the rotation of the monitoring camera 110, the imaging device unit 100 and An image signal transmitting and receiving unit 300 for transmitting an image signal and an angle signal photographed and sensed by the angle detecting unit 200 to a remote location and exchanging information with the user information transmitting and receiving unit 350; A user side information signal transceiver 350 for receiving an image signal and an angular signal transmitted from the signal transceiver 300 and exchanging information with the information signal transceiver 300 at the imaging device side, and a user side information signal transceiver 350 After analyzing the video signal and the angle signal transmitted from the information processing apparatus 400 for displaying the character information corresponding to the angle signal on the display device 620, and the monitoring transmitted from the imaging device unit 100 The input device unit 500 for inputting and storing information for displaying the corresponding character information along with the image information on the screen according to the change of the angle signal of the camera 110, and monitoring the surveillance cameras installed at remote locations. Camera control signal transmitter 610, which is a remote control means for changing the direction, and a display device for allowing the user to visually observe the image and text information of the surveillance area (6). 20 is composed of a water-receiving device unit 600, including.

5 is a block diagram showing the detailed configuration of the angle detection unit 200 of the present invention,

The angle detecting unit 200 is a voltage signal detecting device 220 for detecting a voltage value that changes according to the rotation of the central processing unit 210 and the monitoring camera 110 for the internal control and control of each device. And an A / D signal converter 230 for converting an angular signal, which is an electrical signal sensed by the voltage signal detector 220, into a digital signal, and a digital signal from the A / D signal converter 230. The angle and image signal mixing device 240 for superimposing and transmitting the converted angle signal and the image captured by the surveillance camera is configured.

Referring to the operating principle of the angle detecting unit 200,

When the monitoring angle of the monitoring camera 110 changes, an angle measuring voltage is applied in order to change the magnitude of the voltage in proportion to the changed angle, and when the user changes the monitoring direction of the camera, the changed monitoring direction The voltage signal detection device 220 recognizes a voltage signal corresponding to an angle of.

Since the voltage signal is a continuously changing analog signal, it is passed through the A / D signal conversion device 230 to convert it into a digital signal which is a discontinuous signal in order to transmit the mixed signal with the video signal.

In the A / D signal conversion apparatus 230, in order to make an analog input signal into a discrete signal, a sampling process is performed to collect a frequency at a speed of two or more times the highest frequency (fm) of the signal, and the amplitude of the sampled signal. Is converted into a digital signal through a quantization process, which is a process of approximating a to the discrete quantization level 2n closest to the signal, and an encoding process of converting amplitude magnitudes of the quantized signal pulses into binary codes.

In addition, in order to recognize the angle signal converted into a digital signal at the receiving side, an identification bit is inserted at the front and rear ends of the angle signal, so that the receiving side recognizes the angle signal through the identification bit.

The video signal mixer 240 adds the angular signal converted to the digital signal as described above in addition to the pause time of the video signal, that is, the free period of the signal, so as not to affect the photographed video signal, and then mixes the signal to the receiver Will be.

6 is a block diagram showing a detailed configuration of an information processing apparatus unit in the present invention.

The information processing unit 400 separates an image signal receiving apparatus 410 for receiving a transmitted image signal and an angle signal, and an angle signal that is overlapped with the image signal transmitted by the image signal receiving apparatus 410. In accordance with the angle signal separation device 420, the central processing unit 430 for reading and processing the angle signal separated from the control and internal calculation and angle signal separation device 420 of each device, and according to the corresponding angle signal The storage device 440 for storing the character information displayed with the image on the display device 620, and processing and conversion of the signal so that the character information stored in the storage device 440 can be mixed with the image signal. The character generator 450 and the image signal from which the angle signal is separated by the image signal receiver 410 and the character information generated by the character generator 450, and then transmits the image information to the display apparatus 620 to transmit the image. And character Image and text signal mixing device 460 to be output, and a communication port 470 for communicating with the input device unit 500 so that the user can store the text information in advance.

When the operation principle of the information processing unit 400 is described in detail, the image signal and the angle signal superimposed by the angle detecting unit 200 are received by the image signal receiving apparatus 410, and the received image signal and the angle signal are Since it overlaps, the angle signal separation device 420 is passed to separate the signal.

The angle signal separation device 420 recognizes the angle signal through the identification bit included in the angle signal, and then separates the image signal from the angle signal.

The CPU 430 determines the separated angle signal as described above, and loads the character information corresponding to the angle signal previously input by the user to the memory device 440.

