KR100940237B1 - CCTV system capable of control monitoring and recording in relates with event occurrence and control method thererof - Google Patents

Abstract

Disclosed are a monitoring system capable of monitoring and recording control in association with an event occurrence and a control method thereof. Surveillance system according to the present invention, a plurality of surveillance cameras installed in at least one surveillance target area to capture a predetermined surveillance area, and detecting whether at least one event occurs among a plurality of events including motion, video loss and alarms. The event detection unit, a key input unit receiving the event search condition information, a memory unit storing the event search condition information, and a detection result signal indicating that at least one event is generated from the event detection unit, the detected event is stored in the memory unit. It is determined whether or not it matches the stored event search condition information. If the event matches the event search condition information, the event occurrence information and predetermined image information corresponding to the event are extracted, and the extracted event occurrence information and image information are stored in memory. And a control unit for processing to be recorded in the unit. As a result, it is possible to easily search for the detected event information, thereby improving the convenience of use.

Surveillance System, Monitoring, Recording, Spot Monitor, Event

Description

Surveillance system capable of monitoring and recording control in conjunction with event occurrence {CCTV system capable of control monitoring and recording in relates with event occurrence and control method thererof}

1 is a block diagram schematically showing the configuration of a conventional monitoring system;

2 is a block diagram schematically showing a monitoring system according to a preferred embodiment of the present invention;

3 is a block diagram showing a detailed configuration of the multiplexer shown in FIG.

4A and 4B, and FIGS. 5A and 5B are views for explaining a monitoring control method when an event detection result signal is received from the event detection unit shown in FIG. 3, and

6 is a flowchart illustrating a control method of the monitoring system shown in FIG. 2.

Explanation of symbols on the main parts of the drawings

101 to 109: multiple surveillance camera 200: multiplexer

210: video input unit 215: decoder

220: frame memory 225: encoder

230: Image output unit 240: Screen divider                 

250: event detector 260: OSD generator

300: main monitor 400: spot monitor

500: VCR

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring system and a control method thereof, and more particularly, to adaptively control monitoring and recording in association with generation of an event such as an alarm or a motion. The present invention relates to a surveillance system and a control method thereof.

Closed-circuit TV (hereinafter referred to as "CCTV") surveillance system includes a camera equipped with at least one CCD (Charge Coupled Device) image pickup device in a surveillance area, and receives an image signal from the installed camera. It is a system for monitoring a situation that occurs in the area to be monitored as a surveillance system that records the recorded image signal and then reproduces the recorded video signal through a display device.

1 is a block diagram schematically showing the configuration of a conventional monitoring system.

Referring to FIG. 1, a surveillance system includes a plurality of surveillance cameras 11 to 14, a multiplexer 20, a monitor 30, and an image recording / reproducing apparatus 40.

The plurality of surveillance cameras 11 to 14 output image signals captured for the surveillance region to the multiplexer 20. The plurality of surveillance cameras 11 to 14 have adapters 11a to 11d for receiving power for driving.

The monitor 30 is controlled by the multiplexer 20 and displays an image signal output from the multiplexer 20.

The image recording / reproducing apparatus 40 is controlled by the multiplexer 20 and records the image signal output from the multiplexer 20 on a recording medium such as magnetic tape and the multiplexer 20 recording the image recorded on the recording medium. And a reproducing section for outputting. The video recording / reproducing apparatus 40 here is usually a video cassette recorder (VCR).

The multiplexer 20 controls overall operations of the plurality of surveillance cameras 11 to 14, the monitor 30, and the image recording / reproducing apparatus 40 according to a control program stored in a memory unit (not shown). In addition, the multiplexer 20 divides the screen of the monitor 30 into a plurality of screens while displaying the video signals output from the surveillance cameras 11 to 14 through the monitor 30. Equipped.

In the monitoring system having the above-described configuration, an event such as an invasion or fire alarm of an outsider is generated while displaying a plurality of channel video signals input from the plurality of cameras 11 to 14 through the monitor 30. When generated, the alarm sound is output and the monitoring area is switched to display on a split screen. In addition, a message indicating an event occurrence is displayed on an OSD screen on a screen in which image information of a channel where an event occurs among divided screens is displayed. The information on the generated event (eg, channel number, event occurrence time, event type, etc.) is stored in the memory unit.                         

