KR20160016022A - CCTV systems equipped with storage capabilities Events - Google Patents

Abstract

The present invention relates to a closed circuit television (CCTV) system having an event storage function, which comprises: a camera (1) for photographing a subject to output an image signal thereof; a data storage unit (2) for storing the image signal outputted from the camera (1); a sensor (3) for sensing a motion of a particular object; an event generation unit (4) for converting a generation time of a sensed signal provided by the sensor (3) into an index file which can be added to an image photographed by the camera (1) in order to store the same in the data storage unit (2); and an encoding unit (5) for merging the image signal stored in the data storage unit (2) and the index file stored in the data storage unit (2) to compress and encode the image signal, and then storing the same in the data storage unit (2). Accordingly, the occurrence time point of the particular event is stored with the image to be separately identified in a CCTV image continuously photographed and stored by using an index, thereby separately searching for the occurrence time point of the particular event in the stored image so as to significantly improve security and utilization of the CCTV.

Description

[0001] CCTV systems equipped with event storage function [

[0001] The present invention relates to a CCTV system having an event storage function, and more particularly, to a CCTV system having an event storage function, in which a time of occurrence of a specific event repeatedly generated in a CCTV image continuously captured and stored is stored together with an image, To a CCTV system having an event storage function which enables searching of a CCTV system and maximizing utilization of the CCTV system.

Closed circuit television (CCTV) refers to a TV system in which a specific person can view an image using a TV in a specific facility, and is also referred to as a closed circuit television.

That is, the CCTV captures an image using a CCD (Charge Coupled Devices) camera installed in a specific place, and outputs the captured image using a monitor so that the manager can remotely monitor the situation in which the camera is installed using the monitor In addition, the image captured by the camera can be stored and stored for a predetermined period of time or for a predetermined period of time using a separate storage unit.

Such CCTVs are widely used not only for industrial, educational, medical, traffic control monitoring, disaster prevention, and in-house image information transmission, but also for crime prevention and security purposes , Has a limited space such as a public hall, an elevator, a parking lot, etc., as well as a wide area used by the public, such as a residential alleyway, various public facilities, and a crime area with frequent crime. This is because CCTV installations are installed in order to prevent the range of inconvenient facilities and CCTV installation has been increasing as practical effects such as reduction of crime rate have been proved.

Meanwhile, a storage unit for storing images photographed by a CCTV camera has been stored using a VCR (Video Cassette Recorder) system in the past. The VCR system records an analog video signal input from a camera on a magnetic tape, It is difficult to record a long time image on one magnetic tape because of a very small capacity, so that it is necessary to record an image using a plurality of magnetic tapes, so that not only a great deal of inconveniences such as replacement of a magnetic tape for image recording, If the storage period is long, a large number of magnetic tapes must be used to record and store the images. Therefore, there is a spatial inconvenience in storing a plurality of magnetic tapes, and the apparatus for recording and authoring images on the magnetic tape has a large volume, Disadvantages that require a lot of installation space to construct the whole .

In addition, the magnetic tape has a problem in that when the image is repeatedly recorded / erased / reproduced due to technical limitations, the recording quality is degraded gradually due to deterioration of the magnetic tape, resulting in a short service life.

The DVR (Digital Video Recording) system was developed. The DVR system converts a video signal input from a camera into a digital signal and compresses the video signal into a large-capacity data storage unit such as a hard disk drive (HDD). The DVR system not only real- It is possible to minimize the space required for the system configuration. Since the video signal is compressed and stored as a digital signal, a large amount of video is repeatedly recorded It is a common practice to store video by using DVR system in most CCTV systems installed recently.

Patent Registration No. 10-0176157 Patent Registration No. 10-0995569

In the conventional CCTV DVR system as described above, images captured by a camera are converted into digital images and stored in a compressed format, so that stored images can be retrieved at high speed. That is, the image stored in the hard disk drive can be reproduced at a high speed such as 2x / 4x using a video reproduction program.

Therefore, when playing an image stored in the hard disk drive to search for a specific storage point where a user wants to search a stored image, if the total playback time of the image is 24 hours, if the image is played at 2x speed, A reproduction time of a time is required. When reproduction is performed at 4 times speed, a reproduction time of a maximum of 6 hours is required, thereby shortening the time required for searching for a specific plane of incidence.

