KR20060086505A - Digital security system using motion detection and operating method thereof - Google Patents

Abstract

According to the present invention, in a security system using a plurality of surveillance cameras and a DVR, only a video of a corresponding channel in which a motion is detected is determined by determining a channel in which a motion of a person or an object is detected among the multi-channel video signals received from the plurality of surveillance cameras. By activating the monitor screen, the present invention relates to a digital security system using motion detection and a method of operating the monitor monitor capable of efficient monitoring.

The present invention can be displayed on the monitor only as a motion image signal determination unit for detecting an abnormal symptom of a surveillance zone by detecting a movement among images transmitted from the plurality of surveillance cameras and a screen about the image on which the movement is determined. It is composed of an image output control unit that can be controlled so that it can automatically detect the motion detected image and inform the monitor. The monitor can easily recognize the abnormal signs of the monitoring area without paying special attention to the monitoring. It is effective in reducing fatigue and acting as a quick and faithful watcher.

Motion Detection, DVR, Video Signal, Monitor

Description

Digital security system using motion detection and its operation method             

1 is a block diagram of a conventional digital security system.

2 is an internal configuration diagram of a DVR provided in a digital security system using motion detection according to an embodiment of the present invention.

3A is a schematic diagram of a motion detection circuit configured in a motion determining unit according to an embodiment of the present invention.

3b is a conversion characteristic diagram of a conversion circuit of the motion detection circuit according to an embodiment of the present invention;

3C to 3E are schematic diagrams of an addition circuit of the motion detection circuit according to an embodiment of the present invention.

4 is a flowchart of a digital security system using motion detection according to an embodiment of the present invention.

The present invention relates to a digital security system using motion detection and a method of operating the same, and more particularly, to a security system using a plurality of surveillance cameras and a DVR, among a plurality of video signals received from a plurality of surveillance cameras. The present invention relates to a digital security system using motion detection and an operation method of determining a channel where motion of an object is detected and activating only an image of a corresponding channel where motion is detected on a monitor screen.

A widely used security system is an analog CCTV security system using a VCR. In the analog CCTV security system, a plurality of surveillance cameras (usually four, nine, or sixteen) are connected to a multiplexer, and video signals transmitted from the multiplexer display a split screen on a monitor.

The multiplexer captures images from multiple cameras, makes them into split screens (4 splits, 9 splits, and 16 splits) and sends them to the monitor. In this case, the image transmission from the multiplexer to the monitor is not to transmit a split screen, but to sequentially transmit one image transmitted from each camera to the monitor. This video signal is also transmitted to the VCR.

The VCR is transmitted from a camera and receives and records an image made of a split screen by a multiplexer. The recording is performed by storing in a magnetic tape which is a storage medium of an analog system. In addition, the VCR can play back the recorded video. When the play button of the VCR is pressed, the video recorded on the magnetic tape is transmitted to the multiplexer through the playback channel. It transmits to the monitor to play the recorded video.

In addition, recently, a digital security system including a digital video recorder (DVR), which can solve the disadvantages of the analog security system and achieve more advanced functions, has been newly developed and commercially available.

The DVR may store a large amount of images by storing images captured and transmitted from various surveillance cameras on a digital storage medium such as an HDD having better storage than the analog magnetic tape. In addition, the stored images can be easily searched, edited, and reproduced, and good image quality can be continuously maintained even for several times of repeated playback. In addition, the DVR accommodates not only the VCR but also the function of the multiplexer. The system is smaller in size than an analog system and has a simple configuration in a facility. Recently, the DVR has introduced a multi-channel function supporting up to 64 channels with such a simple configuration. .

Therefore, if only a surveillance camera capable of satisfying the number of channels in such a digital system can be secured through the monitoring of the video information transmitted from a plurality of surveillance cameras in a simple facility to secure more surveillance zones. At this time, in the monitoring method, the video information sent from each surveillance camera is sequentially or dividedly streamed to one monitor, or the video information of the surveillance camera is divided into two channels or four channels to multiple monitors. There is a way to stream to monitors by group.                         

However, with such multiple channels, recent digital security systems stream multiple channels of video through one or more monitors, so that the observer continuously monitors multiple channels of video and monitors for abnormalities in each zone. There was a difficulty to be aware of. In addition, in a method in which multiple channels of images are streamed into a sequential full screen through a single monitor, or streamed into a small screen that is divided into the number of channels by the number of channels, the screen that the monitor is suspicious of or wants to see among the multiple channels of video. In this case, the channel must be manually selected to fix the channel using only the image of the selected channel or to activate the divided screen as a full screen.

