KR100197586B1 - Camcorder that can be used as a monitoring camera - Google Patents

Camcorder that can be used as a monitoring camera Download PDF

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KR100197586B1
KR100197586B1 KR1019950002618A KR19950002618A KR100197586B1 KR 100197586 B1 KR100197586 B1 KR 100197586B1 KR 1019950002618 A KR1019950002618 A KR 1019950002618A KR 19950002618 A KR19950002618 A KR 19950002618A KR 100197586 B1 KR100197586 B1 KR 100197586B1
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recording
camcorder
memory
luminance signal
signal
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KR960033034A (en
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한택수
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윤종용
삼성전자주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/16—Special procedures for taking photographs; Apparatus therefor for photographing the track of moving objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

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  • Bioinformatics & Cheminformatics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

본 발명은 감시기능을 구비한 캠코더에 관한 것이다. 본 발명의 캠코더는 동영상인식녹화모드상에서 촬영화상을 일정시간간격으로 입력받아 저장하기 위한 복수개의 메모리, 및 메모리에 저장된 두 촬영화상간의 데이타차인 제곱근평균자승(RMS)값을 계산하여 그 RMS값과 기설정한 기준값을 비교하고, 그 비교결과에 따라 화면의 변화를 판단하여 녹화시작 및 정지를 선택적으로 제어하기 위한 제어부로 구성된다. 따라서, 본 발명은 피사체의 움직임을 감지하여 이를 녹화하는 기능에 적용하므로써 캠코더에 감시기능을 추가할 수 있어 캠코더의 이용범위를 확대시킬 수 있는 효과를 제공한다.The present invention relates to a camcorder having a surveillance function. The camcorder of the present invention calculates a root mean square (RMS) value, which is a data difference between a plurality of memories for receiving and storing a captured image at a predetermined time interval in a video recognition recording mode, and its RMS value and And a control unit for comparing the preset reference values, determining the change of the screen according to the comparison result, and selectively controlling the start and stop of the recording. Accordingly, the present invention can add a surveillance function to a camcorder by detecting a movement of a subject and recording the same, thereby providing an effect of extending the use range of the camcorder.

Description

감시기능을 구비한 캠코더Camcorder with surveillance

제1도는 본 발명에 의한 감시기능을 구비한 캠코더의 일 실시예를 나타내는 구성도.1 is a block diagram showing an embodiment of a camcorder having a surveillance function according to the present invention.

제2도는 제1도의 캠코더에서 제어부의 동작을 설명하기 위한 흐름도.2 is a flowchart for explaining an operation of a controller in the camcorder of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

11 : 촬영부 12 : 카메라신호처리부11: recording unit 12: camera signal processing unit

13 : VCR신호처리부 14,15 : 메모리13: VCR signal processor 14, 15: memory

16 : 제어부16: control unit

본 발명은 감시기능을 구비한 캠코더에 관한 것으로서, 특히 피사체의 움직임을 감지하여 녹화시작 및 정지동작을 선택적으로 제어할 수 있도록 한 감시기능을 구비한 캠코더에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camcorder having a surveillance function, and more particularly to a camcorder having a surveillance function capable of selectively controlling a recording start and stop operation by detecting a movement of a subject.

기존의 캠코더(Camcorder)는 그 기능에 비해 사용의 기회나 범위가 작고 넓지 못했다. 따라서, 캠코더를 부재중인 공간(예를 들어, 집, 상가내부등)에 설치하여 감시용카메라로 활용할 수만 있다면 그 사용범위가 넓어지고, 또한 보안이나 안전에 대한 관심이 증가하고 있는 현 추세에 동조할 수 있어 이용도가 증대될 것은 두말할 나위도 없다.Conventional camcorders have not had a small or wide range of opportunities or range of use compared to their functions. Therefore, if the camcorder can be used as a surveillance camera by installing it in an absent space (for example, inside a house or a mall), the range of use is widened and the trend of increasing interest in security and safety is in line with the current trend. Needless to say, it can be used more and more.