When an event search command for confirming whether an event occurs from a user is applied, the multiplexer 20 displays the event occurrence information list stored in the memory unit through the monitor 40. Therefore, the user can check the information about the number, occurrence time and event type of the channel where the event occurred. In order to check the video information on the channel where the event occurred, it is necessary to reproduce the video signal recorded on the recording medium. In this case, the video signal recorded on the recording medium must be reproduced and checked in order, so that the corresponding video signal can be checked, which causes a lot of time.

In addition, since the conventional surveillance system manages the video signals output from the plurality of surveillance cameras 11 to 14 through one monitor, it is difficult to intensively monitor the channel where the event occurs. That is, when an event occurs in a plurality of channels at one time, if only one channel is concentrated and monitored, there is a problem in that an event generated in another channel cannot be checked.

In addition, each video signal input from the plurality of surveillance cameras 11 to 14 is sequentially recorded in the video recording / reproducing apparatus 40 in field or frame units. However, the conventional surveillance system records a video signal output from the surveillance cameras 11 to 14 sequentially in units of frames regardless of the importance of the surveillance region and the occurrence of an event, thereby preventing the recording of important surveillance screens. Can be.

The technical problem to be achieved by the present invention is a surveillance system capable of controlling the monitoring and recording to display a video signal of a plurality of channels output from a plurality of surveillance cameras in conjunction with the occurrence of an event on a display device or to record on a recording medium and its control To provide a way.

In order to solve the above technical problem, the surveillance system according to the present invention, a plurality of surveillance cameras installed in at least one surveillance target area and photographing a predetermined surveillance region, and a plurality of surveillance cameras including motion, video loss and alarms. An event detection unit for detecting whether at least one event has occurred among the events, a key input unit for receiving event search condition information, a memory unit for storing the event search condition information, and informing that at least one event is generated from the event detection unit; When the detection result signal is received, it is determined whether the detected event matches the event search condition information stored in the memory unit, and if the event matches the event search condition information, the event occurrence information and the event are corresponded. Extracts predetermined image information, and extracts the event And a control unit for processing the generation information and the video information to be recorded in the memory unit.

Preferably, the main monitor displaying the composite video signal output from the image output unit on a full screen / split screen, the spot monitor alternately displaying video signals of channels where the event occurs, and the main monitor. A screen splitter may be further configured to divide a screen into at least two screens.

In this case, when the event detection result signal is received, the controller checks the number of channels in which the event occurred, and if the number of channels in which the event occurred is two or more, at least two screens of the main monitor are present. The divider is controlled to be divided into a control unit, and the image output unit is controlled to alternately display video signals of channels in which the event is generated through the spot monitor.

And a video recording / reproducing apparatus for recording the video signals of the plurality of channels output from the plurality of surveillance cameras on a recording medium and reproducing the video signals recorded on the recording medium. If the information matches, the video signals of the plurality of channels are sequentially recorded on the recording medium, and the video signals of the channel where the event occurs are sequentially recorded between the video signals of the plurality of channels.

When the occurrence of the event ends, the controller stops the operation of repeatedly recording the video signals of the channel where the event is generated between the video signals of the plurality of channels which are sequentially recorded.

The event detector may further include a motion detector configured to detect the motion based on a difference between a current frame and a previous frame with respect to the video signal output from the frame memory, and a sync separated by the decoder in response to the video signal. And a sensor unit including a synchronization signal detector for detecting a signal to determine whether the image is lost, and at least one sensor for detecting a fire and an external intruder.

On the other hand, in order to solve the technical problem as described above, after receiving a plurality of video signals output from the plurality of surveillance cameras according to the present invention and the signal processing and display through the main monitor and / or spot monitor, The control method of the monitoring system for reproducing and displaying the video signal recorded and recorded in the memory unit and / or the video recording / reproducing apparatus in association with the video signal of the channel in which the event occurs in association with the step of determining whether the event occurs And comparing the generated event with the event search condition information previously stored in the memory unit when determining that the event has occurred, and when the event and the event search condition information are determined to match. Event occurrence information on the event and image information corresponding to the event And a step of extracting the event that the information and the video information comprises the step of storing in the memory unit.

Here, the search condition information is information set by the user for information on the event search target channel, search start time information, search end time information, and the type of search event.