Therefore, as the monitor continuously stares at the multi-channel screen to recognize the abnormal screen among the images transmitted from the plurality of audit cameras, the monitor easily feels tired and has a low concentration so that the monitor cannot play a faithful role. . In addition, in the monitoring of a screen in which images are streamed by dividing the entire screen of the monitor by the number of channels as described above, there is a difficulty in identifying a channel having fine movement in a small image of the divided area.

In addition, all night offices and families without people must constantly observe images that are almost unchanged in the surveillance of homes that are empty due to travel or going out. There is a disadvantage.

The present invention is to solve the problems of the prior art, the channel of the video signal detected the movement by determining the video signal of the movement of the person or the object is detected among the video signals of the multiple channels received from a plurality of surveillance cameras By only streaming the video of the monitor to the monitor, the monitor automatically detects the motion to easily monitor the area where the abnormality is observed among the surveillance zones monitored by multiple surveillance cameras through the video of the streaming channel. An object of the present invention is to provide a digital security system and an operation method thereof.

In addition, another object of the present invention is to determine a channel for detecting the movement of a person or object among the small images of each channel transmitted from a plurality of surveillance cameras and simultaneously streamed to a screen divided on one monitor, the corresponding motion detected Pop-up or activation of only the channel image on the full screen, the digital security system using the motion detection to easily recognize the image of the surveillance zone where the movement of the person or object occurred among the small images divided by the monitor without special attention and It is to provide a method of operation.

The present invention for achieving the above object is provided with a plurality of surveillance cameras, digital video recorders and monitors in the digital security system that can monitor the image of the surveillance zone monitored by the plurality of surveillance cameras in multiple channels, the Displayed on the monitor only as a motion image signal determination unit for detecting an abnormal indication of the surveillance zone by detecting an image with a movement among images transmitted from a plurality of surveillance cameras, and an image related to the surveillance zone where the abnormal indication is determined. It characterized in that it comprises a video output control unit that can be controlled to do so.

In addition, the image output control unit according to an embodiment of the present invention can control the path of the image transmitted to the multi-channel so that only the motion detected image to the monitor in accordance with the determination of the image is detected motion. And generating an image output control signal, wherein the image output control signal blocks transmission of another channel image to transmit only the image of which the motion is detected to the monitor according to the determination of the image of which the motion is detected. Characterized in that the blocking signal and the operation signal for operating the notification unit that the monitor can recognize.

The present invention provides a method of operating a digital security system having a plurality of surveillance cameras, digital video recorders and monitors to monitor images of a surveillance zone monitored by the plurality of surveillance cameras in multiple channels. Determining an image from which a motion is detected from an image signal transmitted from a surveillance camera of the camera; and determining whether the image determined to be the motion is simply an image of a repeated motion, and (b) there is no image from which the motion is detected. If it is determined that the multi-channel video transmitted from the surveillance camera is streamed to the monitor; (c) if the motion is detected but is determined to be a simple repetitive image, the surveillance camera is treated in the same manner as the motion-free image. Streaming the multi-channel video transmitted from the monitor to (d) If it is determined there is the image that is to be non-image-based movement detection of the image motion is a simple repetition is characterized in that only the motion image signal is detected comprises the step of displaying on the monitor.

In addition, the step (b) according to an embodiment of the present invention is characterized in that to display the image of the multi-channel on the monitor to any one screen selected from a split screen or a sequential full screen.

In addition, the step (c) according to an embodiment of the present invention is characterized in that to display the image of the multi-channel on the monitor screen of any one selected from a split screen or a sequential full screen.

In addition, the step (d) according to an embodiment of the present invention is characterized in that the transmission of other channel video signals without motion detection to the monitor is blocked and only the video signal from which the motion is detected is transmitted.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of an embodiment of the present invention.

1 is a block diagram of a conventional digital security system.

As shown in FIG. 1, the conventional digital security system includes a plurality of surveillance cameras 100, a monitor 110, and a DVR 200.

The plurality of surveillance cameras 100 is preferably installed in the corresponding zone as the number of zones to be monitored to have a wide surveillance range.

