KR20040016031A - Method for searching a data file in digital video recorder for monitoring - Google Patents

Abstract

PURPOSE: A method for searching for data files in a digital video recorder for monitoring is provided to more promptly search for data files by managing starting addresses, dates, channels of data as an additional information file. CONSTITUTION: Each data file is recorded in a 'Data 1' subdirectory included in a 'DVR(Digital Video Recorder)' directory. File management information to each data file is recorded in an information file in the 'DVR' directory. The file management information includes the number of data files, a data file name, a data file start address, a data file event type and a data file channel number of each data file.

Description

Method for searching a data file in digital video recorder for monitoring}

According to the present invention, when an occurrence of an event is detected on the basis of a change amount of video signals photographed from a plurality of surveillance cameras or a detection signal output from a plurality of surveillance sensors, the event detection image is stored in a hard disk ( A data file retrieval method in a digital video recorder for surveillance that records and stores a data file as a data file in a storage such as an HDD.

Recently, a surveillance digital video recorder (DVR: Digital Video Recorder) capable of simultaneously monitoring various regions has been developed and commercialized. The surveillance digital video recorder (DVR) has a large amount of video or audio data. Storage such as a hard disk (HDD) capable of recording and storing, and a disc driver for recording and storing video or audio data on an optical disc such as a CD-RW, etc. It is provided.

Meanwhile, as shown in FIG. 1, the general surveillance digital video recorder (DVR) is connected to and connected to a plurality of surveillance cameras 10 ₁ to 10 _n respectively distributed in various regions requiring surveillance. In addition, it may be connected to various peripheral devices such as a plurality of monitoring sensors 20 ₁ to 20 _k .

In addition, the surveillance digital video recorder (DVR) may be connected to a personal computer 500 of a system operator located at a remote location through the network 400. For example, the surveillance digital video recorder (DVR) may be connected. ) Monitors the amount of change in the video signal photographed from a plurality of surveillance cameras, and if the amount of change in the video signal exceeds a preset reference change amount, determines that an event such as an invasion of a third party has been detected. do.

When an event is detected through the above process, as shown in FIG. 2, recording of the video signal captured by the surveillance camera installed in the corresponding area is started on the hard disk HDD (S10).

In addition, when the video signal is recorded (S20), when the event is released or when the recording size of the video signal recorded with temporal continuity on the hard disk, that is, the event detection video data exceeds 40 MBytes, for example. The event detection video data is partitioned into one data file, and a file name for the data file is generated and recorded and managed (S30), wherein the file name is associated with a recording date and time. Recording is managed by a predetermined file name set in advance.

Thus, the system operator can check the surveillance video transmitted from the surveillance digital video recorder 300 in real time, and also search and confirm the data files recorded on the hard disk, so that the event situation and the intruder previously occurred. Can be reconfirmed.

However, in a general surveillance digital video recorder (DVR), in order to search for and display corresponding data files according to file search conditions selected by the system operator, the recording date and time of each data file, channel information, and the like. Since the same file management information must be read and checked in the corresponding data file, a problem that takes a long time for a data file search operation occurs.

Therefore, the present invention was created to solve the above problems, and records the file management information for each data file recorded in storage such as a hard disk as a separate information file, and also requests a data file search request. Provides a data file retrieval method in a surveillance digital video recorder for quickly retrieving data files that match a file retrieval condition selected by a user by referring to file management information recorded in the information file There is a purpose.

1 is a view illustrating a state in which a general surveillance digital video recorder (DVR) is connected to a plurality of surveillance cameras, sensors, and personal computers of an operator.

2 schematically shows a data file recording process in a general surveillance digital video recorder,

3 illustrates a configuration of a surveillance digital video recorder to which a data file retrieval method according to the present invention is applied;

Figure 4 shows an embodiment of the file structure in the surveillance digital video recorder according to the present invention,

5A and 5B show an operation flowchart of a data file retrieval method in a surveillance digital video recorder according to the present invention;

6 illustrates an embodiment of a data file search list screen output and displayed by the data file search method according to the present invention.

※ Explanation of code for main part of drawing

10 ₁ ~10 _n: camera for monitoring 20 ₁ ~20 _k: monitoring sensor

30: device interface 31: DVR system

32: network interface 33: hard disk

34: disk driver 35: memory

300: surveillance digital video recorder 400: network

500: personal computer

In the data file retrieval method in the surveillance digital video recorder according to the present invention for achieving the above object, the file search condition for screening and searching the data files recorded with the video data of the surveillance camera, the external connection device and Receiving and storing through the interface of step 1; And outputting and displaying, in list form, the file names of the data files meeting the file search condition with reference to the file management information recorded and managed separately from the data file.

Hereinafter, a preferred embodiment of a data file retrieval method in a digital video recorder for surveillance according to the present invention will be described in detail with reference to the accompanying drawings.

3 illustrates a configuration of a surveillance digital video recorder to which the data file retrieval method according to the present invention is applied. As described above with reference to FIG. The monitoring cameras 10 ₁ to 10 _n , the plurality of monitoring sensors 20 ₁ to 20 _k , and the network 400 may be connected and connected to the personal computer 500 of the system operator.