On the other hand, if it is determined that the event matches the event search condition information as a result of the comparison, determining whether or not to record the video signals of the plurality of channels to the video recording / reproducing apparatus and the determination. As a result, when it is determined whether to record the video signals of the plurality of channels in the video recording / reproducing apparatus, the video signals of the plurality of channels are sequentially recorded on the recording medium, and the video signals corresponding to the channel where the event occurs are sequentially recorded. And repeatedly recording the video signals of the plurality of channels which are stored as.

In addition, the redundant recording step is preferably performed from the time when the event occurs to the time when the event ends.                     

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

2 is a block diagram schematically showing a monitoring system according to a preferred embodiment of the present invention.

As shown in the figure, the surveillance system includes a plurality of surveillance cameras 101 to 109, a multiplexer 200, a main monitor 300, a spot monitor 400, and a VCR 500, which is an image recording / reproducing apparatus.

Each of the plurality of surveillance cameras 101 to 109 is installed in a predetermined surveillance target region, and outputs a plurality of channel image signals photographing a predetermined surveillance region to the multiplexer 200.

The multiplexer 200 performs signal processing on a plurality of channel video signals output from the plurality of surveillance cameras 101 to 109 and outputs them through the main monitor 300 and / or the spot monitor 400, or the VCR 500. Processing to be recorded on a recording medium mounted on the disk). In addition, the multiplexer 200 receives a video signal reproduced by the VCR 500, performs a predetermined signal processing, and then outputs it through the main monitor 300 and / or the spot monitor 400.

The main monitor 300 displays an input image signal in full screen or split screen under the control of the multiplexer 200.

The spot monitor 400 displays the video signals corresponding to the channel where the event occurs in sequence under the control of the multiplexer 200. Here, the event refers to an event such as an image loss, an alarm such as a fire alarm, a motion and a door-bell.                     

The VCR 500 records the video signal output from the multiplexer 200 on the recording medium or reproduces the video signal recorded on the recording medium under the control of the multiplexer 200 and transmits the video signal to the multiplexer 200.

FIG. 3 is a block diagram showing a detailed configuration of the multiplexer shown in FIG.

Referring to FIG. 3, the multiplexer 200 includes a key input unit 205, a video input unit 210, a decoder 215, a frame memory 220, an encoder 225, an image output unit 230, and a screen splitter ( 240, an event detector 250, an OSD generator 260, a memory 270, and a controller 280.

The key input unit 205 is provided with a predetermined function key (not shown) for setting or selecting a function supported by the multiplexer 200. In addition, the key input unit 205 receives the search condition information for the search target event from the user and outputs it to the controller 280 to be described later. The key input unit 205 may be provided in the body of the multiplexer 200. When the function selection signal and the search condition information input signal supported by the multiplexer 200 are input through a remote controller (not shown) which is a remote controller, the key input unit 205 is a light receiving unit that receives a radio signal.

The video input unit 210 sequentially outputs a plurality of channel video signals input from the plurality of surveillance cameras 101 to 109 in a field or frame unit. The video input unit 210 serves as a switching unit for switching the image signal in field or frame units. In addition, the video input unit 210 is provided with a plurality of input terminals (not shown) to receive video signals input from the plurality of surveillance cameras 101 to 109 and video signals input from the VCR 500 unit.

The decoder 215 separates the video signal switched by the video input unit 210 in field or frame units into horizontal and vertical synchronization signals, luminance (Y) and color difference signals (Cb, Cr), and separates the separated analog video signal. Convert to a digital video signal.

The frame memory 220 temporarily stores the digital video signal converted by the decoder 215 in units of frames.

The encoder 225 converts the digital video signal output from the frame memory 220 into an analog video signal, and converts the converted analog video signal into a composite video signal suitable for NTSC or PAL. The composite video signal output from the encoder 225 is output to the VCR 500 and / or the video output unit 230 under the control of the controller 280 to be described later.

The image output unit 230 selectively outputs the composite video signal output from the encoder 225 to the main monitor 300 and / or the spot monitor 400 under the control of the controller 280. In addition, the image output unit 230 may add the OSD signal output from the OSD generator 260 to the signal output from the encoder 225 under the control of the controller 280 to control the main monitor 300 and / or the spot monitor. Output at 400.