The monitor 110 may be configured as a single monitor composed of a large screen, or may constitute a plurality of monitors having a smaller size screen.

The DVR 200 is a configuration that merges the existing VCR function and multiplexer function and digitizes data processing, and streams a multi-channel image transmitted from the surveillance camera 100 to a monitor and transmits the transmitted image information. It is desirable to store data related to and to be able to search, edit and play the recorded video when necessary.

2 is an internal configuration diagram of a DVR provided in a digital security system using motion detection according to an embodiment of the present invention. 3A and 3B are schematic diagrams of a circuit diagram of a motion sensing circuit configured in a motion image signal determining unit and a conversion circuit of a sensing circuit, and FIGS. 3C to 3E are diagrams of the sensing circuit. This is a system diagram related to the addition circuit.

As shown in FIG. 2, the DVR 200 according to an embodiment of the present invention includes a multiplexing unit 210, an image capture unit 220, a first signal processor 230, a controller 240, and storage. The unit 270 includes a second signal processor 250 and an image output unit 260.

The multiplexing unit 210 is connected to a plurality of surveillance cameras (usually four, nine or sixteen) to capture the image sent from the surveillance camera 100 and divided screens (4 split, 9 split, 16 split) Or it transmits to the monitor 110 in sequential full screen. Then, the monitor 110 displays the image transmitted in the multi-channel on a split screen or a sequential full screen. In addition, the multiplexing unit 210 preferably transmits the image sent by the surveillance camera 100 to the monitor 110 as well as the image capture unit 220. In addition, the multiplexing unit 210 reconstructs the screen of the monitor 110 according to an image output control signal transmitted from the controller 240 and the image output unit 260 which will be described later. It is preferable to transmit the video signal transmitted from the monitor 110.

The image capture unit 220 converts an analog image signal transmitted from the multiplexing unit 210 into a digital image signal for each frame. Digitally converted video signal data has a value from 0 to 255. In the conventional NTSC video signal, one frame is composed of an Odd field and an Even field of 525 lines, and each field is divided into a VBI signal and a video signal. do.

The first signal processor 230 is preferably configured to compress the digital video signal for each frame transmitted from the image capturing unit 220 and to extract the image information of each image transmitted from the surveillance camera. Correspondingly, the second signal processor may be configured to restore the separated and extracted image information to an image signal when necessary to display the image including the image information on a screen. The video information preferably includes information such as a surveillance camera channel number, the presence or absence of an alarm, the date and time.

The detailed internal configuration and detailed operating method of the first signal processor 230 and the second signal processor 230 are well-known techniques, and a detailed description thereof will be omitted, and an important part of the first signal processor 230 will be described. The separation unit (not shown), the compression unit (not shown) and the extraction unit (not shown) will be briefly described as follows.

The separation unit (not shown) divides one frame (525 lines × 720 bytes / line) image converted into a digital signal from the image capture unit 220 into two fields, and separates the video signal and the VBI signal. Is done.

The compression unit (not shown) compresses the separated video signal by a predetermined algorithm. In this case, a video compression method may use various known methods. For example, the video compression method may compress a video signal converted into a digital signal using a compression algorithm such as MPEG1 / 2/4 or JPEG / JPEG-2000 or Wavelet. . In addition, when compressing with hardware, separate compression is required, but when compressing with software, the compression unit is omitted, and the control unit may perform the compression process.

The extractor (not shown) extracts the image information from the separated VBI signal. As described above, when the multiplexing unit 210 reconstructs the screen using this information and outputs the image information to the monitor 110 when the video information is inserted into and played in an invisible section of the video signal, the video information is added to the video information. It is preferable that the information such as the included camera number, the presence of the alarm, the date and time can be displayed.

The controller 240 is a component capable of manipulating and controlling the DVR and the received video signal, and a motion video signal determination unit 241 that can determine an image in which a motion is detected from an image transmitted from the surveillance camera. ), When an image of detecting motion is determined by the motion image signal determining unit 241, an image output control unit 242 capable of generating and transmitting an image output control signal for controlling only the image on which the motion is detected to be displayed on a monitor. And a data storage control unit 243 capable of storing the data and the data related to the video signal and information of the motion detected according to the motion detection separately from the data of the general video, and the data recorded through the DVR. DVR that can control all aspects of DVR operation to play or monitor randomly selected channel The smaller the control unit 244 is preferred to be further comprising.

