KR20100030691A - Monitoring method and system using sound detection - Google Patents

Abstract

PURPOSE: Monitoring method and system using sound detection through acoustic sensing are provided to widen the range of the monitoring region by taking a photograph of a dead zone where the camera installation is difficult. CONSTITUTION: A sound sensor unit(200) senses the acoustic generated in a monitoring region. A controller(300) receives the sensed acoustic, decides as event occurrence. The control signal is created and transmitted. The control signal stores as video data by photographing a monitoring region where acoustic is detected. A photographing unit(400) takes a photograph of the monitoring region in response to the control signal. An output unit(500) outputs the photographed image data to the outside.

Description

Monitoring method and system using sound detection

The present invention relates to a method and system for monitoring through acoustic sensing.

More specifically, the first step of detecting the sound generated from the surveillance area and transmitting the detected sound; The second step of generating the control signal to determine the detected sound as an event occurrence, and to record the surveillance region in which the sound is detected and to store the image data, and to capture the surveillance region in response to the control signal, and the captured image It relates to a method and system for monitoring through sound detection comprising a third step of transmitting data.

In general, a digital video recorder (DVR) converts an analog video signal input through a camera into a digital signal, and compresses and restores the video using MPEG (Moving Picture Experts Group), an international video compression method. And a reproducing device, and various surveillance that must constantly monitor the space such as large discount stores, banks, apartments, schools, hotels, government offices, subways, or crowded spaces such as unmanned base stations, unmanned substations, and police stations. Applied to the system.

These DVRs are designed to improve the inconvenience, such as the need for frequent video tape replacement due to poor video quality when the VCR (Video Cassette Recorder) device used for recording surveillance cameras repeatedly records several times. .

In other words, the DVR uses a digital storage medium such as HDD (Hard Disk Drive) or DVD (Digital Video Disk) instead of the video tape used in the VCR. It is possible to record or play for a long time by compressing and restoring a signal. In particular, it is possible to quickly search and replay stored images, and to edit and transmit a video signal.

On the other hand, the DVR has a multi-channel display function that can divide and monitor multiple camera images on one monitor, an image transmission function that can monitor recording search and real-time screen through a modem or LAN even at a long distance, and auto pan. With various functions such as (Auto Pan), Tilt, Zoom, Control, image enlargement and editing functions, it is gaining attention in the field of security surveillance based on digital image compression technology.

However, despite the above functions, the DVR so far can change the monitored area only by manually controlling by the monitor and performing PTZ (Pan, Tilt, Zoom) control of the camera. There was a difficulty in monitoring and controlling the movement of the camera.

Due to the above difficulties, due to carelessness or lack of monitoring personnel, the area to be monitored cannot be continuously checked, and the monitoring system frequently fails to achieve its purpose.

In particular, since the area that can be photographed through a single camera is limited, even a camera capable of PTZ control becomes impossible to monitor itself in an area (shading area) that cannot be photographed without an operation by a monitor. .

To solve this problem, it is possible to minimize the shadow area by installing a larger number of cameras, but this requires the monitor to check more shots, which adds to the burden of surveillance work. This will reduce your concentration.

In addition, if a large number of expensive PTZ control cameras are installed, there is a problem that the installation cost of the surveillance system is very increased.

Due to such a problem, the monitoring method and system using the acoustic detection of the present invention can widen the range of the surveillance area by photographing the rectangular area through the acoustic detection even in a blind area where camera installation is difficult.

In addition, by controlling the PTZ camera through sound detection, it is possible to use the PTZ camera more efficiently.

In order to achieve the above object, the monitoring method through the sound detection according to the present invention includes a first step of transmitting a sensed sound by detecting the sound generated from the monitoring area; The second step of generating the control signal to determine the detected sound as an event occurrence, and to record the surveillance region in which the sound is detected and to store the image data, and to capture the surveillance region in response to the control signal, and the captured image And a third step of transmitting data.

According to a more preferable aspect of the present invention, the method for monitoring through sound detection further includes a fourth step of outputting the captured image data to the outside.