In addition, the surveillance digital video recorder 300 includes a device interface 30 for connecting and connecting the surveillance camera and sensors, a DVR for performing event detection video data recording operation and data file search operation. A system 31, a network interface 32 for connecting and connecting with a personal computer of a system operator via the network, and a hard disk for recording and storing event detection video data as a data file by operation control of the DVR system ( 33), a disk driver 34 for backing up data files stored in the hard disk to an optical disk such as a CD-RW, and a memory 35 for storing information necessary for controlling the operation of the DVR system. .

On the other hand, the DVR system 31 monitors the amount of change in the video signal photographed from the plurality of monitoring cameras connected or connected as described above, or the detection signal output from the plurality of monitoring sensors to monitor the amount of change in the video signal. When a preset reference change amount is exceeded or when a high level detection signal is output from the monitoring sensor, it is determined that an event such as an invasion of a third party is detected.

The video signal captured by the surveillance camera installed in the region is recorded and stored as a data file of the event detection image on a hard disk provided in the device. The file management information for the recording is managed as a separate information file.

For example, in the DVR system 31, as shown in FIG. 4, each data file (* .dat) is recorded in a 'DATA1' subdirectory included under the 'DVR' directory, File management information for each data file is recorded and stored in an information file (* .Info) in the 'DVR' directory. The file management information recorded in the information file includes the number information for the data files. (number of data files), a file name of each data file, and a data file start address at which each data file is recorded may be recorded.

The file management information may include an event type information (data file even type) and a channel number information (data file channel number) for each data file, and the event type information may include a corresponding data file. The event of recording the data is for identifying a light corresponding to a motion event according to a video change of the surveillance camera. The channel number information includes a surveillance camera corresponding to the data file. It is intended to be identifiable.

On the other hand, in the DVR system 31, when a data file retrieval operation is requested from the system operator, with reference to the file management information recorded in the information file, data files that meet the file retrieval conditions specified by the system operator are retrieved. The search is quickly displayed, which will be described in detail below.

5A and 5B show an operation flowchart of a data file retrieval method in the digital video recorder for monitoring according to the present invention. In the DVR system 31, as described above, the normal event monitoring operation is performed. In this case, when the occurrence of the event is detected and confirmed (S50), a series of data records for recording the event detection video data photographed from the surveillance camera installed in the region where the event has occurred is recorded on the hard disk 33. The operation is performed (S51).

On the other hand, during the data recording operation as described above, when the event detection is released (S52), or when the video data recorded with the temporal continuity on the hard disk is a predetermined recording size, for example, 40MBytes (S53), the video data continuously recorded up to that time is divided into one data file (* .dat), and a predetermined file name related to the date and time of occurrence of an event is generated and recorded in the 'DATA1' subdirectory. It is managed (S54).

In the DVR system 31, file management information for the data file (* .dat), for example, data file name, recording start address and event type information, and channel number information, are stored in the 'DVR' directory. The information is recorded in the information file (* .Info) (S55).

While performing the normal event monitoring operation again (S56), when a 'data file search' is requested from the system operator (S57), the DVR system 31, as shown in Figure 6, the user Creates and outputs a user menu image for selecting and inputting a desired data file search condition.

Accordingly, the system operator can select and input a desired data file search condition. For example, a date & time of occurrence of an event can be set as' 2002.5.15.22:00-2002,5.18. 20:00 ', the event type (Motion Detection), and the channel number (Channel Number) to select and specify as' CH-13', the DVR system 31, It receives (S58), and stores it as the file search condition information in the memory 35.

Then, the file management information recorded in the information file (* .Info) of the 'DVR' directory is searched, and file names for data files that match the file search conditions are shown in FIG. List) (S59).

Subsequently, when the system operator selects and specifies any one data file name displayed on the list (S60), the file management information recorded in the information file (* .Info) of the 'DVR' directory is searched for, The recording start address associated with the data file name is confirmed (S61).

Then, by searching the recording position corresponding to the confirmed recording start address, a series of data file reproducing operations for reading out and reproducing the corresponding data file are performed (S62), so that the system operator matches the search condition selected by the user. You will be able to search and verify the data files quickly.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

In the data file retrieval method of the digital video recorder for surveillance according to the present invention configured and configured as described above, the video data of the surveillance camera installed in the event occurrence area is recorded and stored as a data file in a storage such as a hard disk, and the respective data is stored. File management information such as a file name, a recording start address, a recording date and time, and channel information about the file are recorded and managed as a separate information file, so that the file management information recorded in the information file is stored when the data file search request is made. For reference, it is a very useful invention to be able to search the data files that match the file search conditions selected by the user more quickly.

Claims (4)

Receiving and storing a file search condition for selectively searching for data files in which video data of a surveillance camera is recorded through an interface with an external connection device; And And a step of outputting and displaying the file names of the data files meeting the file search condition in a list form with reference to the file management information recorded and managed separately from the data file. How to retrieve data files from video recorder. The method of claim 1, And searching and reproducing and outputting any one data file selected and specified by the list with reference to the file management information. The method of claim 1, The file management information includes at least one of a file name, a recording start address, an event type, and channel number information for each data file. The method of claim 1, And the file management information is recorded in an information file of an upper directory different from the directory in which the data files are included and recorded.