KR100400669B1 - Surveillance system by using multiple cameras and method of carrying out the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unmanned surveillance system using multiple cameras and a method of operating the same. In particular, several cameras, a video decoder, a video loss monitor, a microcomputer, an image processor, an SDRAM, a video encoder, a monitor for local monitoring, a JPEG compression codec It consists of motion detection logic part, alarm processing logic part, micro processor, network processor, interface part, port and central system. By combining with video signal, it is synthesized into one concentrated video, and it is compressed using JPEG technology into JPEG standard data format and transmitted over the network. Surveillance of network traffic soloism that accompanies surveillance It is to kill.

Description

Surveillance system by using multiple cameras and method of carrying out the same}

The present invention relates to an unmanned surveillance system using multiple cameras and a method of operating the same. In more detail, a multi-synthesis and OSD (On Screen Display) function can be implemented by converting an analog video signal input from multiple cameras into digital. In addition, by converging analog information signal into one frame and compressing by digital image processing method, it transmits to remote central server through network and can drive alarm when intruder occurs or automatically notify security company or police station. As the number increases, the inventors have invented to reduce the network traffic solo phenomenon that accompanies the need and simultaneous monitoring of multiple camera servers.

A conventional unmanned surveillance system, as shown in FIG. 1, includes one camera 1 capable of capturing an image signal for a specific area; A video decoder (2) for digitally decoding the analog video signal output from the camera (1); A JPEG compression codec 9 for compressing an image signal outputted through the video decoder 2; A motion detection logic unit 10 for allowing an administrator to set an arbitrary surveillance area; An alarm processing logic unit 11 for allowing an administrator to select how to generate an alarm sound when an intruder is generated; A microprocessor 12 which performs overall control of the system through a predetermined program; Information including various video signals output from the microprocessor 12 is transmitted to the central system 16 at the remote location through the interface unit 14 and the port 15, and simultaneously transmitted from the central system 16 at the remote location. A network processor 13 for receiving various types of information to be transmitted to the microprocessor 12; It is composed of an interface unit 14 for smooth data communication between the network processor 13 and the central system 16.

However, since the conventional unmanned surveillance system having such a configuration does not support the function of concentrating the multi-channel screen on one screen at a lower level of the system, since the image is first transmitted from each camera, the multi-screen is configured by the software. One set of video processing units per set, i.e., video decoder 2, JPEG compression codec 9, motion detection logic unit 10, alarm processing logic unit 11, microprocessor 12, network processor 13 In addition, since the interface unit 14 and the port 15 are required, the production cost and installation cost of the system are high, and there is a problem that the network function is unnecessarily occupied by the monitoring function.

The present invention has been made to solve such a conventional problem, unlike the conventional system that receives the image signal from one camera and then directly transmitted to the central system through the network first converts the image signal to digital and screen Down scale and then mix with video signals input from other cameras, synthesize them into one concentrated image, compress it into JPEG standard data format using digital processing technology, and transmit it over the network. It is an object of the present invention to provide an unmanned surveillance system using multiple cameras and a method of operating the same, which can reduce the network traffic solo phenomenon associated with the need and simultaneous monitoring of multiple camera servers as the number increases.

The above object of the present invention is to provide a plurality of cameras for imaging different areas, respectively; A video decoder for digitally decoding analog image signals captured and output from the cameras; A video loss monitoring unit which detects whether any one of the cameras stops, stores a previous video image captured by the camera, and transmits a previous video signal along with information about the camera to a microprocessor; A microcomputer that stores programs necessary for processing various images, including an OSD screen division method set by an administrator; An image processor which processes various image data input through a video decoder under the control of the microcomputer and stores the image data in an SDRAM and outputs the same to a video encoder and a JPEG compression codec; A video encoder for converting a digital video signal divided and outputted in a predetermined manner by the image processor into an analog signal and outputting the digital video signal on a local monitoring monitor in a predetermined division method; A local monitoring monitor configured to display a video signal output from the video encoder on a screen for viewing by a monitor; A JPEG compression codec which compresses and transmits a digital image signal which is divided and outputted in a predetermined manner by the image processor to a microprocessor; A motion detection logic unit installed to allow an administrator to set an arbitrary surveillance area; An alarm processing logic unit configured to allow an administrator to select how to generate an alarm sound when an intruder occurs; A microprocessor for outputting a previous image and date information of a non-operational camera including a digital video signal compressed through a predetermined program to a network processor; A network processor that transmits various information including the image signal output from the microprocessor to a remote central system through an interface unit and a port, and at the same time receives and transmits various information transmitted from the remote central system to a microprocessor. Wow; It is composed of an interface unit to facilitate data communication between the network processor and the central system, and if there is a screen change in the designated surveillance area, it stores the video and date information at that time and transmits it to the central server, and sends it to the central server. This can be achieved by activating the alarm in the system and automatically sending the alarm message to the security company or police station as needed.