Character information corresponding to the angular signal output from the memory device 440 is subjected to a correction process such as brightness, sharpness adjustment of the character information in the character generator 450, the monitoring region in the image and text signal mixing device 460 The image information and the character information for the description of the image are mixed and displayed on the display device 620 so as not to be invaded and distorted.

Next, a text information input method for automatically converting text information designated and stored for each user to be changed according to the monitoring angle change will be described with reference to FIGS. 7 and 8.

7 is a flowchart for inputting user confirmation and text information when monitoring a surveillance area, and FIG. 8 is an explanatory diagram for a process of inputting text information in the present invention.

7 and 8 illustrate that the changed image and the character information are displayed when the image information displayed using the character information stored in the storage device 440 is changed through the communication port 470 of the information processing apparatus 400. It shows how to automatically convert to match, and how to observe the surveillance area through the pre-stored text information for each user in accordance with his taste and purpose when observing the surveillance area,

To save each user's text information, which can vary according to user's taste or main monitoring target, and to give each user number for the saved text information, it is necessary to distinguish each user in order to provide a suitable operating environment for each user. The environment setting step 700 includes a text information input step 800 for a user to input characters and symbols for an image, and an information transmission step 900 for storing the input information.

The environment setting step 700 stores the text information on the image according to the user's taste or the main monitoring target setting differently for each user and allows the user to observe the monitoring area according to the contents of the text information set by each user. A user number designation step 710 for identification, a user font designation step 720 for designating the font of the text information displayed on the screen for each user, and the size of the text information displayed on the screen for each user It consists of a user character size designation step (730).

The text information input step 800 is a text input step 810 for a user to input text information such as a place name or direction of a monitoring target, and a text input step 800 for inputting a range of an angular signal in which the input text information is displayed on a screen. An angle input step 820, a character position input step 830 for specifying and inputting a position where the input character information is displayed on the screen, a character modification step 840 for correction of the input character information, Character deletion step 850 for deleting the input character information, and a character storage step 860 for the storage of the input character information.

The information transmission step 900 is a character transmission step 910 for transmitting the character information completed in the character information input step 800 to the storage device 440 through the communication port 470, and the stored character information Storage information modification step 920 for correcting the information, storage information deletion step 930 for deleting stored text information, and information storage step for storing the text information modified in storage information modification step 920 It consists of 940.

The text information of each user stored in the above manner is recognized by the device through input of a unique number of each user at the time of monitoring the surveillance region, and the text information defined for each user is included in the image information that changes according to the positional change of the camera. It is automatically converted and displayed to fit.

The overall operation of the present invention described above will be described using a traffic control system as an example.

FIG. 9A illustrates an embodiment of outputting display information before changing a surveillance camera, and FIG. 9B illustrates an example of displaying display information after changing a surveillance camera.

FIG. 9A illustrates that the user is observing an intersection for the purpose of traffic control, and when the surveillance camera 110 points in the direction of Dongho Bridge in the north, the user stores the text information previously stored in accordance with the image information. By the display device 620, the upper direction is indicated by the arrow and the text explaining that the direction of the Dongho Bridge, and the other direction also indicates that the character information for each direction is displayed by the character information previously defined and stored by the user. .

FIG. 9B illustrates an embodiment of a display screen output when the user changes the monitoring direction of the camera as needed. When the user converts the monitoring direction of the monitoring camera 110 to the nonhyeon-dong and samseong-dong directions in the east, The angle detecting unit 200 recognizes this and mixes the variable angle signal and the image signal and transmits them to the receiving side.

The information processing apparatus unit 400 on the receiving side separates the mixed and transmitted video signal and the angle signal, and then combines the character information corresponding to the separated angle signal with the video signal in the converted direction in the display device 620. The corresponding character information is automatically converted and displayed.

As described above, according to the present invention, when the user changes the monitoring direction of the surveillance camera installed in a predetermined region to be monitored and observed by the user, the surveillance region name, Since character information indicating a direction or the like is automatically converted and displayed on the display device, the user can accurately and easily read the situation of the scene by the image information displayed on the screen.

In addition, the main monitoring target is determined by the character information displayed on the screen by allowing the user to arbitrarily determine the size of the character information displayed on the display device, the screen display position, the font type and the symbol character, which are automatically converted according to the variable image information. In addition to solving the problem that is hidden, the user can insert detailed character information for each monitoring target by using symbols and letters for the main monitoring target in the monitoring direction, so that the user can monitor and observe more effectively. It is a revolutionary invention that allows.

