KR20070121470A - Digital video recorder and operating method thereof and video surveillance system using it - Google Patents

Abstract

A digital video recorder, an operating method thereof and a video control system using the same are provided to divide event detecting works into two based on real time processing possibility and perform parallel processing, thereby processing a recording work as a basic function of the digital video recorder in real time. A data input unit(10) receives a plurality of data. A main event processor(64) obtains main event information by performing main event detecting work for the plural data of the data input unit, and outputs a predetermined number of data needing a sub event detecting work. A sub event processor obtains sub event information by performing a sub event detecting work for the predetermined number of data outputted from the main event processor. A controller(66) performs a recording work or an event work for the plural data in response to each of the main and sub event information transmitted from the main and sub event processors in parallel.

Description

Digital video recorder and its operation method and video surveillance system using the same

1 is a block diagram of a digital video recorder according to the related art.

2 is a view for explaining a method of operating a digital video recorder according to the prior art.

3 is a block diagram of a digital video recorder according to an embodiment of the present invention.

4 is a diagram illustrating a detailed configuration of an auxiliary memory unit and an auxiliary event detector according to an exemplary embodiment of the present invention.

5 is a view for explaining a method of operation of the digital video recorder of the present invention.

6 is a view for explaining the concept of the operation of the digital video recorder of the present invention.

7 is a diagram showing the configuration of an image control system using a digital video recorder according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video recorder (DVR). In particular, even when an algorithm having a large processing capacity is provided, a digital video recorder and a method of operating the same and a method for operating the same can be stably performed. A video control system to be used.

Digital video recorder, which is in the spotlight in the field of video control based on digital video compression technology, is distinguished from existing analog video cassette recorder (VCR) and compresses the input of closed-circuit television camera. HDD).

Conventional digital video recorders provide only a simple function of digitizing surveillance images of a camera and storing them on a hard disk, but recent digital video recorders include algorithms such as a pattern recognition algorithm, a face recognition algorithm, and a human counting algorithm. Digital video recorders allow for more event detection.

1 is a block diagram of a digital video recorder according to the related art.

Referring to FIG. 1, the digital video recorder includes a data input unit 10, a memory unit 21, an event detector 22, a controller 23, a data storage unit 30, a command input unit 40, and a data output unit ( 50, the data input unit 10 includes an image input unit 11, an audio input unit 12, and a sensor input unit 13, and the data output unit 50 includes a display unit 51 and a remote connection unit 52. ), An alarm output unit 53 is provided.

Hereinafter, the function of each component will be described.

The data input unit 10 receives an image input unit 11 for receiving a plurality of surveillance images provided by the plurality of surveillance cameras 1a to 1n and a plurality of voices provided by the plurality of microphones 2a to 2n. Camera 1a to 1n and microphone 2a to 2n installed in the surveillance area with a voice input unit 12 and a sensor input unit 13 for receiving a plurality of sensor signals provided by the plurality of sensors 3a to 3n. , And the surveillance images, voices, and sensor signals provided by the sensors 3a to 3n are converted into digital data that can be recognized by the digital video recorder, and are stored in the main memory unit 21.

The memory unit 21 temporarily stores the surveillance images, voices, and sensor signals converted into digital data through the data input unit 10 to perform operations of the event detector 22 and operations of the controller 23. Support.

The event detector 22 may additionally include algorithms for performing high performance image processing or sound detection, such as a motion detection algorithm, an object detection algorithm, a pattern recognition algorithm, a face recognition algorithm, and a human counting algorithm. have. In addition, the event detection operation using the above-mentioned algorithms as well as the event detection operation that can be obtained by checking the input of the surveillance images, audios, and sensor signals or whether an error has occurred is performed. Event information generated according to the collection is provided to the control unit 23.

The controller 23 performs a task to be processed in association with the event information collected through the event detector 22 while performing a user's command or an external device command received from the command input unit 40. For example, processing other than recording and display operations for data in the memory unit 21 and monitoring and storage functions such as PTZ camera control, alarm output control, and remote notification function control are also processed.