따라서, 본 발명의 목적은 캠코더에서 일정시간간격으로 피사체의 움직임으로 인한 화면의 변화를 감지하여 그 화면변화량이 기설정한 기준량을 초과할 때마다 녹화할 수 있는 감시기능을 구비한 캠코더를 제공함에 있다.Accordingly, an object of the present invention is to provide a camcorder having a surveillance function that detects a change in a screen caused by a subject's movement at a predetermined time interval and records it whenever the screen change amount exceeds a preset reference amount. have.

이와 같은 목적을 달성하기 위한 본 발명의 감시기능을 구비한 캠코더는, 피사체를 촬영하고, 그 촬영신호를 처리하여 휘도신호와 색신호로 분리 출력하기 위한 촬영수단과, 상기 촬영수단으로부터 일정시간간격으로 휘도신호를 입력받아 저장하기 위한 제1메모리와, 상기 제1메모리에 저장된 휘도신호를 일정시간간격으로 입력받아 저장하기 위한 제2메모리와, 외부입력에 따라 동영상인식녹화모드로 설정되며, 동영상인식녹화모드에서 상기 제1메모리와 제2메모리에 저장된 인접한 시간간격의 휘도신호를 입력받아 두 휘도신호간의 제곱근평균자승(RMS)값을 구하고, 그 RMS값을 통해 피사체의 움직임을 인식하여 VCR수단의 녹화동작을 제어하기 위한 제어부, 및 상기 제어부의 제어에 따라 선택적으로 녹화모드 및 녹화정지모드로 설정되며, 녹화시마다 사전설정된 시간만큼씩 상기 촬영수단으로부터 인가되는 휘도신호와 색신호를 녹화가능한 형태로 신호처리하여 녹화동작을 수행하고, 녹화정지모드마다 녹화동작을 정지하기 위한 VCR수단을 포함한다.Camcorders with a monitoring function of the present invention for achieving the above object, the shooting means for photographing the subject, processing the photographing signal and outputting the separated signal as a luminance signal and a color signal, and at a predetermined time interval from the photographing means A first memory for receiving and storing the luminance signal, a second memory for receiving and storing the luminance signal stored in the first memory at a predetermined time interval, and a video recognition recording mode according to an external input, In the recording mode, the luminance signals of adjacent time intervals stored in the first memory and the second memory are input to obtain a root mean square (RMS) value between the two luminance signals. A control unit for controlling the recording operation, and selectively set to the recording mode and the recording stop mode under the control of the controller. The signal processing prior to the set time the luminance signal and the color signal applied by the recording means by recording as a possible form of performing recording operation, the VCR comprises means for stopping the recording operation for each recording stop mode.

이하, 첨부한 도면들을 참조하여 본 발명의 바람직한 실시예를 상세히 기술하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명에 따른 감시기능을 구비한 캠코더를 나타내는 구성도이다. 도시한 바와 같이, 본 발명의 캠코더는 카메라를 구비하여 피사체를 촬영하기 위한 촬영부(11)와, 촬영부(11)에서 출력된 피사체의 촬영신호를 입력받아 휘도신호와 색신호로 출력하는 카메라신호처리부(12)를 구비하고 있다. 카메라신호처리부(12)의 출력단에는 휘도신호와 색신호를 입력받아 기록매체에 기록가능한 형태로 신호처리하여 기록계로 출력하는 VCR신호처리부(13)가 연결된다. 카메라신호처리부(12)의 출력단에는 또한 본 발명을 위해 새롭게 블록이 추가되었다. 이 블록에는 카메라신호처리부(12)로부터 일정한 시간간격으로 휘도신호를 입력받아 저장하기 위한 2개의 메모리(14,15)를 구비하고 있다. 이 메모리(14,15)에는 저장되어 있는 휘도신호를 입력받아 피사체의 움직임을 구하고, 그 움직임에 따라 VCR신호처리부(13)의 녹화동작을 제어하기 위한 제어부(16)가 연결되도록 구성된다.1 is a block diagram showing a camcorder having a surveillance function according to the present invention. As shown, the camcorder of the present invention includes a camera 11 for photographing a subject with a camera, and a camera signal for receiving a photographing signal of a subject output from the photographing unit 11 and outputting it as a luminance signal and a color signal. The processing part 12 is provided. An output terminal of the camera signal processing unit 12 is connected to a VCR signal processing unit 13 which receives a luminance signal and a color signal, processes the signal in a form recordable on a recording medium, and outputs the signal to a recording system. At the output end of the camera signal processor 12, a new block has also been added for the present invention. This block is provided with two memories 14, 15 for receiving and storing the luminance signal from the camera signal processing section 12 at regular time intervals. The memory 14, 15 is configured to receive a stored luminance signal, obtain a movement of a subject, and connect a controller 16 for controlling a recording operation of the VCR signal processor 13 according to the movement.

