What Is The Dash Cam?

- Jun 19, 2018-

What is the dash cam?


The dash cam is a device installed on a car to record the front or peripheral video and audio when the car is traveling. Commonly used wide-angle cameras, high-definition camera probes, multiple screen and video integrated dash cam, there are also need to use USB to connect the camera and the body.


Cheap Dash Cam Dashboard Video Cameras HD With G-Sensor For Cars.jpgBecause the car will automatically power off in the event of a collision, the corresponding driving recorder will also disconnect the power supply. This loses the meaning of the dash cam, so the dash cam needs a built-in battery to continue working. The dash cam's built-in battery uses a lithium battery and uses a standard voltage of 2.7-4.2V. In normal driving, plug in the power supply and charge it to keep the lithium battery fully charged. In general, when the video resolution is 1280*720, the front license plate can be clearly seen, and the license plate in the side lane is relatively blurred. In addition, whether the recorder has a CMOS with good photosensitivity is directly related to the effect of its night shooting.

Most of the dash cams use the H.264 compression format. Without a good compression method, not only does it mean occupying more storage capacity, but also has a higher requirement for the speed of the memory card. Otherwise, it is easy to drop frames and affect the compatibility of the memory card. The 1-minute clip size for H.264 compression at 720P resolution is approximately 60MB. For the owner, a reasonable choice of recording interval and capacity is helpful for the timely collection of evidence in the event of an accident. In general, it is appropriate to select 1 minute as the interval.