The data storage unit 30 is implemented as a digital data storage medium such as a hard disk (HDD), and under the control of the control unit 23 compresses and stores the data of the memory unit 21 together with the event information so that the user can later monitor the zone. Search by classifying by star, time, or event.

The command input unit 40 includes a keyboard 41 and a mouse 42 for detecting and obtaining a command of a user, and a communication port 43 for receiving and obtaining a command of an external device. After detecting and obtaining a command of an external device such as a control server, the control unit 23 provides the command.

The data output unit 50 may display a display unit 51 and a controller 23 to display a surveillance image, an audio signal, a sensor signal, and event information so that a user may recognize visually and audibly according to a result of the operation of the controller 23. Remote connection unit 52 for outputting surveillance video, audio, and sensor signals to an external device according to the work result of the operation, and an alarm output unit 53, which is combined with an alarm generating device (not shown) to generate an alarm, The controller 23 supports a display job and an event job of the controller 23.

2 is a view for explaining a method of operating a digital video recorder according to the prior art.

First, the data input unit 10 receives surveillance data such as surveillance images, voices, and sensor signals (S1), converts them into digital data so that the digital video recorder can recognize them, and then stores them in the memory unit 21. Save it.

Then, the event detection unit 22 first detects not only simple events such as input checks and error occurrence checks for surveillance images, voices, and sensor signals stored in the memory unit 21 but also motion detection algorithms and object detection algorithms. , Event detection using various algorithms such as pattern recognition algorithm, face recognition algorithm, human counting algorithm and sound detection. Event information reflecting these event detection task results is collected and provided to the controller 23 (S4).

The controller 23 refers to the event information collected in step S4, and the surveillance images, audios, and the like, of which the surveillance video, voices, and sensor signals stored in the memory unit 21 that require the recording work are recorded. If there are sensor signals (S5), the data is compressed with the event information and then stored in the data storage unit 30 (S6).

If there are no surveillance images, audios, and sensor signals requiring a recording operation or the recording operation is completed, the controller 23 adds PTZ camera control, alarm output control, remote alarm function, etc. corresponding to the generated event information. A task, that is, an event task is performed (S7).

The data output unit 50 displays the current work result so that the user can recognize it visually and acoustically (S9).

As described above, the conventional digital video recorder detects various event information through various algorithms additionally provided in the event detector 22 while storing and displaying data obtained through the current video control operation in real time. It is possible to perform the event task.

However, event detection using algorithms generally processes data such as surveillance video and audio through a complex calculation process to generate new information, and obtains the desired data value. Long working time

When the processing time of the event detector 22 is increased by algorithms too much to detect event information in real time, the operation of the controller 23 is also delayed, thereby delaying or acquiring a recording operation, which is a function of the digital video recorder. If you lose the data, you may not be able to perform normal recording.

In order to solve this problem, conventionally, the data input unit has a separate hardware such as a pattern recognition chip, a face recognition chip, and the number of people counting chip, or has been integrated with an additional processing system. It was expensive and difficult to implement properly.

An object of the present invention is to classify the event detection task into two based on whether or not the real-time processing, and then parallel processing, so that the recording operation, which is a function of the digital video recorder, can always be processed in real time, and a method of operating the same. And to provide an image control system using the same.

The digital video recorder of the present invention for achieving the above object is a data input unit for receiving a plurality of data, and performing the primary event detection operation on the plurality of data of the data input unit to obtain the main event information and at the same time the auxiliary event A main event processor for outputting predetermined data requiring a detection task, an auxiliary event processor for performing auxiliary event detection on predetermined data output from the main event processor, and obtaining auxiliary event information; an event processor and an auxiliary event And a control unit for recording a plurality of data or performing an event task in response to each of the main event information and the auxiliary event information transmitted in parallel from the processing unit.

At this time, the main event detection task collects main event information in real time, and the auxiliary event detection task has a longer working time than the main event detection task and collects auxiliary event information.