The motion image signal determination unit 241 may be configured with a circuit as described below so as to determine an image in which a motion is detected from the image transmitted from the surveillance camera 100.

Referring to the motion detection circuit, as shown in FIG. 3A, the digital image signal input to the input terminal 301 is input to the first detector 303 which detects the movement of the low frequency signal component of the luminance signal. In the first detector 303, the digital image signal is input to the first frame memory 304, the signal delayed by one frame period in the first frame memory 304 and the input signal of the first frame memory 304 Is input to the first subtractor 305 to generate a one-frame difference signal. The output signal of the first subtractor 305 is input to the low pass filter LPF 306 which removes the signal in the color signal band. The output signal of the LPF 306 includes motion information of the luminance signal low frequency component. When the output signal of the LPF 306 is zero, the image is a still image, and when the output signal is not zero, the image is determined to be a dynamic image. Since the output signal of the LPF 306 has a polarity, the output signal is input to the first absolute value circuit 307 to obtain an absolute value.

Conventional video signals are usually quantized to 8 bits. Therefore, the output signal of the first absolute value circuit 307 is also an 8-bit signal. The switching of the signal processing by the degree of motion of the image is switched to about 10 steps and is performed smoothly. This is controlled by a 4-bit signal. The first conversion circuit 308 has an input / output characteristic as shown in FIG. 3B and nonlinearly converts an 8-bit input signal into a 4-bit signal. As a result, the number of signal lines is reduced and the influence of noise is eliminated by making the output signal zero for the low level input signal.

On the other hand, the transmitted digital video signal is input to the band pass filter BPF 309 which calculates a signal in the color signal band. The output signal of the BPF 309 is input to an automatic color control circuit (ACC) 310 to correct a change in the color signal level due to the frequency characteristic of the transmission line to calculate a color signal having a substantially constant amplitude. The color signal is then demodulated by demodulator 311. When the sampling frequency of the transmitted digital video signal is selected as Δf _sc , at one of four consecutive sampling points, the sampling signal is a signal of-(BY), and at the next sampling point, the signal is (RY) and the next signal. Is (BY), and the next signal is-(RY). Therefore, if the signals-(RY) and-(BY) are inverted, the signals RY and (BY) appear alternately. That is, the output of the demodulator 311 is a sequentially multiplexed signal of two color difference signals RY and BY. The phase of the color carrier is reversed at intervals of one frame as described above. The demodulator 311 operates to cancel phase reversal of the color carrier. The signal in the color signal band applied to the demodulator 311 includes not only a color signal but also a high frequency component of the luminance signal. Thus, the output of the demodulator 311 includes inversion of the high frequency components of the luminance signal.

The output of the demodulator 311 is input to a second detector 312 that detects the movement of the signal in the color signal band. The output signal of the demodulator 311 is input to the second frame memory 313, where it is delayed by one frame period. The output signal of the second frame memory 313 is input to the third frame memory 314 and is delayed by one frame period. The output signal of the demodulator 311 and the signal delayed by two frames by the second frame memory 313 and the third frame memory 314 are input to the second subtractor 315 which calculates two frame difference signals. . If the phase of the high frequency component of the color signal and the luminance signal is the same with respect to the signal spread over the two frame period and the two-frame difference signal is zero, it is a still image. Therefore, if the two-frame difference signal is not zero, the image is determined to be a dynamic image.

The second absolute value circuit 316 and the second conversion circuit 317 operate in the same manner as the first first absolute value circuit 307 and the first first conversion circuit 308, respectively, and the second subtractor 315. ) Output signal is converted into a 4-bit control signal.

The output signal of the first detector 303 and the output signal of the second detector 312 are input to the adding circuit 318 and combined. Accordingly, the output signal of the addition circuit 318 includes motion information of the signal in all areas of the digital video signal.