The screen splitter 240 processes the video signal output from the video output unit 230 to be displayed on the main monitor 300 in full screen or split screen under the control of the controller 280. That is, the screen splitter 240 may divide the screen of the main monitor 300 into two screens, four screens, and nine screens under the control of the controller 280. In this case, video signals corresponding to different channels are displayed on each of the divided screens.                     

The event detector 250 detects whether an event has occurred.

The event detector 250 includes a motion detector 252, a sync signal detector 254, and a sensor 256.

The motion detector 252 detects motion based on a difference between a current frame and a previous frame with respect to an image signal output from the frame memory 220. For example, the motion detector 252 compares the motion vector of the current frame with the motion vector of the previous frame, calculates a comparison value, and detects that there is motion when the calculated comparison value is greater than or equal to a preset threshold. If it is determined that there is motion, the motion detector 252 outputs the motion detection result signal to the controller 280 which will be described later.

The sync signal detector 254 detects the sync signal separated by the decoder 215. If the synchronization signal is not detected, the synchronization signal detector 254 determines that the image is lost, and outputs an image loss detection result signal indicating the image loss to the controller 280.

The sensor unit 256 is for checking an abnormal state of the set monitoring target area, and includes a sensor for detecting a fire and a sensor for detecting an external intruder. The sensor unit 256 is installed at a predetermined position around each of the surveillance cameras 101 to 109 and outputs a detection result signal detected by each sensor to the controller 280.

The OSD generator 260 may generate a menu screen for setting condition information on a search target event or a menu screen for displaying a list of searched events according to a control signal output from the controller 280 to be described later. Outputs                     

The memory unit 270 stores various control programs necessary to implement the functions of the multiplexer 200. The memory unit 270 stores event search condition information set by the user through the key input unit 205. In this case, the event search condition information means information about a search target channel, search start time information, search end time information, and information about an event type.

Under the control of the controller 280, the memory unit 270 captures a predetermined image captured before and after the event based on event occurrence information such as the date, time, and event type of the event, and the time at which the event occurred. Image information is stored together. In this case, the event occurrence information and the image information stored in the memory unit 270 may be set to be stored every time an event is generated, and may be stored only when the generated event information matches the event search condition information set by the user. Of course, it can be set.

The control unit 280 controls the overall operation of the monitoring system according to the control program stored in the memory unit 270. The controller 280 selectively converts the composite video signal converted by the encoder 225 to the VCR 500 and / or the image output unit 230 according to the operation mode of the surveillance system set by the user through the key input unit 205. Process the output.

First, when the operation mode of the monitoring system is the recording mode, the controller 280 processes the composite video signal output from the encoder 225 to be recorded on the recording medium mounted on the VCR 500. At the same time, the controller 280 outputs an image signal output from the encoder 225 to the image output unit 230 and processes the image signal to be displayed through the main monitor 300 or the spot monitor 400.                     

When the operation mode is the playback mode, the controller 280 reads out a video signal reproduced by the VCR 500 and performs a predetermined signal processing and then displays the same through the main monitor 300. In this case, the output terminal of the VCR 500 is connected to the input terminal of the video input unit 210. The connection relationship between the VCR 500 and the video input unit 210 is shown in solid lines in FIG. 3. Since the signal processing is the same as the signal processing for the video signal input from the plurality of surveillance cameras 101 to 109 as described above, a detailed description thereof will be omitted.

On the other hand, when the operation mode of the monitoring system is the search mode, the controller 280 is the OSD generator so that the event list screen to list up the event occurrence information stored in the memory unit 270 and the image information corresponding thereto is implemented as an OSD screen. Control 260. The OSD generator 260 outputs an OSD signal corresponding to the event list screen to the image output unit 230 under the control of the controller 280. In this case, the image output unit 230 adds an OSD signal to the image signal output from the encoder 225 and outputs the OSD signal to the main monitor 300.

In addition, the controller 280 controls monitoring and recording in response to whether an event detection result signal is received from the event detector 250. That is, when the event detection result signal is received from the event detector 250, the controller 280 determines whether the generated event matches the event search condition information previously stored in the memory 270. If it is determined that the generated event matches the search condition information, the controller 280 extracts current date information and time information at the moment when the event occurs. In this case, the controller 280 preferably includes a timer 282 for counting date information and time information.

