KR20000021147A - Search method using user id number in monitoring system - Google Patents

Abstract

PURPOSE: A searching method is provided to rapidly search an interval desired to be identified with using a customer card number in a reproduction or a search by encoding and recording the customer card number on a control track of a cassette recorder. CONSTITUTION: A customer card number is coded in a certain format(308). The coded customer card number is recorded on a control track by using a difference of a duty ratio between the bis pulse and a control pulse used in a video cassette recorder(310). The customer card number desired for a search is inputted from a computer(312). The inputted customer card number is compared by decording the bis pulse and the control pulse read from a video cassette tape(318). A reproduction is started from an interval where the inputted customer card number is identical to the decoded signal(324)

Description

Method for searching using card number in a securty system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a search method using a customer card number in a surveillance system. In particular, a user wants to find a surveillance system for recording an unmanned surveillance camera image in a bank or the like using a digital video cassette recorder (hereinafter referred to as DVCR). The present invention relates to a search method using a customer card number in a surveillance system that allows a location to be easily searched using a customer card number.

In general, a surveillance system is a device installed for security in a place where surveillance such as a bank is required. The surveillance system monitors a place using an unmanned surveillance camera and stores an image monitored by the surveillance camera through a predetermined recording means. As a useful equipment that can be identified later, it is widely used and used.

As shown in FIG. 1, the surveillance system includes a plurality of cameras 100 for capturing an environment in place, a DVCR 300 for storing and reading images captured from the camera 100, and a camera ( Computer 200 for controlling the overall operation of the surveillance system by controlling the DVCR 300 based on the video signal applied from the 100 and the cash machine 400 that the user can withdraw cash and checks using a customer card. ) And the like.

In this configuration, the camera 100 outputs a captured image signal by photographing a subject in each field environment, and the computer 200 is a main controller for controlling the overall operation of the surveillance system. The video signal is processed into a digital video signal, the DVCR 300 is controlled and recorded, the recorded video signal is displayed on the monitor of the computer 200, and checked, and an unmanned service device such as an ATM 400 is controlled. .

The digital data bit stream (DVHS) of the DVCR 300 is a video and audio compressed in the form of a 20-bit sync signal, a 30-bit identification signal, and a 770-bit moving picture expert group (MPEG). One data block includes 125 data blocks, 80 sync bits with internal parity signals, and 11 sync blocks with external parity signals instead of the 770-bit video and audio signals. The track signal is constructed.

In addition, a predetermined block synchronization signal and a 6000-bit preamble signal are added to the front of the aforementioned 136 sync blocks, and a 5000-bit post-amble signal is added to the rear.

On the other hand, at the time of recording, the one-digit digital data bit stream described above is recorded in one track in synchronization with the phase of the head drum based on the block synchronizing signal, and the digital data bit stream at this time is not analog data but analog data. It is handled and recorded using the deck mechanism of the conventional analog video cassette recorder by accurately synchronizing the above-described block synchronizing signal with the phase of the head drum.

On the other hand, if you briefly look at the configuration of the DVCR 300, the microcomputer 310 for controlling the overall operation of the DVCR, a deck unit for recording and playing the digital data bit stream applied under the control of the microcomputer 310 ( 320, the sub-microcom 330 and the sub-microcom 330 which control the encoding and decoding of the digital video signal applied from the computer 200 under the control of the microcomputer 310 and perform the communication control. A digital signal processing unit 340 for encoding a digital signal into a digital bit stream, decoding and outputting a digital bit stream applied from the deck unit 320, and a universal asynchronous transceiver (UART) for interfacing with the computer 200. and an interface unit 350 using a receiver / transmitter.

On the other hand, in the monitoring system having such a configuration, when searching for a desired section, there is a problem in that a user needs to find a desired section while watching a screen played by using a fast playback function. Therefore, it took too much time for the user to obtain a single image, and there was also a problem that it was not easy to find a customer who used a particular card.

On the other hand, a control signal in the video cassette recorder (Control Pulse) is recorded at the bottom of the video tape, i.e., the control track (0.75 mm) and recorded and detected by the control head as a bipolar pulse of frequency 30 Hz.