In particular, the monitoring method through the sound detection in accordance with a feature of the present invention includes a second step of converting the detected sound into a digital signal, and further comprising the step of determining that the event occurs when the digital signal is above a predetermined threshold value; It features.

In order to achieve the above object, the monitoring system through the sound detection according to the present invention includes a sound detection unit for detecting the sound generated in the monitoring area; The controller receives the detected sound and determines that an event is generated, and generates and transmits a control signal to capture and store the surveillance region in which the sound is detected as image data, and the corresponding sound detected in response to the control signal. It includes a photographing unit for photographing the surveillance area.

According to a more preferable feature of the present invention, the monitoring system through the sound detection is characterized in that it further comprises an output unit for outputting the image data taken by the imaging unit to the outside.

In particular, the monitoring system through the sound detection according to a feature of the invention is characterized in that the control unit includes a control unit including a digital converter for converting the received sound into a digital signal.

In particular, the monitoring system according to an aspect of the present invention is characterized in that it comprises a control unit including a comparison controller for generating a control signal by comparing the digital signal of the received sound with a set threshold.

According to a more preferable aspect of the present invention, a system for monitoring a sound includes a pan that stores position coordinates of the corresponding surveillance region where sound can be sensed, and rotates to the position coordinates when the control signal is input, And a photographing unit including a camera including at least one of a tilt and a zoom function.

As described above, the inventors of the present invention provides a method and system for monitoring a sound through an acoustic detection even in a blind area where a camera is difficult to install, thereby widening the range of the monitoring area.

In addition, by controlling the PTZ camera through the sound detection, there is an effect of using the PTZ camera more efficiently.

Examples of the monitoring method and system through the sound detection according to the present invention can be applied in various ways, hereinafter with reference to the accompanying drawings will be described a preferred embodiment.

1 is a flow chart of the monitoring method through the sound detection according to an embodiment of the present invention.

As shown in FIG. 1, in the monitoring method using sound detection, a plurality of PTZ cameras are difficult to install due to a high price, or a sound detection unit is installed in an invisible blind area even if a PTZ camera is installed. Check whether the sound generated in the (S101).

When the sound generated in the corresponding surveillance area and the blind area is detected, the previously detected sound is converted into a digital value (S102). In this case, since the sound is an analog state, it is preferable to convert the detected sound into a digital state for sampling processing of the sound.

Thereafter, a digital value obtained by converting the detected sound is compared with a preset threshold value of the corresponding surveillance area and the blind area, which are stored in advance (S103). It is determined that has occurred and generates a control signal (S104).

The control signal is a signal that determines that an event has occurred and rotates the PTZ camera to the corresponding surveillance area and the blind area where the event has occurred so as to photograph the surveillance area and the blind area.

In response to the generated control signal, a PTZ camera that is photographing another area other than the corresponding surveillance area and the blind area where the sound is sensed stops photographing the current area and moves to photograph the corresponding surveillance area and the blind area. And it rotates to change the shooting area of the PTZ camera (S105).

At this time, the process of changing the shooting area of the PTZ camera in detail.

The PTZ camera pre-stores the position coordinates where the sound detection unit is located through a preset function of the PTZ camera. When a sound is detected through the sound detection unit above a predetermined threshold value, it is determined that an event occurs in the corresponding area and an alarm is generated. At this time, the audio constituting the sound detection unit is already set for each input channel in the DVR, it is possible to determine from which audio in the sound detection unit the sound detected by the sound detection unit.

Therefore, when sound is detected above the set threshold value, the PTZ camera corresponding to the input channel where the sound is detected is moved and rotated to the position coordinate of the pre-stored audio through the preset function.

The PTZ camera captures and records the changed shooting area (S106). In this case, the PTZ camera may perform the pan, tilt and zoom functions by receiving control signals for performing pan, tilt and zoom functions in addition to shooting and recording from a controller.

Alternatively, when there are a plurality of PTZ cameras used in this monitoring method, it may occur when the areas photographed by the PTZ cameras overlap each other. In this case, image data of various angles of the corresponding area may be captured and stored. It can be used as a surveillance device.