As shown in FIGS. 3C-3E, the adder circuit 318 is comprised of a comparator 326, a selector 327, an OR circuit 329, adders 328, 330, and a counting circuit 331. It is preferable. In the circuit of FIG. 3C, the two comparators 326 and 342 are compared by the comparator 326 and the larger one is selected by the selector 327. In the circuit of FIG. 3D, two input signals 341 and 342 are added by the adder 328 and the output is clipped by the OR circuit 329 by the most significant bit MSB. In the circuit of FIG. 3E, the input signals 141 and 142 are added by the adder 330, and the average value is calculated by the counting circuit 331. The motion adding circuit 318 compares the two input signals 341 and 342 and selects the smaller one. The output signal of the adder circuit 318 is input to the space-time filter 319, and the space-time filter 319 compares the motion information of the horizontally and vertically adjacent pixels and the past pixels with the output signal of the adder circuit 318. do. The space-time filter 319 includes a coefficient circuit 320, a field memory 321, a line memory 322, a maximum value circuit 323, and a horizontal filter 324. The counting circuit 320 multiplies the output signal of the space-time filter 319 by α (0 <α <1) and inputs the signal multiplied by α to the field memory 321. The maximum value circuit 323 determines the maximum value by the output signal of the addition circuit 318 and the field memory 321 and the line memory 322. The signal selected by the maximum value circuit 323 is horizontally filtered by the horizontal filter 324. In one embodiment of the present invention, the space-time filter 319 is feedback. Thus, the motion information of many pixels is compared with the output signal of the addition circuit 318. When the coefficient α is close to 1, more motion information of the pixels is used, and when the coefficient α is close to 0, less motion information of the pixels is used.

Therefore, the output signal of the first detector 303 and the output signal of the second detector 312 are synthesized by the addition circuit 318 to obtain motion information of the signal in the entire band of the digital image signal. The motion information is filtered by the space-time filter 319 to prevent false detection of fast movement of the object. In this way, the motion information of the image can be detected accurately.

As described above, the image output controller 242 generates a control signal for outputting only the image signal to a monitor when it is determined that the detected image signal is a motion image signal. Is preferred. In addition, the video output controller 242 treats the video signal as a static video when the determined video signal is determined to be an image without change due to repeated motion, even if the video signal of the video is detected. It is preferable that the video output control signal to output only the video to the unit 260 is not configured to be transmitted.

Therefore, when the motion is detected among the multi-channel video signals of the surveillance zone received from the surveillance camera and is determined as the video signal of the surveillance zone channel in which an abnormal symptom occurs, the image output control unit 242 generates the image output control signal. The image output unit 260 transmits the image output unit 260 to transmit the image output control signal to the multiplexing unit 210. The multiplexing unit 210 blocks the video signal transmitted from the surveillance camera 100 and streamed to the monitor in multiple channels according to the video output control signal transmitted as described above, and only the video signal of the motion detected video is detected. To transmit to monitor 110.

That is, in the usual monitor in which the video of the surveillance zone without any abnormality is streamed, the multi-channel video of the surveillance zone is streamed in a sequential full screen or in a split screen divided into full screens, and then the movement of people or objects in the surveillance zone is performed. When an image of a surveillance zone in which an abnormal symptom such as an abnormality is displayed is detected, the monitor streamed to the sequential full screen through the control of the multiplexing unit 210 by the image output control signal generated from the image output control unit. Only the video channel of the zone where the abnormality is detected is fixed to stream only the video of the corresponding zone, or the monitor streamed to the divided screen of the multi-channel can pop up and stream only the video of the zone channel where the abnormality is detected to the full screen. It can be.

The data storage controller 240 determines data of a multi-channel image transmitted from the plurality of surveillance cameras 100 in the storage unit 270 to determine a motion image signal among images transmitted through the multi-channel. The storage unit 241 detects only the data of the image detected by the image of the surveillance zone in which a motion is detected and the abnormality is not an image of the surveillance zone which is not changed by the repeated movement or the like from the image output controller 242. It is preferable to control the data on the transmitted image so that it can be stored in the (270).

The storage unit 270 is preferably made of digital equipment such as an HDD.

The image output unit 260 may be configured to perform a relay role of transmitting the image output control signal and the image information restoration signal transmitted from the control unit and the second signal processing unit 250 to the multiplexing unit 210. Do.

In addition, the DVR 200 is further configured with a notification unit (not shown) when the movement of the person or thing is detected from the video transmitted from the surveillance camera is determined that the abnormal signs in the surveillance zone, the The image output control signal generated by the image output controller 242 may be configured to include a signal related to the operation of the notification unit. Therefore, when the image output control signal is generated, it is also transmitted to the alarm unit to operate a warning light or a buzzer so that the monitor can easily check the image of the zone where the abnormal symptoms occur even when the monitor is not watching the monitor. desirable.

Hereinafter, the operation of the system according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 and 4.