However, in the high-speed playback function as described above, the entire playback time is shortened by rapidly reproducing the entire image. However, in the case of an image with a storage time of several tens of hours, In addition, as the playback speed increases, it becomes difficult to accurately identify a specific scene or a specific event in the video. Therefore, when the desired screen is shot in a very short time, it is difficult to find the corresponding screen in high- There is a problem in that it takes a long time to find a specific screen in the whole image.

As an example, in case of a violent crime in a high-rise apartment where automatic doors and CCTV are automatically opened and closed on the common entrance, CCTV installed in the common entrance is analyzed for confinement of the suspects, Since the time required for an outsider to access the common entrance is only a few seconds, in order to find a specific screen which is only a few seconds in the image taken for a few hours to a few hours, The criminal who has committed the crime has enough time to conceal, conceal, or escape the crime, thereby making it difficult to solve the crime promptly. As a result, The CCTV system looks for a specific screen search The other had a poor utilization due to difficult problems.

A CCTV system having an event storage function of the present invention is a camera system for photographing a subject and outputting a video signal of the camera. A data storage unit 2 for storing video signals output from the camera 1; A sensing sensor unit 3 for sensing the movement of a specific object; An event generation unit 4 for converting the generation time of the detection signal provided from the detection sensor unit 3 into an index file that can be attached to the image photographed by the camera 1 and storing the converted index file in the data storage unit 2, ; An encoding unit 5 for compressing and encoding the video signal by merging the video signal stored in the data storage unit 2 and the index file stored in the data storage unit 2 and storing the compressed video signal in the data storage unit 2, It is possible to accomplish a purpose of enabling selective retrieval at a specific event occurrence time in a stored image by storing the time of occurrence of a specific event in the CCTV image successively photographed and stored together with the image using an index so as to be separately identifiable have.

The CCTV system having the event storing function according to the present invention stores CCTV images continuously recorded and stored together with images so that the occurrence time of specific events occurring repeatedly can be separately identified, , It is possible to selectively search at the time of occurrence of a specific event, thereby greatly shortening the time required for CCTV image search, thereby maximizing the utilization of the CCTV system.

In addition, the CCTV system having the event storage function of the present invention can be easily applied to existing CCTV systems with a small cost, so that the CCTV system has excellent economical efficiency and greatly enhances the security and efficiency of the existing CCTV system.

1 is a block diagram illustrating a configuration of a CCTV system having an event storage function according to an embodiment of the present invention.
2 is a diagram illustrating an installation configuration according to an embodiment of a CCTV system having an event storage function of the present invention.
3 is a diagram illustrating an example of a usage state of a CCTV system having an event storage function according to an embodiment of the present invention.

Hereinafter, the configuration and operation of the CCTV system having the event storage function according to the present invention will be described in more detail with reference to the accompanying drawings.

A CCTV system having an event storage function of the present invention includes a camera (1) for photographing a subject and outputting the video signal; A data storage unit 2 for storing video signals output from the camera 1; A sensing sensor unit 3 for sensing the movement of a specific object; An event generation unit 4 for converting the generation time of the detection signal provided from the detection sensor unit 3 into an index file that can be attached to the image photographed by the camera 1 and storing the converted index file in the data storage unit 2, ; An encoding unit 5 for compressing and encoding the video signal by merging the video signal stored in the data storage unit 2 and the index file stored in the data storage unit 2 and storing the compressed video signal in the data storage unit 2, Respectively.

The camera 1 for photographing the subject and outputting the video signal generates only a video signal or a video signal including a voice signal and outputs the video signal in an analog or digital manner. To the data storage unit (2).

When the camera 1 outputs a video signal in an analog manner, an ADC (analog digital converter) for converting the video signal output in an analog manner into a digital signal is added to the data storage unit 2 As shown in Fig.

The data storage unit 2 for storing video signals output from the camera 1 may be a built-in or external hard disk drive installed in a computer or a storage device for storing large amounts of data such as a memory card Any possible medium is possible.

The sensing sensor unit 3 for sensing the movement of the object can be any sensor that directly or indirectly senses the movement of a specified object and provides it by exchanging it with an electric signal.

That is, in addition to a displacement sensor, a pressure sensor, an acceleration sensor, and a vibration sensor infrared sensor that detect the movement of the object, a light sensor that detects the brightness of light according to movement of the object, And a magnetic sensor that detects a change in induced current due to movement of an object using a coil and a magnet is also possible.