The main event processing unit may include a main memory unit for storing a plurality of data of the data input unit, a data branch unit for outputting predetermined data required for an auxiliary event detection operation among the plurality of data stored in the main memory unit, and a stored data in the main memory unit. And a main event detection unit configured to perform a main event detection operation on the plurality of data to obtain main event information and to provide the main event information to the controller.

The auxiliary event processor is configured to perform auxiliary event detection on the predetermined data stored in the auxiliary memory unit and the auxiliary memory unit for storing predetermined data output from the main event processor, to obtain auxiliary event information, and to provide the auxiliary event information to the controller. The auxiliary event detector includes a plurality of distributed event detectors corresponding to each of the predetermined distributed memory units and performs auxiliary event detection on data stored in the corresponding distributed memory units.

In order to achieve the above object, the video control system of the present invention performs a parallel processing of a main event detection operation and an auxiliary event detection operation on monitoring data of a surveillance area, and according to the operation result of the main event detection operation or the auxiliary event detection operation. Surveillance terminal that records or notifies the operation result of the surveillance data, and the video terminal in response to the surveillance data of the monitoring terminal in contact with the surveillance terminal to perform the video control operation to check whether the secondary event occurs through the secondary event task result And a control server that arbitrates monitoring data transmission between the remote terminal and the monitoring terminal.

At this time, the monitoring terminal acquires the main event information by performing a main event detection operation on the data input unit receiving the plurality of monitoring data and the plurality of monitoring data of the data input unit, and at the same time, a predetermined monitoring requiring auxiliary event detection operation. A primary event processor for outputting data, an auxiliary event processor for acquiring auxiliary event information by performing auxiliary event detection on predetermined monitoring data output from the main event processor, and parallel transmission from the event processor and the auxiliary event processor In response to each of the primary event information and the auxiliary event information, the control unit characterized in that to perform a recording operation or a event operation for a plurality of monitoring data.

At this time, the main event detection task collects main event information in real time, and the auxiliary event detection task has a longer working time than the main event detection task and collects auxiliary event information.

The main event processing unit may include a main memory unit for storing a plurality of monitoring data of the data input unit, a monitoring data branch unit for outputting a predetermined monitoring data requiring an auxiliary event detection operation among the plurality of monitoring data stored in the main memory unit, And a main event detection unit configured to perform main event detection operations on the plurality of monitoring data stored in the memory unit to obtain main event information and to provide the main event information to the controller.

The auxiliary event processor is further configured to perform an auxiliary event detection operation on the auxiliary memory unit for storing the predetermined monitoring data output from the main event processing unit and the predetermined monitoring data stored in the auxiliary memory unit, and then obtain the auxiliary event information. And providing an auxiliary event detector.

The operation method of the digital video recorder of the present invention for achieving the above object is an input step of receiving a plurality of data and the main event detection step of obtaining the main event information by performing a main event detection operation on the plurality of data; And an auxiliary event detection step of acquiring auxiliary data among a plurality of pieces of data that require an auxiliary event detection operation, and performing auxiliary event detection operation on the predetermined data to obtain auxiliary event information. And an event processing step of recording a plurality of monitoring data or performing an event task in response to each of the main event information and the auxiliary event information transmitted in parallel from the auxiliary event processor.

The event processing step may include identifying data required for recording in response to each of the main event information and the auxiliary event information, compressing and storing the data together with the corresponding event information, and corresponding to each of the main event information and the auxiliary event information. Identifying and performing event work.

In this case, the main event detection task collects main event information in real time, and the auxiliary event detection task has a longer working time than the main event detection task and collects auxiliary event information.

Hereinafter, a digital video recorder, an operation method thereof, and an image control system using the same will be described with reference to the accompanying drawings.

3 is a block diagram of a digital video recorder according to an embodiment of the present invention.