As shown in FIG. 4, the operation of the digital security system using motion detection according to an embodiment of the present invention is preferably performed through the following steps.

First, the plurality of surveillance cameras transmits the surveillance zone image photographed in each surveillance zone to the multiplexing unit 210 as a multi-channel video signal (step S401).

When an analog video signal is received from the plurality of surveillance cameras 100 by the multiplexing unit 210, the multiplexing unit 210 transmits the analog video signal to the image capturing unit 220 and captures the image. The unit 220 converts the received analog video signal into a digital video signal (S402). At this time, the multiplexing unit 210 transmits and displays the image signal transmitted through the multi-channel to the monitor 110. At this time, the moving image determination step and the image output control signal through the image output control unit are received. If so, it is preferable to further include the step of blocking the transmission of the multi-channel video signal to the monitor 110 and controlling to transmit only the video signal to the monitor 110, the motion is detected by the video output control signal. Do.

The first signal processor 230 received from the converted digital image signal image capture unit 220 separates the digital image signal into a video image signal and a VBI signal through a separation unit of the first signal processor 230. (S403 step).

The extractor of the first signal processor 230 extracts image information from the separated VBI signal (S404). The extracted image information may be stored in a storage unit in some cases, and then inserted and restored in a VBI signal section and transmitted to the monitor together with the image signal.

The motion video signal determination unit 241 receiving the separated video video signal determines whether the video signal detects the movement of a person or an object from the video signal (S405).

As a result of the determination, if the motion is not detected in the received video signal, and it is determined that there is no motion of a person or an object in the surveillance zone that transmitted the video signal, the system does not have the motion. The multi-channel image is streamed by transmitting the multi-channel video signal transmitted from the surveillance camera 100 to the monitor 110 via the multiplexing unit 210 without any control. Step S410).

As a result of the determination, when a motion is detected in the received video signal, it is determined whether the motion is an image without change, which is simply repeated (S406). The above judgment is that even if there is a motion detection in the image transmitted from the surveillance camera 100, if the image contains a simple motion without change, which is always repeated in the surveillance zone, this is because an abnormal symptom does not occur in the surveillance zone. In this step, the image of the simple repetitive motion is detected as an image of the area where the abnormal symptom occurs and the display is prevented from being displayed on the monitor.

As a result of the determination in step S406, if it is determined that the video signal detected by the motion is simply a video signal relating to repeated motions, this indicates that there is no abnormal sign in the corresponding monitoring zone. The multi-channel video signal transmitted from the surveillance camera 100 is transmitted to the monitor 110 via the multiplexing unit 210 to stream the multi-channel video (step S410).

As a result of the determination in step S406, when the motion is detected as a video signal that is not simply repetitive from the detected video signal, and is determined to be an image of a surveillance zone where an abnormal symptom occurs, through the data storage control unit 240. Data relating to the video signal and the video information of the surveillance zone where the abnormality has occurred is stored in the storage unit 270 (step S407). Through such a distinctive storage system, it is possible to increase the efficiency of data storage for a storage medium having a finite storage space and to extend the period of exchanging the storage medium or backing up data separately. In addition, when the user wants to reproduce the stored data, the corresponding image information is also loaded along with the image signal to be reproduced, and the second signal processor 250 restores the image information to the image signal to output the image output unit. Send to 260. Accordingly, the multiplexing unit 210 which receives the video signal and the video information to be played back from the video output unit 260 is attached to the playback screen and displayed to be output from the monitor 110.

When the motion is detected and the motion is determined to be a non-repetitive video signal, only the video and the video information of the channel related to the video signal from which the motion is detected are transmitted to the monitor 110 through the video output controller 240. Generates an image output control signal for controlling to transmit and transmits the image output control signal to the multiplexing unit 210 (step S408).

In operation S409, the monitor 110 displays only the image detected by the multiplexer 210 receiving the image output control signal. In general, a multi-channel video signal transmitted from the surveillance camera 100 is directly transmitted to the monitor 110 through the multiplexing unit 210 and displayed, and then detects the movement to cause abnormal signs in the surveillance zone. If it is determined, the multiplexing unit 210 receives an image output control signal from the image output controller 240 to display only the image of the corresponding area on the monitor. The multiplexing unit 210 receiving the image output control signal blocks the transmission of a video signal other than the channel related to the image output control signal among the multi-channel images transmitted to the monitor and transmits the image output control signal to the image output control signal. By streaming only the image of the relevant channel to the monitor 110, the monitor can easily recognize the channel of the zone where the abnormal symptoms occur among the multi-channel screen.

