How to choose a DVR for the car
Among car owners, DVRs withevery day are becoming more popular, so they are now more likely to be seen in the car salon. This device will help to capture the picture of the accident and communication with the traffic police, which is an excellent material evidence in the proceedings and disputes with insurance companies and servicemen of traffic police, and allows you to prevent the case before trial. This article maximizes the useful information on how to choose a DVR for a car, describes the main characteristics and capabilities of modern models, their functions and types.
Types and device of car DVRs
If you are an auto owner and you have a question abouthow to choose a DVR, then the first thing you need to know is that they are multi-channel and stand-alone. Stand-alone devices are quick and easy to install into a car. They are attached to the bracket to the front or rear glass with a suction cup or double-sided adhesive tape. In fact, it's a small video camera that can record on its own, storing it on a memory card or on a hard drive. The main advantages of autonomous DVRs are minimal power consumption, excellent recording quality and optimal prices.
Multi-channel car DVRs,reviews about which the most pleasant, consist of a video camera and a separate unit - a recording device. They are designed to be installed anywhere in the car's interior. To this registrar, you can connect from two to four cameras that capture the video signal, which then transmit it to the recording device and are often stored on the memory card. Advantages of this type of DVRs are the ability to cover a large area and in good quality playback. But at the same time their installation is not so simple, and they consume a bit more energy than stand-alone counterparts.
Choose a car DVR
Before selecting a DVR,attention to some of the important parameters that determine its functional duties and quality. In their list, the first is the recording resolution, which is responsible for the detailing of small objects and the clarity of the image. It is measured by pixels, and the clarity of the image depends on their number - the more pixels, the higher the quality of the recording. Therefore, you need to choose a device that has a resolution of VGA, Full HD or HD.
Next, talking about how to chooseDVR, you need to take into account its recording speed. The image stream appears smoother when the number of frames recorded per second is large. Now the maximum number in the chambers is 25-30 fps.
Pay attention also to the sweepcar DVR. It can be of two types - either progressive or interlaced. At the device with interlaced scanning the image is issued by a method of a staffing on even and odd lines. A device with progressive scan forms immediately complete, whole frames. From this it follows that in the second variant the image quality will be better, especially when the "still picture" or slow-motion shooting.
The form of information compression is alsoAn important parameter if you need to know how to choose a DVR. Modern video compression formats - MPEG4, H.264, M-JPEG and MPEG. Maximum and without data loss it will be in the presence of H.264 format.
When choosing a DVR, you need to take into account the anglereview his video camera. The bigger it is, the fuller the picture will turn out. Do not forget, however, that the subject of the survey looks larger if the viewing angle is small and vice versa. The most optimal option is the angle of 100-140o diagonally.
And try to buy a device that has the minimum sensitivity, because it strongly affects the quality of the image. The unit of its measurement is suites, and the fewer of them, the better the quality.