Referring to FIG. 3, the digital video recorder includes a data input unit 10, a main memory unit 61, a data branch unit 62, a main event detector unit 64, an auxiliary memory unit 63, and an auxiliary event detector unit 65. , A control unit 66, a data storage unit 30, a command input unit 40, and a data output unit 50. The data input unit 10 includes an image input unit 11, an audio input unit 12, and a sensor input unit ( 13, the data output unit 50 includes a display unit 51, a remote connection unit 52, and an alarm output unit 53.

Hereinafter, the function of each component will be described.

The data input unit 10 receives an image input unit 11 for receiving a plurality of surveillance images provided by the plurality of surveillance cameras 1a to 1n and a plurality of voices provided by the plurality of microphones 2a to 2n. The camera 1a to 1n and the microphone 2a to 2n provided in the monitoring area include a voice input unit 12 and a sensor input unit 13 for receiving a plurality of sensor signals provided by the plurality of sensors 3a to 3n. ), And the surveillance images, voices, and sensor signals provided by the sensors 3a to 3n are converted into digital data that can be recognized by the digital video recorder, and stored in the main memory unit 21. .

The main memory unit 61 temporarily stores surveillance images, audios, and sensor signals converted into digital data through the data input unit 10, thereby performing all operations of the main event detector 64 and the controller 66. Support.

The data branch unit 63 checks event detection characteristics of the surveillance images input to the main memory unit 61 to determine whether an auxiliary event detection operation is required. As a result of the check, if there are surveillance images requiring the auxiliary event detection operation, the surveillance images are copied and stored in the auxiliary memory unit 63.

At this time, the secondary event detection operation is generally an event detection operation that cannot be processed in real time because it takes a larger processing capacity and a longer working time than the main event detection operation such as pattern recognition, face recognition, and counting of people. May include an event detection task that does not need to be performed on all input data, and an event detection task that does not require real-time processing.

The surveillance image requiring such an auxiliary event detection operation may be directly set by the user by setting an event detection characteristic for each surveillance image.

The auxiliary memory unit 63 temporarily stores surveillance images that require an auxiliary event detection task under the control of the data branching unit 63 to support the operation of the auxiliary event detection unit 64 and the operation of the controller 66.

The main event detection unit 64 detects an event, for example, whether an input is generated or whether an error has occurred, in which real-time processing of surveillance images, audios, and sensor signals input to the main memory unit 61 is performed. By performing the operation of detecting the event information by checking, the main event information is obtained and then provided to the controller 66.

The auxiliary event detection unit 65 includes algorithms for performing high performance image processing tasks such as a pattern recognition algorithm, a face recognition algorithm, and a human counting algorithm, and the like to assist the surveillance images stored in the auxiliary memory unit 63. After performing the event detection task, the auxiliary event information is obtained and provided to the controller 66.

The auxiliary event detection unit 65 may not process the auxiliary event information in real time, but unlike the recording and monitoring function, the event detection function may not process in real time, so even if all the input data is not used, there is a problem in the event detection itself. Therefore, the recording and monitoring functions, which are the inherent functions of the digital video recorder, are not disturbed.

The controller 66 performs a user command received from the command input unit 40 or a command of an external device. Then, in response to each of the main event and auxiliary event information transmitted in parallel from the main event detector 64 and the auxiliary event detector 65, the recording and display operations for the data of the main memory unit 61 are performed. In conjunction with the event and auxiliary event information, it performs event tasks such as external device control, alarm control, and external notification functions.

That is, the controller 66 performs a task according to the main event information transmitted in real time from the main event detector 64 in real time, but has a predetermined time delay from the auxiliary event detector 65 and according to the auxiliary event information transmitted. It should also be possible to carry out unexpectedly. As a result, the recording operation is always performed in real time according to the main event information, and is additionally performed only when necessary according to the auxiliary event information.

The data storage unit 30 is implemented as a digital data storage medium such as a hard disk (HDD), and under the control of the control unit 66 compresses data of the main memory unit 61 or the auxiliary memory unit 63 together with the event information. It can be saved by searching and classified by monitoring area, time, or event.