In this case, it is preferable that an alarm sound generated by the image output control signal is generated so that the monitor can easily check the image of the zone where the abnormality sign occurs even when the monitor is not watching the monitor.

Although detailed embodiments of the present invention have been described with respect to specific embodiments, it will be apparent to those skilled in the art that various modifications may be made without departing from the scope of the technical idea of the present invention.

In addition, the scope of the present invention should not be limited to the embodiments described above, it should be obvious that not only the claims described below but also those equivalent to the claims.

As described above, the present invention determines a video signal of the motion detection of a person or an object among the multiple video signals received from a plurality of surveillance cameras to monitor only the video of the channel related to the video signal from which the motion is detected. By fixedly streaming, the monitor has an effect of easily monitoring the zone where the abnormal signs occur among the surveillance zones monitored by multiple surveillance cameras through the image of the channel which is automatically fixed and streamed.

In addition, the present invention is to determine the channel in which the movement of a person or object is detected from the small images of each channel transmitted from a plurality of surveillance cameras to be streamed to the screen divided on one monitor at the same time, and the image of the corresponding channel detected the movement By popping or activating the bay full screen, the monitor can easily recognize the image of the surveillance zone where the movement of a person or an object occurs among the divided small images without special attention.

In addition, in the present invention, when there is a discrimination between the video signals of the multi-channel video signals received from the plurality of surveillance cameras to detect the motion of a person or an object, a warning sound or the like is generated so that the monitor is not watching the screen. There is an effect that can immediately recognize the appearance of abnormal signs.

In addition, the present invention is to automatically determine the image of the detection of the movement of people or objects among the images of the multi-camera received from a plurality of surveillance cameras, and informs the monitor, the monitor is an indication of abnormalities in the surveillance zone without particular attention to the monitoring It can be easily recognized, reducing the fatigue caused by the role of monitoring, and can act as a quick and faithful watcher.

Claims (7)

In the digital security system having a plurality of surveillance cameras, digital video recorders and monitors to monitor the video of the surveillance zone monitored by the plurality of surveillance cameras in multiple channels, A motion image signal determination unit which detects an image with a movement from among the images transmitted from the plurality of surveillance cameras and determines an abnormal symptom of the surveillance zone; And a video output controller capable of controlling the display to be displayed on the monitor only as an image of the surveillance zone in which the abnormality indication is determined. The method of claim 1, wherein the image output control unit According to the determination of the image of the motion is detected motion detection, characterized in that for generating a video output control signal for controlling the path of the image transmitted to the multi-channel so that only the image of the motion is transmitted to the monitor Digital security system. The image output control signal of claim 2, wherein According to the determination of the image of the motion is detected, it is composed of a blocking signal to block the transmission of the other channel image so that only the image of the motion is detected to the monitor and the operation signal to operate the notification unit that the monitor can recognize. Digital security system using motion detection. In the operating method of the digital security system having a plurality of surveillance cameras, digital video recorders and monitors to monitor the image of the surveillance zone monitored by the plurality of surveillance cameras in multiple channels, (a) determining an image in which a motion is detected from the plurality of video signals transmitted from the plurality of surveillance cameras, and determining whether the image in which the motion is determined is a video of a repeated motion; (b) if it is determined that there is no image detected by the movement, streaming a multi-channel image transmitted from the surveillance camera to a monitor; (c) if the motion is detected but determined to be a simple repetitive image, treating the same as the motionless image and streaming the multi-channel image transmitted from the surveillance camera to the monitor; and (d) if it is determined that the motion is detected and the image is not a simple repetitive motion image, displaying only the video signal on which the motion is detected on the monitor. Operation method of digital security system using. The method of claim 4, wherein step (b) And displaying the multi-channel image on the monitor as one screen selected from a split screen or a sequential full screen on the monitor screen. The method of claim 4, wherein step (c) And displaying the multi-channel image on the monitor as one screen selected from a split screen or a sequential full screen on the monitor screen. The method of claim 4, wherein step (d) The method of operating a digital security system using motion detection, characterized in that the transmission of the other channel video signal without motion detection to the monitor, and transmits only the video signal detected motion.

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