Bank Monitor: Technical Advantages of ATM DVR

With the rapid development of the financial industry, banking services have surpassed the traditional service concept. ATM ATMs have continued to spread throughout the country. It has brought a lot of convenience to our lives and has become an inseparable assistant in our lives. It has been fully integrated. In the daily life of the people. ATM self-service bank is unattended and provides financial services 24 hours a day. The security of its related equipment and customer transaction process has always been one of the important tasks of the bank's security department.

Small size and low power consumption Because the ATM machine is mostly exposed outdoors and is unattended, the design of the ATM machine is required to be riot-proof and non-transportable. It also requires the A***VR to have these characteristics. At present, there are two general approaches: one is placed outside the ATM machine, and a separately reinforced chassis is used. The other is to place the A***VR directly inside the ATM. Because the first method A***VR requires a hardened chassis and must be bundled with the ATM machine, it is very difficult to install the DVR, and the security is difficult to ensure. So we propose to adopt the second method. However, many ATMs are not designed to leave a lot of space for DVRs. DVRs have to be thin and occupy a very small space in the ATM. The ATM machine generally adopts a sealed structure, and the heat inside the machine is not well distributed during work, resulting in a high ambient temperature of the A***VR, which gives the A***VR a long time stability in a harsh external environment. The work put forward higher requirements.

In order to solve this problem, when selecting components, it is necessary to select a stable operating temperature, low power consumption, and at the same time to do a good internal thermal cycle design to reduce the distribution of large-capacity hard drives inside A***VR. The heat. In addition, some manufacturers use the hard disk hibernation technology very well, that is, when there is no video recording, the hard disk can be put into a dormant state to minimize the power consumption of the hard disk and reduce the heat dissipated by the hard disk.

Preserving long-term video data Because ATM machines require 24-hour service and are unattended, A***VR is required to be able to work stably for 24 hours. At the same time, banks generally require that video data be saved for one to three months or even six months. To achieve this function, it may be considered to increase the capacity of the hard disk, increase the capacity of a single hard disk to increase the capital investment, increase the number of hard disks is not only limited by the size of A *** VR, but also need to increase investment, but also increase the A *** The power consumption of VR affects the stability of A***VR.

The current practical and effective method is to reduce the storage space for effective video data. Under the premise of satisfying the requirement of image clarity, increasing the compression ratio of the image can reduce the capacity of the video data. This requires the use of a very good compression algorithm, like many manufacturers choose H. The 264 standard compression algorithm improves the compression ratio by about 30% over the conventional MPEG-4. On the premise of ensuring effective video data, reducing useless video data can also reduce the capacity of video data. The current approach is to use alarm trigger recording or motion detection trigger recording. The use of motion detection triggers reduces the input of infrared alarms and the like, but is relatively affected by the environment, and is prone to false alarms or missing reports. In order to see the entire operation process afterwards, flexible video pre-recording and time-delay recording are required for each video recording. The process of character approaching and leaving can be recorded. Pre-recorded time and video delay time can be set according to user needs.

Precise motion detection and loss of video signal detection Due to the concealed requirements of ATM surveillance, ATM monitoring systems generally use pinhole cameras at the main port and the cash outlet. In order to facilitate people's use, ATMs are generally installed on moving objects. In places, changes in the intensity of light during the day and at night can easily cause false positives and false negatives in motion detection. In the premise of improving the quality of pinhole cameras, how does A***VR provide a good detection mechanism? If you simply reduce the sensitivity, it will lead to missed reports; if you just increase the sensitivity, it may lead to false positives.

Here some manufacturers use noise reduction technology, that is, we process the algorithm to collect the original signal, reduce the interference factors generated by the environment, and then move the detection, it is more accurate. In addition, some manufacturers are exploring the function of adapting the sensitivity of the external environment to A *** VR, which can better reduce false positives and false negatives. When a camera is not connected to a camera or the video cable is damaged due to video cable damage, etc., the recorder can be detected within the first time and processed in a timely manner according to pre-set methods, local alarm or uploaded to the alarm monitoring center via the network. Center analysis and further processing.

