With the rapid development of the financial industry, banking services have surpassed the traditional service concept. ATM ATMs have been popularized throughout the country. It has brought us many conveniences and has become an inseparable assistant in our lives. In the daily life of the people.
Interpretation of the Advantages of ATM Intelligent Monitoring Technology
First, small size and low power consumption
Since most ATM machines are exposed to the outside world and are unattended, the design of the ATM machine is required to be riot-proof and non-transportable. It is also required that the ATMDVR has these characteristics. There are currently two approaches: one is placed outside the ATM machine, using a separately reinforced chassis, and the other is to place the ATMDVR directly in the ATM. Because the first method ATMDVR requires a reinforced chassis, and must be bundled with the ATM machine, the installation work of the DVR is greatly difficult, and the security is difficult to guarantee. So we recommend the second method. However, many ATM machines are not designed to leave a lot of space for the DVR. The DVR has to be slimmed down, taking up very little space in the ATM machine. The ATM machine generally adopts a sealed structure, and the heat inside the machine is not well dissipated during operation, resulting in a high ambient temperature of the ATMDVR, which puts higher requirements for the long-term stable operation of the ATMDVR in a harsh external environment.
In order to solve this problem, when selecting components, it is necessary to select a stable high operating temperature and low power consumption. At the same time, it is necessary to do an internal thermal cycle design to reduce the heat dissipated during the operation of the large-capacity hard disk inside the ATMDVR. In addition, some manufacturers have adopted the hard disk hibernation technology very well, that is, when there is no video recording, the hard disk can be put into a sleep state, the power consumption of the hard disk is minimized, and the heat emitted by the hard disk is reduced.
Second, save long-term video data
Since ATM machines require 24 hours of service and are unattended, ATMDVR is required to work stably for 24 hours. At the same time, banks generally require video data to be stored for one to three months or even six months. In order to realize this function, it may be considered to increase the capacity of the hard disk. Increasing the capacity of a single hard disk increases the capital investment. The increase of the number of hard disks is not only limited by the size of the ATMDVR, but also requires an increase in input, and also increases the power consumption of the ATMDVR, affecting the ATMDVR. Stability.
At present, the more practical and effective method is to reduce the storage space of effective video data. Under the premise of satisfying the image sharpness requirement, by increasing the compression ratio of the image, the capacity of the recorded data can be reduced. This requires a good compression algorithm. Like many manufacturers, the H.264 standard compression algorithm is used, which improves the compression ratio by about 30% compared with the traditional MPEG-4. Under the premise of ensuring effective video data, reducing the useless video data can also reduce the capacity of video data. The current method is to use the alarm trigger recording or motion detection to trigger the recording. The use of motion detection triggers reduces the input of infrared alarms, etc., but it is greatly affected by the environment, and it is prone to false alarms or false negatives. In order to see the whole operation process afterwards, each recording needs to be configured with flexible pre-recording and time-lapse recording, so that the process of approaching and leaving the character can be recorded, and the pre-recording time and recording delay time can be set according to user needs.
Third, accurate motion detection and video signal loss detection
Due to the concealment requirements of ATM monitoring, the ATM monitoring system generally uses a pinhole camera at the main port and the cash exit port, and for the convenience of people, the ATM machine is generally installed in a place where there are many moving objects, and the light intensity changes during the day and night. And so on, it is easy to generate false positives and false negatives in motion detection.
Under the premise of improving the quality of the pinhole camera, how does ATMDVR itself provide a good detection mechanism? If you simply reduce the sensitivity, it will lead to false negatives; if you only increase the sensitivity, it may lead to false positives.
Some manufacturers here use the noise reduction processing technology, that is, we collect the original signal through the algorithm to reduce the interference factors generated by the environment, and then carry out the motion detection, which is more accurate. In addition, some manufacturers are exploring to enable ATMDVR to achieve adaptive external environment adjustment sensitivity, which can better reduce false positives and false negatives. When a certain camera is not connected to the camera, or the video cable is damaged, the video signal is lost. The recorder can detect it in the first time and process it according to the preset method in time. The local alarm is uploaded to the alarm monitoring center through the network. The center analyzes and further processes.