이와 같이 구성된 본 발명의 감시기능을 구비한 캠코더에 대한 동작을 제2도를 참조하여 좀더 구체적으로 설명한다.The operation of the camcorder with the monitoring function of the present invention configured as described above will be described in more detail with reference to FIG.

제2도는 제1도의 캠코더에서 제어부(16)의 동작을 설명하기 위한 흐름도이다.2 is a flowchart for explaining an operation of the controller 16 in the camcorder of FIG.

먼저, 사용자에 의해 외부로부터 동영상인식녹화모드신호가 입력되면 제어부(16)는 동영상인식녹화모드로 설정된다(단계 101) 제어부(16)는 동영상인식녹화모드로 설정된 후(단계 101), 할당된 여유시간이 경과한 후부터 동작을 개시한다(단계 102). 본 발명의 실시예에서는 약 10분 뒤에 동작할수 있도록 설정하였다. 일반적으로 제어부(16)가 동영상익식녹화모드로 설정된 후 바로 동작하지 않고 여유시간을 둔 이유는 사용자를 인식하여 녹화할 수 있기 때문에 사용자의 이동기간을 약 10분정도 할당한 것이다. 제어부(16)에 할당된 여유시간은 사전 설정될 수도 있고, 사용자에 의해 가변조정될 수도 있다. 제어부(16)는 여유분의 시간이 경과되면(단계 102), 바로 동영상인식녹화모드가 시작되어 해당 동작을 수행한다.First, when a video recognition recording mode signal is input from the outside by the user, the controller 16 is set to the video recognition recording mode (step 101). The controller 16 is set to the video recognition recording mode (step 101) and then assigned. Operation starts after the elapse of time (step 102). In the embodiment of the present invention, it is set to operate after about 10 minutes. In general, the reason why the controller 16 does not operate immediately after being set in the video recording mode is to allocate the moving period of the user for about 10 minutes because it can recognize and record the user. The spare time allocated to the controller 16 may be preset or variably adjusted by the user. The controller 16 immediately starts the video recognition recording mode when the spare time elapses (step 102), and performs the corresponding operation.