Partial occlusion technology Due to the need to protect the user's password, A***VR requires absolutely no password keyboard and user's password information to be visible in the recording screen. In order to realize this function, some of them 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 screen that needs to be blocked before the image compression coding. As long as the flexible settings need to be blocked in some areas, you can remove the image part of the password keyboard at the front end, whether it is local preview, or video playback will not leak the user's confidential information, and has never recovered, completely eliminate the internal The possibility of committing the crime.

Dual Simultaneous Playback and Video Clip Backup Because of the relevance of several video files, the local playback requires two-way playback. The dual-channel playback is based on the time of the main port or the video file. The channel of the cash-out port or the cash-in port is displayed on the screen at the same time. The dual-channel playback and single-channel playback are flexibly switched by the panel keys. How to ensure that the two-channel playback screen synchronization? The general practice is to ensure that the start time is synchronized. During the playback process, the two screens are independent. As long as the speed of the two channels is inconsistent, or the time of a certain video data session changes, two-way playback will not be synchronized; A good way is to check the absolute time stamp in the compressed code stream in real time (the time when the record is encoded). When there is a jump, only the time scale is played. This ensures that the time on the playback screen is absolutely consistent. The playback is completely synchronized.

Local playback can also select multiple time periods and back up to the specified device. Now U disk, high-capacity IDE/USB hard disk, DE/USB burner, and 1394 interface device are used for backup devices. To provide users with a convenient editing mode, a variety of flexible high-speed backup interface will greatly improve user satisfaction.

Card number overlay and blacklist confirmation function This function is a prominent feature of A***VR. Directly superimposed on the screen with the corresponding card number, transaction type, transaction amount and other information, plus the character information on the video screen, more convenient to help confirm post-mortem tracing, while providing greater credibility in the handling of disputes with users. . Through the RS-232 serial port to receive the card number information transmitted by the ATM machine, or by capturing the network data packet, the card number data is parsed to get the card number information. With 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 black list, the center can take actions such as forcibly swallowing the card, linking 110, and starting the access control according to the nature of the event.

Accurate alarm detection and powerful alarm linkage function A *** VR generally has 4 alarm input interfaces, 2 alarm output interfaces, and the interface mode uses multiple switches. The sensitivity requirements for detecting alarm inputs are still relatively high. For example, when the ATM is hit, the duration of the vibration alarm may be only tens of milliseconds. If the sensitivity is not enough, false alarms may be generated. A *** VR supports powerful alarm linkage and common response. When video loss, partial occlusion and signal alarm occur, it responds in time and accurately. The alarm event can trigger the local alarm output, trigger the dialer, and can also be transmitted to the monitoring center through the network, and the monitoring center can make corresponding processing, such as starting the access control system of the monitoring system.

After the powerful network function enters the network age, the network function plays a very important role in A***VR. With the network, browsing images through the Internet, playing back and backing up video data via the network, controlling alarms via the network, etc., almost every local function can be realized through the network. After having a monitoring center, the network function has been further strengthened. For example, some A***VRs capture a static screen image while transferring the card number, and upload it to the monitoring center through the network, which greatly enriches the central database. On-site information.

In addition, A***VR's most prominent network feature is two-way voice intercom. The user encounters difficult problems in using the ATM machine, and conveniently presses the intercom button to initiate voice intercom, seek help from the monitoring center, and improve user satisfaction. The monitoring center can also proactively speak to the site in the event of any abnormalities. Therefore, the network function of A***VR enables the basic functions of A***VR to be greatly expanded and enriched.

The requirements are constantly changing, and the requirements for A***VR will be constantly updated. DVR manufacturers will continue to apply more advanced technologies (such as biometrics, etc.) to their products to continuously improve A***VR. The function.