When recording, the control signal divides the vertical sync signal of the video signal into 1/2, and then records it on the control track. During playback, the control signal is detected and compared with the reference signal 30 Hz to phase the Capstan Motor. It is supposed to be controlled.

That is, during recording, the control signal in the form of a square wave extracted from the vertical synchronizing signal is accurately recorded on the video tape once per cylinder rotation, that is, once every 1/30 second, and the control recorded by the control head during playback. The signal is read to control the timing of the capstan motor and rotating head cylinder that drives the videotape.

On the other hand, the VHS Index Search System (VISS) used for recording is a VHS Uniform Index (INDEX) signal, which is recorded on tape as an index signal based on converting a waveform of a normal control pulse at the beginning of recording. When recording, as a vis signal, 62 control pulses with a high level and a low level of about 3 to 7 are recorded, and a normal control pulse with a high level and a low level of 7 to 3 is described after the bis signal. Is recorded.

The present invention encodes and records a customer card number applied from the cash machine 400 in a predetermined format when using the cash machine 400 using two control signals having different duty as described above, thereby reproducing the customer card number as a keyword during reproduction. In order to provide a method for quickly searching for an image of a customer using a desired section, that is, a corresponding customer card number.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to use a control signal for a customer card number applied from an ATM machine when recording a monitored video in a surveillance system using a DVCR as a recording means. The present invention provides a search method using a customer card number in a surveillance system in which a video is encoded and recorded together, and the user can search more quickly by using a hatched and recorded customer card number when searching a surveillance image.

1 is a block diagram of a monitoring system employed in accordance with the present invention.

2A is a waveform diagram illustrating a control pulse and a bis pulse employed in accordance with the present invention.

2b is a data format for customer card information recorded according to the present invention.

3 is a flow chart illustrating a search process in accordance with the present invention.

<Explanation of symbols for main parts of the drawings>

100: camera 200: computer

300: DVCR 310: Microcomputer

320: deck portion 330: sub-microcom

340: digital signal processing unit 350: interface unit

400: ATM

In the surveillance method using the customer card number in the surveillance system according to the present invention, a surveillance system having a computer for recording and reproducing the video signal monitored by the surveillance camera by using a digital video cassette recorder and centrally controlling an ATM or the like, respectively. A method of searching recorded video in a video, comprising: encoding an authorized customer card number into a predetermined format when a customer card number is applied from the cash dispenser when recording a surveillance video signal; and video surveillance video from the surveillance camera. A recording process including recording on the track and simultaneously recording the encoded customer card number on the control track using a difference in the duty ratio of the control pulse and the bis pulse used in the video cassette recorder, and the recorded surveillance video signal. I want to search from the computer upon confirmation Is a step of receiving a customer card number, decoding a control pulse and a vis pulse read out by playing a video tape, and comparing the received customer card number with a decoded signal; It characterized in that it comprises a playback process comprising the step of starting to play from.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A is a waveform diagram showing a control pulse and a bis pulse used in the present invention. As shown in the figure, a general control pulse has a high level section of 60 ± 5%, and a bis pulse is a high level section. It takes up 27.5 ± 2.5% and uses data "0" and data "1" respectively.

Figure 2b is a data format for the customer card number according to the present invention, the header area is composed of "11111111" of 8 bits, for example, the customer card number, for example, 13 digits each of 4 bits to configure a total of 52 bits in total, It consists of 60 bits.

Next, a search process according to the present invention will be described in detail with reference to the accompanying flowchart of FIG. 3.

First, FIG. 3 illustrates a process of recording customer card number data and a search and playback process using customer card number data.

First, when the recording mode is switched (step 300), each surveillance image applied from the camera 100 is converted into a digital image signal (for example, a still image screen for each frame) by the computer 200, so that predetermined control for recording is performed. Along with the signal is applied to DVCR 300 (step 302).

At this time, when the cash machine 400 is used and the customer card number is applied to the computer 200, the computer 200 uses the DVCR 300 as a predetermined control signal for recording the customer card number authorized from the cash machine 400. ) Is applied.