Therefore, the video signal is converted to digital, the screen is scaled down, mixed with the video signal inputted from other cameras, synthesized into a single concentrated image, and compressed into JPEG standard data format using digital processing technology. Since it can be transmitted through the network, it can reduce the network traffic solo phenomena associated with the need and simultaneous monitoring of multiple camera servers as the number of channels increases.

1 is a block diagram of a conventional unmanned monitoring system.

2 is a block diagram of an apparatus of the present invention.

3 is a flowchart for explaining the method of the present invention.

Figure 4 is an exemplary view when reproducing multiple images in the present invention.

Explanation of symbols on main parts of drawing

1: camera 2: video decoder

3: video loss monitoring unit 4: micom

5: image processor 6: SDRAM

7: Video Encoder 8: Local Monitoring Monitor

9: JPEG compression codec 10: Motion detection logic

11: alarm processing logic section 12: microprocessor

13 network processor 14 interface unit

15 port 16: central system

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 shows a block diagram of the apparatus of the present invention, FIG. 3 shows a flowchart for explaining the method of the present invention, and FIG. 4 shows an exemplary view of reproducing multiple images in the present invention.

According to the present invention, there are provided a plurality of cameras (1), each of which is provided to capture different areas;

A video decoder (2) for digitally decoding analog video signals picked up and output from the cameras;

When one of the cameras detects that the operation is stopped and the non-operation state is detected, the microprocessor 12 stores the previous image data photographed by the camera in itself and transmits the previous image signal together with information about the camera. A video loss monitoring unit 3 for transmitting the video loss monitoring unit 3;

A microcomputer 4 which stores programs necessary for processing various images, including an OSD screen division method set by an administrator;

Under the control of the microcomputer 4, various image data input through the video decoder 2 are processed, stored in the SDRAM 6 as needed, and outputted to the video encoder 7 and the JPEG compression codec 9 at the same time. A main image processor 5;

An SDRAM 6 as a local storage device which temporarily stores various video signals captured by the cameras 1 under the control of the image processor 5;

A video encoder 7 which converts a digital video signal divided and outputted in a predetermined manner through the image processor 5 into an analog signal and outputs the analog video signal in a divided manner set by a manager on a local monitoring monitor 8; ;

A local monitoring monitor (8) for displaying a video signal captured by several cameras (1) input through the video encoder (7) on a screen so that a monitor can be divided and viewed in an on-screen mode;

A JPEG compression codec (9) for compressing a digital video signal which is divided and outputted in a predetermined manner by the image processor (5) and delivering it to a microprocessor;

A motion detection logic unit 10 for allowing an administrator to set an arbitrary surveillance area so as to recognize that there is a visitor including an intruder when a screen change occurs in the area;

An alarm processing logic unit 11 installed to allow an administrator to select how to generate an alarm sound when an intruder occurs;

A microprocessor 12 for outputting a previous image and date information of a non-operational camera including a digital video signal compressed through a predetermined program to the network processor 13;

Various information including the image signal output from the microprocessor 12 is transmitted to the central system 16 at the remote location through the interface unit 14 and the port 15, and from the remote central system 16 at the same time. A network processor 13 for receiving various types of transmitted information and transferring the received information to the microprocessor 12;

It is characterized in that the interface unit 14 is configured to facilitate data communication between the network processor 13 and the central system 16.