The event generation unit 4 stores the occurrence time of the detection signal provided by the detection sensor unit 3 as an index file. The event generation unit 4 detects a motion of a specific object, As an index file. Accordingly, the event generation unit 4 includes a time circuit for automatically detecting the provided time of the sensor signal provided by the detection sensor unit 3, a time circuit for automatically converting the time detected in the time circuit to an index file, It is preferable to have a data processing circuit.

The encoding unit 5 for compressing and encoding the video signal by merging the video signal stored in the data storage unit 2 and the index file stored in the data storage unit 2 and storing the compressed video signal in the data storage unit 2 When the index file is stored in the data storage unit 2 by the event generation unit 4, the index file is loaded in real time, and the index file is merged with the image and encoded in the image encoding process, A plurality of event occurrence times are displayed as separate indexes on the playback display bar of the video playback program.

Since the image encoding including the index file as described above can be implemented using a generalized image encoding program, a detailed description of the encoding process by the encoding program will be omitted.

In addition, the encoded image is compressed and stored as a moving picture standard such as MPEG-1 or MPEG-2, which is a format supported by MPEG (Moving Picture Experts Group, MPEG). However, It is desirable to compress and store the data in MPEG-4 capable of realizing video and audio. However, since it is technically limited to perform sufficient hardware performance to reproduce multimedia data compressed and stored in MPEG-4, I will reveal. In addition, since the storage date and time are stored separately, images can be retrieved using the date and time.

Hereinafter, the operation of the CCTV system having the event storage function according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, the camera of the CCTV system having the event storing function of the present invention is installed inside the apartment common entrance so as to photograph the common entrance door D installed so as to be able to open and close automatically.

The coil 301 constituting the sensing sensor unit 3 of the CCTV system having the event storing function of the present invention is installed inside the door frame of the common entrance and the magnet 302 constituting the sensing sensor unit 3 When the door D is opened, the magnet 302 installed in the door D moves together with the door D so that the coil 301 installed in the door frame is moved by the movement of the magnet 302 The induced current 301 is generated and the induced current value changes. The controller senses this change and provides the detected signal to the event generator 4 whenever the door D of the common entrance is opened.

The event generation unit 4 of the CCTV system having the event storage function of the present invention converts the generation time of the detection signal provided by the detection sensor unit 3 into an index file and stores the index file in the data storage unit 2.

Meanwhile, the encoding unit 5 for encoding an image to compress and store the image captured by the camera 1, in the course of encoding in order to compress and store the image in real time, Is stored and stored in the data storage unit 2, it is loaded in real time and merged with an image being encoded in real time, and the encoded image is sorted by date and stored in the data storage unit 2.

Therefore, when an image is reproduced using a desktop computer, a notebook computer, or the like equipped with a video reproducing program capable of loading and reproducing an image stored in the data storage unit 2 as shown in FIG. 3, P, a plurality of event occurrence times are separately displayed in an index (I) in the playback display bar B separately from the total playback time of the images.

Therefore, the user can select and reproduce only the time when a specific event occurs, irrespective of the total playback time of the stored image. Therefore, when the example of FIG. 2 is described, The time required for searching and identifying at the time of occurrence is greatly shortened.

As an example, the total number of times of occurrence of the event that the door is opened and the inside / outside of the door is opened from the entrance door (D) of the apartment common entrance having the total reproduction time of 24 hours is 100 times, When the time is calculated as 10 seconds, it takes only about 17 minutes to select and reproduce 100 times of events. As a result, compared with the total reproduction time of the entire image, It is possible to identify and search.

The above description is based on the application of the CCTV system having the event storing function of the present invention to the entrance door of the apartment common entrance. It should be understood that the present invention is not limited thereto and that the present invention is not limited thereto It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

1: camera 2: data storage unit
3: detection sensor unit 4: event generation unit
5: encoding section

Claims (2)

A camera (1) for photographing a subject and outputting the video signal;
A data storage unit 2 for storing video signals output from the camera 1;
A sensing sensor unit 3 for sensing the movement of a specific object;
An event generation unit 4 for converting the generation time of the detection signal provided from the detection sensor unit 3 into an index file that can be attached to the image photographed by the camera 1 and storing the converted index file in the data storage unit 2, ;
An encoding unit 5 for compressing and encoding the video signal by merging the video signal stored in the data storage unit 2 and the index file stored in the data storage unit 2 and storing the compressed video signal in the data storage unit 2, Wherein the CCTV system has an event storage function.
The method according to claim 1,
The detection sensor unit 3 includes a coil 301 for generating an induction current;
And a magnet (302) for changing the magnetic field of the coil to induce an induced current in the coil.

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