The command input unit 40 includes a keyboard 41 and a mouse 42 for detecting and obtaining a command of a user, and a communication port 43 for receiving and obtaining a command of an external device. After receiving and obtaining a command of an external device such as a control server, the control unit 66 is provided.

The data output unit 50 displays the monitor image, audio, sensor signals, and main event and auxiliary event information so that the user can visually and audibly recognize the user according to the operation result of the control unit 66. Under the control of the controller 66, a remote connection unit 52 for outputting not only the surveillance video, audio, and sensor signals but also a notification signal for notifying occurrence of a main event or an auxiliary event, and an external device, and an alarm generating device. It is provided with an alarm output unit (53) for generating an alarm for notifying the occurrence of the occurrence of the main event or the auxiliary event (not shown), and supports the display operation and event operation of the controller 66.

4 is a diagram illustrating a detailed configuration of the auxiliary memory unit 63 and the auxiliary event detection unit 65 according to the embodiment of the present invention.

Referring to FIG. 4, the auxiliary memory unit 63 includes first to nth distributed memory units 63-1 to 63-n, and the auxiliary event detector 65 includes first to nth distributed memory units ( First to nth distributed event detection units 65-1 to 65-n corresponding to the respective 63-1 to 63-n are provided.

Each of the first to nth distributed memory units 63-1 to 63-n stores surveillance images transmitted from the data branch unit 63, respectively.

 Each of the first to nth distributed event detection units 65-1 to 65-n includes algorithms for performing high performance image processing such as pattern recognition, face recognition, and counting of people from the surveillance image. Corresponds to each of the n auxiliary memory units 63-1 to 63-n. When the surveillance image is calculated using the provided algorithms, when the occurrence of a specific event is detected, the control unit 66 generates auxiliary event information including the detected event type and identification information of the surveillance image. To the control unit 66. That is, the auxiliary event task for the surveillance images stored in the first to nth auxiliary memory units 63-1 to 63-n is distributedly processed.

In this case, the type and number of algorithms included in each of the first to nth distributed event detectors 65-1 to 65-n are set differently according to the event detection characteristic of the surveillance video, and the operation of the auxiliary event detector 65 is performed. Further increase the efficiency. For example, the first auxiliary event detector 65-1 includes a pattern recognition algorithm, a face recognition algorithm, and a human counting algorithm, but the second auxiliary event detector 65-2 includes only a face recognition algorithm. It may be.

5 is a view for explaining a method of operation of the digital video recorder of the present invention.

First, the data input unit 10 receives surveillance images, voices, and sensor signals (S11), converts them into digital data so that the digital video recorder can recognize them, and stores them in the main memory unit 61.

Then, the main event detection unit 64 analyzes the surveillance images, voices, and sensor signals stored in the main memory unit 61 to perform simple event detection operations such as image input detection, audio input detection, sensor input detection, and the like. In operation S13, the main event information is collected in real time.

Independent of the operation of step S13, the data branch unit 62 monitors an event detection operation that cannot be processed in real time among the surveillance images stored in the main memory unit 61, that is, a surveillance image requiring an auxiliary event detection operation. In step S14, only the surveillance images required for the auxiliary event detection operation are copied and stored in the auxiliary memory unit 63 (S15).

The auxiliary event detection unit 65 performs an auxiliary event detection operation on each of the surveillance images stored in the auxiliary memory unit 63, has a predetermined time delay, collects auxiliary event information, and provides the auxiliary event information to the control unit 66 ( S16).

The controller 66 may refer to the main event or auxiliary event information collected through step S13 or step S16 and may include surveillance images that require a recording operation among the surveillance images, voices, and sensor signals stored in the main memory unit 61. Check whether there are voices, and sensor signals (S17), and monitor images, voices, and sensor signals that need to be recorded are compressed with corresponding event information and then stored in the data storage unit 30 ( S15).