한편, 적정위치를 설치된 카메라를 구비한 촬영부(11)는 카메라를 통해 피사체를 촬영한다. 촬영화상은 카메라신호처리부(12)로 전달된다. 카메라신호처리부(12)는 촬영부(11)로부터 인가되는 촬영화상은 신호처리하여 휘도신호(Y)와 색신호(C)로 각각 분리하여 출력한다. 여기서, 휘도신호(Y)와 색신호(C)는 일반적으로 디지탈형태이다. 이 휘도신호(Y)와 색신호(C)는 VCR신호처리부(13)로 공급된다. 또한, 제1메모리(14)에도 휘도신호(Y)가 입력되어 저장된다(단계 103). 여기서, 메모리에 색신호(C) 대신 휘도신호(Y)를 저장하여 사용하는 이유는 일정시간간격동안에 촬영 대상 즉, 피사체의 움직임정도를 구하기 위한 제곱근평균자승(Root Mean Square:RMS)값이 색신호보다는 휘도신호에 민감하기 때문이다. 제어부(16)는 약 0.5초가 경과된 후(단계 104), 제1메모리(14)에 저장된 휘도신호를 제2메모리(15)로 이동시켜 저장하고, 다시 카메라신호처리부(12)에서 입력되는 휘도신호를 제1메모리(14)에 저장시킨다(단계 105). 제어부(16)는 이와 같이 0.5초간격으로 카메라신호처리부(12)에서 휘도신호를 입력받아 제1메모리(14)에 저장하고, 제1메모리(14)에 저장된 휘도신호를 독출하여 제1메모리(15)에 저장시킨다. 제어부(16)는 제1메모리(14)와 제2메모리(15)에 저장되어 있는 휘도신호를 독출하여 두 휘도신호간의 제곱근평균자승(이하, RMS라 함)값을 계산한다(단계 106). 휘도신호의 크기가 720(수평방향)×480(수직방향)인 경우 다음의 식1과 같이 RMS값을 계산할 수 있다.On the other hand, the photographing unit 11 having a camera installed at an appropriate position photographs the subject through the camera. The captured image is transmitted to the camera signal processor 12. The camera signal processing unit 12 processes the photographed image applied from the photographing unit 11 and outputs the separated image into a luminance signal Y and a color signal C, respectively. Here, the luminance signal Y and the color signal C are generally in a digital form. The luminance signal Y and the color signal C are supplied to the VCR signal processing unit 13. The luminance signal Y is also input to and stored in the first memory 14 (step 103). The reason why the luminance signal Y is stored and used instead of the color signal C in the memory is that a root mean square (RMS) value for calculating the degree of movement of the photographing object, that is, the subject, is measured for a predetermined time interval. This is because it is sensitive to the luminance signal. After about 0.5 seconds has elapsed (step 104), the controller 16 moves the luminance signal stored in the first memory 14 to the second memory 15, stores the luminance signal, and then inputs the luminance from the camera signal processor 12 again. The signal is stored in the first memory 14 (step 105). The controller 16 receives the luminance signal from the camera signal processing unit 12 at 0.5 second intervals and stores the luminance signal in the first memory 14, reads the luminance signal stored in the first memory 14, and reads the first memory ( 15). The controller 16 reads the luminance signals stored in the first memory 14 and the second memory 15 and calculates a root mean square (hereinafter, referred to as RMS) value between the two luminance signals (step 106). If the magnitude of the luminance signal is 720 (horizontal direction) x 480 (vertical direction), the RMS value can be calculated as shown in Equation 1 below.