The controller 280 stores the date information and time information extracted through the timer 282, the channel information on which the event occurred, the type of event, and predetermined image information corresponding to before and after the time when the event occurred. To record. As such, by recording the event occurrence information and the corresponding video information in the memory unit 270, it is possible to check quickly and easily without reproducing the video signal recorded on the recording medium mounted on the VCR 500 when searching for the detected event. Can be.

In addition, the controller 280 counts the number of channels in which an event occurs, and if the number of counted channels is one, the screen is divided so that the video signal corresponding to the channel in which the event occurs is displayed in full screen on the main monitor 300. The installment 240 is controlled. In contrast, when the number of counted channels is two or more, the controller 280 controls the screen splitter 240 to display each video signal corresponding to the channel where the event is generated on the main monitor 300 as a split screen. do. The controller 280 controls the image output unit 230 to alternately display the image signal corresponding to the channel where the event occurs through the spot monitor 400.

Hereinafter, a monitoring and recording control method will be described, taking the case where the multiplexer 200 according to the present embodiment is a 9-channel multiplexer as an example. Here, the 9-channel multiplexer can be connected to up to 9 surveillance cameras.

The main monitor 300 divides the display into four screens and sequentially displays the video signals of the plurality of channels CH1 to CH9 output from the plurality of monitoring cameras 101 to 109, and the spot monitor 400 displays CH1. If it is determined that an alarm and a movement are detected in CH1 and CH3 while displaying only the screen, the controller 280 divides the screen of the main monitor 300 into two screens as shown in FIG. 4A. To control. As shown in FIG. 4A, the screen of the main monitor 300 is divided into two screens, and each of the divided screens displays image information (not shown) and event information on a channel where an event occurs. In addition, the controller 280 processes the video signals of the generated CH1 and CH3 to be sequentially displayed through the spot monitor 400. That is, as shown in FIG. 4B, the screen of the spot monitor 400 alternately displays the video signals of CH1 and CH3 at predetermined time intervals.

Next, looking at the recording method, if no event occurs first, the normal recording method is the entire channel in the order of CH1-> CH2-> CH3-> CH4-> CH5-> CH6-> CH7-> CH8-> CH9 The video signals for are sequentially recorded on one recording medium in units of frames.

On the contrary, referring to a recording method when an event occurs, if an event occurs while sequentially recording a video signal output from the encoder 225 on a recording medium mounted on the VCR 500, the controller 280 The video signal of the channel where the event has occurred is processed to be recorded more than the video signal of the channel where the event has not occurred. For example, if an event occurs in CH1 and CH3 while recording in the order of CH1-> CH2-> CH3, the recording sequence is taken as an example. "CH1-> CH2-> CH3-> CH1-> CH3-> CH4-> CH1 -> CH3-> CH5-> CH1-> CH3-> CH6-> CH1-> CH3-> CH7-> CH1-> CH3-> CH8-> CH1-> CH3-> CH9 ". As described above, by repeatedly recording the video signal of the channel in which the event occurs, it is possible to intensively manage the channel in which the event occurs.

In another embodiment, when it is determined that an alarm is generated in CH1, CH3, CH5, and CH7 among the entire channels CH1 to CH9, the controller 280 displays the screen of the main monitor 300 as four screens as shown in FIG. 5A. The screen splitter 240 is controlled to divide. As shown in FIG. 5B, each divided screen of the main monitor 300 displays image information (not shown) and event information about a channel where an event occurs. At the same time, the controller 280 controls the image output unit 230 to sequentially display the image signals for the events CH1, CH3, CH5 and CH7 generated by the spot monitor 400. As shown in FIG. 5B, video signals of CH1, CH3, CH5, and CH7 are alternately displayed at predetermined times on the screen of the spot monitor 400.

Next, referring to the recording method, while the video signals output from the encoder 225 are sequentially recorded on the recording medium mounted on the VCR 500 in the order of CH 1-> CH 2-> CH 3, CH 1, CH 3, CH 5 and CH 7 When an event occurs at, the recording sequence recorded on the recording medium is "CH1-> CH2-> CH3-> CH1-> CH3-> CH5-> CH7-> CH4-> CH1-> CH3-> CH5-> CH7". -> CH5-> CH1-> CH3-> CH5-> CH7-> CH6-> CH1-> CH3-> CH5-> CH7-> CH7-> CH1-> CH3-> CH5-> CH7-> CH8-> CH1-> CH3-> CH5-> CH7-> CH9-> CH1 ".

