How to choose a 4-channel DVR? Description, settings, reviews of the best models

Application of modern CCTV systemsallows you to ensure the safety of the car and monitor the situation around the machine while driving. The most effective tracking system is a 4-channel video recorder. If an accident occurs, then with the help of this device it is possible to reconstruct events by fragments and at the same time to show the general picture of the incident to the traffic police inspector. This will prove your innocence in the event that your guilt did not really exist.

4-channel DVRs in Russia are quite common. Their installation is difficult, but for a long time. In addition, a similar system is always used, even when the car is parked.

What is a 4-channel video recorder?

Most drivers want to be aware of,what happens around the car during its movement. For them, they developed similar car DVRs for 4 cameras. Each camera has a small viewing angle, but this is enough to fix what is happening around the machine and display it on the display.

The kit includes 4 separate cameras,which connect to the main unit. The screen displays images either from each camera separately, or simultaneously from all cameras at once. For this, the function "quadrator" is provided. If the monitor is not available (and there are such models too), you can watch the video on your phone, laptop, computer, TV. If desired, the data can be recorded on a medium and viewed on any electronic device. Modern recorders support SDHC, microSD, USB memory cards.

Purpose

You can highlight the main functions that the four-channel DVR performs:

1. Fixing the situation on the road with the help of four cameras.
2. 24-hour observation of the car with the help of mobile Internet or Wi-Fi.

In the latter case, the recorder should be connected to a Wi-Fi network or have a slot for a sim card to connect to the mobile Internet.

Features of operation

When choosing a 4-channel DVRIt is necessary to take into account the type of machine where the device will be operated. Such a solution is appropriate not only for cars, but also for special transport: collectors, police cars, ambulances, buses for transporting children, trolleybuses, etc. The operating conditions in a car and public transport will be different: the level of noise, vibration, temperature differences.

The use of DVRs in trolleybuses andbuses are rare. In addition, not always such devices are limited to four cameras. Some models have additional video and audio inputs, which allows you to connect more cameras to increase the range of considered areas of the car. For a conventional car, the most standard model with four cameras is suitable. However, it must meet the criteria that are described below.

Functional

Recorders for video surveillance have a set offunctions that can be useful in certain situations. For example, most modern models have GPS modules, G-sensors (also known as impact sensors). All these elements allow you to more accurately determine the location of the occurrence of an accident and the moment of collision. Also, at the moment of the vehicle's impact, the registrar "feels" the collision and saves the video fragment on which the road accident is imprinted. The image itself will contain the coordinates, speed, date and time, with which the driver moved.

Thanks to the image from all usedcameras can accurately represent the picture of the incident taking into account the smallest details. All this will allow to accurately identify the guilty participant in the accident and remove all suspicions from himself. Many 4-channel DVRs have a Wi-Fi module, through which you can monitor the car, its movement or parking in the parking lot. Therefore, when selecting, pay attention to the presence in the recorder of the wireless data transmission module.

Note that modern cameras arecompact enough, so they are easily fixed in the machine. At the same time, they are practically invisible, so they do not create any obstacles for the driver. As for the wires, they hide in the lining of the cabin and do not spoil the interior at all.

Recording format

All four cameras used are removedsimultaneously - this applies to all models. However, some DVRs can not boast of high quality shooting. The quality depends on the cameras used, the processor of the device. Some cheap recorders do not know how to shoot video in HD. On other models, only one or two cameras record HD video, and more expensive modern devices generally record FullHD video from all four cameras.

This is one of the most important moments when choosing,which should be taken into account first. The fact is that at high resolution a greater chance to capture the numbers of cars that surround the car. This will allow in case of an accident to identify the number of the offender and the culprit of the incident.

Criterias of choice

When choosing a video recorder for a car, the buyer should first of all pay attention to the following parameters when selecting:

1. Quality of shooting.
2. CPU.
3. Functionality: G-sensor, GPS-module and Wi-Fi.
4. Battery capacity.
5. Optical characteristics of the chambers.

CPU performance is important, because. depends on it the performance of the camera itself and the quality of the video shooting. Some models shoot video jerks, which indicates a weak CPU. Most modern 4-channel DVRs record video at a speed of 30 FPS (frames per second). However, using a good processor allows you to record video at a speed of 60 frames per second. At this speed, the video will go smoothly, without jerking. Given that the recorder immediately processes 4 streams, its processor should be quite powerful.

As for the camera modules, for them the criterion such as the viewing angle and the ability to record video in HD or FullHD format is important. If the viewing angle is 140-160 degrees, then this is normal.

You also need to choose the carDVR for 4 cameras with a large battery capacity. So the device will be able to work long while the car is in the parking lot during the absence of power from the vehicle's on-board network.

G-sensor (impact sensor) should also be. Thanks to him, the device will save the video, which was received shortly before the accident and during the event itself.

Well, the last is the appearance of the 4-channelDVR. When buying a new device in the store, you should pay attention to the abrasions or irregularities on the case, which may indicate a low quality of the device.

Reviews

The above selection criteria can be supplementedone more. We are talking about reviews. On the Internet, there are many sites on which you can read reviews about the model that you have in mind. Be sure to read them, because quite often even cool recorders with excellent technical characteristics break during two to three months of operation. In no event should you buy a 4-channel AHD DVR, if it is badly spoken by users.

Conclusion

Today there are a lot of differentDVRs from well-known brands and from companies you have not heard about before. Therefore, the choice is complex. Use the above tips, and you can definitely buy a reliable and high-quality device.