여기서,는 제2메모리(15)에 저장되어 있는 0.5초 이전의 휘도신호이고는 제1메모리(14)에 저장되어 있는 휘도신호를 나타낸다. 그래서, RMS값은 0.5초간격으로 입력되어 두 메모리(14,15)에 저장된 일정 크기의 휘도신호간의 차를 제곱근평균자승하여 계산한 값이다. 이 RMS값이 크면 움직이는 피사체가 존재하며 화면의 변화가 있다고 판단할 수 있다. 제어부(16)는 상기 식1을 통해 구한 RMS값과 기설정한 기준값(K)을 비교한다(단계 107). 여기서, 기준값(K)은 동영상이 있음을 의미하는 값으로 실험을 통해 설정된다. 비교단계(단계 107)에서, 제어부(16)는 계산된RMS값이 기준값(K)보다 크면(RMSK), VCR신호처리부(13)를 녹화모드로 변경한다(단계 108). 녹화모드에서, VCR신호처리부(13)는 카메라신호처리부(12)에서 입력받은 휘도신호(Y)와 색신호(C)를 신호처리하여 테이프등의 기록매체에 기록되도록 기록계로 출력한다. 제어부(16)는 VCR신호처리부(13)를 녹화모드로 변경한 후(단계 108), 단계 104로 돌아가 단계를 반복수행한다. 비교단계(단계 107)에서, 제어부(16)는 계산된 RMS값이 기준값(K)보다 작으면, VCR신호처리부(13)의 녹화모를 해제하여 녹화정지모드로 변경한다(단계 109), 녹화정지모드에서, VCR신호처리부(13)는 카메라신호처리부(12)로부터 휘도신호(Y)와 색신호(C)가 입력되어도 신호처리동작을 수행하지 않는다. 제어부(16)는 VCR신호처리부(13)를 녹화정지모드로 변경한후(단계 109), 단계 104로 돌아가 단계를 반복수행한다 이렇게 0.5초이 시간간격으로 RMS값을 계산하여 피사체의 움직임을 감지하므로써 녹화시작 및 정지동작을 피사체이 움직임에 따라 선택적으로 수행한다. 여기서, 0.5초의 기간을 두는 이유는 제어부(16)에서 RMS값을 계산하는 데 걸리는 시간일 수도 있고, 동영상 인식 후 정해진 시간만큼씩 녹화하는데에 걸리는 시간일 수도 있고, 동영상 인식 후 정해진 시간만큼씩 녹화하는데에 걸리는 시간일 수도 있으므로, 사용자가 조정가능토록 한다.here, Is a luminance signal of 0.5 seconds or less stored in the second memory 15, Denotes a luminance signal stored in the first memory 14. Thus, the RMS value is calculated by square root mean squared difference between luminance signals of predetermined magnitude stored in the two memories 14 and 15 at 0.5 second intervals. If this RMS value is large, a moving subject exists and it can be judged that there is a change in the screen. The controller 16 compares the RMS value obtained through Equation 1 with a preset reference value K (step 107). Here, the reference value K is a value indicating that there is a video and is set through an experiment. In the comparison step (step 107), if the calculated RMS value is larger than the reference value K (RMSK), the control unit 16 changes the VCR signal processing unit 13 to the recording mode (step 108). In the recording mode, the VCR signal processing unit 13 processes the luminance signal Y and the color signal C received from the camera signal processing unit 12 and outputs them to the recording system so as to be recorded on a recording medium such as a tape. The control unit 16 changes the VCR signal processing unit 13 to the recording mode (step 108), and returns to step 104 to repeat the step. In the comparison step (step 107), if the calculated RMS value is less than the reference value K, the control unit 16 releases the recording mode of the VCR signal processing unit 13 and changes to the recording stop mode (step 109). In the mode, the VCR signal processor 13 does not perform a signal processing operation even when the luminance signal Y and the color signal C are input from the camera signal processor 12. The control unit 16 changes the VCR signal processing unit 13 to the recording stop mode (step 109), and returns to step 104 to repeat the step. Thus, by calculating the RMS value at this time interval of 0.5 seconds, the motion of the subject is detected. Recording start and stop operations are selectively performed as the subject moves. Here, the reason for giving a period of 0.5 seconds may be the time it takes to calculate the RMS value in the control unit 16, it may be the time it takes to record by a predetermined time after the video recognition, or recording by a predetermined time after the video recognition It may be time to do so it is user adjustable.

상술한 바와 같이, 본 발명은 감시기능을 구비한 캠코더에 관한 것으로 사용자가 직접 촬영을 해야 하는 종래의 캠코더에 비해 사용자가 없는 상황에서도 피사체의 움직임을 감지하여 녹화할 수 있도록 하여 개인의 안전이나, 보안, 사생활보호 등의 요청이 증가하고 있는 현 추세에서 전문 경비용 장비를 구입하지 않더라고 그 기능을 수행할 수 있다. 아울러, 캠코더의 기능확대로 이용도가 증대하리라고 기대된다.As described above, the present invention relates to a camcorder having a surveillance function, so that the user can detect and record the movement of a subject even in a situation where there is no user, compared to a conventional camcorder in which a user needs to shoot directly. In the current trend of increasing demands for security and privacy, these functions can be performed without the purchase of specialized security equipment. In addition, it is expected that the utilization will increase with the expansion of the camcorder function.