As described above, when an event occurs, the channel in which the event occurs is repeatedly recorded, but the entire channel can be easily monitored by recording the channel in which the event does not occur.

On the other hand, the above description has been made of recording on a recording medium mounted in the VCR 500 without determining whether the generated event matches the event search condition stored in the memory unit 270 when the event occurs. As such, the monitoring system according to the present invention may be implemented to be recorded by the above recording method whenever an event occurs. Alternatively, when the event occurs, whether the generated event matches the event search condition set by the user. It is of course possible to implement whether to determine whether or not to be recorded only if it matches the set search conditions.

Hereinafter, a control method of a monitoring system according to a preferred embodiment of the present invention will be described with reference to FIG.

3 to 6, first, when power is applied to the monitoring system, the controller 280 initializes the monitoring system based on a control program stored in the memory unit 270. When the event search condition setting request signal is received through the key input unit 205, the controller 280 processes the menu screen for setting the event search condition through the key input unit 205 to be displayed through the main monitor 300. do. The user sets the condition information for the event to be searched using the search condition setting menu screen displayed on the screen of the main monitor 300 (S600). The controller 280 performs an operation corresponding to the operation mode received through the key input unit 205. For example, the controller 280 performs a monitoring operation of capturing a surveillance region in which a plurality of surveillance cameras 101 to 109 installed in each surveillance target region are set according to a preset operation pattern (S610).

The controller 280 determines whether an event detection result signal is received from the event detector 250 during the operation corresponding to step S610 (S620). If it is determined in step S620 that no event occurs, the controller 280 switches to step S610.

If it is determined in step S620 that an event has occurred, the controller 280 determines whether the generated event matches the search condition information set by the user in step S600 (S630). If it is determined in step S630 that the generated event does not match the preset search condition information, the control unit 280 receives the information corresponding to the generated event through the main monitor 300 and / or the spot monitor 400. The monitoring operation to display is performed (S640). At this time, the controller 280 checks the number of channels where an event has occurred, and if the number of channels where an event has occurred is one, the video signal corresponding to the channel where the event has occurred is displayed on the full screen through the main monitor 300. Process to be displayed. In this case, the spot monitor 400 is not driven. In contrast, when the number of channels where an event occurs is two or more, the controller 280 divides the screen of the main monitor 300 into a predetermined number of screens and corresponds to the channel where an event occurs in each of the divided screens. Process the video signal to be displayed. The spot monitor 400 processes the video signals corresponding to the channel where the event is generated to be alternately displayed.

On the other hand, if it is determined that the event information generated in step S630 matches the search condition information set by the user, the control unit 280 is the channel information, the date and time information of the event occurred, the type of event, etc. The event generation information and predetermined image information on the channel where the event is generated are extracted (S650). At this time, the video information extracted from the channel where the event occurs is a video signal of a predetermined frame corresponding to the front and rear on the basis of the time when the event occurs.                     

Next, the controller 280 stores the extracted event occurrence information and the image information in the memory unit 270, and sequentially records the video signals of the plurality of channels output from the encoder 225 to the VCR 500. During the recording of the video signal of the channel, the video signal of the channel in which the event is generated is additionally recorded so that the video signal of the channel in which the event occurs is repeatedly recorded (S660). Image information stored in the memory unit 270 is frame-by-frame, it is preferably stored in a compressed state by an image compression unit (not shown). Here, duplicate recording of the channel where the event occurs is performed only while the event occurs, and releases the duplicate recording when the event ends.

As described above, when events such as video loss, alarm, and movement occur, the monitoring efficiency can be improved by adaptively controlling the monitoring and recording of the monitoring system in conjunction with the occurrence of the event.

Although the exemplary embodiments have been described in detail with respect to the present invention by way of example, those of ordinary skill in the art can make various modifications to the above-described embodiments without departing from the scope of the present invention. Will understand. Therefore, the scope of the present invention should be defined not only by the embodiments described but also by the claims below and equivalents thereof.