Claims (7)

Surveillance camera 110 to be installed in a predetermined place in order to photograph the area and the direction to be monitored by the user, a rotating device (PAN / TILT) 120 for driving the surveillance camera 110 in the up, down, left and right, An imaging device unit 100 including a camera control signal receiver 130 for receiving a control signal of the monitoring camera 110 transmitted from a remote user and changing the direction of the camera in a desired direction, and a monitoring camera. And transmits an image signal and an angle signal photographed and detected by the angle detecting unit 200 and the image capturing unit 100 and the angle detecting unit 200 to detect an angle that changes according to the rotation of the 110. The image signal receiver side information signal transceiver 300 for exchanging information with the user side information signal transceiver 350, the image signal and the angle signal transmitted from the information signal transceiver 300, and receives information After analyzing the video signal and the angle signal transmitted from the user-side information signal transceiver 350 and the user-side information signal transceiver 350 to exchange information with the call transceiver 300, the character information corresponding to the angle signal Character information corresponding to the change in the angle signal of the information processing apparatus 400 for displaying the display on the display device 620 and the monitoring camera 110 transmitted from the image capturing apparatus 100 is displayed on the screen. An input device unit 500 for inputting and storing information for displaying and displaying information, a camera control signal transmitter 610 which is a remote control means for changing a monitoring direction of a monitoring camera installed at a remote location, CCTV system, characterized in that consisting of the water-receiving unit 600 including a display device 620 for the user to observe the image and text information with the naked eye. Display character autochanger. In claim 1, The angle detecting unit 200 includes a central processing unit 210 for control and internal calculation of each device, a voltage signal detecting device 220 for detecting a voltage value changing according to the rotation of the surveillance camera 110, and And an A / D signal converter 230 for converting an angular signal, which is an electrical signal sensed by the voltage signal detector 220, into a digital signal, and converts the A / D signal converter 230 into a digital signal. Display character automatic conversion device of the CCTV system, characterized in that composed of the angle and the image signal mixing device 240 for transmitting the superimposed angle signal and the image taken by the surveillance camera. In claim 1, The information processing apparatus unit 400 is a video signal receiver 410 for receiving a video signal and an angle signal to be transmitted, and the video signal receiver 410 for separating the angle signal transmitted by overlapping the video signal The angle signal separating device 420, the central processing unit 430 for reading and processing the angle signal separated by the control and internal calculation of each device and the angle signal separating device 420, and the display according to the corresponding angle signal The storage device 440 for storing the character information displayed with the image in the device 620, and the processing and conversion of the signal so that the character information stored in the storage device 440 can be mixed with the image signal. The character generator 450 and the image signal from which the angle signal is separated by the image signal receiver 410 and the character information generated by the character generator 450 are then mixed and transmitted to the display apparatus 620 to transmit the image and the image. Character output The video and text signal mixing device 460 and the communication port 470 for communicating with the input device unit 500 so that the user can store the text information in advance of the CCTV system, characterized in that Display character autochanger. To save each user's text information, which can vary according to user's taste or main monitoring target, and to give each user number for the saved text information, it is necessary to distinguish each user in order to provide a suitable operating environment for each user. CCTV system, characterized in that it comprises a configuration step 700, the character information input step 800 for the user to input text and symbols for the image, and the information transmission step 900 for storing the input information How to convert display characters automatically. In claim 4, The environment setting step 700 stores the text information on the image differently for each user according to the user's taste or main monitoring target setting, and identifies the user so that each user can observe the monitoring area according to the contents of the text information set by the user. A user number designation step 710 for designating, a user font designation step 720 for designating a font of text information displayed on the screen for each user, and a size for determining the size of the text information displayed on the screen for each user Display character automatic conversion method of the CCTV system, characterized in that consisting of the user character size designation step (730). In claim 4, The text information input step 800 is a text input step 810 for a user to input text information such as a place name or direction of a monitoring target, and an angle for inputting a range of an angle signal in which the input text information is displayed on the screen. An input step 820, a character location input step 830 for specifying and inputting a position where the inputted character information is displayed on the screen, a character modification step 840 for correcting the inputted character information, and an input. Display character automatic conversion method of the CCTV system, characterized in that consisting of a character deletion step 850 for the deletion of the received character information, and a character storage step 860 for the storage of the input character information. In claim 4, The information transmission step 900 is a character transmission step 910 for transmitting the character information completed in the character information input step 800 to the storage device 440 through the communication port 470, and the stored character information The storage information modification step 920 for correcting, the storage information deletion step 930 for deleting the stored text information, and the information storage step for storing the text information modified in the storage information modification step 920 ( 940) automatic conversion of the display character of the CCTV system, characterized in that consisting of.