Fourth, partial occlusion technology
Due to the need to protect the user's password, ATMDVR requires that the password keyboard and the user's password information are never visible in the recording screen. In order to achieve this function, some avoid the password keyboard when installing the camera, and some do occlusion processing during playback. We think that the better way is to remove the part of the picture that needs to be occluded before the image compression coding. As long as you can flexibly set part of the area that needs to be occluded, you can remove the image part of the PIN pad at the front end. No matter whether it is local preview or video playback, it will not leak the user's confidential information, and it will never be recoverable, completely eliminating the internals. The possibility of committing a crime.
Five, two-way synchronous playback and video data clip backup
Due to the correlation of several video recordings, local playback requires dual playback. The two-way playback is based on the time of the main port or the video file, the cash outlet channel or the cash inlet, the screen appears on the screen at the same time, and the two-way playback and single-channel playback are flexibly switched through the panel keys. How to ensure the synchronization of the two-way playback? The general approach is to ensure the time synchronization at the beginning. During the playback process, the two screens are independent. As long as the speed of the two channels is inconsistent, or the time of the video recording data changes, the two-way playback will be out of sync. A good method is to check the absolute time scale in the compressed code stream in real time (the time when recording the code). When there is a jump, only the one with the small time mark is played, and the time on the playback screen is absolutely the same, so that the whole can be done. Fully synchronized during playback.
During local playback, multiple time periods can be selected and backed up to the specified device. Nowadays, many backup devices use U disk, large-capacity IDE/USB hard disk, DE/USB burner, and 1394 interface device. Provide users with a convenient way to cut, a variety of flexible high-speed backup interface will greatly improve user satisfaction.
Sixth, card number superposition and blacklist confirmation function
This feature is a prominent feature of ATMDVR. Superimposing the corresponding card number, transaction type, transaction amount and other information directly on the screen, plus the character information on the video screen, it is more convenient to help confirm the after-the-fact tracing, and provide greater credibility in handling disputes with users. . The card number information transmitted by the ATM machine is received through the RS-232 serial port, or the card number information is obtained by capturing the network data packet and parsing the card number data. After the network function, the card number information can be transmitted to the monitoring center. The monitoring center can search the central database. If the card number appears in the blacklist, the center can take the action of forcing the card, interlocking 110, and starting the access control according to the nature of the event.
Seven, accurate alarm detection and powerful alarm linkage function
ATMDVR generally has 4 alarm input interfaces, 2 alarm output interfaces, and the interface mode uses switches. The sensitivity requirements for detecting alarm inputs are still relatively high. For example, when hitting an ATM machine, the duration of the vibration alarm may be only a few tens of milliseconds. If the sensitivity is not enough, a false alarm may occur.
ATMDVR supports powerful alarm linkage and common response. When video loss, partial occlusion, and signal alarm occur, it responds promptly and accurately. The alarm event can trigger the local alarm output, trigger the dialer, or transmit to the monitoring center through the network, and the monitoring center can handle the corresponding processing, such as starting the monitoring system access control system.
Eight, powerful network functions
After entering the network era, network functions play a very important role in ATMDVR. With the network, browsing images through the network, playing back and backing up video data through the network, controlling alarms through the network, etc., almost every local function can be realized through the network. After the monitoring center, the network function has been further strengthened. For example, some ATMMDVR captures a static image while transmitting the card number, and uploads it to the monitoring center through the network, which greatly enriches the field information in the database. .
In addition, the most prominent network function of ATMDVR is two-way voice intercom. The user encounters a difficult problem in the process of using the ATM machine, and conveniently presses the intercom button to initiate a voice intercom, and seeks help from the monitoring center, thereby improving user satisfaction. The monitoring center can also actively call the scene when certain abnormalities are found. Therefore, the network function of ATMDVR has greatly expanded and enriched the basic functions of ATMDVR.
Demand is constantly changing, and the requirements for ATMDVR will be constantly updated. DVR manufacturers will continue to apply more advanced technologies (such as biometrics) to their products to continuously improve the functions of ATMDVR.
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