As described so far, according to the monitoring system and the control method capable of monitoring and recording control in conjunction with the occurrence of the event according to the present invention, when an event such as video loss, alarm and movement occurs, the main monitor and the spot monitor are adapted By controlling the video signal, the video signal of the channel where the event occurs can be monitored. In addition, by recording the video signals of the plurality of channels output from the plurality of surveillance cameras on the recording medium, the monitoring efficiency can be improved by repeatedly recording the video signals of the channel where the event is generated.

In addition, when an event is generated, by storing predetermined image information in the internal memory before and after the event occurrence information and the time at which the event is generated, it is possible to easily search for the detected event information, thereby improving user convenience. .

Claims (9)

A plurality of surveillance cameras installed in at least one surveillance target region to photograph a predetermined surveillance region; An event detector detecting whether at least one event occurs among a plurality of events including a motion, an image loss, and an alarm; A key input unit for receiving event search condition information; A memory unit in which the event search condition information is stored; And When a detection result signal indicating that the at least one event is generated is received from the event detector, it is determined whether the detected event matches the event search condition information stored in the memory unit, and the event is the event search condition. A controller configured to record event occurrence information and image information corresponding to the event in the memory unit to retrieve event occurrence information recorded in the memory unit and image information corresponding to the event if the information matches the information; Surveillance system comprising a. The method of claim 1, A main monitor configured to display the composite video signal output from the video output unit in full screen / split screen; A spot monitor alternately displaying video signals of the channels in which the event occurs; And And a screen splitter for dividing the screen of the main monitor into at least two screens. When the event detection result signal is received, the controller checks the number of channels in which the event occurred, and if the number of channels in which the event occurred is two or more, the screen of the main monitor is divided into at least two or more. And controlling the division unit, and controlling the image output unit such that image signals of channels where the event is generated are alternately displayed through the spot monitor. The method of claim 2, And a video recording / reproducing apparatus, which records video signals of a plurality of channels output from the plurality of surveillance cameras on a recording medium and reproduces the video signals recorded on the recording medium. If the event matches the event search condition information, the controller sequentially records the video signals of the plurality of channels on the recording medium, and the video of the plurality of channels in which the video signals of the channel where the event occurs are sequentially recorded. Surveillance system characterized in that the processing to be duplicated between the signals. The method of claim 3, wherein And when the occurrence of the event ends, the controller stops the operation of repeatedly recording the video signals of the channel where the event is generated between the video signals of the plurality of channels which are sequentially recorded. The method of claim 3, wherein The event detector, A motion detector configured to detect the motion based on a difference between a current frame and a previous frame with respect to the video signal output from a frame memory; A synchronization signal detector for detecting whether the image is lost by detecting a synchronization signal separated by a decoder corresponding to the image signal; And And a sensor unit having at least one sensor for detecting at least one of a fire occurrence and an external intruder. After receiving and processing a plurality of video signals output from a plurality of surveillance cameras, the signal is displayed through at least one of a main monitor and a spot monitor, and the memory unit displays the video signal of the channel where the event is generated in association with an event occurrence. A control method of a surveillance system for reproducing and displaying a video signal recorded and recorded on at least one of a video recording / reproducing apparatus, the method comprising: Determining whether the event has occurred; If it is determined that the event has occurred, comparing the generated event with the event search condition information previously stored in the memory unit; and If it is determined that the event matches the event search condition information, storing event occurrence information on the event and image information corresponding to the event in the memory unit; The control method of the surveillance system, characterized in that the event occurrence information stored in the storing step and the image information corresponding to the event is used for later event search. The method of claim 6, And the search condition information is information set by a user about information on an event search target channel, search start time information, search end time information, and a type of search event. The method of claim 6, Determining whether to record the video signals of the plurality of channels to the video recording / reproducing apparatus, when it is determined that the event matches the event search condition information as a result of the comparing step; And When it is determined whether to record the video signals of the plurality of channels in the video recording / reproducing apparatus, the video signals of the plurality of channels are sequentially recorded on a recording medium, and the video signal corresponding to the channel where the event occurs. And repeatedly recording the plurality of video signals of the plurality of channels which are sequentially stored. The method of claim 8, The redundant recording step is a control method of the monitoring system, characterized in that is performed from the time when the event occurs to the time when the event ends.

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