In addition, in the method of the present invention, when the administrator logs in through a keyboard or a remote controller, the monitor area is designated on the monitoring screen, and then the screen is changed by monitoring the previous screen and the conversion state in the monitoring area specified in the microprocessor 12. Detecting whether is generated;

Detecting whether a screen change occurs within a designated surveillance region as a result of the detection, within a normal operating time operating in a manned monitoring state;

If the result of the detection is within the normal operating time, after storing the user's transaction history, image of the user's transaction, face part, etc. along with the user's reference, and then recording the date and time information in the stored image and the central system 16 Transmitting the video signal to a server of the terminal and storing the usage history in the central server;

If the detection result is not the normal operating time, switch to intruder mode, and save the image of the intruder front, rear, left and right, and then record the date and time information in the stored image and transmit the video signal to the server of the central system 16 Storing the intrusion history in the server and then operating an alarm alarm and detecting whether there is an alarm designation;

If there is no alarm designation as a result of the detection as described above, return to the initial screen change state monitoring state, and if there is an alarm designation, the step of automatically delivering the alarm message to the security company or police station.

Referring to the effect of the present invention made of such a configuration and steps as follows.

First, when an administrator logs in through a keyboard or a remote control, the administrator can designate a surveillance area on the monitoring screen and ask how to handle alarms.

Therefore, the administrator sets an arbitrary surveillance area by using the motion detection logic unit 10 after logging in to recognize that there is a visitor including an intruder when a change of the screen occurs in the region, and then an alarm. The processing logic unit 11 may select how to generate an alarm sound when an intruder is generated. In this case, the alarm processing logic unit 11 may be complementary to the motion detection organization.

On the other hand, NTSC or PAL analog video signals captured and output by several cameras 1 installed so as to capture different areas, respectively, are digitally decoded through the video decoder 2 and then the image processor 5. Will be entered.

In this case, since the standard video signal overlaps vertically, horizontally, luminance and color signals, the video decoder 2 first separates the individual signals into individual signals and converts latitude and color signals of analog components into digital signals. Adopt the method.

In addition, the video loss monitoring unit 3 detects whether any one of the cameras stops operation (i.e., detects whether the camera operation is stopped by an intruder or the like), and detects the non-operation state. It stores the image data in itself and transfers the previous video signal to the microprocessor 12 together with the information about the camera.

In addition, the microcomputer 4 stores a program necessary for processing various images, including an OSD screen division method set by an administrator, and outputs a control signal to the image processor 5.

Accordingly, the image processor 5 processes various image data input through the video decoder 2 under the control of the microcomputer 4 and temporarily stores the image data in the SDRAM 6 as needed or the video encoder 7 and The JPEG compression codec 9 outputs the result.

Therefore, the video encoder 7 converts the digital video signal, which is divided and synthesized in a predetermined manner through the image processor 5, into an analog signal and outputs it to the local monitoring monitor 8 so that the local In the monitoring monitor 8, a video signal captured by several cameras 1 is shaped as shown in FIG. 4 (that is, video signals of several channels are reduced to an appropriate magnification and rearranged in a grid shape on one monitor screen. The display is divided in the on-screen mode so that the administrator can check at any one place in several places or in multiple directions.

On the other hand, in the JPEG compression codec 9, the raw video signal that is divided and output in a predetermined manner through the image processor 5 is processed by a digital signal processing method, and the information data is condensed and converted into a standard JEPG method sequentially. It is delivered to the microprocessor 12.

Therefore, the microprocessor 12 normally receives the output signal of the JPEG compression codec 9, monitors the previous screen and the conversion state in the surveillance region designated by the administrator, and continuously detects whether a screen change occurs. When the screen change occurs within the designated monitoring area, it detects whether it is within the normal operating time operated under the manned monitoring state.

In other words, the microprocessor 12 detects whether or not the administrator is sitting in front of the local monitoring monitor 8 to perform the monitoring work, and within the normal operating time, the transaction history of the user along with the front, rear, left and right images based on the user. Upon approval, after storing an image such as a face part, the date and time information is recorded in the stored image, and the corresponding video signal is transmitted to the server of the central system 16 to store the usage history in the central server.

However, if it is detected that the normal operation time is not in the intruder monitoring mode in the unattended monitoring function to store the image of the front, rear, left and right of the intruder, the date and time information is recorded in the stored image and the network system 16, By transmitting the video signal to the server of the central system 16 connected via the general telephone network, dedicated line network, wireless call network or the Internet network through the interface unit 14 and the port 15, By using this data, an attacker can easily search for and extract them.