In step S15, the control unit 66 basically performs recording in accordance with the main event information collected in real time through step S13 in real time, and further transmits auxiliary event information having a predetermined time delay through step S16. Try to do more recordings unexpectedly. Accordingly, the controller 66 may perform recording in real time with reference to the main event information regardless of whether or not the auxiliary event information is transmitted.

When there are no surveillance images, audios, and sensor signals requiring a recording operation or when the recording operation is completed, the controller 66 refers to the main event or auxiliary event information and the event operation required by the current video control operation. After grasping, it performs (S17).

In this case, the control unit 66 basically performs the event operation according to the main event information collected in real time through step S13 in real time, and if the auxiliary event information having a predetermined time delay is further transmitted through step S16, the event accordingly. Allows you to perform additional tasks additionally.

The data output unit 50 displays the current work result so that the user can recognize it visually and acoustically (S18).

As described above, the digital video recorder of the present invention processes the main event detection operation capable of real-time processing of the event detection operation and the auxiliary event detection operation that cannot be performed in real time, so that the recording operation is always performed in real time according to the operation result of the main event detection operation. To be handled.

Accordingly, even if the additional function of the digital video recorder is increased to increase the type and processing capacity of the auxiliary event detection operation that cannot be processed in real time, the real-time storage of data, which is a function of the digital video recorder, can always be stably performed.

6 is a view for explaining the operation concept of the digital video recorder according to the present invention. In FIG. 6, for convenience of explanation, it is assumed that the monitoring data is input in a 100 msec period, the time required for the main event detection task is less than 100 msec, and the time required for the auxiliary event detection task is about 200 msec to 300 msec.

First, in the prior art, as shown in (a), the main event detection task and the auxiliary event detection task were serially processed. Accordingly, the main event detection task and the auxiliary event detection task for the Nth monitoring data are completed after all of the N + 1 and N + 2 supervisory data are transmitted, and the N + 1 and N + 2 supervisory data are lost. The controller 23 performed only the recording operation and the event operation on the N-th monitoring data. That is, there has been a problem that recording and event operations on N + 1 and N + 2th monitoring data cannot be performed.

However, in the present invention, as shown in (b), the main event detection operation and the auxiliary event detection operation are processed in parallel, so that the main event detection operation for each of the Nth to N + 2th monitoring data includes the following monitoring data. Complete before transmission, but only the secondary event detection operation for the Nth monitoring data is completed after the N + 2th monitoring data is transmitted.

Accordingly, the control unit 66 performs recording and event operations on all of the Nth to N + 2th monitoring data in real time according to the operation result of the main event detection operation, but monitors the Nth according to the operation result of the auxiliary event detection operation. Allows more sudden recording and eventing of data.

7 is a diagram showing the configuration of an image control system using a digital video recorder according to an embodiment of the present invention.

As shown in FIG. 7, the video control system is implemented with the digital video recorder of FIG. 3 and includes a plurality of monitoring terminals 100-1 to 100-n, and a plurality of remote terminals 200-1 to 200-n. And a control server 300.

Each of the plurality of monitoring terminals 100-1 to 100-n is implemented as a digital video recorder of FIG. 3 to process main event or auxiliary event detection in parallel to acquire main event or auxiliary event information, and accordingly, a monitoring zone. While recording and displaying monitoring data in real time, the corresponding remote terminal is notified of the operation result of the main event or the auxiliary event detection operation.

Each of the plurality of remote terminals 200-1 to 200-n controls a monitoring data and event information by accessing a corresponding monitoring terminal or controls operations of a camera, a microphone, and a sensor connected to the monitoring terminal and the monitoring terminal.

The control server 300 is connected to the plurality of monitoring terminals 100-1 to 100-n and the user terminals 200-1 to 200-n through a communication network to correspond to the monitoring terminals 100-1 to 100-. n) and the user terminals 200-1 to 200-n, and mediate their data transmission.