After the movement and rotation of the PTZ camera is completed, photographing of the changed area is started. When the shooting and storing of the event generation area is completed for the set time according to the event duration, the PTZ camera moves back to the position before moving to the event generation area and captures the corresponding area.

The PTZ camera changes the photographing area to the area where the event occurs, and transmits the image information photographing the photographing area to the output unit for the user to view (S107).

With reference to Figure 2 looks at the monitoring system through the acoustic detection of the present invention.

As shown in FIG. 2, the monitoring system through the sound detection includes a sound detection unit 200, a control unit 300, a photographing unit 400, and an output unit 500.

The sound detection unit 200 detects the sound generated in the surveillance area and the blind area difficult to monitor the image and transmits the sound to the control unit 300. At this time, the sound detection unit 200 is preferably a sound receiving apparatus generally used, such as a microphone.

The control unit 300 determines the sound received from the sound detection unit 200 as an event occurrence, and generates a control signal for controlling the photographing of the area where the sound is detected, the digital converter 310 and the comparison controller ( 330).

The digital converter 310 converts the received sound into a digital value in order to sample the received sound as a digital value because the sound received from the sound detection unit 200 is an analog state.

The comparison controller 330 receives and stores a setting threshold value for a sound generated in a corresponding surveillance area and a blind area from a user, and compares the stored setting threshold value with a digital value of the sound converted in the digital converter.

The photographing unit 400 includes a photographing apparatus for obtaining image information of a corresponding surveillance area and a blind area. In this case, the photographing apparatus is preferably a PTZ camera including a pan, tilt, and zoom functions.

At this time, it is preferable that the control unit generates a camera control and control signal through the DVR system.

The output unit 500 displays the image information acquired through the photographing unit for viewing by a user or the outside. At this time, the output unit is preferably a PC monitor.

3 shows an example of the implementation of the monitoring system through the acoustic detection of the present invention.

As described above, the monitoring method and system through the acoustic detection of the present invention has the advantage of widening the range of the surveillance area by photographing the rectangular area through the acoustic detection even in the blind area difficult to install the camera.

In addition, by controlling the PTZ camera through sound detection, there is an advantage of using the PTZ camera more efficiently.

The monitoring method and system through sound detection according to the present invention have been described above. Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the following claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

1 is a flow chart of the monitoring method through the sound detection according to an embodiment of the present invention,

2 is a block diagram of a monitoring system through sound detection according to an embodiment of the present invention,

3 is a view showing an implementation of the monitoring system through the sound detection according to an embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

200: sound detection unit 300: control unit

310: digital converter 330: comparison controller

400: recording unit 500: output unit

Claims (8)

A first step of detecting sound generated from the surveillance region and transmitting the detected sound; A second step of determining the detected sound as an event occurrence and generating a control signal to capture a surveillance region in which the sound is detected and to store it as image data; And a third step of photographing the corresponding surveillance region in response to the control signal and transmitting the photographed image data. The method of claim 1, And a fourth step of outputting the captured image data to the outside. The method of claim 2, The second step may further include converting the detected sound into a digital value, and determining that the event is generated when the digital value is equal to or greater than a predetermined threshold value. A sound detection unit for detecting sound generated in the surveillance region; A control unit which receives the detected sound and determines that an event is generated, and generates and transmits a control signal to capture and store the corresponding surveillance area where the sound is detected as image data; And a photographing unit configured to photograph the corresponding surveillance area in which sound is sensed in response to the control signal. The method of claim 4, wherein And an output unit for outputting the image data photographed by the photographing unit to the outside. The method of claim 5, The controller includes a digital converter for converting the received sound into a digital value. The method of claim 6, The controller includes a comparison controller for generating a control signal by comparing the digital value of the received sound with a set threshold value. The method of claim 4, wherein The photographing unit stores position coordinates of the corresponding surveillance region where sound can be sensed, and at least one of pan, tilt, and zoom functions rotates to the position coordinates when the control signal is input. Surveillance system through a sound detection, characterized in that it comprises a camera comprising one.

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