In addition, the central system 16 automatically generates an alarm alarm when the date and time information is transmitted together with the image of the intruder as described above, so that the administrator of the central system 16 immediately recognizes the situation and quickly. Take necessary action in time.

When the alarm alarm is activated as described above, the central system 16 detects whether there is an alarm designation for notifying the relevant security company or police station, and returns to the initial screen change state monitoring state if there is no alarm designation. Alarm messages are automatically delivered to the relevant security company or police station so that the arrest can be made in a short time.

As described above, according to the present invention, unlike the conventional system of receiving an image signal from one camera and transmitting it directly to a central system through a network, the present invention first converts an image signal to digital and then scales down the screen. By mixing with the video signal captured from other cameras and mixing them into one concentrated video, it is compressed into JPEG standard data format using digital processing technology and transmitted over the network. It is a very useful invention that can significantly reduce the network traffic soloism that accompanies the camera server's requirements and simultaneous monitoring.

Claims (2)

Several cameras 1 installed so as to photograph different areas, respectively; A video decoder (2) for digitally decoding analog video signals picked up and output from the cameras; When one of the cameras detects that the operation is stopped and the non-operation state is detected, the microprocessor 12 stores the previous image data photographed by the camera in itself and transmits the previous image signal together with information about the camera. A video loss monitoring unit 3 for transmitting the video loss monitoring unit 3; A microcomputer 4 which stores programs necessary for processing various images, including an OSD screen division method set by an administrator; Under the control of the microcomputer 4, various image data input through the video decoder 2 are processed, stored in the SDRAM 6 as needed, and outputted to the video encoder 7 and the JPEG compression codec 9 at the same time. A main image processor 5; An SDRAM 6 as a local storage device which temporarily stores various video signals captured by the cameras 1 under the control of the image processor 5; A video encoder 7 which converts a digital video signal divided and outputted in a predetermined manner through the image processor 5 into an analog signal and outputs the analog video signal in a divided manner set by a manager on a local monitoring monitor 8; ; A local monitoring monitor (8) for displaying a video signal captured by several cameras (1) input through the video encoder (7) on a screen such that the monitor can be divided and viewed in an on-screen mode; A JPEG compression codec (9) for compressing a digital video signal which is divided and outputted in a predetermined manner by the image processor (5) and delivering it to a microprocessor; A motion detection logic unit 10 for allowing an administrator to set an arbitrary surveillance area so as to recognize that there is a visitor including an intruder when a screen change occurs in the area; An alarm processing logic unit 11 installed to allow an administrator to select how to generate an alarm sound when an intruder occurs; A microprocessor 12 for outputting a previous image and date information of a non-operational camera including a digital video signal compressed through a predetermined program to the network processor 13; Various information including the image signal output from the microprocessor 12 is transmitted to the central system 16 at the remote location through the interface unit 14 and the port 15, and from the remote central system 16 at the same time. A network processor 13 for receiving various types of transmitted information and transferring the received information to the microprocessor 12; Unattended monitoring system using multiple cameras, characterized in that the interface unit 14 to facilitate the data communication between the network processor (13) and the central system (16). When the administrator logs in through a keyboard or a remote controller, the controller designates a surveillance region on the monitoring screen, and then detects whether a screen change occurs by monitoring a previous screen and a conversion state within the designated surveillance region in the microprocessor 12. Wow; Detecting whether a screen change occurs within a designated surveillance region as a result of the detection, within a normal operating time operating in a manned monitoring state; If the result of the detection is within the normal operating time, after storing the user's transaction history, image of the user's transaction, face part, etc. along with the user's reference, and then recording the date and time information in the stored image and the central system 16 Transmitting the video signal to a server of the terminal and storing the usage history in the central server; If the detection result is not the normal operating time, switch to intruder mode, and save the image of the intruder front, rear, left and right, and then record the date and time information in the stored image and transmit the video signal to the server of the central system 16 Storing the intrusion history in the server and then operating an alarm alarm and detecting whether there is an alarm designation; If there is no alarm designation as a result of the detection as described above, returning to the initial screen change state monitoring state, and if there is an alarm designation, automatically sending an alarm message to the corresponding security company or police station; unattended monitoring using multiple cameras, characterized in that consisting of How the system works.