As described above, the monitoring terminals 100-1 to 100-n of the present invention basically record monitoring data in real time, and more various main events and auxiliary event information through pattern recognition work, face recognition work, and people counting work. Obtain and provide to the remote terminal. Then, the remote terminals 200-1 to 200-n receive a variety of event information from the corresponding monitoring terminals 100-1 to 100-n and are more diverse without performing a separate image processing operation on the monitoring data. And accurate video control.

Accordingly, the video control system of the present invention includes a digital video recorder capable of supporting real-time recording and more stably supporting additional functions, that is, additional event detection operations, thereby increasing the overall performance and operation efficiency of the system. Can be.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand that you can.

The digital video recorder of the present invention, an operation method thereof, and an image control system using the same are classified into two event detection tasks according to whether or not real-time detection is performed on surveillance data and processed in parallel. This ensures that recording operations that require real-time processing can always be performed reliably, while additional tasks that cannot be processed in real time, such as high-performance image processing such as pattern recognition, face recognition, and number of people, can be reliably performed. do.

Claims (26)

A data input unit configured to receive a plurality of data; A main event processor configured to perform main event detection on a plurality of pieces of data of the data input unit to obtain main event information and to output predetermined data for auxiliary event detection; An auxiliary event processing unit which performs auxiliary event detection operation on the predetermined data output from the main event processing unit to obtain auxiliary event information; And And a controller configured to perform a recording task or an event task on the plurality of data in response to each of the main event information and the auxiliary event information transmitted in parallel from the event processor and the auxiliary event processor. Digital video recorder, characterized in that. The method of claim 1, The main event detection operation collects the main event information in real time, And the auxiliary event detecting task has a working time longer than the main event detecting task and collects the auxiliary event information. The method of claim 1, wherein the secondary event detection operation A digital video recorder comprising an event detection operation that cannot be performed in real time, an event detection operation that does not need to be performed on all input data, and an event detection operation that does not require real time processing. The method of claim 1, wherein the main event processing unit A main memory unit for storing a plurality of data of the data input unit; A data branch unit outputting the predetermined data requiring the auxiliary event detection operation among a plurality of data stored in the main memory unit; And And a main event detection unit configured to perform a main event detection operation on a plurality of data stored in the main memory unit to obtain the main event information and to provide the main event information to the controller. The method of claim 1, wherein the auxiliary event processing unit An auxiliary memory unit for storing the predetermined data output from the main event processor; And And an auxiliary event detection unit configured to perform an auxiliary event detection operation on the predetermined data stored in the auxiliary memory unit to obtain the auxiliary event information and provide the auxiliary event information to the controller. The method of claim 5, wherein the auxiliary memory unit And a predetermined distributed memory unit for storing each of the predetermined data. The method of claim 6, wherein the auxiliary event detection unit And a plurality of distributed event detectors corresponding to each of the predetermined distributed memory units and performing auxiliary event detection on data stored in the corresponding distributed memory units. The method of claim 7, wherein The type of auxiliary event detection performed by each of the predetermined distributed event detection units may be different from each other. The method of claim 1, wherein the data input unit An image input unit configured to receive a plurality of images provided by a plurality of cameras; A voice input unit configured to receive a plurality of voices provided by a plurality of microphones; And And a sensor input unit configured to receive a plurality of sensor signals provided by the plurality of sensors. The method of claim 1, wherein the digital video recorder A display unit displaying a result of the operation of the controller; A remote connection unit outputting a result of the operation of the controller to an external device; And And an alarm output unit for generating an alarm under the control of the controller. The main event detection operation and the auxiliary event detection operation for the monitoring data of the monitoring area are processed in parallel, and the recording operation of the monitoring data is performed or the operation is performed according to the operation result of the main event detection operation or the auxiliary event detection operation. A monitoring terminal for notifying a result; A remote terminal contacting the monitoring terminal and performing a video control operation in response to the monitoring data of the monitoring terminal and checking whether the auxiliary event occurs through the auxiliary event work result; And And a control server for arbitrating surveillance data transmission between the monitoring terminal and the remote