Claims (4)

캠코더에 있어서, 피사체를 촬영하고, 그 촬영신호를 처리하여 휘도신호와 색신호로 분리 출력하기 위한 촬영수단; 상기 촬영수단으로부터 일정시간간격으로 휘도신호를 입력받아 저장하기 위한 제1메모리; 상기 제1메모리에 저장된 휘도신호를 일정시간간격으로 입력받아 저장하기 위한 제2메모리; 외부입력에 따라 동영상인식녹화모드로 설정되며, 동영상인식녹화모드에서 상기 제1메모리와 제2메모리에 저장된 인접한 시간간격의 휘도신호를 입력받아 두 휘도신호간의 제곱근평균자승(RMS)값을 구하고,그 RMS값을 통해 피사체의 움직임을 인식하여 VCR수단의 녹화동작을 제어하기 위한 제어부; 및 상기 제어부의 제어에 따라 선택적으로 녹화모드 및 녹화정지모드로 설정되며, 녹화모드시마다 사전설정된 시간만큼씩 상기 촬영수단으로부터 인가되는 휘도신호와 색신호를 녹화가능한 형태로 신호처리하여 녹화동작을 수행하고, 녹화정지모드마다 녹화동작을 정지하기 위한 VCR수단을 포함하는 감시기능을 구비한 캠코더.A camcorder, comprising: photographing means for photographing a subject, processing the photographing signal, and separately outputting the photographed signal into a luminance signal and a color signal; A first memory for receiving and storing a luminance signal from the photographing means at a predetermined time interval; A second memory for receiving and storing the luminance signal stored in the first memory at a predetermined time interval; According to the external input, the video recognition recording mode is set. In the video recognition recording mode, the luminance signals of adjacent time intervals stored in the first memory and the second memory are input to obtain a root mean square (RMS) value between the two luminance signals. A controller for recognizing the movement of the subject through the RMS value and controlling the recording operation of the VCR means; And selectively set to a recording mode and a recording stop mode under the control of the controller, and perform a recording operation by processing a luminance signal and a color signal applied from the photographing means in a recordable form for each preset time for each recording mode. And a VCR means for stopping a recording operation for each recording stop mode. 제1항에 있어서, 제어부의 상기 RMS값은The method of claim 1, wherein the RMS value of the control unit 이며, 여기서 N과 M은 휘도신호의 수평방향을 수직방향의 크기이고,는 상기 제2메모리에 저장되어 있는 휘도신호이며,는 제1메모리에 저장되어 있는 휘도신호인 감시기능을 구비한 캠코더.Where N and M are the magnitudes in the horizontal direction of the luminance signal, Is a luminance signal stored in the second memory, Is a camcorder having a monitoring function which is a luminance signal stored in a first memory. 제2항에 있어서, 상기 제어부는 상기 식을 통해 구한 RMS값과 기설정한 기준값을 비교하여, RMS값이 기준값 이상이면 상기 VCR수단을 녹화모드로 설정하고 RMS값이 기준값 이하이면 상기 VCR수단을 녹화정지모드로 설정하는 것을 특징으로 하는 감시기능을 구비한 캠코더.The method according to claim 2, wherein the control unit compares the RMS value obtained by the above formula with a preset reference value, and sets the VCR means to a recording mode when the RMS value is equal to or greater than the reference value and sets the VCR means when the RMS value is equal to or less than the reference value. Camcorder with a surveillance function, characterized in that the recording stop mode. 제3항에 있어서, 상기 제어부는 동영상인식녹화모드에서 사용자를 인식하여 녹화하지 않도록 여유시간을 설정하여, 그 여유시간이 경과한 후부터 동작을 수행하는 것을 특징으로 하는 감시기능을 구비한 캠코더.The camcorder with a surveillance function according to claim 3, wherein the controller sets a spare time so as not to record by recognizing the user in the video recognition recording mode, and performs the operation after the spare time has elapsed.
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