Then, in the DVCR 300, the digital video signal applied through the interface unit 350 under the control of the sub-microcom 330 is encoded into the digital bit stream described above by the digital signal processing unit 340, and thus the deck unit 320. The deck unit 320 records the digital bit stream applied under the control of the microcomputer 310 to the video track of the video cassette tape (step 304).

In addition, when the customer card number is applied from the computer 200 (step 306), the microcomputer 320 encodes the authorized customer card number in the data format of FIG. 2B described above (step 308). The control head writes to the control track of the video cassette tape (step 310).

On the other hand, if the customer card number is recorded together with the video monitored on the video cassette tape through the above-described recording process, the user can quickly search for a desired section using the customer card number.

On the other hand, commands that can be input by the keyboard of the computer 200 in order to control the operation of the DVCR 300 are general power on / off key, PLAY key, stop ( STOP key, PAUSE key, fast forward (FF) key, rewind (REW) key, REC key, EJECT key, SEARCH key, SPEED key, etc. The keys may be selected by using a predetermined key operation assigned to the keyboard, by clicking an icon on a predetermined program controlling the DVCR 300, or by using a pull-down menu.

Therefore, in order to search for the surveillance video recorded based on the above-described recording process, first, after selecting the search key, the user uses the keyboard of the computer 200 to search for the customer card number (for example, 13 digits). ).

At this time, the control signals are transmitted to the DVCR 300 based on the serial communication of the computer 200, and the interface unit 350 of the DVCR 300 receives the control signals applied based on the serial communication. Interface is received and input (step 312).

Next, the microcomputer 310 of the DVCR 300 receives the above-mentioned customer card number and then controls the deck unit 310 to search for a recorded image corresponding to the input customer card number. After rewinding, the unit is switched to the fast forward mode to fast forward the video tape in all directions (step 314) and is read through the control head (step 316) to compare the applied customer card number with the entered customer card number ( Step 318).

At this time, if the customer card number read out through the control head and the input customer card number do not match, it is determined whether it is the end of the video cassette tape (step 320), and if not, the process returns to step 318 as described above. Judges whether the read customer card number and the entered customer card number match, and if the end of the video cassette tape, i.e., if the read customer card number does not match the entered customer card number even after fast forwarding ends, there is no corresponding video. Is displayed (step 322), and the search process ends.

On the contrary, when the customer card number read out through the control head and the input customer card number in step 318 are identical to each other, the microcomputer 310 controls the deck unit 320 to stop fast forwarding and play back. The control mode is switched to reproduce the surveillance video recorded corresponding to the input customer card number, that is, the spot screen where the cash dispenser 400 is used as the customer card number (step 324).

Then, the read surveillance image desired by the user is transmitted to the computer 200 through the digital signal processor 340 and the interface unit 350, and the computer 200 monitors the digital video signal applied from the DVCR 300. After the display, the user can quickly check the desired surveillance image through the monitor of the computer 200.

On the other hand, the customer card number displays the customer card number along with the fast playback screen when the DVCR 300 performs the fast playback mode, so that the user can select a scene to be monitored while checking the screen being played through the fast playback mode. It can be seen that the modification can be easily carried out.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, by recording the customer card number of the customer who uses the ATM machine in the surveillance system used in the surveillance system used in the place where surveillance such as a bank or the like is encoded and recorded on the control track of the video cassette recorder. During the playback or search, the customer card number can be used to quickly search for a desired section.

Claims (1)

A method of searching recorded video in a surveillance system having a computer for recording and playing back video signals monitored from a surveillance camera using a digital video cassette recorder and centrally controlling an ATM and the like, respectively. Encoding the authorized customer card number in a predetermined format when the customer card number is authorized from the atm machine when the surveillance video signal is recorded; Recording the monitored image from the surveillance camera onto the video track of the videotape and simultaneously recording the encoded customer card number on the control track using the difference between the duty ratio of the control pulse and the bis pulse used in the video cassette recorder. A recording process comprising the steps; Receiving a customer card number to be searched from the computer when checking the recorded surveillance video signal; Decoding a control pulse and a vis pulse read out by playing the video cassette tape and comparing the received customer card number with the received customer card number; A search method using a customer card number in a monitoring system comprising a playback process comprising the step of starting playback from a section where the decoded signal and the input customer card number coincide.