terminal. The method of claim 11, wherein the monitoring terminal A data input unit for receiving a plurality of surveillance data; A main event processor configured to perform a main event detection operation on a plurality of monitoring data of the data input unit to obtain main event information and to output predetermined monitoring data requiring an auxiliary event detection operation; An auxiliary event processing unit configured to obtain auxiliary event information by performing an auxiliary event detection operation on the predetermined monitoring data output from the main event processing unit; And The controller may perform a recording operation or an event operation on the plurality of monitoring data in response to each of the main event information and the auxiliary event information transmitted in parallel from the event processor and the auxiliary event processor. Image control system, characterized in that provided. The method of claim 11, The main event detection operation collects the main event information in real time, The auxiliary event detecting task has a longer working time than the main event detecting task and collects the auxiliary event information. The method of claim 11, wherein the secondary event detection operation And an event detection operation that cannot be performed in real time, an event detection operation that does not need to be performed for all input monitoring data, and an event detection operation that does not require real time processing. The method of claim 11, wherein the main event processing unit A main memory unit for storing a plurality of monitoring data of the data input unit; A monitoring data branch unit outputting the predetermined monitoring data requiring the auxiliary event detection operation among the plurality of monitoring data stored in the main memory unit; And And a main event detection unit configured to perform a main event detection operation on the plurality of monitoring data stored in the main memory unit to obtain the main event information and to provide the main event information to the controller. The method of claim 11, wherein the auxiliary event processing unit An auxiliary memory unit for storing the predetermined monitoring data output from the main event processing unit; And And an auxiliary event detection unit configured to perform an auxiliary event detection operation on the predetermined monitoring data stored in the auxiliary memory unit to obtain the auxiliary event information and provide the auxiliary event information to the controller. The method of claim 16, wherein the auxiliary memory unit And a predetermined distributed memory unit for storing each of the predetermined surveillance data. The method of claim 17, wherein the auxiliary event detector And a predetermined distributed event detection unit corresponding to each of the predetermined distributed memory units, and performing a secondary event detection operation on the monitoring data stored in the corresponding distributed memory unit. The method of claim 18, The type of the auxiliary event detection operation performed by each of the predetermined distributed event detection unit may be different from each other. The method of claim 12, wherein the data input unit An image input unit configured to receive a plurality of images provided by a plurality of cameras; A voice input unit configured to receive a plurality of voices provided by a plurality of microphones; And And a sensor input unit configured to receive a plurality of sensor signals provided by the plurality of sensors. The method of claim 12, wherein the monitoring terminal A display unit displaying a result of the operation of the controller; A remote connection unit outputting a result of the operation of the controller to an external device; And And an alarm output unit for generating an alarm under the control of the controller. An input step of receiving a plurality of data; A main event detecting step of obtaining main event information by performing a main event detecting operation on the plurality of data; A secondary event detection step of identifying predetermined data that requires an auxiliary event detection operation among the plurality of data, and performing auxiliary event detection operation on the predetermined data to obtain auxiliary event information; And And an event processing step of recording a plurality of monitoring data or performing an event task in response to each of the main event information and the auxiliary event information transmitted in parallel from the event processor and the auxiliary event processor. Operation method of a digital video recorder, characterized in that. The method of claim 22, wherein the event processing step Identifying data for which a recording task is required in response to each of the main event information and the auxiliary event information, and compressing and storing the data together with corresponding event information; And And identifying and performing an event task corresponding to each of the main event information and the auxiliary event information. The method of claim 22, The main event detection operation collects the main event information in real time, The auxiliary event detecting task has a longer working time than the main event detecting task and collects the auxiliary event information. The method of claim 22, wherein the secondary event detection operation A method of operating a digital video recorder, comprising an event detection operation that cannot be performed in real time, an event detection operation that does not need to be performed for all input monitoring data, and an event detection operation that does not require real time processing. 23. The method of claim 22, wherein the method of operating the digital video recorder is And a type of the auxiliary event detection task for each of the predetermined data is different from each other.

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